GENERAL DESCRIPTION

The AD7612 is a 16-bit charge redistribution successive approximation register (SAR), architecture analog-to-digital converter (ADC) fabricated on Analog Devices, Inc.’s iCMOS high voltage process. The device is configured through hardware or via a dedicated write only serial configuration port for input range and operating mode. The AD7612 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.

FEATURES

Multiple pins/software programmable input ranges: 5 V, 10 V, ±5 V, ±10 V

Pins or serial SPI®-compatible input ranges/mode selection

Throughput

750 kSPS (warp mode)

600 kSPS (normal mode)

500 kSPS (impulse mode)

INL: ±0.75 LSB typical, ±1.5 LSB maximum (±23 ppm of FSR)

16-bit resolution with no missing codes

SNR: 92 minimum (5 V) @ 2 kHz, 94 dB typical (±10 V) @ 2 kHz

THD: −107 dB typical

iCMOS™ process technology

5 V internal reference: typical drift 3 ppm/°C; TEMP output

No pipeline delay (SAR architecture)

Parallel (16- or 8-bit bus) and serial 5 V/3.3 V interface

SPI-/QSPI™-/MICROWIRE™-/DSP-compatible

Power dissipation: 190 mW @ 750 kSPS

Pb-free, 48-lead LQFP and LFCSP (7 mm × 7 mm) packages

APPLICATIONS

Process control

Medical instruments

High speed data acquisition

Digital signal processing

Instrumentation

Spectrum analysis

ATE