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DS4426
Quad-Channel, I²C-Margining IDACs with Three Channels of Power-Supply Tracking
Inexpensive, I²C-Adjustable, Power-Supply Margining and Tracking
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Status
Active: In Production.
Description
The DS4426 contains four I²C-adjustable current DACs capable of sinking or sourcing current. External resistors set the full-scale range of each output. Each DAC output has 127 sink and 127 source steps that are programmed by the I²C interface. Power-supply tracking functionality is provided for three channels using dedicated 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.
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Data Sheet
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Key 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
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Applications/Uses
- Adjustable Current Sink or Source
- Power-Supply Adjustment
- Power-Supply Margining
- Power-Supply Tracking
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Key Specifications:
| Precision DACs (4-12 Bits) |
| Part Number |
Resolution
(bits) |
Channels |
Output Type |
Reference |
INL
(±LSB) |
Interface |
Supply Range
(V) |
Supply Range
(V) |
Oper. Temp.
(°C) |
Budgetary Price |
| max |
min |
max |
See Notes |
| DS4426 |
8 |
4 |
Current- Buffered |
Ext. |
1 |
Serial - I2C |
2.7 |
5.5 |
-40 to +85 |
$1.37 @1k |
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See All Precision DACs (4-12 Bits) (267)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Application Circuit
More Information
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Information Index
Document Ref.: 19-4541
Rev 1;
2009-07-24
This page last modified: 2009-07-24
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