GENERAL DESCRIPTION

The AD7679 is an 18-bit, 570 kSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates on a single 5 V power supply. The part contains a high speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports.

The part is available in a 48-lead LQFP or 48-lead LFCSP with operation specified from –40°C to +85°C.

FEATURES

18-bit resolution with no missing codes

No pipeline delay (SAR architecture)

Differential input range: ±VREF (VREF up to 5 V)

Throughput: 570 kSPS

INL: ±2.5 LSB max (±9.5 ppm of full scale)

Dynamic range : 103 dB typ (VREF = 5 V)

S/(N+D): 100 dB typ @ 2 kHz (VREF = 5 V)

Parallel (18-,16-, or 8-bit bus) and serial 5 V/3 V interface

SPI?/QSPI?/MICROWIRE?/DSP compatible

On-board reference buffer

Single 5 V supply operation

Power dissipation: 76 mW @ 500 kSPS

150 μW @ 1 kSPS

48-lead LQFP or 48-lead LFCSP package

Pin-to-pin compatible upgrade of AD7674/AD7676/AD7678

APPLICATIONS

CT scanners

High dynamic data acquisition

Geophone and hydrophone sensors

Σ-Δ replacement (low power, multichannel)

Instrumentation

Spectrum analysis

Medical instruments

AD7677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AD7677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。