1

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, ISL26321, ISL26322, ISL26323, ISL26324,

ISL26325 and ISL26329 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

Members of the The ISL26320, ISL26321, ISL26322, ISL26323,

ISL26324, ISL26325 and ISL26329 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 Power-down mode.

The ISL26320, ISL26321, ISL26322, ISL26323, ISL26324,

ISL26325 and ISL26329 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

OSC

ADC

MUX

SPI

POR

ANALOG INPUTS

DIFFERENTIAL/

SINGLE-ENDED

VREF

VDD

CNV

SCLK

SDO

SDI

GND

BUFFER

September 5, 2013

FN8273.1

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.