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Numéro de référence | DS4426 | ||
Description | I��C-Margining IDACs | ||
Fabricant | Maxim Integrated Products  | ||
Logo |   | ||
1 Page
19-4541; Rev 0; 4/09
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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
N.C. 28
+
*EP
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.
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Pages | Pages 14 | ||
Télécharger | [ DS4426 ] |
No | Description détaillée | Fabricant |
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