AD7719集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）規(guī)格書PDF中文資料

AD7719屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7719模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對模擬信號進(jìn)行采樣，例如由麥克風(fēng)采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號。一般來說，數(shù)字輸出是二進(jìn)制補(bǔ)碼二進(jìn)制數(shù)，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(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進(jìn)行選擇。

GENERAL DESCRIPTION

The AD7719 is a complete analog front end for low frequency measurement applications. It contains two high resolution Σ-? ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port, and temperature sensor.

FEATURES

HIGH RESOLUTION Σ-Δ ADCs

2 Independent ADCs (16- and 24-Bit Resolution)

Factory-Calibrated (Field Calibration Not Required)

Output Settles in 1 Conversion Cycle (Single

Conversion Mode)

Programmable Gain Front End

Simultaneous Sampling and Conversion of 2

Signal Sources

Separate Reference Inputs for Each Channel

Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz

Update Rate

ISOURCE Select?

24-Bit No Missing Codes—Main ADC

13-Bit p-p Resolution @ 20 Hz, 20 mV Range

18-Bit p-p Resolution @ 20 Hz, 2.56 V Range

INTERFACE

3-Wire Serial

SPI?, QSPI?, MICROWIRE?, and DSP Compatible

Schmitt Trigger on SCLK

POWER

Specified for Single 3 V and 5 V Operation

Normal: 1.5 mA Typ @ 3 V

Power-Down: 10 μA (32 kHz Crystal Running)

ON-CHIP FUNCTIONS

Rail-Rail Input Buffer and PGA

4-Bit Digital I/O Port

On-Chip Temperature Sensor

Dual Switchable Excitation Current Sources

Low-Side Power Switches

Reference Detect Circuit

APPLICATIONS

Sensor Measurement

Temperature Measurement

Pressure Measurement

Weigh Scales

Portable Instrumentation

4 to 20 mA Transmitters