GENERAL DESCRIPTION

The AD7192 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can be interfaced directly to the ADC.

FEATURES

RMS noise: 11 nV @ 4.7 Hz (gain = 128)

15.5 noise-free bits @ 2.4 kHz (gain = 128)

Up to 22 noise-free bits (gain = 1)

Offset drift: 5 nV/°C

Gain drift: 1 ppm/°C

Specified drift over time

2 differential/4 pseudo differential input channels

Automatic channel sequencer

Programmable gain (1 to 128)

Output data rate: 4.7 Hz to 4.8 kHz

Internal or external clock

Simultaneous 50 Hz/60 Hz rejection

4 general-purpose digital outputs

Power supply

AVDD: 3 V to 5.25 V

DVDD: 2.7 V to 5.25 V

Current: 4.35 mA

Temperature range: –40°C to +105°C

Package: 24-lead TSSOP

INTERFACE

3-wire serial

SPI, QSPI?, MICROWIRE?, and DSP compatible

Schmitt trigger on SCLK

APPLICATIONS

Weigh scales

Strain gage transducers

Pressure measurement

AD7192屬于集成電路（IC） > 模數轉換器（ADC）。亞德諾半導體技術有限公司制造生產的AD7192模數轉換器（ADC）模數轉換器（ADC、A/D 或 A 轉 D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉換為數字信號。一般來說，數字輸出是二進制補碼二進制數，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數轉換器可按照位數、采樣率、輸入數、接口、轉換器數和架構（例如自適應增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。