DS3903：Triple 128-Position Nonvolatile Digital Potentiometer

Lowest Cost Nonvolatile Triple Potentiometer Ideal for Automating Power-Supply Calibration Eliminates Manual Factory Calibration Costs

The DS3903 contains three nonvolatile (NV) low temperature coefficient digital potentiometers, which can be accessed through a 2-wire bus. The DS3903 operates in both 3V and 5V systems, and it features a write-protect pin that can lock the positions of the potentiometers. An address pin allows two DS3903s to be placed on the same 2-wire bus.

Key Features

Three 128-Position Linear Potentiometers (Two 10kΩ, One 100kΩ)
NV Wiper Storage
Low End-to-End Temperature Coefficient
Operates on an Industry-Standard 2-Wire Bus
Write-Protect Pin
Supply Range: 3V or 5V
Operating Temperature Range: -40°C to +85°C
Packaging: 20-Pin TSSOP

DS3903: Typical Operating Circuit

Applications/Uses

A Small and Low-Cost Replacement for Mechanical Potentiometers
Fiber Optic Transceiver Modules
Mobile Phones and PDAs
Portable Electronics
Power Supply Calibration

DataSheet

title	Download file
DS3903 Data Sheet	DS3903.pdf

Parametrics

Part Number	Taper	POTs	Control Interface	Wiper Memory	Steps	R_END-TO-END (kΩ)	Res. Tol. (%)	Temp. Coeff. (ppm/°C)	Wiper Resistance (Ω)	I_CC @5V (µA)	Package/Pins	Budgetary Price
Part Number	Taper	POTs	Control Interface	Wiper Memory	Steps	R_END-TO-END (kΩ)	Res. Tol. (%)	typ	typ	max	Package/Pins	See Notes
DS3903	Linear	3	2-Wire Addressable	Non-Volatile	128	10+10+90	20	300	250	250	TSSOP/20	$1.16 @1k

Quality and Environmental Data

DS3903.pdf

Ordering Information

Part Number	Notes	Status	Recommended Replacement	Package	Temp	RoHS
DS3903E-020	10k/100kohms	No Longer Available	DS3903E-020+	TSSOP,;20 pin;45.2 mm²	-40°C to +85°C	No
DS3903E-020+	10k/100kohms	Active		TSSOP,;20 pin;45.2 mm²	-40°C to +85°C	Lead Free
DS3903E-020+T&R	10k/100kohms	Active		TSSOP,;20 pin;45.2 mm²	-40°C to +85°C	Lead Free
DS3903E-020/T&R	10k/100kohms	No Longer Available	DS3903E-020+T&R	TSSOP,;20 pin;45.2 mm²	-40°C to +85°C	No
DS3903E-020/W		No Longer Available		TSSOP,;20 pin;45.2 mm²	-40°C to +85°C	No