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GENERAL DESCRIPTION

The AD7683 is a 16-bit, charge redistribution, successive approximation, PulSAR? analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.7 V and 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes (B grade), an internal conversion clock, and a serial, SPI-compatible interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CSfalling edge, it samples an analog input, +IN, between 0 V to REF with respect to a ground sense, –IN. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Its power scales linearly with throughput. The AD7683 is housed in an 8-lead MSOP or an 8-lead QFN

(LFCSP) package, with an operating temperature specified from ?40°C to +85°C.

FEATURES

16-bit resolution with no missing codes

Throughput: 100 kSPS

INL: ±1 LSB typical, ±3 LSB maximum

Pseudo differential analog input range

0 V to VREFwith VREFup to VDD

Single-supply operation: 2.7 V to 5.5 V

Serial interface SPI/QSPI/MICROWIRE/DSP compatible

Power dissipation: 4 mW @ 5 V, 1.5 mW @ 2.7 V,

150 μW @ 2.7 V/10 kSPS

Standby current: 1 nA

8-lead packages:

MSOP

3 mm × 3 mm QFN (LFCSP) (SOT-23 size)

Improved second source to ADS8320 and ADS8325

APPLICATIONS

Battery-powered equipment

Data acquisition

Instrumentation

Medical instruments

Process control