AD7891
AD7891 is 12-Bit High Speed Data Acquisition System manufactured by Analog Devices.
FEATURES
Fast 12-Bit ADC with 1.6 s Conversion Time 8 Single-Ended Analog Input Channels Overvoltage Protection on Each Channel Selection of Input Ranges:
؎5 V, ؎10 V for AD7891-1 0 to +2.5 V, 0 to +5 V, ؎2.5 V for AD7891-2 Parallel and Serial Interface On-Chip Track/Hold Amplifier On-Chip Reference Single-Supply, Low Power Operation (100 m W Max) Power-Down Mode (75 W Typ)
APPLICATIONS Data Acquisition Systems Motor Control Mobile munication Base Stations Instrumentation
VIN1A VIN1B
VIN2A VIN2B
VIN3A VIN3B
VIN4A VIN4B
VIN5A VIN5B
VIN6A VIN6B
VIN7A VIN7B
VIN8A VIN8B
FUNCTIONAL BLOCK DIAGRAM
VDD VDD
REF OUT/ REF IN
REF GND
2.5V REFERENCE
STANDBY
TRACK/HOLD
ADDRESS DECODE
CONTROL LOGIC
12-BIT ADC
CLOCK
DATA / CONTROL LINES
WR CS RD EOC CONVST MODE AGND AGND DGND
GENERAL DESCRIPTION
The AD7891 is an 8-channel, 12-bit data acquisition system with a choice of either parallel or...
