Datasheet Analog Devices AD7793 — 数据表

3-Channel, Low Noise, Low Power, 16-/24-Bit
∑-Δ ADC with On-Chip In-Amp and Reference AD7792/AD7793
Up to 23 bits effective resolution
RMS noise
40 nV @ 4.17 Hz
85 nV @ 16.7 Hz
Current: 400 μA typical
Power-down: 1 μA maximum
Low noise programmable gain instrumentation amp
Band gap reference with 4 ppm/°C drift typical
Update rate: 4.17 Hz to 470 Hz
3 differential inputs
Internal clock oscillator
Simultaneous 50 Hz/60 Hz rejection
Programmable current sources
On-chip bias voltage generator
Burnout currents
Power supply: 2.7 V to 5.25 V
-40°C to +105°C temperature range
Independent interface power supply
16-lead TSSOP package
Interface
3-wire serial …

Key Sheet AD7792/AD7793
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 AD7792/AD7793—3-Channel, Low Noise, Low Power,
16-/24-Bit Sigma-Delta ADCs with On-Chip In-Amp and Reference
GND AVDD REFIN(+)/AIN3(+) REFIN(-)/AIN3(-) VBIAS BAND GAP
REFERENCE
GND AVDD
AIN1(+)
AIN1(-)
AIN2(+)
AIN2(-) MUX
BUF Σ-Δ
ADC IN-AMP SERIAL
INTERFACE
AND
CONTROL
LOGIC AVDD GND DIN
SCLK
CS
DVDD AD7792: 16-BIT
AD7793: 24-BIT INTERNAL
CLOCK IOUT2 11263-001 IOUT1 DOUT/RDY CLK Figure 1. Functional Block Diagram GENERAL DESCRIPTION FEATURES AND BENEFITS This key sheet provides users with an overview of the AD7792/
AD7793. Key attributes of the parts include the following: The AD7792/AD7793 offer the following features and benefits: 1 • • •
• …