AMC7823 Datasheet, PDF (1/48 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL CIRCUIT

BurrĆBrown Products
from Texas Instruments
AMC7823
SLAS453A – APRIL 2005 – REVISED OCTOBER 2005
ANALOG MONITORING AND CONTROL CIRCUIT
FEATURES
• 12-Bit ADC (200 kSPS)
– Eight Analog Inputs
– Input Range 0 to 2 × V_REF
• Programmable V_REF, 1.25 V or 2.5 V
• Eight 12-Bit DACs (2-µs Settling Time)
• Four Analog Input Out-of-Range Alarms
• Six General-Purpose Digital I/O
• Internal Bandgap Reference
• On-Chip Temperature Sensor
• Precision Current Source
• SPI™ Interface, 3-V or 5-V Logic Compatible
• Single 3-V to 5-V Supply
• Power-Down Mode/Low Power
• Small Package (QFN-40, 6 × 6 mm)
APPLICATIONS
• Communications Equipment
• Optical Networks
• Automatic Test Equipment
• Industrial Control and Monitor
• Medical Equipment
DESCRIPTION
The AMC7823 is a complete analog monitoring and
control circuit that includes an 8-channel, 12-bit
analog-to-digital converter (ADC), eight 12-bit digital-
to-analog converters (DACs), four analog input
out-of-range alarms, and six GPIOs to monitor analog
signals and control external devices. Also, the
AMC7823 has an internal sensor to monitor chip
temperature, and a precision current source to drive
remote thermistors, or RTDs, to monitor remote
temperatures.
Range
Threshold
Analog Input Signal Ground
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
Out-of-Range
Alarm
ADC
ADC Trigger
(External / Internal)
Channel Select
TEMP
Precision_Current
On-Chip
Temperature
Sensor
Current_Setting Resistor
Sync. Load
(Ext./Internal)
DAC-0
DAC-7
Reference
DAC 0_OUT
DAC 7_OUT
Ext. Ref _ IN
Registers and
Control Logic
Serial-Parallel Shift Reg
SPI Interface
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI is a trademark of Motorola, Inc.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated