GENERAL DESCRIPTION

The AD7713 is a complete analog front end for low frequency measurement applications. The device accepts low level signals directly from a transducer or high level signals (4
VREF) and outputs a serial digital word. It employs - conversion technique to realize up to 24 bits of no missing codes performance. The input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via the on-chip control register, allowing adjustment of the filter cutoff and settling time.

FEATURES

Charge Balancing ADC

24 Bits No Missing Codes

±0.0015 Nonlinearity

3-Channel Programmable Gain Front End

Gains from 1 to 128

2 Differential Inputs

1 Single-Ended High Voltage Input

Low-Pass Filter with Programmable Filter Cutoffs

Ability to Read/Write Calibration Coefficients

Bidirectional Microcontroller Serial Interface

Single-Supply Operation

Low Power (3.5 mW typ) with Power-Down Mode (150 μW typ)

APPLICATIONS

Loop Powered (Smart) Transmitters

RTD Transducers

Process Control

Portable Industrial Instruments

AD7713屬于集成電路（IC） > 模數(shù)轉(zhuǎn)換器（ADC）。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7713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。