Description:

The GD30AD3382 is an 8-channel, 16-bit, chargeredistribution successive approximation register (SAR)analog-to-digital converter (ADC) powered by a singlepower supply, VDD. The GD30AD3382 contains all thecomponents for a multi-channel, low-power dataacquisition system, including a true 16-bit SAR ADC withno missing codes; an 8-channel low-crosstalkmultiplexer for configuring inputs as single-ended(referenced or not referenced to GND), differential, orbipolar inputs; an internal 4.096 V low-drift referencesource as well as output buffers and temperaturesensors; an optional single-pole filter; and a sequencerfor continuous scanning in channel order.GD30AD3382 uses a simple serial port interface (SPI)to write configuration registers and receive conversionresults. The SPI interface uses a separate power supplyVIO, the same as the host port power supply. Powerconsumption varies with throughput.The GD30AD3382 is packaged in a 20-pin QFN andoperates over the −40 °C to +125 °C temperature range.

Features:

• 16-bit resolution, no missing codes

• 8-channel multiplexer with selectable inputs

– Single-ended– Differential (relative to GND)

– Pseudo differential

• Throughput

– 250 KSPS (GD30AD3382-I02)

– 500 KSPS (GD30AD3382-I05)

• INL: ±0.5 LSB typical, ±1.5 LSB maximum(±23 ppm or FSR)

• Dynamic range: 93.3 dB

• SINAD: 91.5 dB@20 KHz

• THD: 97 dB@20 KHz

• Analog input range: 0V - VREF, VREF can beto VDD

• Various reference voltage types

– Internal 4.096 V

– External buffer (up to 4.096 V)

– External (highest VDD)

• Internal temperature sensor

• Channel sequencer, optional single-endedfilter, pipeline without delay Busy indicator,SAR structure

• Single power supply 5 V

– 1.8 V to 5 V logic interface

• Serial interface compatible with SPI,MICROWIRE, QSPI, DSP

• Power consumption

– 26 mW @ 500 kSPS

– 5.2 µW@ 100 SPS

• Standby current: 50 nA

• 20-lead 4 mm × 4 mm QFN package

Application:

• Battery-powered devices Medical instruments: ECG/EKG

• Mobile communications: GPS

• Power Line Monitoring Data Collection for Personal Digital Assistants

• Seismic Data Acquisition System Instrumentation

• Process Control