Information

Texas Instruments Signal Chain Guide 2013 | 61
Data Converters
Integrated ADCs and DACs
Integrated, Multichannel ADC and DAC for Analog Monitoring & Control
AMC7812
The AMC7812 is a complete analog monitoring and control solution that includes a
16-channel, 12-bit analog-to-digital converter (ADC), twelve 12-bit digital-to-analog
converters (DACs), eight GPIOs, and two remote/one local temperature sensor channels.
The AMC7812 has an internal reference of +2.5 V that can configure the DAC output
voltage to a range of either 0 V to +5 V or 0 V to +12.5 V. An external reference can be
used as well. Typical power dissipation is 95 mW. The AMC7812 is ideal for multichannel
applications where board space, size, and low power are critical.
Key Features
• 12,12-bitDACswithprogrammable
outputs
• DACshutdowntouser-definedlevel
• 12-bit,500kSPSADCwith16inputs
• Tworemotetemperaturesensorsand
one internal temperature sensor
•
Inputout-of-rangealarms
• 2.5Vinternalreference
• Eightgeneral-purposeinput/outputs
• ConfigurableI
2
C-compatible/SPI
interface with 5-V/3-V logic
•
Power-downmode
• Widetemperaturerange:
–40°C to +105°C
•
Smallpackages:9mm×9mm
QFN-64,
and10mm×10mm
HTQFP-64
Applications
• Telecomshelter:filterunit
• Generalpurposeanalogandmonitoring
Get more information: www.ti.com/product/AMC7812
AMC7812 functional block diagram
ADC-REF-IN/CMP
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
CH10
CH11
CH12
CH13
CH14
CH15
D1+
D2+
D1
D2
ALARM
DAV
RESET
TVNC
LCS/KLCS
C2I/IPS
DNGD
IOV
DD
VD
DD
ADS/IDS
0A/SC
1A/ODS
REF-DAC
REF-OUT
4DNGA
Local
Temperature
Sensor
Remote
Temperature
Sensor
Driver
Out-of-Range
Alarms
Control
Logic
(SPI/I C)
2
Control/Limits/Status
Registers
Trigger
Reference
(2.5V)
AMC7812
ADC
DAC-0
DAC-11
LOAD-DAC
DAC0-OUT
DAC1-OUT
DAC2-OUT
DAC3-OUT
DAC4-OUT
DAC5-OUT
DAC6-OUT
DAC7-OUT
DAC8-OUT
DAC9-OUT
DAC10-OUT
DAC11-OUT
DAC-CLR-0
DAC-CLR-1
3DNGA
2DNGA
1DNGA
VA
2DD
VA
1DD
VA
CC
/dednE-elgniS
laitnereffiD
dednE-elgniS
GPIO-5
2A
GPIO-4
GPIO-7
GPIO-6
GPIO-3
GPIO-0
OIPG/PMET
OIPG
Integrated ADCs and DACs: Analog Monitoring and Control Devices
Device
ADC/
DAC Res
(Bits)
No.
ADC
Inputs
No.
DAC
Outputs
ADC
Sample-
Rate (Ksps)
ADC Input
Range
(V)
DAC Output
Voltage -
(max) (V)
Number of Local
and Remote
Temp Sensors
No. of
GPIOs Interface Additional Features
HiRel
Avail. P ackage Price*
AMC7820 12 8 SE 3 100 0 to 5 +5 V None/None None SPI 9 Op Amps, Thermistor
Current Source
N TQFP-48 4.70
AMC7823 12 8 SE 8 200 0 to 5 +5 V 1/None 6 SPI Precision Current
Source
N QFN-40 6.00
AMC7812 12
(16 SE) or
(12 SE, 2 DE)
12 500 –5 to 5 +5 V/+12.5 V 1/2 8 SPI or I
2
C Out-of-Range Alarms N QFN-64 9.95
AMC7891 10 8 SE 4 500 0 to 5 +5V 1/None 12 SPI Out-of-Range Alarms N QFN-36 4.50
LMP92001 12 16 12 100 0 to 5 0 to 5 1/None 8 I
2
C Out-of-Range Alarms N LLP-54
(SQA54AB)
9.00
LMP92018 10 8 4 500 0 to 5 0 to 5 1/None 12 SPI Integrated Reference N LLP36
(SQA36A)
3.60
*Suggested resale price in U.S. dollars in quantities of 1,000. See www.ti.com/hirel for HiRel options. All parts have a built-in internal reference.