AD7731
Info: : PRODUCTION
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AD7731

Low Noise, High Throughput 24-Bit Sigma-Delta ADC

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $16.01
Features
  • 24-Bit Sigma-Delta ADC
  • 16 Bits p-p Resolution at 800 Hz Output Rate
  • Programmable Output Rates up to 6.4 kHz
  • Programmable Gain Front End
  • ±0.0015% Nonlinearity
  • Buffered Differential Inputs
  • Programmable Filter Cutoffs
  • FASTStep Mode for Channel Sequencing
  • Single Supply Operation
Additional Details
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The AD7731 is a complete analog front-end for process control applications. The device has a proprietary programmable gain front end that allows it to accept a range of input signal ranges, including low level signals, directly from a transducer. The sigma-delta architecture of the part consists of an analog modulator and a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling time.

The part features three buffered differential programmable gain analog inputs (which can be configured as five pseudo-differential inputs), as well as a differential reference input. The part operates from a single +5 V supply and accepts seven unipolar analog input ranges: 0 to +20 mV, +40 mV, +80 mV, +160 mV, +320 mV, +640 mV and +1.28 V, and seven bipolar ranges: ±20 mV, ±40 mV, ±80 mV, ±160 mV, ±320 mV, ±640 mV and ±1.28 V. The peak-to-peak resolution achievable directly from the part is 16 bits at an 800 Hz output rate. The part can switch between channels with 1 ms settling time and maintain a performance level of 13 bits of peak-to-peak resolution.

The serial interface on the part can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. The AD7731 contains self-calibration and system calibration options and features an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C.

The part is available in a 24-lead plastic DIP, a 24-lead SOIC and 24-lead TSSOP package.

APPLICATIONS

  • Process Control
  • PLCs/DCS
  • Industrial Instrumentation
Part Models 6
1ku List Price Starting From $16.01

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD7731BNZ
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AD7731BRUZ
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AD7731BRUZ-REEL7
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AD7731BRZ
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AD7731BRZ-REEL
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AD7731BRZ-REEL7
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Part Models

Product Lifecycle

PCN

Mar 7, 2019

- 19_0046

Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek

Aug 19, 2009

- 07_0024

Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad

Aug 10, 2021

- 21_0035

Amkor Philippines as an Alternate Site for TSSOP_4.4

Jan 20, 2012

- 11_0218

Halogen Free Material Change for Certain TSSOP Products at Carsem

Aug 4, 2010

- 10_0117

Halogen Free Material Change for SOIC_W Products at Carsem

AD7731BRZ

PRODUCTION

AD7731BRZ-REEL

PRODUCTION

AD7731BRZ-REEL7

PRODUCTION

Feb 8, 2010

- 04_0080

Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 7, 2019

- 19_0046

arrow down

Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek

Aug 19, 2009

- 07_0024

arrow down

Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad

Aug 10, 2021

- 21_0035

arrow down

Amkor Philippines as an Alternate Site for TSSOP_4.4

Jan 20, 2012

- 11_0218

arrow down

Halogen Free Material Change for Certain TSSOP Products at Carsem

Aug 4, 2010

- 10_0117

arrow down

Halogen Free Material Change for SOIC_W Products at Carsem

AD7731BRZ

PRODUCTION

AD7731BRZ-REEL

PRODUCTION

AD7731BRZ-REEL7

PRODUCTION

Feb 8, 2010

- 04_0080

arrow down

Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.

Evaluation Kit

Evaluation Kits 1

Tools & Simulations

Tools & Simulations 3

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