Features and Benefits
- Input voltage range: 3.2 V to 15 V, output current: 800 mA
- Quiescent current < 14 µA in power saving mode (PSM)
- >90% efficiency
- Force PWM pin (SYNC), 600 kHz/1.2 MHz frequency pin (FSEL)
- Fixed outputs: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 5 V, and adjustable option
- 100% duty cycle capability
- Initial accuracy: ±1%
- Low shutdown current: <1.2 µA
- Quick output discharge (QOD) option (ADP2371)
- Synchronizable to an external clock
- 8-lead, 0.75 mm × 3 mm × 3mm LFCSP (QFN) package
- Supported by ADIsimPower design tool
The ADP2370/ADP2371 are high efficiency, low quiescent current, 800 mA buck (step-down) dc-to-dc converters in small 8-lead, 3 mm × 3 mm LFCSP (QFN) packages. The total solution requires only three tiny external components.
The buck regulator uses a proprietary high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. The need for an external rectifier is eliminated by using a high efficiency synchronous rectifier architecture.
To ensure the longest battery life in portable applications, the ADP2370/ADP2371 employ a power saving variable frequency mode that reduces the switching frequency under light load conditions. The ADP2370/ADP2371 operate from input voltages of 3.2 V to 15 V allowing the use of multiple alkaline/NiMH, lithium cells, or other standard power sources.
The ADP2370/ADP2371 offer multiple options for setting the operational frequency. The ADP2370/ADP2371 can be synchronized to a 600 kHz to 1.2 MHz external clock or it can be forced to operate at 600 kHz or 1.2 MHz via the FSEL pin. The ADP2370/ ADP2371 can be forced to operate in PWM mode (FPWM) when noise considerations are more important than efficiency.
A power-good output is available to indicate when the output voltage is below 92% of its nominal value.
The ADP2371 is identical to the ADP2370 except that the ADP2371 includes the addition of an integrated switched resistor, quick output discharge function (QOD) that automatically discharges the output when the device is disabled.
Both devices include an internal power switch and a synchronous rectifier for minimal external part count and high efficiency. The ADP2370/ADP2371 also include internal soft start and internal compensation for ease of use.
During a logic controlled shutdown, the input is disconnected from the output and the regulator draws less than 1.2 μA from the input source. Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input overcurrent at startup. Short-circuit protection and thermal overload protection circuits prevent damage under adverse conditions.
The ADP2370/ADP2371 each use one 0805 capacitor, one 1206 capacitor, and one 4 mm × 4 mm inductor. The total solution size is about 53 mm2 resulting in a very small footprint solution to meet a variety of portable applications.
- Portable and battery-powered equipment
- Automatic meter readers (WSN)
- Point of sales and transaction processing instruments
- Medical instruments
- Medium format display tablets and pads
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (6)
The ADP2371 is identical to the ADP2370 except for a quick output discharge feature. Therefore, the evaluation board can be used for both products. However, the RedyKit only contains ADP2370 chips. Use the sample ordering process to get ADP2371 chips if that is what your design requires.
This product has individual evaluations boards at specific voltages or with specific features as well as the RedyKit™. The RedyKit simplifies product evaluation by providing two assembled and tested evaluation boards, plus a full set of product (voltage) options for an IC regulator. All the IC options come sorted and stored in the kit with the Analog Devices part number clearly printed on each antistatic zip-top bag.
Simple device measurements such as line and load regulation, dropout, and ground current can be demonstrated with just a single voltage supply, a voltmeter, a current meter, and load resistors.
Features & Benefits
- Two fully assembled and tested evaluation boards per kit
- Full set of IC voltage options in each kit
- 3 samples of each IC voltage option packed in separate antistatic bags
- Kit allows the user to quickly evaluate all IC voltage options
- Only need to order one kit per product family
This evaluation board is obsolete and no longer recommended. For more information visit ADI EagleEye™.
The Blackfin Low-power Imaging Platform (BLIP) is a low cost, low power embedded computer vision platform targeting a vast array of real-time sensing applications. BLIP leverages the latest entry within the industry-leading, low power Blackfin processor family as well as Analog Devices’ optimized software library deliverables. This solution offers end equipment manufacturers an out of the box form factor development platform with multiple functional profiles covering intelligent motion sensing, people counting, vehicle detection, and face detection deployable in both indoor and outdoor use cases. The BLIP system includes an intuitive configuration GUI and enables real-time analysis of captured video, as well as video output/display through an on-board USB port, making it a highly valuable tool for product development. Additionally, the associated documentation package is well positioned to help customers accelerate their time to market.
The AD-FMComms11-EBZ board is a system platform board for communication infrastructure applications that demonstrates the Direct to RF (DRF) transmitter and observation receiver architecture. Using high sample rate RFDAC(s) and RFADC(s), a number of components in previous generation transmitters can be eliminated, such as mixers, modulators, IF amplifiers and filters. The objective being to bring the ADC or DAC as close to the antenna as possible, leading to possibly more cost effective and efficient communications solution.
It is composed of multi-GSPS RF ADC and DAC, AD9625 and AD9162 respectively. The transmit path contains a balun, low pass filter, gain block and variable attenuation to produce an output appropriate for a power amplifier module. Along the observation path, the PA output is coupled back into the board through a variable attenuator, a balun and finally the ADC. Clock management is taken care of on board; all the necessary clocks are generated from a reference. Power management is present as well.
Features & Benefits
- 16-bit 12GSPS RFDAC
- JESD204B Interface
- 8 lanes up to 12.5Gbps
- 1x/2x/4x/6x/8x/12x/16x/24x/32x Interpolation
- 64-bit NCO at max rate
- Analog Modes of Operation:
- Normal Mode: 6GSPS DAC rate
- Synthesis up to 2.5GHz (1st Nyquist)
- Mix Mode: 6GSPS DAC rate
- Synthesis in 2nd & 3rd Nyquist zones
- 2X Normal Mode: 12GSPS DAC rate
- Synthesis up to 6GHz (1st Nyquist)
- Excellent dynamic performance
- Normal Mode: 6GSPS DAC rate
- 3.2GHz full power bandwidth at 2.5GSPS
- Noise Density = -149.5dBFs/Hz, ENOB = 9.5 bits
- SFDR = 77 dBc at 1GHz Ain (2.5Gsps)
- SFDR = 77dBc at 1.8GHz Ain (2.5Gsps)
- +/-0.3 LSB DNL, +/-1.0 LSB INL
- Dual supplies : 1.3V and 2.5V
- 8 or 6 Lane JESD204B Outputs
- Programmable clipping threshold for Fast Detect output
- Two Integrated wide band digital down converters (DDC) per channel
- 10-bit complex NCO
- 2 cascaded half band filters (dec/8, dec/16)
- Timestamp for synchronous processing alignment
- SYSREF Setup/Hold detector
- Programmable Interrupt (IRQ) event monitor
- 3.2GHz full power bandwidth at 2.5GSPS
The AD-FREQCVT1-EBZ is an add on board for the FMCOMMS3/4/5 boards which contain the AD9361. While the complete chip level design package can be found on the ADI product pages, information on the card, how to use it, the design package that surrounds it, and the software which can make it work, can be found on the analog wiki site.
The purpose of the AD-FREQCVT1-EBZ is frequency up or down conversion to allow the AD9361 to operate down to 1MHz.
The AD-TRXBOOST1-EBZ is an add on board for the FMCOMMS2/3/4/5 boards which contain the AD9361. While the complete chip level design package can be found on the ADI product pages, information regarding the board itself, how to use it and the design package that surrounds it, can be found on the Analog wiki site.
The purpose of the AD-TRXBOOST1-EBZ is to boost the transmit and receive signal to improve the dynamic range and increate the output power of the AD9361 around 2.45GHz which is what the board is tuned for.
The AD-FMCOMMS6-EBZ eval board is a 400MHz to 4.4GHz receiver based on the AD9652 dual 16bit analog to digital converter, the ADL5566 High Dynamic Range RF/IF Dual Differential Amplifier and the ADL5380 quadrature demodulator.
This is an I and Q demodulation approach to direct convert (also known as a homodyne or zero IF) receiver architecture. Direct conversion radios perform just one frequency translation compared to a super-heterodyne receiver that can perform several frequency translations. One frequency translation is advantageous because it:
- Reduces receiver complexity and the number of stages needed, increasing performance and reducing power consumption
- Avoids image rejection issues and unwanted mixing
This topology will provide image rejection and early implementation of the differential signal environment. There is an amplification stage to maintain the full-scale input to the ACD. The local oscillator and ADC clock are on board and share the same reference signal prevent smearing. The form factor is VITA57 compliant and all of the DC power is routed from the data capture board through an FMC connector. This evaluation board demonstrates a high performance receiver signal chain aimed at military and commercial radar using “commercial off the shelf” (COTS) components. The overall circuit has a bandwidth of 220MHz with a pass band flatness of +/_ 1.0 dB. The SNR and SFDR measured at an IF of 145MHz are 64dB and 75dBc, respectively.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Press Releases (1)
Technical Articles (3)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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