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

AD7621AST属于集成电路（IC） > 模数转换器（ADC）。亚德诺半导体技术有限公司制造生产的AD7621AST模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。