AD7790 PDF Datasheet
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Description
This is 16-Bit Buffered Sigma-Delta ADC. Data Sheet
FEATURES
Power Supply: 2.5 V to 5.25 V operation Normal: 75 μA maximum Power-down: 1 μA maximum RMS noise: 1.1 μV at 9.5 H- update rate 16-bit p-p resolution Integral nonlinearity: 3.5 ppm typical Simultaneous 50 H- and 60 H- rejection Internal clock oscillator Programmable gain amplifier Rail-to-rail input buffer VDD monitor channel Temperature range: 40°C to +105°C 10-lead MSOP
Low Power, 16-Bit Buffered Sigma-Delta ADC AD7790
FUNCTIONAL BLOCK DIAGRAM
GND VDD REFIN
VDD
INTERNAL CLOCK
AIN
BUF
16-BIT ADC
DIGITAL PGA
SERIAL INTERFACE
GND
AD7790
03538-0-001
Figure 1.
GENERAL DESCRIPTION
The AD7790 is a low power, complete analog front end for low frequency measurement applications. It contains a low noise 16-bit ∑-Δ ADC with one differential input that can be buffered or unbuffered along with a digital PGA, which allows gains of 1, 2, 4, and 8. The device operates from an internal clock. Therefore, the user does not have to supply a clock source to the device. The.