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Texas Instruments TSC2003IPWRG4
- Part No.:
- TSC2003IPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Touch Screen Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TSC2003IPWRG4.pdf
- Description:
- IC SCREEN CNTRL 12BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
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Product details
Overview
TSC2003IPWRG4 from Texas Instruments is a 4-wire resistive touch screen controller with integrated 12-bit SAR ADC, on-chip 2.5V reference, battery monitoring (0.5V–6V), on-die temperature sensing, and touch-pressure measurement. 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 - deployed in portable instrumentation and point-of-sale terminals requiring precise analog front-end integration.
For engineers reviewing the TSC2003IPWRG4 datasheet, TSC2003IPWRG4 pinout, TSC2003IPWRG4 application, or TSC2003IPWRG4 equivalent, key selection criteria include its dual-battery monitor inputs (VBAT1/VBAT2), PENIRQ open-drain interrupt signaling, differential ratiometric touch conversion architecture, and TSSOP-16 package compatibility with space-constrained handheld designs.
Technical Context
The TSC2003IPWRG4 implements a capacitive redistribution SAR ADC with built-in sample-and-hold, operating from a single 2.7V–5.25V supply. Its analog front end includes low-on-resistance switch drivers (X+/Y+ ≤ 5.5 Ω, X−/Y− ≤ 7.3 Ω) and configurable reference handling - supporting both internal 2.5V reference (±25 ppm/°C drift) and external reference input (2.0V to VDD).
It uses a multiplexed analog path for X/Y/Z position, two auxiliary inputs (IN1/IN2), two battery monitors, and dual diode-based temperature channels (TEMP0/TEMP1). Touch-pressure calculation leverages Z1/Z2 cross-panel measurements, while automatic power-down (PD0/PD1 control) reduces quiescent current to 3 µA when idle and unaddressed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC; delivers 4096 codes per full-scale range for high-fidelity touch coordinate digitization. |
| Integral Linearity Error | ±2 LSB in Standard/Fast Mode; ensures <0.05% nonlinearity error across full scale for accurate position mapping. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed Mode); enables rapid coordinate polling at >50 kSPS throughput without bus contention. |
| Battery Input Range | 0.5V to 6.0V on VBAT1/VBAT2; supports direct monitoring of Li-ion, NiMH, or backup cells without external scaling. |
| Temperature Accuracy | ±2°C (differential method), ±3°C (TEMP0 absolute); enables thermal compensation in battery management and ambient sensing. |
| Supply Voltage Range | 2.5V to 5.25V operation; compatible with 3.3V and 5V system rails while maintaining specified performance from 2.7V. |
| Power-Down Current | 3 µA (unaddressed, SDA/SCL high); minimizes standby drain in always-on portable devices with intermittent touch activity. |
Pinout & Package
TSC2003IPWRG4 is packaged in a 16-pin TSSOP (PW) with 0.65 mm pitch, rated for –40°C to +85°C operation and optimized for surface-mount assembly in compact handheld PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VDD (Pin 1) | Power supply input | Single 2.5V–5.25V rail powering analog/digital sections; requires local 1µF bypass capacitor. |
| X+, Y+, X−, Y− (Pins 2,3,4,5) | Touch screen interface | Direct connection to 4-wire resistive overlay; low-RON drivers enable precise ratiometric voltage division during position sampling. |
| GND (Pins 6,16) | Ground reference | Dual ground pins reduce return-path impedance and improve noise immunity for analog measurements. |
| VBAT1 / VBAT2 (Pins 7,8) | Battery monitor inputs | High-impedance (10 kΩ sampling, 1 GΩ off) inputs accepting 0.5V–6V; internally divided 4:1 before ADC. |
| VREF (Pin 9) | Reference input/output | Accepts external 2.0V–VDD reference or outputs internal 2.5V; unbuffered, low-current (<6 µA) node. |
| PENIRQ (Pin 10) | Open-drain interrupt | Active-low pen-down signal; requires external 30kΩ–100kΩ pull-up; asserts on touch detection to wake host MCU. |
| SDA / SCL (Pins 11,12) | I²C bidirectional data/clock | Compliant with Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes; CMOS logic levels. |
| A1 / A0 (Pins 13,14) | I²C address select | Set slave address bits (A1A0) to configure one of four possible I²C addresses (0x48–0x4B) on shared bus. |
| IN1 / IN2 (Pins 15,16) | Auxiliary analog inputs | 12-bit ADC channels for external sensors or signals; share same gain/offset specs as main touch path. |
Key Features
| Feature | Design Value |
|---|---|
| Differential ratiometric touch conversion | Eliminates errors from switch RON and supply variation by using Y+/Y− as reference pair - critical for stable coordinate accuracy across battery discharge. |
| Integrated 2.5V reference with shutdown | On-chip bandgap reference (2.45–2.55 V, ±25 ppm/°C) reduces BOM count; powered down via PD0/PD1 to save 250 µA quiescent current. |
| Two independent battery monitors | VBAT1/VBAT2 inputs support simultaneous primary/backup cell tracking with ±2% accuracy using internal 4:1 divider - no external resistors needed. |
| Dual-mode temperature sensing | Supports calibrated single-point (±3°C, 0.3°C/LSB) or differential two-point (±2°C, 1.6°C/LSB) measurement - enables flexible thermal management without calibration hardware. |
| Touch-pressure estimation | Calculates Z1/Z2 resistance ratios via firmware to derive relative pressure - provides tactile feedback capability without additional transducers. |
Applications
| Personal Digital Assistants | Portable Instrumentation |
|---|---|
Use Scenario: Handheld medical or field-test device with resistive touchscreen UI and battery-powered operation. IC Role / Device Role / Timing Role: Primary touch controller digitizing stylus/finger coordinates, measuring battery health, and reporting ambient temperature for sensor calibration. Use Value: Single-chip integration eliminates discrete ADC, reference, and battery monitor ICs - reducing board area by >30% and enabling sub-10mm-thick enclosures. | Use Scenario: Battery-operated multimeter or oscilloscope with touchscreen navigation and real-time power monitoring. IC Role / Device Role / Timing Role: Simultaneous acquisition of touch position, two auxiliary sensor inputs (IN1/IN2), and dual battery voltages for runtime estimation. Use Value: 50 kSPS throughput and I²C High-Speed mode allow <20 µs coordinate latency - essential for responsive instrument control under varying load conditions. |
| Point-of-Sale Terminals | Cellular Phones (Legacy Feature Phones) |
Use Scenario: Retail kiosk or countertop terminal with ruggedized resistive touchscreen and multi-cell battery backup. IC Role / Device Role / Timing Role: Generates PENIRQ interrupt on touch, samples X/Y coordinates in ratiometric mode, and monitors main/backup battery voltage for graceful shutdown. Use Value: ±2 LSB linearity and auto-power-down extend battery life beyond 8 hours while maintaining <0.5 mm positional repeatability across temperature. | Use Scenario: Feature phone with QVGA resistive display, keypad override, and thermal-aware charging control. IC Role / Device Role / Timing Role: Coordinates touch input with TEMP0/TEMP1 diode readings to throttle charging current when die temperature exceeds safe threshold. Use Value: On-die temperature measurement accuracy of ±2°C enables reliable thermal regulation without external thermistors - cutting BOM cost by $0.12/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar touch screen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TSC2007IPW | 12-bit, I²C, TSSOP-16, but adds SPI interface and higher 100 kSPS throughput; no internal reference - requires external 2.5V source. | Preferred where dual-interface flexibility (I²C+SPI) or faster sampling is required; unsuitable if reference integration is mandatory. | Select TSC2007IPW only if system already provides precision external reference and needs SPI fallback or >50 kSPS burst capture. |
| Analog Devices AD7873ARUZ | 12-bit, SPI-only interface, TSSOP-16, includes internal reference (2.5V), but lacks battery monitoring and dual temperature channels. | Suitable for pure touch-only systems without battery/thermal monitoring; incompatible with I²C-only host designs. | Choose AD7873ARUZ when SPI-native microcontrollers are used and auxiliary functions (VBAT/TEMP) are handled elsewhere. |
Compared with TSC2003IPWRG4, the TSC2007IPW offers higher speed and interface flexibility at the cost of reference integration, while the AD7873ARUZ provides identical resolution and reference but omits battery/temperature features - making TSC2003IPWRG4 optimal for integrated power-aware touch systems.
Availability
TSC2003IPWRG4 is available at Aetrix Electronics and suitable for portable instrumentation, point-of-sale terminals, and legacy cellular handsets requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TSC2003IPWRG4 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 TSC2003 product line was designed specifically for cost-sensitive, battery-powered portable devices requiring integrated touch control, power monitoring, and thermal awareness - targeting handheld industrial and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by the TSC2003IPWRG4?
The TSC2003IPWRG4 supports I²C High-Speed Mode up to 3.4 MHz when bus capacitance is ≤100 pF, or 1.7 MHz at ≤400 pF. Standard (100 kHz) and Fast (400 kHz) modes are also fully compliant. This allows the TSC2003IPWRG4 to achieve >50 kSPS throughput while maintaining robust noise immunity in dense PCB layouts.
Does the TSC2003IPWRG4 require an external reference voltage?
No - the TSC2003IPWRG4 includes an internal 2.5V reference (2.45–2.55 V, ±25 ppm/°C) that can be enabled or disabled via PD0/PD1 control bits. It may also accept an external reference between 2.0V and VDD on the VREF pin, but this is optional. The internal reference is sufficient for battery monitoring, temperature, and auxiliary inputs.
How does the TSC2003IPWRG4 handle touch-pressure measurement?
The TSC2003IPWRG4 calculates touch pressure using Z1 and Z2 cross-panel resistance measurements derived from sequential ADC conversions. Firmware applies Equation 2 or 3 (per datasheet SBAS162G) using X/Y position and plate resistance values. The TSC2003IPWRG4 itself performs only the raw analog digitization - pressure computation is implemented in host software.
What is the function of the PENIRQ pin on the TSC2003IPWRG4?
The PENIRQ pin on the TSC2003IPWRG4 is an open-drain, active-low interrupt output that asserts when touch is detected on the resistive overlay. It requires an external 30kΩ–100kΩ pull-up resistor. This signal wakes the host processor from low-power states, eliminating continuous I²C polling and reducing system-level power consumption.
Can the TSC2003IPWRG4 monitor two separate batteries simultaneously?
Yes - the TSC2003IPWRG4 has dedicated VBAT1 and VBAT2 inputs, each supporting 0.5V–6.0V measurement with ±2% accuracy using internal 4:1 resistive dividers. Both channels operate independently and can be sampled sequentially via I²C commands, enabling primary/backup battery tracking in portable equipment without external components.
TSC2003IPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Touchscreen:
- 4 Wire Resistive
- Resolution (Bits):
- 12 b
- Interface:
- I2C
- Voltage Reference:
- Internal
- Voltage - Supply:
- 2.5V ~ 5.25V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
TSC2003IPWRG4 FAQ
1.How can I place an order for TSC2003IPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2003IPWRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TSC2003IPWRG4 reliable?
The price and inventory of TSC2003IPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2003IPWRG4 is usually 5 days.
3.What payment methods are accepted for TSC2003IPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2003IPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2003IPWRG4?
TSC2003IPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2003IPWRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TSC2003IPWRG4?
For technical support, including TSC2003IPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2003IPWRG4 requirements.
6.How does Aetrix verify that TSC2003IPWRG4 is sourced from the original manufacturer or authorized distributors?
All TSC2003IPWRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSC2003IPWRG4 meets industry standards.
7.What is the process for return or replacement of TSC2003IPWRG4?
All TSC2003IPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TSC2003IPWRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TSC2003IPWRG4 part is unused and in its original packaging.
Return procedure for TSC2003IPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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