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DAC8812 Datasheet(PDF) 5 Page - Texas Instruments

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Part # DAC8812
Description  Dual, Serial Input 16-Bit Multiplying Digital-to-Analog Converter
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

DAC8812 Datasheet(HTML) 5 Page - Texas Instruments

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PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
DGND
DAC8812
(TOP VIEW)
AGNDA
IOUTA
VREFA
RFBA
RFBB
VREFB
IOUTB
AGNDB
LDAC
MSB
RS
VDD
CS
CLK
SDI
DAC8812
SBAS349A – AUGUST 2005 – REVISED DECEMBER 2005
PIN DESCRIPTION
PIN
NAME
DESCRIPTION
1
RFBA
Establish voltage output for DAC A by connecting to external amplifier output.
DAC A Reference voltage input terminal. Establishes DAC A full-scale output voltage. Can
2
VREFA
be tied to VDD pin.
3
IOUTA
DAC A Current output.
4
AGNDA
DAC A Analog ground.
5
AGNDB
DAC B Analog ground.
6
IOUTB
DAC B Current output.
DAC B Reference voltage input terminal. Establishes DAC B full-scale output voltage. Can
7
VREFB
be tied to VDD pin.
8
RFBB
Establish voltage output for DAC B by connecting to external amplifier output.
9
SDI
Serial data input; data loads directly into the shift register.
Reset pin; active low input. Input registers and DAC registers are set to all 0s or midscale.
10
RS
Register data = 0x0000 when MSB = 0. Register data = 0x8000 when MSB = 1 for
DAC8812.
Chip-select; active low input. Disables shift register loading when high. Transfers serial
11
CS
register data to input register when CS goes high. Does not affect LDAC operation.
12
DGND
Digital ground.
13
VDD
Positive power-supply input. Specified range of operation 2.7 V to 5.5 V.
MSB bit sets output to either 0 or midscale during a RESET pulse (RS) or at system
14
MSB
power-on. Output equals zero scale when MSB = 0 and midscale when MSB = 1. MSB pin
can be permanently tied to ground or VDD.
Load DAC register strobe; level sensitive active low. Transfers all input register data to the
15
LDAC
DAC registers. Asynchronous active low input. See Table 2 for operation.
16
CLK
Clock input. Positive edge clocks data into shift register.
5


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