AD7986BCPZ-RL7

模数转换器 - ADC 18-Bit 2MSPS 15mW

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