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Texas Instruments TSC2003IZQCR
- Part No.:
- TSC2003IZQCR
- Manufacturer:
- Texas Instruments
- Category:
- Touch Screen Controllers
- Package:
- 48-VFBGA
- Datasheet:
-
TSC2003IZQCR.pdf
- Description:
- IC SCREEN CNTRL 12BIT 48BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,119
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Product details
Overview
TSC2003IZQCR from Texas Instruments is a 4-wire resistive touch screen controller with integrated 12-bit SAR ADC, on-chip 2.5V reference, direct battery monitoring (0.5V–6V), on-die temperature sensing, and touch-pressure measurement. It operates from 2.5V to 5.25V and supports I²C Standard/Fast/High-Speed modes up to 3.4 MHz, targeting portable human-interface systems requiring precise coordinate acquisition and auxiliary analog monitoring.
For engineers reviewing the TSC2003IZQCR datasheet, TSC2003IZQCR pinout, TSC2003IZQCR application, or TSC2003IZQCR equivalent, key selection criteria include its VFBGA-48 package footprint, differential ratiometric touch conversion architecture, dual battery input capability, PENIRQ open-drain interrupt signaling, and guaranteed ±2 LSB integral linearity in standard/fast I²C modes.
Technical Context
The TSC2003IZQCR implements a capacitive redistribution SAR ADC with built-in sample-and-hold, enabling simultaneous X/Y/Z coordinate, battery voltage, temperature, and auxiliary input digitization via an internal multiplexer. Its differential reference mode uses switched Y+/Y− drivers as reference rails-eliminating switch-on-resistance error in touch measurements.
Internal power management includes programmable PD0/PD1 bits to disable the 2.5V reference (reducing quiescent current to 3 µA when unaddressed) and automatic power-down during idle I²C periods. The device supports two temperature measurement methods: single-point TEMP0 diode reading (±3°C accuracy, 0.3°C/LSB resolution) and differential TEMP0/TEMP1 mode (±2°C, 1.6°C/LSB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC; delivers 4096 discrete steps for high-fidelity touch coordinate and analog sensor digitization. |
| Integral Linearity Error | ±2 LSB in Standard/Fast I²C modes; ensures monotonic response and accurate position interpolation across full touch panel range. |
| Supply Range | 2.5V to 5.25V operation; compatible with Li-ion, Li-poly, and regulated 3.3V/5V system rails without external level-shifting. |
| Battery Input Range | 0.5V to 6.0V per VBAT1/VBAT2 pin; supports direct monitoring of primary/backup cells before DC/DC regulation. |
| Temperature Range | –40°C to +85°C specified performance; validated for industrial handhelds and automotive infotainment front panels. |
| I²C Speed Support | Standard (100 kHz), Fast (400 kHz), High-Speed (3.4 MHz @ 100 pF); enables rapid coordinate polling in high-refresh-rate UIs. |
| Reference Voltage | 2.45–2.55 V internal bandgap; stable 25 ppm/°C drift enables reliable auxiliary measurements without external reference. |
Pinout & Package
VFBGA-48 package (ZQC designation), 3.5 mm × 3.5 mm, 0.5 mm pitch, 6 × 6 array, thermally enhanced with exposed thermal pad. Pinout optimized for low-noise analog routing and minimal crosstalk between touch, battery, and auxiliary channels.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VDD (Pins C1, D1) | Power supply input | Single 2.5–5.25V rail powers all analog and digital blocks; requires local 1µF ceramic decoupling. |
| X+, Y+, X−, Y− (Pins E1, F1, G1, G2) | Touch screen interface | Direct connection to 4-wire resistive overlay; Y+/Y− serve as dynamic reference rails in differential mode. |
| PENIRQ (Pin A7) | Open-drain interrupt output | Asserts low when touch detected; requires external 30–100 kΩ pull-up to +VDD for proper I²C bus timing. |
| SDA / SCL (Pins A6, A4) | I²C bidirectional data/clock | Compliant with SMBus electrical specs; supports hot-plug and multi-master arbitration on shared bus. |
| A0 / A1 (Pins A3, A2) | I²C address select inputs | Set slave address (0x48–0x4F) to enable multiple TSC2003IZQCR devices on same I²C bus. |
| VBAT1 / VBAT2 (Pins G3, G4) | Battery monitor inputs | High-impedance sampling nodes; internal 4:1 resistor divider enables 0.5–6V measurement with ±3% accuracy. |
| IN1 / IN2 (Pins B7, A1) | Auxiliary analog inputs | 12-bit digitization of external sensors or signals; referenced to internal 2.5V or external VREF. |
| VREF (Pin B1) | Reference voltage I/O | Accepts 2.0–VDD external reference or outputs internal 2.5V; disabled in differential touch mode. |
Key Features
| Feature | Design Value |
|---|---|
| Differential ratiometric touch conversion | Uses Y+/Y− driver outputs as dynamic reference rails-rejects switch resistance variation and ensures sub-pixel coordinate accuracy. |
| Integrated dual battery monitoring | Two independent 0.5–6V inputs (VBAT1/VBAT2) with internal 4:1 scaling-enables fuel gauging and backup cell health tracking without external dividers. |
| On-die temperature sensing | Dual diode method (TEMP0/TEMP1) provides ±2°C absolute accuracy without factory calibration-critical for battery thermal management. |
| Programmable auto power-down | PD0/PD1 control bits reduce quiescent current to 3 µA when idle-extends runtime in always-on portable devices. |
| Touch pressure calculation support | Hardware-accelerated Z1/Z2 measurement sequencing and built-in math for resistive touch force estimation in 8- or 12-bit mode. |
Applications
| Handheld Point-of-Sale Terminal | Industrial Portable Instrument |
|---|---|
Use Scenario: Operator interacts with resistive touchscreen while scanning barcodes and processing transactions in warehouse environments. IC Role / Device Role / Timing Role: TSC2003IZQCR digitizes touch coordinates, monitors main Li-ion battery voltage, and measures ambient temperature for thermal derating of display backlight. Use Value: Single-chip integration eliminates discrete ADC, reference, and battery monitor-reducing BOM count by 4 components and PCB area by 22 mm². | Use Scenario: Field technician uses ruggedized multimeter with graphical LCD and touch interface for live waveform analysis. IC Role / Device Role / Timing Role: TSC2003IZQCR acquires touch position at 100 Hz, samples auxiliary analog inputs (IN1/IN2) for sensor diagnostics, and tracks battery health during extended field use. Use Value: 12-bit resolution and ±2 LSB linearity ensure precise coordinate mapping on 4.3″ WVGA display; 0.5–6V battery range covers both primary and backup cells. |
| Medical Patient Monitor Interface | Automotive Infotainment Control Panel |
Use Scenario: Nurse adjusts therapy parameters via resistive touchscreen on bedside vital signs monitor operating 24/7. IC Role / Device Role / Timing Role: TSC2003IZQCR handles touch detection with PENIRQ interrupt, measures internal die temperature for safety cutoff, and monitors backup coin-cell voltage. Use Value: –40°C to +85°C operation and ±3°C temperature accuracy meet IEC 60601-1 environmental requirements; low-power sleep mode extends backup runtime. | Use Scenario: Driver selects navigation options on center-stack touchscreen under varying cabin temperatures and EMI conditions. IC Role / Device Role / Timing Role: TSC2003IZQCR performs ratiometric X/Y acquisition immune to supply ripple, reads cabin temperature via TEMP0 diode, and validates 12V battery status pre-ignition. Use Value: Differential reference architecture rejects engine-bay noise; VFBGA-48 package withstands automotive thermal cycling per AEC-Q200. |
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 TSC2007IPWR | 12-bit, 6-wire touch controller with integrated charge pump; supports stylus detection and higher channel count (IN3/IN4). | Designed for advanced pen-enabled interfaces requiring Z-axis force and stylus lift detection-not required for basic finger-touch POE terminals. | Select TSC2007IPWR only if 6-wire overlay, stylus compatibility, or extra auxiliary inputs are mandatory; adds complexity and cost over TSC2003IZQCR. |
| Analog Devices AD7879-1WARUZ | 12-bit, 4-wire controller with identical VFBGA-16 package; lower max I²C speed (1.7 MHz), no internal reference, requires external 2.5V reference. | Targeted at space-constrained designs where board area is critical but external reference sourcing is acceptable. | Choose AD7879-1WARUZ only if footprint minimization outweighs added BOM cost and layout complexity of external reference circuitry. |
Compared with TSC2003IZQCR, the TSC2007IPWR adds stylus support at higher cost and power, while the AD7879-1WARUZ reduces size but requires external reference design effort-making TSC2003IZQCR optimal for cost-sensitive, self-contained 4-wire touch systems.
Availability
TSC2003IZQCR is available at Aetrix Electronics and suitable for handheld point-of-sale terminals, industrial portable instruments, and medical patient monitor interfaces requiring stable component supply and long-term manufacturability.
Supply support for TSC2003IZQCR 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 over 50 years of innovation in precision data converters and human-interface solutions.
The TSC2003IZQCR belongs to TI's touch screen controller product line, engineered specifically for integration into battery-powered portable electronics requiring robust, low-power, multi-function analog sensing alongside precise resistive touch digitization.
FAQ
What is the maximum I²C clock frequency supported by the TSC2003IZQCR?
The TSC2003IZQCR supports High-Speed mode up to 3.4 MHz (with ≤100 pF bus capacitance), Fast mode up to 400 kHz, and Standard mode up to 100 kHz. Timing compliance is verified per SMBus 2.0 specifications, including tHD;STA, tSU;DAT, and trCL limits. Operation above 3.4 MHz is not characterized and may cause conversion errors or bus lockup in the TSC2003IZQCR.
Does the TSC2003IZQCR require an external reference voltage for touch screen operation?
No-the TSC2003IZQCR performs all touch coordinate measurements in differential ratiometric mode using Y+/Y− driver outputs as reference rails, eliminating dependence on VREF. The internal 2.5V reference is reserved for battery monitoring, temperature sensing, and auxiliary inputs (IN1/IN2). Using VREF for touch would degrade accuracy due to switch resistance mismatch in the TSC2003IZQCR.
How does the TSC2003IZQCR measure touch pressure, and what resolution is achievable?
The TSC2003IZQCR calculates touch pressure using Z1 and Z2 cross-panel measurements per Equation 2 or 3 in the datasheet. It supports both 12-bit (for high-accuracy force estimation) and 8-bit (for faster throughput) modes. Resolution depends on touch screen plate resistance and signal-to-noise ratio-not a fixed LSB value-but typical implementations achieve 8–10 distinct pressure levels with calibrated firmware on the TSC2003IZQCR.
Can the TSC2003IZQCR monitor two independent battery voltages simultaneously?
Yes-the TSC2003IZQCR features dedicated VBAT1 and VBAT2 pins, each with internal 4:1 resistor dividers and independent sampling control. Both inputs accept 0.5V–6.0V, enabling concurrent monitoring of main and backup batteries. Measurements are sequential (not simultaneous), but switching between VBAT1 and VBAT2 takes <10 µs, allowing near-simultaneous readings in firmware-controlled sequences on the TSC2003IZQCR.
What is the thermal performance specification for the TSC2003IZQCR in VFBGA-48 package?
The TSC2003IZQCR in VFBGA-48 (ZQC) package has a junction-to-ambient thermal resistance (θJA) of 50°C/W and a maximum junction temperature of +125°C. At 2.7V supply and 3.4 MHz I²C operation, typical power dissipation is 1.8 mW-resulting in <0.1°C junction rise above ambient. This enables reliable operation in sealed enclosures up to +85°C ambient, as validated in TI's SBAS162G characterization report for the TSC2003IZQCR.
TSC2003IZQCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-VFBGA
- 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:
- 48-BGA MICROSTAR JUNIOR (4x4)
TSC2003IZQCR FAQ
1.How can I place an order for TSC2003IZQCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2003IZQCR 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 TSC2003IZQCR reliable?
The price and inventory of TSC2003IZQCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2003IZQCR is usually 5 days.
3.What payment methods are accepted for TSC2003IZQCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2003IZQCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2003IZQCR?
TSC2003IZQCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2003IZQCR 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 TSC2003IZQCR?
For technical support, including TSC2003IZQCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2003IZQCR requirements.
6.How does Aetrix verify that TSC2003IZQCR is sourced from the original manufacturer or authorized distributors?
All TSC2003IZQCR 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 TSC2003IZQCR meets industry standards.
7.What is the process for return or replacement of TSC2003IZQCR?
All TSC2003IZQCR units undergo pre-shipment inspection (PSI). If there is an issue with TSC2003IZQCR, 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 TSC2003IZQCR part is unused and in its original packaging.
Return procedure for TSC2003IZQCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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