Texas Instruments TPL0102-100RUCR

Overview

TPL0102-100RUCR from Texas Instruments is a dual-channel, 256-tap non-volatile digital potentiometer with 100 kΩ end-to-end resistance, I²C interface, ±0.5 LSB INL, and 4 ppm/°C ratiometric temperature coefficient-used for precision trimming in adjustable power supplies and sensor calibration circuits.

For engineers reviewing the TPL0102-100RUCR datasheet, TPL0102-100RUCR pinout, TPL0102-100RUCR application, or TPL0102-100RUCR equivalent, key selection criteria include wiper recall time (<100 µs), shutdown mode current (0.2 µA), EEPROM endurance (100,000 cycles), dual-supply operation (±2.25 V to ±2.75 V), and MicroQFN-14 package compatibility.

Technical Context

The TPL0102-100RUCR integrates two independent linear-taper digital potentiometers, each configurable as a three-terminal voltage divider or two-terminal rheostat. Its I²C interface supports standard (100 kHz) and fast (400 kHz) modes, with address bits A0–A2 enabling up to eight devices on one bus.

Non-volatile EEPROM stores wiper positions across power cycles, with automatic recall within 35–100 µs after VDD exceeds 2.3 V. Shutdown mode disconnects high terminals (HA/HB) via internal switches, reducing leakage and enabling system-level power gating.

Key Specifications

Pinout & Package

The TPL0102-100RUCR is packaged in a 14-pin X2QFN (MicroQFN) measuring 2.00 mm × 2.00 mm with 0.5 mm pitch and wettable flank leads for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital potentiometer applications.

Compared with AD5172BRUZ100 and MCP45HV51-103, the TPL0102-100RUCR uniquely combines dual-supply operation, integrated EEPROM with auto-recall, and guaranteed 4 ppm/°C ratiometric stability-making it optimal for embedded calibration where supply flexibility and zero-maintenance persistence are critical.

Availability

TPL0102-100RUCR is available at Aetrix Electronics and suitable for adjustable power supplies, sensor trimming, precision calibration of set-point thresholds, and mechanical potentiometer replacement requiring stable component supply and long-term lifecycle continuity.

Supply support for TPL0102-100RUCR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade interface solutions.

The TPL0102 product line delivers non-volatile digital potentiometers optimized for factory and field calibration in harsh environments-designed to replace mechanical pots while maintaining high linearity, low tempco, and robust power-cycle reliability.

FAQ

What is the default wiper position after power-up for the TPL0102-100RUCR?

The TPL0102-100RUCR powers up with wiper positions loaded from non-volatile memory (EEPROM). If no prior write occurred, the factory default Initial Value Register (IVR) value of 0x80h (mid-scale) is recalled-setting WA and WB to 50 kΩ from LA and LB respectively. This occurs within 35–100 µs after VDD exceeds 2.3 V, ensuring deterministic startup behavior for the TPL0102-100RUCR.

Does the TPL0102-100RUCR support dual-supply operation, and what are the voltage limits?

Yes, the TPL0102-100RUCR supports true dual-supply operation with VDD = +2.25 V to +2.75 V and VSS = –2.25 V to –2.75 V, enabling symmetric ±2.5 V analog signal handling. Terminal voltages (HA, LA, WA, etc.) may swing from VSS to VDD, allowing bipolar signal conditioning. In single-supply mode, VSS must be tied to GND and VDD operates from 2.7 V to 5.5 V-ensuring full functionality of the TPL0102-100RUCR across both architectures.

How many I²C addresses does the TPL0102-100RUCR support, and how are they configured?

The TPL0102-100RUCR supports eight unique I²C addresses (0x2C–0x2F) via hardware-selectable pins A0, A1, and A2. Each pin accepts logic high or low, with internal 100 kΩ pull-down resistors-so unconnected pins default to '0'. Address bits are sampled at power-up and remain fixed until reset. This allows up to eight TPL0102-100RUCR devices on a single I²C bus without software address remapping, simplifying multi-channel calibration systems.

What is the maximum allowable voltage across the H–L terminals of the TPL0102-100RUCR?

The absolute maximum voltage across any H–L pair (HA–LA or HB–LB) is limited to VDD – VSS, with VDD – VSS ≤ 7 V per absolute maximum ratings. For standard operation, the recommended terminal voltage range is VSS to VDD. At VDD = 5.5 V and VSS = 0 V, this permits up to 5.5 V across the resistor string; with dual supply (±2.75 V), up to 5.5 V differential remains valid. Exceeding these violates the TPL0102-100RUCR's safe operating area and risks permanent damage.

Can the TPL0102-100RUCR be used in rheostat mode, and how is it configured?

Yes, the TPL0102-100RUCR supports rheostat mode by connecting only two terminals per channel-for example, HA and WA for variable resistance between high and wiper, or LA and WA for low-to-wiper resistance. The unused terminal (e.g., LA when using HA/WA) may float or tie to WA. Resistance is calculated as RWL = (D/256) × RTOT or RHW = ((255−D)/256) × RTOT, where D is the 8-bit wiper code. This configuration is fully supported in the TPL0102-100RUCR's register mapping and timing specifications.