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DS4402/DS4404
Two/Four-Channel, I2C Adjustable Current DAC
4
______________________________________________________________________
VCC
RFS0
RFS1
RFS2
RFS3
SDA SCL
A1
A0
GND
FS0
FS1
OUT1
OUT0
CURRENT
DAC0
F8h
F9h
SOURCE OR
SINK MODE
FS2
OUT2
FS3
OUT3
CURRENT
DAC3
31-POSITIONS
EACH FOR SINK
AND SOURCE
MODE
FAh
FBh
DS4402/DS4404
DS4404
CURRENT
DAC1
CURRENT
DAC2
I2C-COMPATIBLE
SERIAL INTERFACE
Figure 1. Functional Diagram
Pin Description
PIN
DS4404
DS4402
NAME
FUNCTION
1
SDA
I2C Serial Data. Input/output for I2C data.
2
SCL
I2C Serial Clock. Input for I2C clock.
3
GND
Ground
4
—
FS3
5
—
FS2
6
FS1
7
FS0
Full-Scale Calibration Input. A resistor to ground on these pins determines the full-scale
current for each output. FS0 controls OUT0, FS1 controls OUT1, etc. (DS4402 has only
two inputs: FS0 and FS1.)
8
OUT0
10
OUT1
12
—
OUT2
14
—
OUT3
Current Output. Sinks or sources the current determined by the I2C interface and the
resistance connected to FSx. (DS4402 has only two outputs: OUT0 and OUT1.)
9, 11
A0, A1
Address Select Inputs. Tri-level inputs (VCC, GND, N.C.) determine the I2C slave address.
See the Detailed Description section for the nine available device addresses.
13
VCC
Power Supply
—
4, 5, 12, 14
N.C.
No Connection
—
EP
Exposed Pad. Leave unconnected or connect to GND.
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