AD4691

RECOMMENDED FOR NEW DESIGNS

16-Channel, Easy Drive Multiplexed SAR ADC with Averaging Filters Per Channel

Data Sheet (Rev. 0) Product Selection Table

Part Models: 3
1ku List Price: price unavailable

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Overview

Easy Drive features enable compact system designs
- Precharge buffers reduce analog input and reference circuit drive requirements
- On-chip reference buffer (WLCSP only)
Small footprint, big performance
- Sample rate: 500kSPS (AD4691) and 1MSPS (AD4692)
- INL: ±0.85 LSB maximum
- Guaranteed 16-bit, no missing codes
- First conversion accurate
- SINAD: 93dB typical, f_IN = 1kHz
- 14.6mW at f_S = 1MSPS and 7.3mW at f_S = 500kSPS
- 32-lead 5mm × 5mm LFCSP or 36-ball 2.96mm × 2.96mm WLCSP

Enhanced digital functionality
- Averaging filters per channel
- Customizable channel sequencer
- Interleaved channel sampling
- Autonomous and burst sampling modes
- 4-wire SPI compatible with 1.2V and 1.8V logic
Wide operating temperature range: −40°C to +125°C

The AD4691/AD4692 are compact, high accuracy, 16-channel, 16- bit successive approximation register (SAR) analog-to-digital converters (ADCs) optimized for high-density multichannel precision data acquisition solutions. The AD4691/AD4692 combine precision performance with Easy Drive features and flexible digital processing to ensure compatibility with space-constrained analog front-end (AFE) designs and low-power digital hosts.

The AD4691/AD4692 Easy Drive features broaden the selection of compatible amplifiers and voltage references. The precharge buffers enable smaller and lower power AFE designs by significantly reducing input voltage and current transients that typically force AFEs to include high-bandwidth ADC driver amplifiers per channel. The WLCSP model also includes an integrated reference buffer which provides a true, buffered reference input.

The AD4691/AD4692 digital features and serial interface are optimized for use with low-power or power-cycled microcontrollers. The AD4691/AD4692 include averaging filters per channel and a customizable channel sequencer, which combined enable on-chip noise filtering with channel-independent averaging ratios. An integrated burst sampling timer enables autonomous and burst sampling schemes to perform conversions with minimal digital resources. Device configuration and ADC data readback are supported via a robust, 4-wire serial peripheral interface (SPI) with optional cyclic redundancy check (CRC).

The AD4691/AD4692 are available in a 5mm × 5mm, 32-lead lead frame chip scale package (LFCSP) and a 2.96mm × 2.96mm, 36-ball wafer level chip scale package (WLCSP) with operation specified from −40°C to +125°C.

APPLICATIONS

Optical power monitoring
Medical instrumentation
Electronic test and measurement
Automated test equipment
Battery-powered equipment

Part Models: 3
1ku List Price: price unavailable

Documentation

Data Sheet 1

AD4691/AD4692: 16-Channel, Easy Drive Multiplexed SAR ADC with Averaging Filters Per Channel Data Sheet (Rev.0) 02/27/2026

User Guide 1

EVAL- AD4692-ARDZ User Guide: Evaluating the AD4692 Family of Easy Drive Multiplexed SAR ADCs with Averaging Filters per Channel (Rev.0) 02/27/2026

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD4691BCBZ-RL7	36-Ball WLCSP (2.96mm x 2.96mm x 0.50mm)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
AD4691BCPZ	32-Lead LFCSP (5mm x 5mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
AD4691BCPZ-RL7	32-Lead LFCSP (5mm x 5mm w/ EP)	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
AD4696	RECOMMENDED FOR NEW DESIGNS	16-Bit, 16-Channel, 1 MSPS, Easy Drive Multiplexed SAR ADC
AD4695	RECOMMENDED FOR NEW DESIGNS	16-Bit, 16-Channel, 500 kSPS, Easy Drive Multiplexed SAR ADC
AD7689	PRODUCTION	16-Bit, 8-Channel, 250 kSPS PulSAR ADC

Evaluation Kits

Evaluating the AD4692 Family of Easy Drive Multiplexed SAR ADCs with Averaging Filters per Channel

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Features and Benefits

Full featured evaluation board for the AD4692 family of multiplexed SAR ADCs
- Demonstrates performance and functionality of the AD4691, AD4692, AD4693, and AD4694
Two single-ended input channels available through SMA connectors for AC analysis
- Six channels for on-board DC voltage analysis
On-board reference circuitry and power tree designed for a USB power solution
ACE plugin available for device configuration and data analysis in the time and frequency domains
Compatible with SDP-K1 and other Arduino form factor controller boards

Product Details

The EVAL-AD4692-ARDZ evaluation board is designed to demonstrate the performance of the AD4692 family of analog-to-digital converters (ADCs) and to provide access to included configuration options available in the ACE plugin graphical user interface (GUI). The AD4692 family are compact, high accuracy, 16-bit Easy Drive successive approximation register (SAR) ADCs optimized for high-density multichannel precision data acquisition solutions. This document includes a quick-start guide for using the EVAL-AD4692- ARDZ evaluation board with the EVAL-SDP-CK1Z (SDP-K1) controller board. Refer to the Hardware Setup section and Evaluation Board Software section for detailed instructions on setting up the hardware and software for board evaluation.

The SDP-K1 is the primary controller board for the EVAL-AD4692- ARDZ. The EVAL-AD4692-ARDZ evaluation board conforms to the Arduino® Uno Shield mechanical and electrical standards to interface with the SDP-K1 and various software development kits from other manufacturers.

The EVAL-AD4692-ARDZ evaluation solution includes the AD4692 industrial I/O (IIO) firmware application drivers for device configuration and ADC data capture and the AD4692 ACE plugin GUI for performance evaluation.

The EVAL-AD4692-ARDZ can also be used to evaluate the performance of the AD4691, AD4693, and AD4694 by limiting the sample rate and number of channels used in the evaluation software. Consult the data sheet for each product in conjunction with this user guide for more information.

Resources

EVAL- AD4692-ARDZ User Guide: Evaluating the AD4692 Family of Easy Drive Multiplexed SAR ADCs with Averaging Filters per Channel (Rev.0)
2/27/2026

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