ADAQ7768-1
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ADAQ7768-1

24-Bit Single Channel Precision μModule Data Acquisition System

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 1
1ku List Price Starting From $21.78
Features
  • Highly-integrated data acquisition solution
  • Seven programmable-gain options
    • G = 0.325, 0.65, 1.3, 2.6, 5.2, 10.4, 20.8 V/V
  • Maximum input range of ±12.6 V differential
  • Maximum input common-mode range of -12 V to +12 V
  • Fourth-order AAF with maximum flatness and linear phase
  • Full aliasing protection with 100 dB typical rejection
  • Excellent device-to-device phase matching and drift
    • Combined precision AC and DC performance:
    • Total system dynamic range up to 130 dB
    • −120 dB typical THD at 0.325 V/V gain
    • 100 dB minimum DC CMRR at 20.8 V/V gain
    • 25 pA maximum input bias current at 25°C
    • ±6 ppm typical INL
    • 5.5 ppm/°C maximum gain error drift
    • ±0.13° maximum device-to-device phase mismatch at 20 kHz
  • Programmable output data rate, filter type, and latency
  • Linear phase digital filter options:
  • Wideband low-ripple FIR filter (110 kHz maximum input bandwidth)
  • Sinc5 filter (1.024 MSPS, 198.4 kHz maximum input bandwidth, 4 μs maximum group delay)
  • Sinc3 filter (50 Hz/60 Hz rejection)
  • Integrated LDO
  • Built-in supply decoupling capacitors
  • Configuration through pin strapping or SPI
  • Digital interface optimized for isolated applications
  • Suite of diagnostic check mechanisms
  • Operating temperature range: −40°C to +85°C
  • Packaging: 12.00 mm × 6.00 mm 84-ball CSP_BGA with an 0.80 mm ball pitch
    • 10× footprint reduction vs. discrete solution
Additional Details
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The ADAQ7768-1 is a 24-bit precision data acquisition (DAQ) μModule® system that encapsulates signal conditioning, conversion, and processing blocks into one system-in-package (SiP) design for the rapid development of highly compact, high-performance precision DAQ systems.

The ADAQ7768-1 consists of:

  • A low-noise, low-bias current, high-bandwidth programmablegain instrumentation amplifier (PGIA) also capable of signal amplification and signal attenuation while maintaining high input impedance.
  • A fourth-order, low-noise, linear phase anti-aliasing filter.
  • A low-noise, low-distortion, high-bandwidth ADC driver plus an optional linearity boost buffer.
  • A high-performance medium bandwidth 24-bit Σ-Δ ADC with programmable digital filter.
  • A low-noise, low-dropout linear regulator.
  • Reference buffers.
  • Critical passive components required for the signal chain.

The ADAQ7768-1 supports fully differential input signal with a maximum range of ±12.6 V. It has an input common-mode voltage range of ±12 V with excellent common-mode rejection ratio (CMRR).

The input signal is fully buffered with very low input bias current of 2 pA typical. This allows easy input impedance matching and enables the ADAQ7768-1 to directly interface to sensors with high output impedance.

The seven pin-configurable gain settings offer additional system dynamic range and improved signal chain noise performance with input signals of lower amplitude.

A fourth-order low-pass analog filter combined with the user-programmable digital filter ensures the signal chain is fully protected against the high frequency noise and out-of-band tones presented at the input node from aliasing back into the band of interest. The analog low-pass filter is carefully designed to achieve high phase linearity and maximum in-band magnitude response flatness. Constructed with Analog Devices’s iPASSIVES technology, the resistor network used within the analog low-pass filter possesses superior resistance matching in both absolute values and overtemperature. As a result, the signal chain performance is maintained with minimum drift overtemperature and the ADAQ7768-1 has a tight phase mismatch across devices.

A high-performance ADC driver amplifier ensures the full settling of the ADC input at the maximum sampling rate. The driver circuit is designed for minimum additive noise, error, and distortion while maintaining stability. The fully differential architecture helps to maximize the signal chain dynamic range.

The analog-to-digital converter (ADC) inside the ADAQ7768-1 is a high-performance, 24-bit precision, single-channel sigma-delta converter with excellent AC performance and DC precision, and the throughput rate of 256 kSPS from a 16.384 MHz MCLK.

An optional linearity boost buffer further improves the signal chain linearity.

The ADAQ7768-1 is specified with the input reference voltage of 4.096 V, but the device can support reference voltages ranging from VDD_ADC down to 1 V.

The ADAQ7768-1 has two types of reference buffers: a precharge reference buffer to ease the reference input driving requirement or a full reference buffer to provide high impedance reference input. Both buffers are optional and can be turned off through register configuration.

ADAQ7768-1 supports three clock input types: crystal, complementary- metal-oxide-semiconductor (CMOS), or low-voltage differential signaling (LVDS).

Three types of digital low pass filters are available on the ADAQ7768-1. The wideband filter offers a filter profile similar to an ideal brick wall filter, making it ideal for frequency analysis. The sinc5 filter offers a low latency path with a smooth step response while maintaining a good level of aliasing rejection. It also supports an output data rate up to 1.024 MSPS from a 16.384 MHz MCLK, making the sinc5 filter ideal for low latency data capturing and time domain analysis. The sinc3 filter supports a wide decimation ratio and can produce output data rate down to 50 SPS from a 16.384 MHz MCLK. This, combined with the simultaneous 50Hz/ 60Hz rejection post filter, makes the sinc3 filter especially useful for precision DC measurement. All the three digital filters on the ADAQ7768-1 are FIR filters with linear phase response. The bandwidths of the filters, which directly correspond to the bandwidth of the DAQ signal chain, are fully programmable through register configuration.

The ADAQ7768-1 also supports two device configuration methods. The user has the option to choose to configure the device through register write through its SPI, or through a simple hardware pin strapping method to configure the device to operate under a number of predefined modes.

A single SPI supports both the register access and sample data readback functions. The ADAQ7768-1 always acts as a SPI target. Multiple interface modes are supported with a minimum of three IO channels required to communicate with the device.

The ADAQ7768-1 also features a suite of internal diagnostic functions to detect a broad range of errors during operation to improve the system reliability.

The ADAQ7768-1 device has an operating temperature range of −40°C to +85°C and is available in a 12.00 mm × 6.00 mm 84-ball CSP_BGA package with an 0.80 mm ball pitch, which makes it ideal for multiple channel applications. The ADAQ7768-1 uses only 75 mm2 of board space, 10 times less than the discrete solution that uses 750 mm2.

APPLICATIONS

  • Universal input measurement platform
  • Electrical test and measurement
  • Sound and vibration, acoustic and material science research and development
  • Control and hardware in loop verification
  • Condition monitoring for predictive maintenance
  • Audio test
Part Models 1
1ku List Price Starting From $21.78

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADAQ7768-1BBCZ
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Evaluation Kit

Evaluation Kits 2

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EVAL-ADAQ7768-1

Evaluating the ADAQ7768-1 24-Bit, Single-Channel Precision μModule Data Acquisition System

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EVAL-ADAQ7768-1

Evaluating the ADAQ7768-1 24-Bit, Single-Channel Precision μModule Data Acquisition System

Evaluating the ADAQ7768-1 24-Bit, Single-Channel Precision μModule Data Acquisition System

Features and Benefits

  • Evaluation kit for ADAQ7768-1 24-bit single-channel precision μModule® data acquisition system
  • Switch or GPIO controlled gain mode
  • Complete power management solution
  • FMC connector to FPGA for digital interface
  • Optional Arduino and PMOD connector

Product Detail

The EV-ADAQ7768-1FMC1Z evaluation kit features the ADAQ7768-1, a 24-bit, single-channel precision μModule® data acquisition (DAQ) system. The evaluation board demonstrates the performance of the ADAQ7768-1 μModule and is a versatile tool for a variety of applications.

The EV-ADAQ7768-1FMC1Z board connects to the USB port of the PC through the system demonstration platform (SDP-H1). By default, all the necessary supply rails on the EV-ADAQ7768-1FMC1Z are powered by a 3.3 V rail coming from the SDP-H1. The 3.3 V rail is regulated by the on-board power solution to ±15 V and 5.3 V to power the ADAQ7768-1 and its support components.

The EV-ADAQ7768-1FMC1Z is used alongside a downloadable evaluation software (ACE) that fully configures the ADAQ7768-1 device register functionality, and also provides DC and AC time and frequency domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation. The ACE software controls the EV-ADAQ7768-1FMC1Z over the USB through the system demonstration platform (SDPH1).

The ADAQ7768-1 data sheet provides a full description and complete specifications of the ADAQ7768-1. Consult it in conjunction with the user guide when using the evaluation board. Full details on the SDP-H1 are available on the SDP-H1 product page.

reference details image

EVAL-ADMX1001

Ultra-low Distortion Signal Generator Measurement Module, Fully Differential Input Acquisition Channel

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EVAL-ADMX1001

Ultra-low Distortion Signal Generator Measurement Module, Fully Differential Input Acquisition Channel

Ultra-low Distortion Signal Generator Measurement Module, Fully Differential Input Acquisition Channel

Features and Benefits

  • Ultra-low distortion, high-resolution source
    • DC, 50Hz to 40kHz Frequency Range
    • Proprietary digital pre-distortion (DPD) algorithm
    • –130dBc THD @ 1kHz (typ.)
    • Arbitrary waveform generation (AWG) with on-board pattern memory
    • Differential (balanced) output up to 3.5VRMS
    • Fast pattern switching between multiple stored waveforms
  • Fully Differential input Acquisition Channel
  • Small form-factor (60mm x 40mm)
  • Low power, 1W typ. (quiescent)
  • SPI interface for integration into test and measurement systems

Product Detail

The ADMX1001 is an ultra-low distortion sinewave and high-resolution arbitrary waveform generator with an acquisition channel. This high-performance module demonstrates a proprietary digital pre-distortion algorithm that reduces signal distortion below levels that can be achieved with high-performance digital-to-analog converters (DAC) and amplifiers alone. Its differential output can be set to common-mode levels often required to test high-performance analog-to-digital converters (ADC), audio codecs, and other audio ICs and systems. The signal generator and the acquisition channel can be individually controlled using separate, easy to use, SPI interfaces - combined with the module's small-form factor, the ADMX1001 can be easily embedded into test systems, or simply used on the bench for measurement and characterization.

APPLICATIONS

  • High-end audio test
  • Analog-to-digital converter characterization and test
  • Sensor and transducer test
  • Frequency response and network analysis
  • ATE
Tools & Simulations

Tools & Simulations 5

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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