AD7985
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AD7985

16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $18.85
Features
  • 16-bit resolution with no missing codes
  • Throughput: 2.5 MSPS (TURBO high), 2.0 MSPS (TURBO low)
  • Low power dissipation
    • 15.5 mW at 2.5 MSPS, with external reference
    • 28 mW at 2.5 MSPS, with internal reference
  • INL: ±0.7 LSB typical, ±1.5 LSB maximum
  • SNR
    • 88.5 dB, with on-chip reference
    • 90 dB, with external reference
  • 4.096 V internal reference: typical drift of ±10 ppm/°C
  • Pseudo differential analog input voltage range
    • 0 V to VREF with VREF up to 5.0 V
    • Allows use of any input range
  • See data sheet for additional features
Additional Details
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The AD7985 is a 16-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 16-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7985 samples an analog input, IN+, between 0 V and REF with respect to a ground sense, IN−. The AD7985 features a very high sampling rate turbo mode (TURBO is high) and a reduced power normal mode (TURBO is low) for low power applications where the power is scaled with the throughput.

In normal mode (TURBO is low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.

The AD7985 is available in a 20-lead LFCSP with operation specified from −40°C to +85°C.

Applications

  • Battery-powered equipment
  • Communications
  • ATE
  • Data acquisition systems
  • Medical instruments
Part Models 2
1ku List Price Starting From $18.85

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD7985BCPZ
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AD7985BCPZ-RL7
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Product Lifecycle

PCN

Jul 25, 2017

- 17_0068

CANCELLED: Addition of ASE Korea as an Alternate Assembly Site for Select 3x3mm and 4x4mm Body Sizes LFCSP Devices

May 5, 2014

- 14_0020

Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.

Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Jul 25, 2017

- 17_0068

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CANCELLED: Addition of ASE Korea as an Alternate Assembly Site for Select 3x3mm and 4x4mm Body Sizes LFCSP Devices

May 5, 2014

- 14_0020

arrow down

Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines.

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

EVAL-AD7985

AD7985 Evaluation Board

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EVAL-AD7985

AD7985 Evaluation Board

AD7985 Evaluation Board

Product Detail

The EVAL-AD7985FMCZ is a fully featured evaluation kit for the AD7985. This board operates in conjunction with the system development platform board, EVAL-SDP-CH1Z. When operated with the system development platform board, software is provided enabling the user to perform detailed analysis of the performance of the ADC. This software has an accompanying user guide describing the operation and set up of the evaluation board when operated with the system development platform board.

Tools & Simulations

Tools & Simulations 2

Reference Designs

Reference Designs 1

Wide Dynamic Range Signal Conditioning Circuit

Oversampled SAR ADC with PGA Achieving Greater Than 125 dB Dynamic Range

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