AD7621AST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AD7621AST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。

GENERAL DESCRIPTION

The AD7621 is a 16-bit, 3 MSPS, charge redistribution SAR, fully differential analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. It contains a high speed 16-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. It features two very high sampling rate modes (wideband warp and warp), a fast mode (normal) for asynchronous rate applications, and a reduced power mode (impulse) for low power applications where the power is scaled with the throughput. Operation is specified from ?40°C to +85°C.

FEATURES

Throughput

3 MSPS (wideband warp and warp mode)

2 MSPS (normal mode)

1.25 MSPS (impulse mode)

2.048 V internal reference

Differential input range: ±VREF (VREF up to 2.5 V)

INL: ±2 LSB maximum, ±1 LSB typical

16-bit resolution with no missing codes

SINAD: 89 dB typical @ 100 kHz

THD: ?101 dB typical @ 100 kHz

No pipeline delay (SAR architecture)

Parallel (16- or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface

SPI?-/QSPI?-/MICROWIRE?-/DSP-compatible

2.5 V single-supply operation

Power dissipation: 65 mW typical @ 3 MSPS

48-lead LQFP and 48-lead LFCSP packages

Speed upgrade of the AD7677

APPLICATIONS

Medical instruments

High speed data acquisition

Digital signal processing

Communications

Instrumentation

Spectrum analysis

ATE