DAC8803 Datasheet, PDF (5/30 Pages) Texas Instruments – Quad, Current Output, Serial Input 14-Bit Multiplying Digital-to-Analog Converter

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DAC8803
PIN CONFIGURATIONS
DAC8803
(TOP VIEW)
SBAS340A – JANUARY 2005 – REVISED APRIL 2005
A_GNDA
1
I_OUTA
2
V_REFA
3
R_FBA
4
MSB
5
RS
6
V_DD
7
CS
8
CLK
9
SDI
10
R_FBB
11
V_REFB
12
I_OUTB
13
A_GNDB
14
28
A_GNDD
27
I_OUTD
26
V_REFD
25
R_FBD
24
DGND
23
V_SS
22
A_GNDF
21
LDAC
20
SDO
19
NC
18
R_FBC
17
V_REFC
16
I_OUTC
15
A_GNDC
NC − No internal connection
PIN
1, 14, 15, 28
2, 13, 16, 27
3, 12, 17, 26
4, 11, 18, 25
5
6
7
8
9
10
19
20
21
22
23
24
PIN DESCRIPTION
NAME
A_GNDA, A_GNDB, A_GNDC, A_GNDD
I_OUTA, I_OUTB, I_OUTC, I_OUTD
V_REFA, V_REFB, V_REFC, V_REFD
R_FBA, R_FBB, R_FBC, R_FBD,
MSB
RS
V_DD
CS
CLK
SDI
NC
SDO
LDAC
A_GNDF
V_SS
DGND
DESCRIPTION
DAC A, B, C, D Analog ground
DAC A, B, C, D Current output
DAC A, B, C, D Reference voltage input terminal. Establishes DAC A, B, C, D full-scale
output voltage. Can be tied to V_DD.
Establish voltage output for DAC A, B, C, D by connecting to external amplifier output.
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
code (8000h) determined by the voltage on the MSB pin. Register data = 8000h when
MSB = 1.
Positive power-supply input. Specified range of operation 5 V ±10%.
Chip-select; active low input. Disables shift register loading when high. Transfers shift
register data to input register when CS/LDAC goes high. Does not affect LDAC
operation.
Clock input; positive edge triggered clocks data into shift register
Serial data input; data loads directly into the shift register.
Not connected; leave floating
Serial data output; input data load directly into shift register. Data appears at SDO, 19
clock pulses after input at the SDI pin.
Load DAC register strobe; level sensitive active low. Tranfers all input register data to
the DAC registers. Asynchronous active low input. See Table 1 for operation.
High current analog force ground.
Negative bias power-supply input. Specified range of operation -0.3 V to -5.5 V.
Digital ground.
5