The ISL267440 and ISL267450A are 10-bit and 12-bit, 1MSPS

sampling SAR-type ADCs featuring excellent linearity over supply

and temperature variations. These devices are drop-in

compatible with the AD7440 and AD7450A. The robust,

fully-differential input offers high impedance to minimize errors

due to leakage currents, and the specified measurement

accuracy is maintained with input signals up to the supply rails.

The reference accepts inputs from 0.1V to 2.2V for 3V operation

and 0.1V to 3.5V for 5V operation. This provides design flexibility

in a wide variety of applications. The ISL267440, ISL267450A

also feature up to 8kV Human Body Model ESD survivability.

The serial digital interface is SPI compatible and is easily

interfaced to popular FPGAs and microcontrollers. Power

dissipation is 8.5mW at a sampling rate of 1MSPS, and just 5μW

between conversions utilizing Auto Power-Down mode (with a 5V

supply). The ISL267440, ISL267450A are excellent solutions for

remote industrial sensors and battery-powered instruments.

The ISL267440, ISL267450A are available in an 8 lead MSOP

package, and are specified for operation over the Industrial

temperature range (–40°C to +85°C).

特性 Features

? Drop-in Compatible with AD7440, AD7450A

? Differential Input

? Simple SPI-compatible Serial Digital Interface

? Guaranteed No Missing Codes

? 1MHz Sampling Rate

? 3V or 5V Operation

? Low Operating Current

- 1.25mA at 1MSPS with 3V Supplies

- 1.70mA at 1MSPS with 5V Supplies

? Power-down Current between Conversions: 1μA

? Excellent Differential Non-Linearity

? Low THD: -83dB (typ)

? Pb-Free (RoHS Compliant)

? Available in MSOP Package

Applications

? Remote Data Acquisition

? Battery Operated Systems

? Industrial Process Control

? Energy Measurement

? Data Acquisition Systems

? Pressure Sensors

? Flow Controllers