DS3930E+T&R

Digital Potentiometers Overview

The DS3930E+T&R is a hex nonvolatile potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated. It integrates six 256-position digital potentiometers, 64 bytes of NV user EEPROM memory, and four programmable NV I/O pins. The device operates on a 2-wire serial interface with a supply voltage range of 2.7V to 5.5V. Each group of three potentiometers shares a common high side, forming an equivalent resistance of 16.6kΩ (three 50kΩ pots in parallel). All six share a common low side. The unit is housed in a 20-TSSOP package.

Digital Potentiometers Feature Summary

• Six 256-position nonvolatile potentiometers with factory default setting of FF Hex
• 64 bytes of NV user EEPROM memory and four general-purpose NV I/O pins
• Supports up to eight devices sharing the same 2-Wire bus via address pins A0-A2
• Allows 0 to 5.5V on any potentiometer terminal independent of VCC

Digital Potentiometers Applications

• RF Transceivers
• Voltage References
• Power Supply Calibration
• Fiber Optic Transceiver Modules
• Radio Tuners

Digital Potentiometers Procurement Notes

Verify that the 'T&R' suffix indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the manufacturer designation as Analog Devices Inc./Maxim Integrated. Ensure the specific part number matches the required 20-TSSOP package configuration for your PCB layout.

Digital Potentiometers Selection Notes

Select this component for applications requiring multiple calibrated resistive values without mechanical adjustment. The device supports both standard mode (100kHz) and fast mode (400kHz) clock rates. Consider the wiper resistance of 400Ω to 1000Ω and the end-to-end temperature coefficient of ±250ppm/°C for precision requirements.

Digital Potentiometers Part Context

The DS3930 belongs to the Maxim Integrated family of hex nonvolatile potentiometers. It serves as a small, low-cost replacement for mechanical potentiometers in portable electronics and mobile phones. The device retains settings through power cycles using its internal EEPROM structure.

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

Digital Potentiometers FAQ

How are the six potentiometers internally connected?

All six potentiometers share a common low side (LO0-5). They are separated into two groups of three; each group shares a common high side (HI0-2 and HI3-5), resulting in an equivalent resistance of 16.6kΩ per group.

What is the maximum number of DS3930 devices that can operate on a single bus?

Up to eight DS3930 devices can share the same 2-Wire bus, distinguished by the hardware address inputs A0, A1, and A2.

Can the potentiometer terminals handle voltages different from the supply voltage?

Yes, the device allows 0 to 5.5V on any potentiometer terminal, independent of the VCC supply voltage.