DAC8812 Datasheet, PDF (3/29 Pages) Texas Instruments – Dual, Serial Input 16-Bit Multiplying Digital-to-Analog Converter

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5 Device Comparison Table
DEVICE
DAC8812C
DAC8812B
6 Pin Configuration and Functions
PW Package
16-Pin TSSOP
Top View
DAC8812
SBAS349D – AUGUST 2005 – REVISED JANUARY 2016
MAXIMUM RELATIVE ACCURACY (LSB)
±1
±2
RFBA
1
VREFA
2
IOUTA
3
AGNDA
4
AGNDB
5
IOUTB
6
VREFB
7
RFBB
8
16
CLK
15
LDAC
14
MSB
13
VDD
12
DGND
11
CS
10
RS
9
SDI
PIN
NO. NAME
1 R_FBA
2 V_REFA
3 I_OUTA
4 A_GNDA
5 A_GNDB
6 I_OUTB
7 V_REFB
8 R_FBB
9 SDI
10 RS
11 CS
12 DGND
14 MSB
13 V_DD
15 LDAC
16 CLK
Pin Functions
I/O
DESCRIPTION
I
Establish voltage output for DAC A by connecting to external amplifier output.
I
DAC A reference voltage input pin. Establishes DAC A full-scale output voltage. Can be tied to V_DD pin.
O
DAC A current output
—
DAC A analog ground
—
DAC B analog ground
O
DAC B current output
I
DAC B reference voltage input pin. Establishes DAC B full-scale output voltage. Can be tied to V_DD pin.
I
Establish voltage output for DAC B by connecting to external amplifier output.
I
Serial data input; data loads directly into the shift register.
I
Reset pin; active-low input. Input registers and DAC registers are set to all 0s or midscale. Register data =
0x0000 when MSB = 0. Register data = 0x8000 when MSB = 1 for DAC8812.
I
Chip-select; active-low input. Disables shift register loading when high. Transfers serial register data to input
register when CS goes high. Does not affect LDAC operation.
—
Digital ground
MSB bit sets output to either 0 or midscale during a RESET pulse (RS) or at system power-on. Output
I
equals zero scale when MSB = 0 and midscale when MSB = 1. MSB pin can be permanently tied to ground
or V_DD.
I
Positive power-supply input. Specified range of operation 2.7 V to 5.5 V.
I
Load DAC register strobe; level-sensitive active-low. Transfers all input register data to the DAC registers.
Asynchronous active-low input. See Table 2 for operation.
I
Clock input. Positive edge clocks data into shift register.
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