AD4695

RECOMMENDED FOR NEW DESIGNS

16-Bit, 16-Channel, 500 kSPS, Easy Drive Multiplexed SAR ADC

Data Sheet (Rev. B) Product Selection Table
Viewing:

Overview

  • Easy Drive
    • Reduced analog input and reference drive requirements
    • On-chip reference buffer (WLCSP only)
    • Overvoltage protection up to 5 mA on each analog input
    • Long acquisition phase, ≥71.5% (715 ns/1000 ns) of cycle time at 1 MSPS
  • High performance
    • Sample rate: 500 kSPS (AD4695) or 1 MSPS (AD4696)
    • INL: ±1.0 LSB maximum
    • Guaranteed 16-bit, no missing codes
    • SINAD: 93 dB typical, fIN = 1 kHz
    • Oversampled dynamic range: 111.2 dB, OSR = 64
  • Small footprint, high channel density
    • 32-lead 5 mm × 5 mm LFCSP
    • 36-ball 2.96 mm × 2.96 mm WLCSP
    • Easy Drive features support system level designs with fewer components
  • Enhanced digital functionality
    • First conversion accurate, no latency or pipeline delay
    • Fast conversion time and dual-/quad-SDO modes allow low SPI clock rates
    • Customizable channel sequencer
    • On-chip oversampling and decimation
    • Threshold detection alerts
    • Offset and gain correction
    • Autonomous conversion (autocycle) mode
    • 1.14 V to 1.98 V logic SPI
  • Low power
    • 8 mW at fS = 1 MSPS and 4 mW at fS = 500 kSPS
    • 4 μW standby power dissipation with the internal LDO disabled
    • Internal LDO enables 2.7 V to 5.5 V, single analog supply operation
  • Wide operating temperature range: −40°C to +125°C

The AD4695/AD4696 are compact, high accuracy, low power, 16-channel, 16-bit, 500 kSPS/1 MSPS, multiplexed input precision, successive approximation register (SAR) analog-to-digital converters (ADCs) with Easy Drive features and extensive digital functionality.

The AD4695/AD4696 are optimal for use in space constrained, multichannel, precision data acquisition systems and monitoring circuits. The AD4695/AD4696 feature a true 16-bit SAR ADC core with no missing codes, a 16-channel, low crosstalk multiplexer, a flexible channel sequencer, overvoltage protection clamp circuits on each analog input, on-chip oversampling and decimation, threshold detection and alert indicators, and an autonomous conversion (autocycle) mode.

The AD4695/AD4696 Easy Drive features relax the drive requirements of the analog front end (AFE) and reference circuitry. Analog input high-Z mode and reference input high‑Z mode simplify system designs, reduce component count, and increase channel density by removing the need for dedicated high speed ADC drivers and reference buffers. The WLCSP option of the AD4695/AD4696 includes an internal reference buffer, which provides a true, buffered reference input.

Input overvoltage protection clamps on each analog input protect the AD4695/AD4696 from overvoltage events and prevent overvoltage events on one channel from degrading performance on other channels (see Figure 27 in the data sheet).

Advanced digital functionality makes the AD4695/AD4696 compatible with a variety of low power digital hosts. The low serial peripheral interface (SPI) clock rate requirements, on-chip customizable channel sequencers, and oversampling and decimation reduce the burden on the digital host system. Autocycle mode and threshold detection features enable low power, interrupt driven firmware design by performing conversions autonomously and generating alerts based on channel specific threshold limits.

The AD4695/AD4696 are available in a 5 mm × 5 mm 32-lead lead frame chip scale package (LFCSP) and a 2.96 mm × 2.96 mm 36-ball wafer level chip scale package (WLCSP) with operation specified from −40°C to +125°C.

APPLICATIONS

  • Photodiode monitoring
  • Medical instrumentation
  • Vital signs monitoring
  • Electronic test and measurement
  • Automated test equipment
  • Instrumentation and process control
  • Battery-powered equipment
AD4695
16-Bit, 16-Channel, 500 kSPS, Easy Drive Multiplexed SAR ADC
AD4695/AD4696 Functional Block Diagram AD4695/AD4696 Pin Configuration AD4695/AD4696 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Mbed Support 3

Hardware Ecosystem
Modal heading
Modify Design LTspice Simulation
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • AD4695

IBIS Model 1

Signal Chain Designer

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

Open Tool
LTspice

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.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
EVAL-AD4696

Evaluating the AD4696 16-Channel, 16-Bit, 1 MSPS Multiplexed SAR ADC

Buy Now View Details

Features and Benefits

  • Full featured evaluation board for the AD4696
  • 2 channels customizable for external connections and 14 channels for on-board dc voltages
  • On-board reference circuitry
  • ACE plugin available for device configuration and performance evaluation
  • FMC compatible
  • System demonstration platform (SDP-H1) compatible

Product Details

The EVAL-AD4696FMCZ is designed to demonstrate AD4696 performance and provide access to its many configuration options via an easy to use ACE plugin graphical interface. The AD4696 is a 16-channel, 16-bit, 1 MSPS, multiplexed successive approximation register (SAR) analog-to-digital converter (ADC) that enables high performance data acquisition of multiple signals in a small form factor. The AD4696 employs easy drive features and on-chip channel sequencing that simplify hardware and software designs and allow it to fit into a variety of space constrained precision multichannel applications.

The EVAL-AD4696FMCZ allows users to quickly evaluate the performance of the AD4696 with no or minimal hardware modifications. The hardware includes two externally driven analog input channels for evaluating ac performance and 14 channels with dc levels generated on board for evaluating dc and settling performance. The externally driven channels have configurable drive circuitry and interface with precision signal generators via SMA connectors.

The AD4696 ACE plugin communicates with the EVAL-AD4696FMCZ hardware through the EVAL-SDP-CH1Z controller board. The software allows AD4696 device configuration via a register map view and easy to use GUIs. The software also enables performing analog-to-digital conversions and provides time and frequency domain analysis tools for quick evaluation of the AD4696.

More detailed feature descriptions and device specifications are provided in the AD4696 data sheet and must be consulted in conjunction with the user guide when using the EVAL-AD4696FMCZ. Full details on the EVAL-SDP-CH1Z are available on the SDP-H1 product page.

EVAL-AD4696
Evaluating the AD4696 16-Channel, 16-Bit, 1 MSPS Multiplexed SAR ADC
AD4696 Evaluation Board AD4696 Evaluation Board - Top View AD4696 Evaluation Board - Bottom View

Latest Discussions

32 Weeks Ago
Re: Read is unstable or unrepeatible
47 Weeks Ago
AD4695 Conversion Mode
48 Weeks Ago
Reading wrong adc value sometimes - ad4695
View related discussion on EngineerZone®

Recently Viewed