ADS1250U/1K

20 位数据采集系统模数转换器 16-SOIC

DESCRIPON

The ADS1250 is a precision, wide dynamic range, delta-sigma, analog-to-digital converter with 20-bit resolution operating from a single +5V supply. The delta-sigma architecture is used for wide dynamic range and to guarantee 20 bits of no missing code performance. An effective resolution of 18 bits 2.8ppm of rms noise is achieved for conversion rates up to 25kHz. The dynamic range of the converter is further increased by providing a low-noise Programmable Gain Amplifier PGA with gain stages of 1, 2, 4, or 8 for low level input signals.

The ADS1250 is designed for high-resolution measurement applications in cardiac diagnostics, smart transmitters, industrial process control, weigh scales, chromatography and portable instrumentation. The converter includes a flexible synchronous serial interface and offers a three-wire control mode for low-cost isolation.

The ADS1250 is a single-channel converter and is offered in an SOL-16 package.

FEATURES

● 20 BITS NO MISSING CODES

● 18 BITS EFFECTIVE RESOLUTION UP TO 25kHz DATA RATE

● LOW NOISE: 2.8ppm at PGA = 1

● DIFFERENTIAL INPUTS

● INL: 0.002% MAX

● PROGRAMMABLE FULL SCALE

● I/O CONTROLLED PGA: 1, 2, 4, 8

● EXTERNAL REFERENCE

APPLICATIONS

● CARDIAC DIAGNOSTICS

● DIRECT THERMOCOUPLE INTERFACE

● BLOOD ANALYSIS

● INFRARED PYROMETER

● LIQUID/GAS CHROMATOGRAPHY

● PRECISION PROCESS CONTROL