GENERAL DESCRIPTION

The AD7623 is a 16-bit, 1.33 MSPS, charge redistribution SAR, fully differential analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. It 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. Power consumption is automatically scaled with throughput, making it ideal for battery-powered applications. It is available in 48-lead, low profile quad flat package (LQFP) and a lead frame chip-scale (LFCSP_VQ) package. Operation is specified from ?40°C to +85°C.

FEATURES

Throughput: 1.33 MSPS

2.048 V internal reference

Differential input range: ±VREF (VREF up to 2.5 V)

INL: ±1 LSB typical

16-bit resolution with no missing codes

SINAD: 88 dB typical @ 100 kHz

THD: ?97 dB typical @ 100 kHz

No pipeline delay (SAR architecture)

Parallel (16- or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface

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

2.5 V single-supply operation

Power dissipation: 45 mW typical @ 1.33 MSPS

48-lead LQFP and LFCSP_VQ packages

Speed upgrade of the AD7677

APPLICATIONS

Medical instruments

High speed data acquisition

Digital signal processing

Communications

Instrumentation

Spectrum analysis

ATE