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DS4422N+TR

Description
Two-/Four-Channel, I2C, 7-Bit Sink/Source Current DAC
File Size224KB,11 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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DS4422N+TR Overview

Two-/Four-Channel, I2C, 7-Bit Sink/Source Current DAC

19-4744; Rev 1; 7/09
Two-/Four-Channel, I
2
C, 7-Bit Sink/Source
Current DAC
General Description
The DS4422 and DS4424 contain two or four I
2
C pro-
grammable current DACs that are each capable of
sinking and sourcing current up to 200µA. Each DAC
output has 127 sink and 127 source settings that are
programmed using the I
2
C interface. The current DAC
outputs power up in a high-impedance state.
Full-Scale Current 50µA to 200µA
Full-Scale Range for Each DAC Determined by
External Resistors
127 Settings Each for Sink and Source Modes
I
2
C-Compatible Serial Interface
Two Address Pins Allow Four Devices on Same
I
2
C Bus
Low Cost
Small Package (14-Pin, 3mm x 3mm TDFN)
-40°C to +85°C Temperature Range
2.7V to 5.5V Operating Range
Features
Two (DS4422) or Four (DS4424) Current DACs
DS4422/DS4424
Applications
Power-Supply Adjustment
Power-Supply Margining
Adjustable Current Sink or Source
Ordering Information
PART
DS4422N+
DS4422N+T&R
DS4424N+
DS4424N+T&R
OUTPUTS
2
2
4
4
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
14 TDFN-EP
14 TDFN-EP
14 TDFN-EP
14 TDFN-EP
Pin Configuration appears at end of data sheet.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
EP = Exposed pad.
Typical Operating Circuit
V
CC
V
OUT0
V
OUT1
R
PU
R
PU
SDA
SCL
A1
A0
GND
V
CC
DC-DC
CONVERTER
OUT
R
0A
FB
R
0B
DC-DC
CONVERTER
FB
R
1B
OUT
R
1A
DS4422/
DS4424
OUT0
OUT1
FS0
R
FS0
FS1
R
FS1
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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