DS3901：Triple, 8-Bit NV Variable Resistor with Dual Settings and User EEPROM

Low Cost, Small Size, and a Rich Feature Set, Ideal Replacement for Conventional Mechanical-Trimming Resistors, Specifically in Module Applications

The DS3901 is a triple, 8-bit nonvolatile (NV) variable resistor. Each of the resistors has two setting registers, which are selectable by software or by pin configuration. The selected register determines the value of the variable resistor. Additionally, all three resistors have a high-impedance setting. Resistor R0 has the additional flexibility of allowing an external shunt resistor to provide increased dynamic range. Internal address settings allow the DS3901 slave address to be programmed to one of 128 possible addresses. The DS3901 also features an optional password-protection scheme that allows the protection of sensitive data.

Key Features

Three 256-Position Linear Digital Resistors
Full-Scale Resistances 50kΩ, 30kΩ, 20kΩ
Dual NV Settings for Each Resistor
Low Temperature-Coefficient Resistors
I²C Serial Interface
Wide Operating Voltage (2.4V to 5.5V)
Two-Level Password Write Protection
232 Bytes of User EEPROM
Programmable Slave Address
-40°C to +95°C Operating Temperature Range

DS3901: Typical Operating Circuit

DataSheet

title	Download file
DS3901 Data Sheet	DS3901.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
DS3901	Linear	3	I2C	Non-Volatile	256	20 30 50	20	50	250	250	TSSOP/14	$1.04 @1k