Texas Instruments TSC2003IPWG4

Overview

TSC2003IPWG4 from Texas Instruments is a 4-wire resistive touch screen controller IC with integrated 12-bit SAR ADC, on-chip 2.5V reference, battery monitoring (0.5V–6V), on-die temperature sensing, and touch-pressure calculation capability. It operates from 2.5V to 5.25V, supports I²C Standard/Fast/High-Speed modes up to 3.4 MHz, and delivers ±2 LSB integral linearity in standard/fast mode.

For engineers reviewing the TSC2003IPWG4 datasheet, TSC2003IPWG4 pinout, TSC2003IPWG4 application, or TSC2003IPWG4 equivalent, this device is selected for embedded human interface systems requiring simultaneous analog measurement of touch coordinates, auxiliary inputs, dual batteries, and ambient temperature - all within a single TSSOP-16 package.

Technical Context

The TSC2003IPWG4 implements a capacitive redistribution SAR ADC architecture with internal clock and programmable power-down control (PD0/PD1). Its analog front-end uses low-on-resistance switches (X+/Y+ ≤5.5Ω, X−/Y− ≤7.3Ω) to drive resistive touch panels while enabling ratiometric differential measurements that reject switch resistance error.

It features dual reference operation: internal 2.5V reference (±25 ppm/°C drift, 2.45–2.55V) for auxiliary/battery/temperature modes, and supply-ratiometric differential reference for touch coordinate acquisition. The I²C interface supports address selection via A0/A1 pins and open-drain PENIRQ interrupt signaling.

Key Specifications

Pinout & Package

TSC2003IPWG4 is packaged in a 16-pin TSSOP (PW) with 0.65 mm pitch, rated for –40°C to +85°C operation. Pinout matches TI's standard TSC2003 TSSOP footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar touch screen controller applications.

Compared with TSC2003IPWG4, the TSC2007IPW offers enhanced noise robustness at higher active power, while the AD7879-1WARUZ provides deeper sleep and dual-interface flexibility - neither is pin-compatible, but both serve overlapping touch + analog sensing roles in portable electronics.

Availability

TSC2003IPWG4 is available at Aetrix Electronics and suitable for handheld PDAs, portable medical instruments, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TSC2003IPWG4 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and human interface solutions.

The TSC2003IPWG4 belongs to TI's touch screen controller product line, engineered specifically for cost-sensitive, battery-operated portable devices needing integrated analog measurement alongside reliable 4-wire resistive touch digitization.

FAQ

What is the operating voltage range for the TSC2003IPWG4?

The TSC2003IPWG4 operates from 2.5 V to 5.25 V, with specified performance guaranteed from 2.7 V to 3.6 V. Its internal 2.5 V reference remains functional down to 2.7 V supply, and battery monitoring supports inputs from 0.5 V to 6.0 V - making it compatible with single-cell Li-ion, dual-cell alkaline, and regulated 3.3 V or 5 V system rails.

Does the TSC2003IPWG4 support differential touch measurement?

Yes, the TSC2003IPWG4 supports true differential ratiometric touch measurement by using Y+ and Y– as dynamic +REF and –REF inputs during X-coordinate acquisition - eliminating errors caused by switch on-resistance. This mode does not use the VREF pin; instead, it relies on the supply rail through the drivers, ensuring position accuracy remains stable across temperature and process variation.

How does the TSC2003IPWG4 handle temperature measurement?

The TSC2003IPWG4 provides two temperature sensing methods: a single-point TEMP0 diode mode (±3°C accuracy, 0.3°C/LSB resolution) and a differential two-current method (±2°C accuracy, 1.6°C/LSB). Both use on-die diodes with –2.1 mV/°C drift; the differential method requires no factory calibration and rejects offset drift, making it ideal for battery thermal monitoring in TSC2003IPWG4-based systems.

Can the TSC2003IPWG4 monitor two separate batteries simultaneously?

Yes, the TSC2003IPWG4 has dedicated VBAT1 and VBAT2 inputs, each supporting 0.5 V to 6.0 V with internal 4:1 resistor dividers. Each input draws only 10 kΩ during sampling and 1 GΩ in standby, minimizing loading on battery circuits. Measurements are performed sequentially via I²C commands, enabling independent health monitoring of main and backup power sources in TSC2003IPWG4 applications.

What I²C speeds does the TSC2003IPWG4 support, and how is addressing configured?

The TSC2003IPWG4 supports Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz) I²C modes. Addressing is set via hardware pins A0 and A1, allowing four unique 7-bit slave addresses (0x48–0x4B) on the same bus. No external pull-ups beyond standard I²C requirements are needed - SDA and SCL are open-drain with internal level-shifting compatible with 1.8 V to 5 V controllers.