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

AD7674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AD7674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。