AD7685
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AD7685

16-Bit, 250 kSPS PulSAR® ADC in MSOP/QFN

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Part Details
Part Models 9
1ku List Price Starting From $9.19
Features
  • 16-bit resolution with no missing codes
  • Throughput: 250 kSPS
  • INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR)
  • SINAD: 93.5 dB @ 20 kHz
  • THD: −110 dB @ 20 kHz
  • Pseudo differential analog input range 0 V to VREF with VREF up to VDD
  • No pipeline delay
  • Daisy-chain multiple ADCs, BUSY indicator
  • Single-supply operation 2.3 V to 5.5 V with 1.8 V to 5 V logic interface
  • Serial interface SPI®-/QSPI-/MICROWIRE-/DSP-compatible
  • Power dissipation:
    1.4 μW @ 2.5 V/100 SPS
    1.35 mW @ 2.5 V/100 kSPS, 4 mW @ 5 V/100 kSPS
  • Standby current: 1 nA
Additional Details
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The AD7685 is a 16-bit, charge redistribution successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage.

Power dissipation scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy chain several ADCs on a single 3-wire bus or provides an optional BUSY indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO.

The AD7685 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.

APPLICATIONS

  • Battery-powered equipment
  • Medical instruments
  • Mobile communications
  • Personal digital assistants (PDAs)
  • Data acquisition
  • Instrumentation
  • Process controls
Part Models 9
1ku List Price Starting From $9.19

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Documentation

Documentation

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

PCN

Feb 2, 2024

- 23_0143

Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process 

AD7685ACPZRL7

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AD7685ARMZ

PRODUCTION

AD7685ARMZRL7

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AD7685BCPZRL7

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Jul 5, 2022

- 21_0271

Qualification of an Alternate Adhesive Material and Molding Compound for Select LFCSP Packages

Oct 18, 2016

- 16_0036

Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select LFCSP Products

May 15, 2012

- 10_0006

Halogen Free Material Change for mini SOIC Products

AD7685ARMZ

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AD7685ARMZRL7

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AD7685BRMZ

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AD7685BRMZRL7

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AD7685CRMZ

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AD7685CRMZRL7

PRODUCTION

Aug 25, 2009

- 09_0165

Test transfer of AD7683,AD7684, AD7685, AD7686, AD7942 and AD9833 from StatsChipPac Singapore (SCS) to Carsem Malaysia (CRS)

AD7685ARMZ

PRODUCTION

AD7685ARMZRL7

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AD7685BRMZ

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AD7685BRMZRL7

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AD7685CRMZ

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AD7685CRMZRL7

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Filter by Model

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Part Models

Product Lifecycle

PCN

Feb 2, 2024

- 23_0143

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Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process 

AD7685ACPZRL7

PRODUCTION

AD7685ARMZ

PRODUCTION

AD7685ARMZRL7

PRODUCTION

AD7685BCPZRL7

PRODUCTION

AD7685BRMZ

PRODUCTION

AD7685BRMZRL7

PRODUCTION

AD7685CCPZRL7

PRODUCTION

AD7685CRMZ

PRODUCTION

AD7685CRMZRL7

PRODUCTION

Jul 5, 2022

- 21_0271

arrow down

Qualification of an Alternate Adhesive Material and Molding Compound for Select LFCSP Packages

Oct 18, 2016

- 16_0036

arrow down

Assembly Relocation to Stats ChipPAC Jiangyin and Test Transfer to Stats ChipPAC Singapore of Select LFCSP Products

May 15, 2012

- 10_0006

arrow down

Halogen Free Material Change for mini SOIC Products

AD7685ARMZ

PRODUCTION

AD7685ARMZRL7

PRODUCTION

AD7685BRMZ

PRODUCTION

AD7685BRMZRL7

PRODUCTION

AD7685CRMZ

PRODUCTION

AD7685CRMZRL7

PRODUCTION

Aug 25, 2009

- 09_0165

arrow down

Test transfer of AD7683,AD7684, AD7685, AD7686, AD7942 and AD9833 from StatsChipPac Singapore (SCS) to Carsem Malaysia (CRS)

AD7685ARMZ

PRODUCTION

AD7685ARMZRL7

PRODUCTION

AD7685BRMZ

PRODUCTION

AD7685BRMZRL7

PRODUCTION

AD7685CRMZ

PRODUCTION

AD7685CRMZRL7

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 2

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EVAL-AD7685-PMDZ

16-Bit, 250 kSPS PulSAR® ADC PMOD Evaluation Board

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EVAL-AD7685-PMDZ

16-Bit, 250 kSPS PulSAR® ADC PMOD Evaluation Board

16-Bit, 250 kSPS PulSAR® ADC PMOD Evaluation Board

Features and Benefits

  • 16-Bit Analog to Digital Converters
  • 250 kSPS
  • Unipolar, Single-Ended Input
  • Standard SPI PMOD header/pin out
  • Connectable to 3rd Party FPGA and MCU Platforms

Product Detail

The PMOD-compatible evaluation/prototyping board is a small form factor, low-cost analog-to-digital conversion option. When prototyping, this board is used in conjunction with your favorite MCU or FPGA development board which has the SPI PMOD peripheral connector. Direct electrical and physical connection will enable you to quickly develop software for your system.

This board can also be operated as an evaluation board using the System Demonstration Platform (EVAL-SDP-CB1Z) and an adaptor board (SDP-PMD-IB1Z). When operated with the System Demonstration Platform, a LabView software GUI is provided enabling the user to perform analysis of the ADC's performance.

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EVAL-AD7685

AD7685 Evaluation Kit

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EVAL-AD7685

AD7685 Evaluation Kit

Product Detail

The EVAL-AD7685SDZ is a fully featured evaluation kit for the AD7685. This board operates in standalone mode or in conjunction with the System Development Platform, EVAL-SDP-CB1Z . When operated with the System Development Platform software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the System Development Platform . When operated in standalone mode the ADZS-BRKOUT-EX3 break out board is recommended for access to various control pins.

Tools & Simulations

Tools & Simulations 2

Reference Designs

Reference Designs 2

Galvanically Isolated, 2-Channel, Simultaneous Sampling, 16-Bit Analog-to-Digital Conversion System with Daisy Chain

Galvanically Isolated, 2-Channel, 16-Bit, Simultaneous Sampling, Daisy-Chained Data Acquisition System

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CN0194

Galvanically Isolated, 2-Channel, 16-Bit, Simultaneous Sampling, Daisy-Chained Data Acquisition System

CN0194

Circuits from the lab

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Galvanically Isolated, 2-Channel, 16-Bit, Simultaneous Sampling, Daisy-Chained Data Acquisition System

Features and Benefits

  • Simultaneous sampling
  • Isolated high speed analog to digital conversion
  • Level shift and attenuates +/- 10 V industrial signal
View Detailed Reference Design external link

Design & Integration Tools

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Parametric Measurement Unit and Supporting Comp

Parametric Measurement Unit and Supporting Components for ATE Applications Using the AD5522 PMU and the AD7685 16-Bit ADC

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CN0104

Parametric Measurement Unit and Supporting Components for ATE Applications Using the AD5522 PMU and the AD7685 16-Bit ADC

CN0104

Circuits from the lab

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Parametric Measurement Unit and Supporting Components for ATE Applications Using the AD5522 PMU and the AD7685 16-Bit ADC

Features and Benefits

  • Quad Parametic Measurement Unit Services 4 DUTs
  • Designed for ATE Applications
  • Optimized for High Precision
View Detailed Reference Design external link

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