AD7986集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

AD7986属于集成电路（IC）的模数转换器（ADC）。由亚德诺半导体技术有限公司制造生产的AD7986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。

GENERAL DESCRIPTION

The AD7986 is an 18-bit, 2 MSPS successive approximation, analog-to-digital converter (ADC). It contains a low power, high speed, 18-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7986 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. It features a very high sampling rate turbo mode (TURBO = high) and a reduced power normal mode (TURBO = low) for low power applications where the power is scaled with the throughput.

FEATURES

18-bit resolution with no missing codes

Throughput: 2 MSPS (TURBO = high), 1.5 MSPS (TURBO = low)

Low power dissipation

15 mW at 2 MSPS, with external reference

26 mW at 2 MSPS with internal reference

INL: ±1 LSB typical, ±2.5 LSB maximum

SNR

95.5 dB, with on-chip reference

97.0 dB, with external reference

4.096 V internal reference: typical drift of 10 ppm/°C

True differential analog input voltage range: ±VREF

0 V to VREFwith VREFup to 5.0 V

Allows use of any input range

No pipeline delay

Logic interface: 1.8 V/2.5 V/2.7 V

Serial interface: SPI/QSPI™/MICROWIRE™/DSP compatible

Ability to daisy-chain multiple ADCs with busy indicator

20-lead 4 mm × 4 mm LFCSP (QFN)

APPLICATIONS

Battery-powered equipment

Data acquisition systems

Medical instruments

Seismic data acquisition systems