GENERAL DESCRIPTION

The AD7708/AD7718 are complete analog front-ends for low frequency measurement applications. The AD7718 contains a 24-bit Σ-? ADC with PGA and can be configured as 4/5 fully-differential input channels or 8/10 pseudo-differential input channels. Two pins on the device are configurable as analog inputs or reference inputs. The AD7708 is a 16-bit version of the AD7718. Input signal ranges from 20 mV to 2.56 V can be directly converted using these ADCs. Signals can be converted directly from a transducer without the need for signal conditioning.

FEATURES

8-/10-Channel, High Resolution Σ-? ADCs

AD7708 Has 16-Bit Resolution

AD7718 Has 24-Bit Resolution

Factory-Calibrated

Single Conversion Cycle Setting

Programmable Gain Front End

Simultaneous 50 Hz and 60 Hz Rejection

VREF Select? Allows Absolute and Ratiometric

Measurement Capability

Operation Can Be Optimized for

Analog Performance (CHOP = 0) or

Channel Throughput (CHOP = 1)

INTERFACE

3-Wire Serial

SPITM, QSPITM, MICROWIRETM, and DSP-Compatible

Schmitt Trigger on SCLK

POWER

Specified for Single 3 V and 5 V Operation

Normal: 1.28 mA Typ @ 3 V

Power-Down: 30 μA (32 kHz Crystal Running)

On-Chip Functions

Rail-to-Rail Input Buffer and PGA

2-Bit Digital I/O Port

APPLICATIONS

Industrial Process Control

Instrumentation

Pressure Transducers

Portable Instrumentation

Smart Transmitters

AD7718BRU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AD7718BRU模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對(duì)模擬信號(hào)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(hào)。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。