DS4426 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Quad-Channel, I2C-Margining IDACs with Three Channels of Power-Supply Tracking

19-4541; Rev 1; 7/09
Quad-Channel, I²C-Margining IDACs with
Three Channels of Power-Supply Tracking
General Description
The DS4426 contains four I²C-adjustable current DACs
capable of sinking or sourcing current. External resis-
tors set the full-scale range of each output. Each DAC
output has 127 sink and 127 source steps that are pro-
grammed by the I²C interface. Power-supply tracking
functionality is provided for three channels using dedi-
cated control inputs. Once power-supply tracking is
accomplished, the current outputs default to zero. Two
address pins allow up to four DS4426 devices to exist
on the same I²C bus.
Applications
Power-Supply Adjustment
Power-Supply Margining
Power-Supply Tracking
Adjustable Current Sink or Source
Features
♦ Four Current DACs
50µA to 200µA Adjustable Full-Scale Range
127 Settings Each for Sink and Source
♦ Power-Supply Tracking
Power-Supply Sequencing
Ramp-Up and Ramp-Down Tracking Control
Ratiometric Tracking Support
♦ +2.7V to +5.5V Operation
♦ I²C-Compatible Serial Interface
♦ Two Address Input Pins Allow Up to Four Devices
on Same I²C Bus
♦ Lead-Free, 28-Pin TQFN Package (4mm x 4mm)
with Exposed Pad
♦ Industrial Temperature Range: -40°C to +85°C
TOP VIEW
Pin Configuration
21 20 19 18 17 16 15
FS1 22
FS2 23
FS3 24
GAIN3 25
GAIN2 26
DS4426
GAIN1 27
+
*EP
N.C. 28
14 INN2
13 INP2
12 INN1
11 INP1
10 A1
9 A0
8 GND
1 234567
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS4426T+
-40°C to +85°C
28 TQFN-EP*
DS4426T+T&R
-40°C to +85°C
28 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
*EP = Exposed pad.
Functional Diagram appears at end of data sheet.
*EXPOSED PAD.
THIN QFN
(4mm × 4mm)
________________________________________________________________ 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.