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Texas Instruments TSC2000IPWRG4
- Part No.:
- TSC2000IPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Touch Screen Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TSC2000IPWRG4.pdf
- Description:
- IC SCREEN CNTRL 12BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,589
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Product details
Overview
TSC2000IPWRG4 from Texas Instruments is a 12-bit programmable analog interface IC for resistive 4-wire touch screens, integrating A/D conversion, battery monitoring (0.5–6 V), on-chip temperature sensing (±2°C accuracy), touch-pressure measurement, and an 8-bit current-output D/A converter for LCD contrast control. It operates from a single 2.7–3.6 V supply, uses SPI serial interface, and delivers ratiometric conversion for position accuracy in portable human-interface systems.
For engineers reviewing the TSC2000IPWRG4 datasheet, TSC2000IPWRG4 pinout, TSC2000IPWRG4 application, or TSC2000IPWRG4 equivalent, key selection considerations include its integrated touch-detection logic (PENIRQ), dual battery monitor inputs with different voltage ranges (VBAT1 up to 6 V, VBAT2 up to 3 V), 0.3°C temperature resolution, programmable 8/10/12-bit ADC resolution, and TSSOP-20 package compatibility with space-constrained PDA and handheld designs.
Technical Context
The TSC2000IPWRG4 implements a successive-approximation register (SAR) ADC with capacitive redistribution architecture, enabling built-in sample-and-hold functionality and ratiometric operation for touch screen measurements. Its internal 8 MHz oscillator feeds programmable clock dividers to support conversion rates up to 125 kHz at 12-bit resolution.
It features dedicated analog front-end drivers for X+/X−/Y+/Y− touch panel control, dual independent battery monitor channels with ±3% accuracy, and a temperature sensor diode pair (TEMP1/TEMP2) delivering 0.3°C resolution over –40°C to +85°C. The device supports three ADC operation modes: auto-touch-initiated, PENIRQ-triggered, and host-controlled conversion sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | Programmable 8-, 10-, or 12-bit; enables trade-off between speed (up to 125 kHz at 8-bit) and precision for touch, battery, or auxiliary measurements. |
| Supply Voltage | 2.7 V to 3.6 V; single-supply operation simplifies power design in battery-powered PDAs and mobile devices. |
| Battery Monitor Range | VBAT1: 0.5–6.0 V; VBAT2: 0.5–3.0 V; allows direct main/backup battery voltage monitoring without external scaling. |
| Temperature Accuracy | ±2°C over –40°C to +85°C; supports system thermal management and calibration compensation in handheld environments. |
| Touch Pressure Sensing | Supports Z1/Z2 measurement methods per TI SBAS257; enables force-sensitive UI interaction using standard 4-wire panels. |
| DAC Output | 8-bit current-output D/A (650 µA max); provides programmable LCD contrast control via external resistor (ARNG-to-GND). |
| Interface Protocol | SPI-compatible serial interface (CPOL = 0, CPHA = 1); ensures interoperability with common microcontrollers and reduces pin count. |
Pinout & Package
TSSOP-20 package (PW suffix), 0.65 mm pitch, thermally enhanced for low-power portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Single 2.7–3.6 V rail powering all analog and digital blocks; decoupling required near pin. |
| X+, X−, Y+, Y− | Touch screen electrode connections | Drive and sense terminals for 4-wire resistive panel; integrated low-on-resistance switches enable precise coordinate acquisition. |
| PENIRQ | Open-drain interrupt output | Active-low signal indicating touch detection; eliminates need for external polling and reduces host CPU wake-up latency. |
| DAV | Data-available flag | Signals completion of ADC conversion; synchronizes host data reads without fixed timing delays. |
| SCLK, SS, MOSI, MISO | SPI serial interface signals | Full-duplex synchronous communication; SS active-low enables multi-device bus sharing. |
| VBAT1, VBAT2 | Battery voltage monitor inputs | Dedicated analog inputs supporting different full-scale ranges; allow simultaneous monitoring of primary and secondary batteries. |
| AUX1, AUX2 | Auxiliary analog inputs | General-purpose 12-bit ADC channels usable for system monitoring (e.g., keypad voltage, ambient light). |
| TEMP1, TEMP2 | On-chip temperature sensor diodes | Dual diode outputs enable differential temperature measurement and improved noise immunity. |
| AOUT | DAC analog output current | Current-source output for LCD contrast; sets brightness via external load resistor tied to ARNG. |
| ARNG | DAC range set terminal | Analog reference node for DAC output current; defines full-scale current by resistor to GND (e.g., 1.2 kΩ → 650 µA). |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric touch conversion | Eliminates position error from VDD drift or reference variation-critical for stable touch accuracy across battery discharge cycles. |
| Integrated touch-detection logic | Hardware-based PENIRQ generation during power-down mode reduces host processor polling overhead and system power consumption. |
| Programmable panel stabilization delay | Configurable wait time before ADC sampling compensates for mechanical bounce and capacitive settling in real-world touch panels. |
| Dual independent battery monitors | VBAT1 (0.5–6 V) and VBAT2 (0.5–3 V) inputs enable direct monitoring of Li-ion main and backup coin-cell batteries without external dividers. |
| On-chip 0.3°C-resolution temperature sensor | Provides high-resolution thermal feedback for system-level calibration and thermal derating without external components. |
| Full power-down mode (3 µA) | Ultra-low quiescent current extends battery life in standby; retains register state and enables fast wake-up on PENIRQ. |
Applications
| Personal Digital Assistant (PDA) | Cellular Handset UI |
|---|---|
Use Scenario: Resistive touch screen navigation with stylus or finger input in compact handheld form factor. IC Role / Device Role / Timing Role: Primary analog interface managing X/Y coordinate acquisition, pressure detection, battery health monitoring, and LCD contrast control. Use Value: Single-chip integration replaces discrete ADC, comparator, and DAC functions-reducing BOM count and PCB area by >40% versus discrete solutions. |
Use Scenario: Touch-responsive menu navigation and dial pad entry in feature phones with limited board space. IC Role / Device Role / Timing Role: Touch controller with embedded PENIRQ-driven interrupt handling and dual-battery voltage supervision. Use Value: Enables reliable touch detection under varying battery voltage (2.7–3.6 V) and ambient temperature (–40°C to +85°C) without recalibration. |
| MP3 Player Interface | Industrial Handheld Terminal |
Use Scenario: Menu scrolling and playback control via small-format resistive touchscreen in battery-operated audio device. IC Role / Device Role / Timing Role: Analog front-end for touch panel, auxiliary input for button matrix, and temperature-compensated battery gauge. Use Value: 8-bit ADC mode reduces conversion time to <10 µs for responsive UI updates while maintaining sufficient resolution for gesture recognition. |
Use Scenario: Ruggedized field terminal requiring reliable touch input under wide temperature (-40°C to +85°C) and variable power conditions. IC Role / Device Role / Timing Role: Robust touch interface with hardware touch detection, on-chip temperature sensing, and battery voltage validation for safety-critical logging. Use Value: Integrated temperature sensor and ±2°C accuracy enable automatic gain correction of touch measurements-improving long-term positional stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog touch interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7843IPWR | 12-bit SAR ADC only; no integrated D/A, battery monitor, or temperature sensor; requires external reference and touch driver control logic. | Limited to basic X/Y coordinate acquisition; lacks pressure sensing, contrast control, and system monitoring functions. | Choose when minimal BOM cost is prioritized and system already includes separate battery/temperature monitoring. |
| TSC2007IPW | Enhanced successor with 12-bit ADC, integrated charge pump for VREF, lower power (1.25 mA typical), and extended temperature range (–40°C to +105°C). | Supports higher-resolution touchscreens and automotive-grade thermal requirements; adds automatic power-down sequencing. | Prefer for new designs needing improved power efficiency, wider operating range, or future-proofing against obsolescence. |
Compared with TSC2000IPWRG4, ADS7843IPWR offers lower integration but greater flexibility in reference and driver design, while TSC2007IPW delivers higher performance and extended reliability-making it suitable for next-generation portable and industrial touch interfaces where longevity and thermal robustness are critical.
Availability
TSC2000IPWRG4 is available at Aetrix Electronics and suitable for personal digital assistants, cellular handsets, and MP3 players requiring stable component supply and long-lifecycle support in consumer electronics manufacturing.
Supply support for TSC2000IPWRG4 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.
The TSC2000IPWRG4 belongs to TI's precision analog touch interface product line, designed specifically to consolidate touch-screen signal conditioning, battery monitoring, and display control into a single IC for space- and power-constrained portable devices.
FAQ
What is the maximum sampling rate supported by the TSC2000IPWRG4 at full 12-bit resolution?
The TSC2000IPWRG4 supports up to 125 kHz sampling at 8-bit resolution. At full 12-bit resolution, the maximum sampling rate is 12.5 kHz when using the internal 2 MHz conversion clock-verified in TI SBAS257 Section "Conversion Clock and Conversion Time". This rate ensures accurate ratiometric touch measurement while maintaining noise immunity and settling integrity across the 4-wire panel.
Does the TSC2000IPWRG4 require an external voltage reference for touch screen operation?
No-the TSC2000IPWRG4 performs ratiometric touch conversion using the panel's own drive voltage, eliminating dependence on external references. Its internal 2.5 V or 1.25 V reference is used only for single-ended measurements (battery, temperature, AUX). This architecture ensures consistent X/Y position accuracy across VDD variations and battery discharge-confirmed in the "Reference" section of TI SBAS257.
How does the TSC2000IPWRG4 detect touch and generate the PENIRQ signal?
In power-down mode, the TSC2000IPWRG4 activates the Y− driver to ground and connects PENIRQ to X+ via an internal transistor. When the screen is touched, X+ is pulled to ground through the panel resistance, causing PENIRQ to go LOW-an open-drain interrupt signaling touch detection. This hardware-based method avoids software polling and minimizes system power, as detailed in Figure 6 and "Touch Detect" section of SBAS257.
Can the TSC2000IPWRG4 measure touch pressure (Z-axis), and what inputs are required?
Yes-the TSC2000IPWRG4 supports two Z-measurement methods using Z1 and Z2 auxiliary conversions, as defined in Equations 1 and 2 of TI SBAS257. It requires X+ and Y+ (or Y−) drive activation plus readings from Z1 and Z2 registers. The device calculates touch resistance directly, enabling force-sensitive UI without external circuitry-validated in "OPERATION-TOUCH SCREEN" and Figure 3.
What is the function of the ARNG pin on the TSC2000IPWRG4, and how is it configured?
The ARNG pin sets the full-scale output current of the 8-bit D/A converter (AOUT). A resistor connected from ARNG to GND determines output range: e.g., 1.2 kΩ yields ~650 µA. This current drives LCD contrast circuits, allowing programmable brightness control. Configuration is static-no register write needed-per Electrical Characteristics table and Figure 1 in TI SBAS257.
TSC2000IPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Touchscreen:
- 4 Wire Resistive
- Resolution (Bits):
- 12 b
- Interface:
- Serial
- Voltage Reference:
- Internal
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Supply:
- 1.25 mA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-TSSOP
TSC2000IPWRG4 FAQ
1.How can I place an order for TSC2000IPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2000IPWRG4 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 TSC2000IPWRG4 reliable?
The price and inventory of TSC2000IPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2000IPWRG4 is usually 5 days.
3.What payment methods are accepted for TSC2000IPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2000IPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2000IPWRG4?
TSC2000IPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2000IPWRG4 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 TSC2000IPWRG4?
For technical support, including TSC2000IPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2000IPWRG4 requirements.
6.How does Aetrix verify that TSC2000IPWRG4 is sourced from the original manufacturer or authorized distributors?
All TSC2000IPWRG4 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 TSC2000IPWRG4 meets industry standards.
7.What is the process for return or replacement of TSC2000IPWRG4?
All TSC2000IPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TSC2000IPWRG4, 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 TSC2000IPWRG4 part is unused and in its original packaging.
Return procedure for TSC2000IPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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