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DS3908 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. DS3908
Description  Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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General Description
The DS3908 contains two nonvolatile digital poten-
tiometers with programmable-gain amplifiers buffering
the wiper outputs. The potentiometer position and
amplifier gain are controlled through an I2C*-compati-
ble 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.
Applications
Pin-Diode Biasing
Power-Supply Calibration
Cell Phones and PDAs
Portable Electronics
Features
o Two 64-Position Linear Taper Potentiometers
o Integral Wiper Buffering Amplifiers with
Selectable Gains of 1V/V, 2V/V, or 4V/V
o 100kΩ Potentiometer End-to-End Resistance
o Low Potentiometer Temperature Coefficient
o Nonvolatile Wiper and Gain Storage
o I2C-Compatible Interface
o Write-Protect Pin Prevents Accidental Field
Reprogramming
o 3V to 5.5V Supply Voltage Range
o -40°C to +85°C Operating Temperature Range
o 14-Pin TDFN Package
Dual, 64-Position Nonvolatile Digital
Potentiometer with Buffered Outputs
______________________________________________ Maxim Integrated Products
1
TDFN (3mm x 3mm)
TOP VIEW
2
4
5
13
11
10
H1
L1
H0
SCL
A1
A2
1
14
VCC
SDA
3
12
V1
A0
6
9
V0
WP
7
8
L0
GND
DS3908
Pin Configuration
POT0
H0
V0
L0
H1
V1
L1
I2C
INTERFACE
SDA
SCL
A0
A1
A2
WP
VOLTAGE
REFERENCE
NV ADJUSTABLE
REFERENCE
VOLTAGE
NV ADJUSTABLE
REFERENCE
VOLTAGE
VCC
DS3908
PGA0
POT1
PGA1
Typical Operating Circuit
Rev 0; 4/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
+Denotes lead-free package.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS3908N+
-40°C to +85°C
14 TDFN
I2C is a trademark of Philips Corp. Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed
Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided
that the system conforms to the I2C Standard Specification as defined by Philips.




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