FEATURES APPLICATIONS
DESCRIPTION
Out-of-Range
Alarm
Range
Threshold
ADC
Analog Input Signal Ground
TEMP
CH8
Ext. Ref _ IN
Current_Setting Resistor
Precision_Current
ADCTrigger(External / Internal)
Channel Select
DAC-7
DAC-0
Sync. Load
(Ext./Internal)
Reference
DAC 7_OUT
DAC 0_OUTCH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
On-ChipTemperature
Sensor
Serial-Parallel Shift Reg
SPI Interface
CONVERT ELDAC
SCLK
S
S
MOSI MISO
GPIO
-0 /
ALR
0
GPIO
-3 /
ALR
3
GPIO
-4
GPIO
-5
A
V
DD
AGND
DV
DD
DGND
B
V
DD
(Ext. ADC
T
rigger)
(Ext. DAC
Sync Load)
Registers and
Control Logic
RESET
DA
V
GALR
AMC7823
SLAS453A – APRIL 2005 – REVISED OCTOBER 2005
ANALOG MONITORING AND CONTROL CIRCUIT
• Communications Equipment• 12-Bit ADC (200 kSPS)
• Optical Networks– Eight Analog Inputs
• Automatic Test Equipment– Input Range 0 to 2 × V REF
• Industrial Control and Monitor• Programmable V
REF , 1.25 V or 2.5 V • Medical Equipment
• Eight 12-Bit DACs (2- µ s Settling Time)
• Four Analog Input Out-of-Range Alarms
• Six General-Purpose Digital I/O The AMC7823 is a complete analog monitoring and
• Internal Bandgap Reference control circuit that includes an 8-channel, 12-bit
• On-Chip Temperature Sensor analog-to-digital converter (ADC), eight 12-bit digital-
to-analog converters (DACs), four analog input• Precision Current Source
out-of-range alarms, and six GPIOs to monitor analog• SPI ™ Interface, 3-V or 5-V Logic Compatible
signals and control external devices. Also, the
• Single 3-V to 5-V Supply AMC7823 has an internal sensor to monitor chip
temperature, and a precision current source to drive• Power-Down Mode/Low Power
remote thermistors, or RTDs, to monitor remote• Small Package (QFN-40, 6 × 6 mm)
temperatures.
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. Copyright © 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.