AD7703 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD7703
Manufacturer

ADI
ChipWorker Part#

CW430800992
Description

20Bit Sigma-Delta ADC
Documentation

Datasheet

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AD7703 Specifications

Attribute	Attribute Value

Part Number	AD7703
Manufacturer	ADI
ChipWorker Part#	CW430800992
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
The AD7703 is a 20-bit ADC which uses a sigma delta conversion technique. The analog input is continuously sampled by an analog modulator whose mean output duty cycle is proportional to the input signal. The modulator output is processed by an on-chip digital filter with a six-pole Gaussian response, which updates the output data register with 20-bit binary words at word rates up to 4kHz. The sampling rate, filter corner frequency and output word rate are set by a master clock input that may be supplied externally, or by an on-chip gate oscillator.
The inherent linearity of the ADC is excellent, and endpoint accuracy is ensured by self-calibration of zero and full scale which may be initiated at any time. The self-calibration scheme can also be extended to null system offset and gain errors in the input channel.
The output data is accessed through a serial port, which has two synchronous modes suitable for interfacing to shift registers or the serial ports of industry standard microcontrollers.
CMOS construction ensures low power dissipation, and a power down mode reduces the idle power consumption to only 10µW.
### Features and Benefits
Monolithic 16-Bit ADC
0.0015% Linearity Error
On-Chip Self-Calibration Circuitry
Programmable Low-Pass Filter
0.1 Hz to 10 Hz Corner Frequency
0 V to +2.5 V or ±2.5 V Analog Input Range
4 kSPS Output Data Rate
Flexible Serial Interface
Ultralow Power

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