DS3903 Datasheet – Triple Digital Potentiometer IC

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Overview

The DS3903 contains three nonvolatile (NV) low-temperature coefficient digital potentiometers, which can be accessed through a 2-wire bus. It 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

Part NumberDS3903, DS3903E-020
FunctionTriple 128-Position Nonvolatile Digital Potentiometer
Package20-Pin TSSOP type
ManufacturerMaxim Integrated
DatasheetDownload PDF AM5890S pdf

DS3903 Features

  • Three 128-Position Linear Potentiometers (Two 10kW, One 90kW)
  • NV Wiper Storage
  • 0 to 5.5V on Any Potentiometer Terminal Independent of VCC
  • Low End-to-End Temperature Coefficient
  • Operates on an Industry-Standard 2-Wire Bus
  • Write-Protect Pin
  • Supply Voltage: 3V or 5V
  • Operating Temperature Range: -40°C to +85°C
  • Packaging: 20-Pin TSSOP

DS3903 Specifications

The voltage on VCC Pin Relative to the GroundThe voltage on VCC Pin Relative to Ground
The voltage on VCC Pin Relative to the Ground-0.5V to
VCC + 0.5V
Voltage on L0, L1, L2, W0, W1, W2, H0, H1, and H2 Relative to Ground-0.5V to +6.0V
Current Through W0, W1, and W2±4mA
Operating Temperature Range-40°C to +85°C
Programming Temperature Range0°C to +70°C
Storage Temperature Range-55°C to +125°C
Soldering TemperatureSee IPC/JEDEC J-STD-020A Specification

DS3903 Pinout

Pin Definitions

PINNAMEFUNCTION
1SDA2-Wire Serial Data. Input/output for 2-wire data.
2SCL2-Wire Serial Clock. Input for 2-wire clock.
3A0Address-Select Input. Determines device 2-wire address.
4WPWrite-Protect Input. Must be grounded to write to the potentiometer registers. An internal pullup locks the potentiometer positions if this pin is not connected.
5, 16, 17 18, 19N.C.No Connection
  6, 8, 9  L0, L1, L2  Potentiometer Low Terminals. Voltages on these pins should remain between GND and +5.5V while VCC is above +2.7V. Low terminals can be at potentials above the wiper or high terminals.
7, 12, 14W1, W2, W0Potentiometer Wiper Terminal. Voltages on these pins should remain between GND and +5.5V while VCC is above +2.7V.
10GNDGround Terminal
11, 13, 15H2, H1, H0Potentiometer High Terminals. Voltages on these pins should remain between GND and +5.5V while VCC is above +2.7V. High terminals can be at potentials below the low terminals.
20VCCSupply Voltage Terminal

Applications

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

DS3903 Datasheet

Download the DS3903 IC Datasheet from the link given below.