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DS3908
Dual 64-Position Nonvolatile Digital Potentiometer with Buffered Output
The DS3908 features two nonvolatile (NV), low temperature-coefficient, variable digital potentiometers with 64 user-selectable positions.
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Status
Active: In Production.
Description
The DS3908 contains two nonvolatile (NV) digital potentiometers with programmable-gain amplifiers buffering the wiper outputs. The potentiometer position and amplifier gain are controlled through an I²C-compatible serial bus. The DS3908 operates in both 3.3V and 5V systems and features a write-protect pin that locks the position of the potentiometers and gain registers. Up to eight DS3908s can be placed on a single I²C bus.
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Data Sheet
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Key Features
- Two 64-Position Linear Taper Potentiometers
- Integral Wiper Buffering Amplifiers With Selectable Gains of 1V/V, 2V/V, or 4V/V
- 100kΩ Potentiometer End-to-End Resistance
- Low Potentiometer Temperature Coefficient
- Nonvolatile Wiper and Gain Storage
- I²C-Compatible Interface
- Write-Protect Pin Prevents Accidental Field Reprogramming
- 3V to 5.5V Supply Voltage Range
- -40°C to +85°C Operating Temperature Range
- 14-Pin TDFN Package
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Applications/Uses
- Cell Phones/PDAs
- PIN Diode Biasing
- Portable Electronics
- Power Supply Calibration
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Key Specifications:
| Digital Potentiometers |
| Part Number |
Taper |
POTs |
Control Interface |
Wiper Memory |
Steps |
REND-TO-END
(kΩ) |
Temp. Coeff.
(ppm/°C) |
Wiper Resistance
(Ω) |
ICC @5V
(µA) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
typ |
max |
max w/pins |
See Notes |
| DS3908 |
Linear |
2 |
I2C |
Non-Volatile |
64 |
100 |
50 |
65 |
2000 |
9.6 |
$0.78 @1k |
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See All Digital Potentiometers (126)
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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
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Information Index
Rev 0;
2006-04-01
This page last modified: 2010-05-27
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