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DS3904, DS3905
Triple, 128-Position, Nonvolatile, Variable, Digital Resistor/Switch
Triple, 128-Position, Nonvolatile, Variable, Digital Resistors/Switches Simplify Automated PC Power-Supply Trim
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Status
Active: In Production.
Description
The DS3904/DS3905 contain three nonvolatile (NV) low
temperature coefficient, variable digital resistors. Each
resistor has 128 user-selectable positions. Additionally,
the DS3904/DS3905 have a high-impedance setting that
allows each resistor to function as a digital switch. The
DS3904/DS3905 can operate over a 2.7V to 5.5V supply
voltage range, and communication with the device is
achieved through a 2-wire serial interface. Address pins
allow multiple DS3904/DS3905s to operate on the same
two-wire bus. The DS3904 has one address pin, allowing
two DS3904s to share the bus, while the DS3905
has three address pins, allowing up to eight DS3905s to
share a common bus. The low-cost and small size of the
DS3904/DS3905 make them ideal replacements for conventional
mechanical trimming resistors.
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Data Sheet
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Key Features
- Three 20kΩ, 128-Position Linear Digital Resistors
- Resistor Settings are Stored in NV Memory
- Each Resistor has a High-Impedance Setting for Switch Operation to Control Digital Logic
- Low Temperature Coefficient
- 2-Wire Serial Interface
- 2.7V to 5.5V Operating Range
- -40°C to +85°C Industrial Temperature
- Packaging: 8-Pin µSOP for DS3904, 10-pin µSOP for DS3905
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Applications/Uses
- Cell Phones/PDAs
- Fibre Optic Transceiver Modules
- Portable Electronics
- Power-Supply Calibration
- Test Equipment
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Key Specifications:
| Digital Potentiometers |
| Part Number |
Taper |
POTs |
Control Interface |
Wiper Memory |
Steps |
REND-TO-END
(kΩ) |
Res. Tol.
(%) |
Temp. Coeff.
(ppm/°C) |
ICC @5V
(µA) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
max |
max w/pins |
See Notes |
| DS3905 |
Linear |
3 |
2-Wire Addressable |
Non-Volatile |
128 |
20 |
25 |
125 |
200 |
15.4 |
$0.75 @1k |
| DS3904 |
16.2 |
$0.70 @1k |
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See All Digital Potentiometers (129)
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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 Operating Circuit
More Information
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Information Index
Rev 2;
2005-09-14
This page last modified: 2009-10-13
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