Datasheet

DS4402/DS4404
Two/Four-Channel, I
2
C Adjustable Current DAC
4 ______________________________________________________________________
V
CC
V
CC
R
FS0
R
FS1
R
FS2
R
FS3
SDA SCL A1 A0
GND
FS0
FS1
OUT1OUT0
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
I
2
C-COMPATIBLE
SERIAL INTERFACE
Figure 1. Functional Diagram
Pin Description
PIN
DS4404 DS4402
NAME FUNCTION
1 1 SDA I
2
C Serial Data. Input/output for I
2
C data.
2 2 SCL I
2
C Serial Clock. Input for I
2
C clock.
3 3 GND Ground
4 — FS3
5 — FS2
6 6 FS1
7 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 8 OUT0
10 10 OUT1
12 — OUT2
14 — OUT3
Current Output. Sinks or sources the current determined by the I
2
C interface and the
resistance connected to FSx. (DS4402 has only two outputs: OUT0 and OUT1.)
9, 11 9, 11 A0, A1
Address Select Inputs. Tri-level inputs (V
CC
, GND, N.C.) determine the I
2
C slave address.
See the Detailed Description section for the nine available device addresses.
13 13 V
CC
Power Supply
— 4, 5, 12, 14 N.C. No Connection
— — EP Exposed Pad. Leave unconnected or connect to GND.