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GENERAL DESCRIPTION

The AD7952 is a 14-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 AD7952 contains a high speed 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. A falling edge on CNVST samples the fully differential analog inputs on IN+ and IN?.

The AD7952 features four different analog input ranges and three different sampling modes: warp mode for the fastest throughput, normal mode for the fastest asynchronous throughput, and impulse mode where power is scaled with throughput. Operation is specified from ?40°C to +85°C.

FEATURES

Multiple pins/software-programmable input ranges

+5 V (10 V p-p), +10 V (20 V p-p), ±5 V (20 V p-p),

±10 V (40 V p-p)

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

Throughput

1 MSPS (warp mode)

800 kSPS (normal mode)

670 kSPS (impulse mode)

14-bit resolution with no missing codes

INL: ±0.3 LSB typical, ±1 LSB maximum (±61 ppm of FSR)

SNR: 85 dB @ 2 kHz

iCMOS? process technology

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

No pipeline delay (SAR architecture)

Parallel (14- or 8-bit bus) and serial 5 V/3.3 V interface

SPI-/QSPI?-/MICROWIRE?-/DSP-compatible

Power dissipation

235 mW @ 1 MSPS

10 mW @ 1 kSPS

48-lead LQFP and 48-lead LFCSP (7 mm × 7 mm)

APPLICATIONS

Process controls

Medical instruments

High speed data acquisition

Digital signal processing

Instrumentation

Spectrum analysis

ATE