GENERAL DESCRIPTION

The AD7622 is a 16-bit, 2 MSPS, charge redistribution SAR, fully differential, analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. The part 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) and a fast mode (normal) for asynchronous rate applications. The AD7622 is hardware factory calibrated and tested to ensure ac parameters, such as signal-to-noise ratio (SNR), in addition to the more traditional dc parameters of gain, offset, and linearity. The AD7622 is available in Pb-free only packages with operation specified from −40°C to +85°C.

FEATURES

Throughput

2 MSPS (wideband warp and warp mode)

1.5 MSPS (normal mode)

INL: ±0.5 LSB typical, ±1.5 LSB maximum (±23 ppm of FSR)

16-bit resolution with no missing codes

Dynamic range: 92.5 dB typical

SINAD: 91 dB minimum @ 20 kHz (VREF = 2.5 V)

THD: −115 dB typical @ 20 kHz (VREF = 2.5 V)

2.048 V internal reference: typical drift 8 ppm/°C; TEMP output

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

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

Single 2.5 V supply operation

Power dissipation

70 mW typical @ 2 MSPS with internal REF

2 μW in power-down mode

Pb-free, 48-lead LQFP and 48-lead LFCSP

Pin compatible with other PulSAR 48-lead ADCs

APPLICATIONS

Medical instruments

High speed data acquisition/high dynamic data acquisition

Digital signal processing

Spectrum analysis

Instrumentation

Communications

ATE

AD7653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AD7653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。