AD5142BRUZ10-RL7

Overview

The AD5142BRUZ10-RL7 is a dual-channel, nonvolatile digital potentiometer featuring 256-position adjustment and an SPI-compatible interface. It offers a nominal resistance of 10 kΩ with ±8% tolerance and a low temperature coefficient of 35 ppm/°C. The device supports single or dual supply operation (2.3 V to 5.5 V) with an independent logic supply ranging from 1.8 V to 5.5 V. Key electrical characteristics include a 3 MHz bandwidth, fast start-up time under 75 µs, and wiper currents up to ±6 mA for the 10 kΩ variant. It is housed in a compact 16-lead TSSOP package and operates over an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Dual-channel architecture with 256-tap resolution and nonvolatile EEPROM storage for power-on position retention.
• SPI serial interface allowing independent programming and readback of wiper registers and memory contents.
• Linear gain setting mode via INDEP pin for accurate resistor matching between channels at power-up.
• Wide operating voltage range supporting both single-supply (2.3 V to 5.5 V) and dual-supply configurations.

Applications

• Portable electronics level adjustment
• LCD panel brightness and contrast controls
• Programmable filters, delays, and time constants
• Programmable power supplies

Procurement Notes

Verify the specific ordering suffix '-RL7' against the manufacturer's current datasheet to confirm reel packaging specifications. Ensure the 'B' grade designation aligns with required tolerance levels. Confirm availability through authorized distributors as supply status may vary. Cross-reference the TSSOP-16 package dimensions with PCB footprint requirements prior to procurement.

Selection Notes

Select this model for applications requiring dual-channel adjustment with persistent settings across power cycles. The 10 kΩ resistance value suits moderate impedance circuits, while the 100 kΩ option exists for higher impedance needs. Verify that the SPI clock speeds and logic voltage levels (1.8 V to 5.5 V) are compatible with the host microcontroller. Consider the thermal resistance of the TSSOP package if high power dissipation is expected in dense layouts.

Part Context

This component belongs to the AD512x/AD514x family of nonvolatile digital potentiometers from Analog Devices. The AD5142 specifically denotes the dual-channel, 256-position variant with SPI interface. It complements other family members like the AD5122 (128 positions) and quad-channel variants such as the AD5144. The family is designed for precision analog control in embedded systems requiring reliable, software-adjustable resistance values.

Replacement Considerations

Direct functional substitutes within the same family include the AD5142BCPZ10-RL7 (LFCSP package) or AD5142BRUZ100-RL7 (100 kΩ resistance). For single-channel applications, the AD5141 series may be considered. Ensure any replacement maintains the 256-position resolution and nonvolatile memory features if power-on retention is critical.