Rainbow Electronics DS4432 - Manual (Page 4)

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 (
μ
A)
5.0 4.5 4.0 3.5 3.0
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 (
μ
A)
60 80 40 20 0 -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
(μ
A)
4 3 2 1
-225
-200
-175
-150
-250
0 5
40k Ω LOAD ON FS0 AND FS1.
VOLTCO (SINK)
DS4432 toc04
V OUT (V)
I OUT
(μ
A)
3.5 3.0 2.5 2.0 1.5 1.0 0.5
175
200
225
250
150
0 4.0
40k Ω LOAD ON FS0 AND FS1.
TEMPERATURE COEFFICIENT
vs. SETTING (SOURCE)
DS4432 toc05
SETTING (DEC)
TEMPERATURE COEFFICIENT (
°C/ppm)
100 125 75 50 25
0
50
100
150
200
250
300
-50
0
RANGE FOR THE 50 μA 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)
100 125 75 50 25
-150
-50
50
150
250
350
450
550
650
-250
0
RANGE FOR THE 50 μA TO 200μA CURRENT
SINK RANGE.
+25 °C TO -40°C
+25 °C TO +85°C