Uninterruptable Power Supply Solutions

The LT8638S synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes the integration of input capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by reducing layout sensitivity. This performance makes the LT8638S ideal for noise sensitive applications and environments.

The fast, clean, low overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 25ns minimum on-time allows high step down ratios even at high switching frequencies. External compensation via the V_C pin allows for fast transient response. PolyPhase operation allows multiple LT8638S regulators to run with interleaving phase shift to provide more output current.

Burst Mode operation enables low standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions. Soft-start and tracking functionality is accessed via the SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.

Applications

• Automotive and Industrial Supplies
• General Purpose Step-Down

The ADuM4146 is a single-channel gate driver specifically optimized for driving silicon carbide (SiC), metal-oxide semiconductor field effect transistors (MOSFETs). Analog Devices, Inc., iCoupler^® technology provides isolation between the input signal and the output gate drive.

The ADuM4146 includes a Miller clamp to provide robust SiC turn off with a single-rail supply when the gate voltage drops to less than 2 V. Operation with unipolar or bipolar secondary supplies is possible with or without the Miller clamp operation.

The Analog Devices chip scale transformers also provide isolated communication of control information between the high voltage and low voltage domains of the chip. Information on the status of the chip can be read back from dedicated outputs. Control of resetting the device after a fault on the secondary side is performed on the primary side of the device.

Integrated onto the ADuM4146 is a desaturation detection circuit that provides protection against high voltage short-circuit SiC operation. The desaturation protection contains noise reducing features, such as a 300 ns masking time after a switching event to mask voltage spikes due to initial turn on (see Figure 17 in the data sheet). An optional internal 500 μA current source allows low device count, and the internal blanking switch allows the addition of an external current source if more noise immunity is needed.

The secondary undervoltage lockout (UVLO) is set to 14.5 V (typical) for Grade A and is set to 11.5 V (typical) for Grade B and Grade C with common SiC and insulated gate bipolar transistor (IGBT) levels taken into consideration.

APPLICATIONS

• SiC/MOSFET/IGBT gate drivers
• Photovoltaic (PV) inverters
• Motor drives
• Power supplies

The AD7606B is a 16-bit, simultaneous sampling, analog-to-digital data acquisition system (DAS) with eight channels, each channel containing analog input clamp protection, a programable gain amplifier (PGA), a low-pass filter, and a 16-bit successive approximation register (SAR), analog-to-digital converter (ADC). The AD7606B also contains a flexible digital filter, low drift, 2.5 V precision reference and reference buffer to drive the ADC and flexible parallel and serial interfaces.

The AD7606B operates from a single 5 V supply and accommodates ±10 V, ±5 V, and ±2.5 V true bipolar input ranges when sampling at throughput rates of 800 kSPS for all channels. The input clamp protection tolerates voltages up to ±21 V. The AD7606B has a 5 MΩ analog input impedance, resulting in less than 20 LSB bipolar zero code when the input signal is disconnected and pulled to ground through a 10 kΩ external resistor. The single supply operation, on-chip filtering, and high input impedance eliminates the need for external driver op amps, which require bipolar supplies. For applications with lower throughput rates, the AD7606B flexible digital filter can be used to improve noise performance.

In hardware mode, the AD7606B is fully compatible with the AD7606. In software mode, the following advanced features are available:

• Additional ±2.5 V analog input range.
• Analog input range (±10 V, ±5 V, and ±2.5 V), selectable per channel.
• Additional oversampling (OS) options, up to OS × 256.
• System gain, system offset, and system phase calibration per channel.
• Analog input open circuit detector.
• Diagnostic multiplexer.
• Monitoring functions (serial peripheral interface (SPI) invalid read/write, cyclic redundancy check (CRC), overvoltage and undervoltage events, busy stuck monitor, and reset detection).

Note that throughout this data sheet, multifunction pins, such as the RD/SCLK pin, are referred to either by the entire pin name or by a single function of the pin, for example, the SCLK pin, when only that function is relevant.

Applications

• Power line monitoring
• Protective relays
• Multiphase motor control
• Instrumentation and control systems
• Data acquisition systems

TThe fido5100 and fido5200 are real-time Ethernet, multiprotocol (REM), two-port switches. The REM switches provide customers the flexibility to select processors that best fit the application. The switches offer 10 Mbps/100 Mbps throughput and support most Layer 2 or Layer 3 protocols.

The fido5100 supports PROFINET real-time (RT) and isochronous real-time (IRT), EtherNet/IP with and without device level ring (DLR), Modbus TCP, and POWERLINK. The fido5200 supports EtherCAT and all protocols defined for the fido5100. The switches contain software drivers for each protocol. The software drivers provide an API for integration with any field device or protocol stack.

The REM switch architecture incorporates Analog Devices, Inc. PriorityChannel™ technology for efficient data transfers. Data is transferred to and from the switch using PriorityChannel queues. Thus, real-time data transfers can interrupt non-real-time data transfers to ensure timely delivery of critical data. These queues are managed by the switch driver and interface to the protocol stack to achieve the most efficient data transfers without application software involvement.

Additionally, PriorityChannel technology allows the switches to be immune to network loading effects. The REM switches automatically filter packets to prevent unwanted traffic from the processor, manage low priority traffic based on processor loading, and guarantee the timely delivery of high priority packets regardless of overall packet load.

The software drivers include a standard set of interfaces to support standard, low priority, TCP/IP communications, basic switch initialization, timer configuration, and interrupt management. This interface is common to all REM switch drivers, easing the porting of the application to each supported protocol. Each protocol has its own interface that configures the REM switch for optimal operation. This configuration is transparent to the user and can be performed at any time, including a soft-boot to change protocols without resetting the host processor or PHYs.

APPLICATIONS

• Industrial automation
• Process control
• Instrumentation
• Intelligent buildings

The LT^®8638-2 synchronous step-down regulator features the Silent Switcher^® architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This performance makes the LT8638-2 ideal for noise sensitive applications and environments.

The fast, clean, low overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 25ns minimum ontime allows high step down ratios even at high switching frequencies. External compensation through the V_C pin allows for fast transient response. PolyPhase operation allows multiple LT8638-2 regulators to run with interleaving phase shift to provide more output current.

Burst Mode operation enables low standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions. Soft-start and tracking functionality is accessed through the SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.

APPLICATIONS

• Automotive and Industrial Supplies
• General Purpose Step-Down

 The EVAL-ADuM4146WHB1Z is a half bridge gate drive board that allows simple evaluation of the performance of the ADuM4146 when driving advanced Wolfspeed third generation C3M^™ silicon carbide (SiC) metal-oxide semiconductor field-effect transistors (MOSFETs) and power modules. The EVAL-ADuM4146WHB1Z is intended to be used with Wolfspeed SpeedVal Kit, clamped inductive load (CIL) test boards, half bridge evaluation boards, and a differential transceiver board.

The EVAL-ADuM4146WHB1Z has an isolated return channel that is configured to read a negative temperature coefficient (NTC) thermistor and provide a variable frequency output corresponding to the resistance and temperature of the NTC.

The control and input interface for the EVAL-ADuM4146WHB1Z uses RS-422 signaling for improved noise and disturbance immunity and includes a 12 V power input.

For full details on the ADuM4146, see the ADuM4146 data sheet, which must be consulted when using the EVAL-ADuM4146WHB1Z.

The AD7606/AD7606-6/AD7606-4 are 16-bit, simultaneous sampling, analog-to-digital data acquisition systems (DAS) with eight, six, and four channels, respectively. Each part contains analog input clamp protection, a second-order antialiasing filter, a track-and-hold amplifier, a 16-bit charge redistribution successive approximation analog-to-digital converter (ADC), a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces.

The AD7606/AD7606-6/AD7606-4 operate from a single 5 V supply and can accommodate ±10 V and ±5 V true bipolar input signals while sampling at throughput rates up to 200 kSPS for all channels. The input clamp protection circuitry can tolerate voltages up to ±16.5 V. The AD7606 has 1 MΩ analog input impedance regardless of sampling frequency. The single supply operation, on-chip filtering, and high input impedance eliminate the need for driver op amps and external bipolar supplies. The AD7606/AD7606-6/AD7606-4 antialiasing filter has a 3 dB cutoff frequency of 22 kHz and provides 40 dB antialias rejection when sampling at 200 kSPS. The flexible digital filter is pin driven, yields improvements in SNR, and reduces the 3 dB bandwidth.

Applications

• Power-line monitoring and protection systems
• Multiphase motor control
• Instrumentation and control systems
• Multiaxis positioning systems
• Data acquisition systems (DAS)

The ADuM7701 is a high performance, second-order, Σ-Δ modulator that converts an analog input signal into a high speed, single-bit data stream, with on-chip digital isolation based on Analog Devices, Inc., iCoupler technology. The devices operate from a 5 V (V_DD1) power supply and accept a pseudo-differential input signal of ±250 mV (±320 mV full scale). The pseudo-differential input is ideally suited to shunt voltage monitoring in high voltage applications where galvanic isolation is required.

The analog input is continuously sampled by a high performance analog modulator, and converted to a ones density digital output stream with a data rate of up to 21 MHz. The original information can be reconstructed with an appropriate digital filter to achieve 86 dB signal to noise ratio (SNR) at 78. l kSPS with a 20 MHz MCLK for the ADuM7701. The serial input/output operates from a 5 V or a 3.3 V supply (V_DD2).

The serial interface is digitally isolated. High speed complementary metal oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The ADuM7701 device is offered in both 16-lead and 8-lead wide-body SOIC packages and have an operating temperature range of -40°C to +125° C.

Applications

• Shunt curent monitoring
• AC motor controls
• Power and solar inverters
• Wind turbine inverters
• Analog-to-digital and optoisolator replacement

The AD7380/AD7381 are a 16-bit and 14-bit pin-compatible family of dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a 3.0 V to 3.6 V power supply and feature throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and is sampled and converted on the falling edge of CS.

An integrated on-chip oversampling block improves dynamic range and reduces noise at lower bandwidths. A buffered internal 2.5 V reference is included. Alternatively, an external reference up to 3.3 V can be used.

The conversion process and data acquisition use standard control inputs allowing simple interfacing to microprocessors or digital signal processors (DSPs). The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using the separate logic supply.

The AD7380/AD7381 are available in a 16-lead lead frame chip scale package (LFCSP) with operation specified from −40°C to +125°C.

Product highlights

1. Dual simultaneous sampling and conversion with two complete ADC functions.
2. Pin-compatible product family.
3. High 4 MSPS throughput rate.
4. Space saving 3 mm × 3 mm LFCSP.
5. An integrated oversampling block to increase dynamic range, reduce noise, and reduce SCLK speed requirements.
6. Differential analog inputs with wide common-mode range.
7. Small sampling capacitor reduces amplifier drive burden.

Applications

• Motor control position feedback
• Motor control current sense
• Sonar
• Power quality
• Data acquisition systems
• Erbium doped fiber amplifier (EDFA) applications
• I and Q demodulation

The ADA4570 is an anisotropic magnetoresistive (AMR) sensor with integrated signal conditioning amplifiers and analog-to-digital converter (ADC) drivers. The ADA4570 produces two differential analog outputs that indicate the angular position of the surrounding magnetic field.

The ADA4570 consists of two die within one package, an AMR sensor, and a fixed gain instrumentation amplifier. The ADA4570 delivers amplified differential cosine and sine output signals, with respect to the angle, when the magnetic field is rotating in the x-axis and the y-axis (x-y) plane. The output voltage range is ratiometric to the supply voltage.

The sensor contains two Wheatstone bridges, at a relative angle of 45° to one another. A complete rotation of a dipole magnet produces two periods on the sinusoidal outputs. Therefore, the magnetic angle (α) calculated from the SIN and COS differential outputs represents the physical orientation of the magnet with respect to the ADA4570 in the 0° to 180° measurement range. Within a homogeneous field in the x-y plane, the output signals of the ADA4570 are independent of the physical placement in the z direction (air gap).

The ADA4570 is available in an 8-lead SOIC package.

APPLICATIONS

• Absolute position measurement (linear and angle)
• Brushless dc motor control and positioning
• Actuator control and positioning
• Contactless angular measurement and detection
• Magnetic angular position sensing

The ADA4571 is an anisotropic magnetoresistive (AMR) sensor with integrated signal conditioning amplifiers and ADC drivers. The ADA4571 produces two analog outputs that indicate the angular position of the surrounding magnetic field.

The ADA4571 consists of two die within one package, an AMR sensor, and a fixed gain (G = 40 nominally) instrumentation amplifier. The ADA4571 delivers clean and amplified cosine and sine output signals related to the angle of a rotating magnetic field. The output voltage range is ratiometric to the supply voltage.

The sensor contains two Wheatstone bridges, at a relative angle of 45° to one another. A rotating magnetic field in the x-y sensor plane delivers two sinusoidal output signals with the double frequency of the angle (α) between sensor and magnetic field direction. Within a homogeneous field in the x-y plane, the output signals are independent of the physical placement in the z direction (air gap).

The ADA4571 is available in an 8-lead SOIC package.

Product Highlights

1. Contactless angular measurement.
2. Measures magnetic field direction rather than field intensity.
3. Minimum sensitivity to air gap variations.
4. Large working distance.
5. Excellent accuracy, even for weak saturation fields.
6. Minimal thermal and lifetime drift.
7. Negligible hysteresis.
8. Single chip solution.

Applications

• Absolute position measurement (linear and angle)
• Brushless dc motor control and positioning
• Actuator control and positioning
• Contactless angular measurement and detection
• Magnetic angular position sensing

The ADuM4221/ADuM4221-1/ADuM4221-2 are 4 A isolated, half bridge gate drivers that employ the Analog Devices, Inc., iCoupler^® technology to provide independent and isolated high-side and low-side outputs. The ADuM4221/ADuM4221-1/ADuM4221-2 provide 5700 V rms isolation in an increased creepage wide body, 16-lead SOIC_IC. Combining high speed CMOS and monolithic transformer technology, these isolation components provide outstanding performance characteristics superior to the alternatives, such as the combination of pulse transformers and gate drivers.

The isolators operate with a logic input voltage ranging from 2.5 V to 6.5 V, providing compatibility with lower voltage systems. In comparison to gate drivers employing high voltage level translation methodologies, the ADuM4221/ADuM4221-1/ADuM4221-2 offer the benefit of true, galvanic isolation between the input and each output.

The ADuM4221/ADuM4221-1/ADuM4221-2 each have built in overlap protection and allow dead time adjustment. A single resistor between the dead time pin (DT) and the GND¹ pin sets the dead time on the secondary side between the high-side and the low-side outputs.

An internal thermal shutdown (TSD) sets outputs low if the internal temperature on the ADuM4221/ADuM4221-1/ADuM4221-2 exceeds the TSD temperature. As a result, the ADuM4221/ADuM4221-1/ADuM4221-2 provide reliable control over the switching characteristics of the insulated gate bipolar transistor (IGBT)/metal-oxide semiconductor field effect transistor (MOSFET) configurations over a wide range of positive or negative switching voltages.

Applications

• Switching power supplies
• Isolated IGBT/MOSFET gate drives
• Industrial inverters
• Gallium nitride (GaN)/silicon carbide (SiC) compatible

¹ Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,239. Other patents pending.

The ADuM4135 is a single-channel gate driver specifically optimized for driving insulated gate bipolar transistors (IGBTs). Analog Devices, Inc., iCoupler^® technology provides isolation between the input signal and the output gate drive.

The ADuM4135 includes a Miller clamp to provide robust IGBT turn-off with a single-rail supply when the gate voltage drops below 2 V (typical). Operation with unipolar or bipolar secondary supplies is possible, with or without the Miller clamp operation.

The Analog Devices chip scale transformers also provide isolated communication of control information between the high voltage and low voltage domains of the chip. Information on the status of the chip can be read back from dedicated outputs. Control of resetting the device after a fault on the secondary is performed on the primary side of the device.

Integrated onto the ADuM4135 is a desaturation detection circuit that provides protection against high voltage short-circuit IGBT operation. The desaturation protection contains noise reducing features such as a 370 ns (typical) masking time after a switching event to mask voltage spikes due to initial turn-on. An internal 537 μA (typical) current source allows low device count and the internal blanking switch allows the addition of an external current source if more noise immunity is needed.

The secondary UVLO is set to 11.67 V (typical) with common IGBT threshold levels taken into consideration.

APPLICATIONS

• MOSFET/IGBT gate drivers
• PV inverters
• Motor drives
• Power supplies
• Automotive

The ADuM6020/ADuM6028¹ are isoPower^®, integrated, isolated dc-to-dc converters. Based on the Analog Devices, Inc., iCoupler^® technology, these dc-to-dc converters provide regulated, isolated power that is below CISPR22 Class B limits at full load on a 2‑layer printed circuit board (PCB) with ferrites. Common voltage combinations and the associated current output levels are shown in Table 1 through Table 4 in the data sheet.

The ADuM6020/ADuM6028 eliminate the need to design and build isolated dc-to-dc converters in applications up to 500 mW. The iCoupler chip scale transformer technology is used for the magnetic components of the dc-to-dc converter. The result is a small form factor, isolated solution.

The ADuM6020/ADuM6028 isolated dc-to-dc converters provide two different package variants: the ADuM6020 in a wide-body, 16-lead SOIC_IC package, and the ADuM6028 in the space-saving, 8-lead, wide-body SOIC_IC package. For 5 V input operations, use the ADuM6020-5BRIZ and the ADuM6028-5BRIZ. For 3.3 V input to 3.3 V output operations, use the ADuM6020-3BRIZ and the ADuM6028-3BRIZ. See the Pin Configuration and Function Descriptions section and the Ordering Guide in the data sheet for more information.

APPLICATIONS

• RS-485/RS-422/CAN transceiver power
• Power supply start-up bias and gate drives
• Isolated sensor interfaces
• Automotive on-board charger (OBC) and dc to dc
• Industrial PLCs

¹ Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.

The ADIN1200 is a low power, single-port, 10 Mbps and 100 Mbps Ethernet transceiver with low latency specifications designed for industrial Ethernet applications.

This design integrates an energy efficient Ethernet (EEE) physical layer device (PHY) core with all associated common analog circuitry, input and output clock buffering, management interface and subsystem registers, and media access control (MAC) interface and control logic to manage the reset, clock control and pin configuration.

The ADIN1200 is available in a 5 mm × 5 mm, 32-lead lead frame chip scale package (LFCSP) and can operate with a single 3.3 V supply, assuming the use of a 3.3 V MAC interface supply. For maximum flexibility in system level design, a separate VDDIO supply enables the management data input/output (MDIO) and MAC interface supply voltages to be configured independently of the other circuitry on the ADIN1200 allowing operation at 1.8 V, 2.5 V, or 3.3 V. At power-up, the ADIN1200 is held in hardware reset until each of the supplies has crossed its minimum rising threshold value and the power is considered good. Brownout protection is provided by monitoring the supplies to detect if one or more of them drops below a minimum falling threshold and holding the device in hardware reset until the power supplies return and satisfy the power-on-reset (POR) circuit.

The MII management interface (also referred to as MDIO interface) provides a 2-wire serial interface between a host processor or MAC and the ADIN1200, allowing access to control and status information in the PHY core management registers. The interface is compatible with both IEEE^® 802.3^™ Standard Clause 22 and Clause 45 management frame structures.

The ADIN1200 can support cable lengths up to 180 meters.

Note that throughout this data sheet, multifunction pins, such as XTAL_I/CLK_IN/REF_CLK, are referred to either by the entire pin name or by a single function of the pin, for example, XTAL_I, when only that function is relevant.

Applications

• Industrial automation
• Process control
• Factory automation
• Robotics and motion Control
• Building automation
• Test and Measurement
• Industrial internet of things (IoT)

The ADuM3150 is a 6-channel SPIsolator^™ digital isolator optimized for isolated serial peripheral interfaces (SPIs). Based on the Analog Devices, Inc., iCoupler^® chip scale transformer technology, the low propagation delay in the CLK, MO/SI, MI/SO, and SS SPI bus signals supports SPI clock rates of up to 17 MHz. These channels operate with 14 ns propagation delay and 1 ns jitter to optimize timing for SPI.

The ADuM3150 isolator also provides two additional independent low data rate isolation channels, one channel in each direction. Data in the slow channels is sampled and serialized for a 250 kbps data rate with 2.5 μs of jitter.

The ADuM3150 supports a delay clock output on the master side of the device. This output can be used with an additional clocked port on the master to support 40 MHz clock performance. See the Delay Clock section for more information.

Applications

• Industrial programmable logic controllers (PLC)
• Sensor isolation

The ADuM3190 is an isolated error amplifier based on Analog Devices, Inc., iCoupler^® technology. The ADuM3190 is ideal for linear feedback power supplies. The primary side controllers of the ADuM3190 enable improvements in transient response, power density, and stability as compared to commonly used optocoupler and shunt regulator solutions.

Unlike optocoupler-based solutions, which have an uncertain current transfer ratio over lifetime and at high temperatures, the ADuM3190 transfer function does not change over its lifetime, and it is stable over a wide temperature range of −40°C to +125°C.

Included in the ADuM3190 is a wideband operational amplifier for a variety of commonly used power supply loop compensation techniques. The ADuM3190 is fast enough to allow a feedback loop to react to fast transient conditions and overcurrent conditions. Also included is a high accuracy 1.225 V reference to compare with the supply output setpoint.

The ADuM3190 is packaged in a small 16-lead QSOP package for a 2.5 kV rms isolation voltage rating.

Applications

• Linear power supplies
• Inverters
• Uninterruptible Power Supply (UPS)
• DOSA-compatible modules
• Voltage monitors
• Automotive systems

The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ADuM6424A¹ are quad-channel digital isolators with an isoPower^®, integrated, isolated dc-to-dc converter. Based on the Analog Devices, Inc., iCoupler^® technology, the dc-to-dc converter provides regulated, isolated power that meets CISPR 32/EN 55032 Class B limits at a full load on a 2-layer printed circuit board (PCB) with ferrites. Popular voltage combinations and the associated output current levels are listed in Table 1 in the data sheet.

The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ADuM6424A eliminate the need for a separate, isolated dc-to-dc converter in 500 mW, isolated designs. The iCoupler chip scale transformer technology is used for isolated logic signals and for the magnetic components of the dc-to-dc converter. The result is a small form factor, total isolation solution.

The ADuM6420A/ADuM6421A/ADuM6422A/ADuM6423A/ADuM6424A isolators provide four independent isolation channels. See the Pin Configurations and Function Descriptions in the data sheet for additional information.

APPLICATIONS

• RS-232 transceivers
• Power supply start-up bias and gate drives
• Isolated sensor interfaces
• Automotive on-board charger (OBC) and dc to dc
• Industrial programmable logic controllers (PLCs)

Testing and evaluating power systems in industrial and communications settings often requires multiple voltage and current measurements. Individual supplies may be referenced to different grounds, have either positive or negative polarity, or may be floating with no defined relationship to other power domains. Such scenarios necessitate either individual floating multimeters, or multichannel meters with per-channel isolation, which are physically cumbersome and expensive.

The circuit shown in Figure 1 is a complete, isolated current and voltage measurement system for industrial, telecommunications, instrumentation, and automated test equipment (ATE) applications. The system is galvanically isolated and will tolerate up to +/-250 V between the host controller and measurement grounds. The isolation design includes both digital data and power domain signals; no additional power source is required from the circuit being measured.

The current input range is +/-10 A and the voltage input range is selectable from 16 V to 80 V, with several ranges between these values. Both voltage and current inputs feature 16-bit resolution with adjustable output data rate and signal bandwidth, including modes that reject both 50 Hz and 60 Hz line noise.

The circuit is compatible with Arduino form-factor platform boards, and supports logic voltages from 1.8 V to 5 V. When paired with the open-source firmware example, application software can easily communicate with the reference design over the Linux Industrial Input/Output (IIO) framework using the libiio library, which includes bindings for C, C#, MATLAB, Python, and LabVIEW.

Designing and optimizing power solutions for data processing, networking, portable, wearable, and other computing applications require precision, wide band, high dynamic range measurement of voltages and currents. Systems may contain one, tens, or hundreds of central processing units (CPUs), graphical processing units (GPUs), network interfaces, storage hardware, and a myriad of support circuitry.

In response to changing system demands, these circuits can transition from drawing microamps of current in an idle state to hundreds of amps under full load in a matter of microseconds. In addition, automatic test equipment (ATE) test solutions and power analyzers typically use multiple channels to precisely capture the current, voltage, or power profile; and measure harmonics over a wider bandwidth.

Low voltage supply rails have stringent noise requirements and must be characterized under varying load conditions, temperatures, and account for bypass capacitor degradation over time.

The circuit shown in Figure 1 provides a complete, wide-range current measurement system suitable for these challenging applications. Accuracy, bandwidth, and drift performance are at the same level with benchtop and rack-mount test equipment suitable for use in a production test environment. At the same time, the solution is small enough to be incorporated into these applications that need to be continuously monitored. A 15 MSPS sample rate greatly relaxes the antialiasing filter requirements and maximizes bandwidth when digitizing fast transients and small signal levels. Additional oversampling can be applied to trade off between noise and bandwidth to suit the specific measurement being performed.