Datasheet
DS4432
Dual-Channel, I
2
C, 7-Bit Sink/Source
Current DAC
4 _______________________________________________________________________________________
Pin Description
NAME PIN FUNCTION
SDA 1 I
2
C Serial Data. Input/output for I
2
C data.
SCL 2 I
2
C Serial Clock. Input for I
2
C clock.
FS1 3
FS0 5
Full-Scale Calibration Inputs. A resistor to ground on these pins determines the full-scale current
for each output. FS0 controls OUT0; FS1 controls OUT1.
GND 4 Ground
OUT0 6
OUT1 7
Current Outputs. Sinks or sources the current determined by the register settings and the
resistance connected to FS0 and FS1.
V
CC
8 Power Supply
Typical Operating Characteristics
(Applies to OUT0 and OUT1. V
CC
= 2.7V to 5.0V, SDA = SCL = V
CC
, T
A
= +25°C, and no loads on OUT0, OUT1, FS0, or FS1, unless
otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS4432 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
5.04.54.03.53.0
25
50
75
100
125
150
0
2.5 5.5
DOES NOT INCLUDE CURRENT DRAWN BY
RESISTORS CONNECTED TO FS0 OR FS1.
SUPPLY CURRENT
vs. TEMPERATURE
DS4432 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
60 8040200-20
25
50
75
100
125
150
0
-40
DOES NOT INCLUDE CURRENT DRAWN BY
RESISTORS CONNECTED TO FS0 OR FS1.
V
CC
= 5.5V
V
CC
= 3.3V
V
CC
= 2.7V
VOLTCO (SOURCE)
DS4432 toc03
V
OUT
(V)
I
OUT
(μA)
4321
-225
-200
-175
-150
-250
05
40kΩ LOAD ON FS0 AND FS1.
VOLTCO (SINK)
DS4432 toc04
V
OUT
(V)
I
OUT
(μA)
3.53.02.52.01.51.00.5
175
200
225
250
150
0 4.0
40kΩ LOAD ON FS0 AND FS1.
TEMPERATURE COEFFICIENT
vs. SETTING (SOURCE)
DS4432 toc05
SETTING (DEC)
TEMPERATURE COEFFICIENT (°C/ppm)
100 125755025
0
50
100
150
200
250
300
-50
0
RANGE FOR THE 50μA TO 200μA CURRENT
SOURCE RANGE.
+25°C TO -40°C
+25°C TO +85°C
TEMPERATURE COEFFICIENT
vs. SETTING (SINK)
DS4432 toc06
SETTING (DEC)
TEMPERATURE COEFFICIENT (°C/ppm)
100 125755025
-150
-50
50
150
250
350
450
550
650
-250
0
RANGE FOR THE 50μA TO 200μA CURRENT
SINK RANGE.
+25°C TO -40°C
+25°C TO +85°C