AD7767

PRODUCTION

24-Bit, 15 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs

Data Sheet (Rev. D) Product Selection Table
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Overview

  • Oversampled successive approximation (SAR) architecture
  • High performance ac and dc accuracy, low power
    115.5 dB dynamic range, 32 kSPS (AD7767-2)
    112.5 dB dynamic range, 64 kSPS (AD7767-1)
    109.5 dB dynamic range, 128 kSPS (AD7767)
    −118 dB THD
  • Exceptionally low power
    8.5 mW, 32 kSPS (AD7767-2)
    10.5 mW, 64 kSPS (AD7767-1)
    15 mW, 128 kSPS (AD7767)
  • High dc accuracy
    24 bits, no missing codes (NMC)
    INL: ±3 ppm (typical), ±7.6 ppm (maximum)
  • Low temperature drift
    Zero error drift: 15 nV/°C
    Gain error drift: 0.4 ppm/°C
  • On-chip low-pass FIR filter
    • Linear phase response
    Pass-band ripple: ±0.005 dB
    Stop-band attenuation: 100 dB
  • 2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options
  • Flexible interfacing options
    Synchronization of multiple devices
    Daisy-chain capability
    Power-down function
  • Temperature range: −40°C to +105°C

The AD7767/AD7767-1/AD7767-2 are high performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). The AD7767/AD7767-1/AD7767-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, and are contained in a 16-lead TSSOP package.

Ideal for ultralow power data acquisition (such as PCI- and USB-based systems), the AD7767/AD7767-1/AD7767-2 provide 24-bit resolution. The combination of exceptional SNR, wide dynamic range, and outstanding dc accuracy make the AD7767/AD7767-1/AD7767-2 ideally suited for measuring small signal changes over a wide dynamic range. This is particularly suitable for applications where small changes on the input are measured on larger ac or dc signals. In such an application, the AD7767/AD7767-1/AD7767-2 accurately gather both ac and dc information.

The AD7767/AD7767-1/AD7767-2 include an on-board digital filter (complete with linear phase response) that acts to elimi-nate out-of-band noise by filtering the oversampled input voltage. The oversampled architecture also reduces front-end antialias requirements. Other features of the AD7767 include a SYNC/PD (synchronization/power-down) pin, allowing the synchronization of multiple AD7767 devices. The addition of an SDI pin provides the option of daisy chaining multiple AD7767 devices.

The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply using a 5 V reference. The devices operate from −40°C to +105°C.

Applications

  • Low power PCI/USB data acquisition systems
  • Low power wireless acquisition systems
  • Vibration analysis
  • Instrumentation
  • High precision medical acquisition

AD7767
24-Bit, 15 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs
AD7767-fbl AD7767-pc
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Documentation

Data Sheet 1

Technical Articles 2

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Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
Differential Amplifiers 2
ADA4941-1
PRODUCTION Single-Supply, Differential 18-Bit ADC Driver
AD8475
PRODUCTION Precision, Selectable Gain, Fully Differential Funnel Amplifier
LDO Linear Regulators 2
ADP150
PRODUCTION Ultralow Noise, 150 mA CMOS Linear Regulator
ADP151
PRODUCTION Ultralow Noise, 200 mA, CMOS Linear Regulator
Operational Amplifiers (Op Amps) 1
ADA4841-1
PRODUCTION Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier
Voltage References 6
ADR445
PRODUCTION Ultralow Noise, LDO XFET® 5.0V Voltage Reference w/Current Sink and Source
ADR435
PRODUCTION Ultralow Noise XFET® Voltage References with Current Sink and Source Capability
ADR425
PRODUCTION Ultraprecision, Low Noise, 5.00 V XFET® Voltage Reference
ADR441
PRODUCTION Ultralow Noise, LDO XFET® 2.5V Voltage Reference w/Current Sink and Source
ADR431
PRODUCTION Ultralow Noise XFET® Voltage References with Current Sink and Source Capability
ADR421
PRODUCTION Ultraprecision, Low Noise, 2.500 V XFET® Voltage References
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Evaluation Kits

EVAL-AD7767

AD7767 Evaluation Board

Buy Now View Details

Features and Benefits

  • Full-featured evaluation board for the:
    • AD7767
    • AD7767-1
    • AD7767-2
  • CED compatible
  • Standalone capability
  • On-board analog buffering and voltage reference
  • Various linking options
  • PC software for control and data analysis when used with the EVAL-CED1Z
  • Linearity Evaluation

Product Details

The AD7767 has a maximum output data rate of 128 KHz. The derivatives AD7767-2 operate at a max speed of 64 KHz, with the AD7767-2 offering a max speed of 32 KHz. The AD7767-1 and AD7767-2 versions digitally filter more rigorously, meaning that greater noise performance is achieved, trading off on output data rate.


All the AD7767 devices (AD7767, AD7767-1, AD7767-2) offer 18-bit linearity (3ppm).


Full details on the versions of the AD7767 are available in the AD7767 data sheet, which is available from Analog Devices, Inc., and should be consulted in conjunction with this data sheet when using the evaluation board.


Please note: This Evaluation software was compiled in Windows 7 and compatibility with later OS is not guaranteed.
EVAL-AD7767
AD7767 Evaluation Board

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