Datasheet
www.ti.com
PIN CONFIGURATIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A
GND
A
I
OUT
A
V
REF
A
R
FB
A
MSB
RS
V
DD
CS
CLK
SDI
R
FB
B
V
REF
B
I
OUT
B
A
GND
B
A
GND
D
I
OUT
D
V
REF
D
R
FB
D
DGND
V
SS
(1)
A
GND
F
LDAC
SDO
NC
(1)
R
FB
C
V
REF
C
I
OUT
C
A
GND
C
DBPackage
(TOP VIEW)
NOTE (1):Nointernalconnection
DAC8814
SBAS338D – JANUARY 2005 – REVISED SEPTEMBER 2006
PIN DESCRIPTION
PIN NAME DESCRIPTION
1, 14, 15, 28 A
GND
A, A
GND
B, A
GND
C, A
GND
D DAC A, B, C, D Analog ground.
2, 13, 16, 27 I
OUT
A, I
OUT
B, I
OUT
C, I
OUT
D DAC A, B, C, D Current output.
DAC A, B, C, D Reference voltage input terminal. Establishes DAC A, B, C, D full-scale
3, 12, 17, 26 V
REF
A, V
REF
B, V
REF
C, V
REF
D
output voltage. Can be tied to V
DD
.
4, 11, 18, 25 R
FB
A, R
FB
B, R
FB
C, R
FB
D Establish voltage output for DAC A, B, C, D by connecting to external amplifier output.
5 MSB MSB Bit set during a reset pulse (RS) or at system power-on if tied to ground or V
DD
.
Reset pin, active low. Input register and DAC registers are set to all zeros or half-scale
6 RS code (8000h) determined by the voltage on the MSB pin. Register data = 8000h when
MSB = 1.
7 V
DD
Positive power-supply input. Specified range of operation +2.7 V to +5.5 V.
Chip select; active low input. Disables shift register loading when high. Transfers shift
8 CS
register data to input register when CS/ LDAC goes high. Does not affect LDAC operation.
9 CLK Clock input; positive edge triggered clocks data into shift register
10 SDI Serial data input; data loads directly into the shift register.
19 NC Not connected; leave floating.
Serial data output; input data loads directly into shift register. Data appears at SDO, 19
20 SDO
clock pulses after input at the SDI pin.
Load DAC register strobe; level sensitive active low. Transfers all input register data to
21 LDAC
the DAC registers. Asynchronous active low input. See Table 1 for operation.
22 A
GND
F High current analog force ground.
23 V
SS
No internal connection.
24 DGND Digital ground.
5
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