Datasheet Analog Devices AD7790 — 数据表

Low Power, 16-Bit
Buffered Sigma-Delta ADC
AD7790 Data Sheet FUNCTIONAL BLOCK DIAGRAM 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 Hz update rate
16-bit p-p resolution
Integral nonlinearity: 3.5 ppm typical
Simultaneous 50 Hz and 60 Hz 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 GND REFIN VDD INTERNAL
CLOCK BUF AIN GND 16-BIT
ADC DIGITAL
PGA SERIAL
INTERFACE AD7790
03538-0-001 Figure 1. GENERAL DESCRIPTION INTERFACE
3-wire serial …

Key Sheet AD7790 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Highlights of the AD7790—Low Power, 16-Bit, Buffered Sigma-Delta ADC
GND VDD REFIN VDD INTERNAL
CLOCK GND 16-BIT
ADC DIGITAL
PGA SERIAL
INTERFACE 11264-001 BUF AIN AD7790
Figure 1. Functional Block Diagram GENERAL DESCRIPTION FEATURES AND BENEFITS This key sheet provides users with an overview of the AD7790.
Key attributes of the part include the following: The AD7790 offers the following features and benefits: 1 • • •
•
•
• 1 Designed for the measurement of wide dynamic range, low
frequency signals, such as those in pressure transducers, weigh
scales, and temperature measurement applications.
Low power, flexible, high performance, low noise, 16-bit
sigma-delta (Σ-Δ) ADC suitable for converting low input
bandwidth analog signals with a fully flexible output data
rate (ODR) between 9.5 SPS and 120 SPS.
Single fully differential analog channel with ultralow power
consumption.
With an ODR of 9.5 SPS, the AD7790 boasts an rms noise
of 1.1 µV.
User friendly, with the part being fully configurable over a
4-wire serial interface. …