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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners

12-bit, 250kSPS Low-power ADCs with Single-ended

and Differential Inputs and Multiple Input Channels

ISL26320, ISL26321, ISL26322,

ISL26323, ISL26324, ISL26325,

ISL26329

The ISL26320/21/22/23/24/25/29 family of sampling

SAR-type ADCs feature excellent linearity over supply and

temperature variations, and offer versions with 1-, 2-, 4- and

8-channel single-ended inputs, and 1-, 2- and 4-channel

differential inputs.

A proprietary input multiplexer and combination buffer amplifier

reduces the input drive requirements, resulting in lower cost and

reduced board space. Specified measurement accuracy is

maintained with input signals up to VDD.

Members of the ISL26320/21/22/23/24/25/29 family of

Low-Power ADCs offer pinout intercompatibility, differing only in

the analog inputs, to support quick replication of proven layouts

across multiple design platforms.

The serial digital interface is SPI compatible and is easily

interfaced to popular FPGAs and microcontrollers. Power

consumption is limited to 15mW at a sampling rate of 250kSPS,

and an operating current of just 8μA typical between

conversions, when configured for Auto Powerdown mode.

The ISL26320/21/22/23/24/25/29 feature up to 5kV Human

Body Model ESD survivability and are available in the popular

SOIC and TSSOP packages. Performance is specified for

operation over the full industrial temperature range (-40°C to

+125°C).

Features

• Pin-compatible Family Allows Easy Design Upgrades

• Excellent Differential Non-Linearity (0.7LSB max)

• Low THD: -86dB (typ)

• Simple SPI-compatible Serial Digital Interface

• Low 3mA Operating Current

• Power-down Current between Conversions 8μA (typ)

• +5.25V to +2.7V Supply

• Excellent ESD Survivability: 5kV HBM, 350V MM, 2kV CDM

Applications

• Industrial Process Control

• Energy Measurement

• Multichannel Data Acquisition Systems

• Pressure Sensors

• Flow Controllers

FIGURE 1. FUNCTIONAL BLOCK DIAGRAM

June 8, 2012

FN8273.0