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Texas Instruments TSC2046EIPWRG4
- Part No.:
- TSC2046EIPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Touch Screen Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TSC2046EIPWRG4.pdf
- Description:
- IC SCREEN CNTRL 12BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,297
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Product details
Overview
TSC2046EIPWRG4 from Texas Instruments is a 12-bit successive-approximation ADC touch screen controller with integrated drivers, 2.5V internal reference, battery monitoring (0V–6V), on-chip temperature sensing, and SPI/QSPI 3-wire interface. It operates from 2.2V to 5.25V analog supply and 1.5V to 5.25V digital I/O, delivering 125kHz sample rate and ±2 LSB integral linearity - ideal for resistive touch interfaces in portable handhelds.
For engineers reviewing the TSC2046EIPWRG4 datasheet, TSC2046EIPWRG4 pinout, TSC2046EIPWRG4 application, or TSC2046EIPWRG4 equivalent, key selection criteria include its 100% pin compatibility with ADS7846, differential ratiometric touch measurement mode, auto power-down (<3µA), and IEC 61000-4-2 ±15kV contact ESD rating on X/Y inputs.
Technical Context
The TSC2046EIPWRG4 implements a capacitive redistribution SAR architecture with integrated 6-channel analog multiplexer, on-die 2.5V bandgap reference (15ppm/°C drift), and configurable single-ended/differential reference modes. Its driver switches provide 5Ω (X+/Y+) and 6Ω (X−/Y−) on-resistance with 50mA drive capability for direct touch panel excitation.
It supports two temperature measurement methods: calibrated single-point (±3°C, 0.3°C/LSB) using TEMP0 diode, and ratiometric dual-current (±2°C, 1.6°C/LSB) using TEMP0/TEMP1. Battery monitoring uses an internal 4:1 resistor divider (7.5kΩ/2.5kΩ) enabling 0.5V–6.0V input range with ±3% accuracy using internal reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with no missing codes guaranteed - ensures monotonic position reporting across full touch range. |
| Sample Rate | Up to 125kHz - enables high-speed gesture capture and low-latency UI response in PDA and phone applications. |
| Integral Linearity | ±2 LSB - limits positional error to <0.05% of full scale, critical for accurate stylus or finger coordinate mapping. |
| Supply Range | +VCC: 2.2V–5.25V; IOVDD: 1.5V–5.25V - supports direct interfacing with 1.8V/3.3V microcontrollers and Li-ion battery rails. |
| ESD Rating | ±15kV contact discharge per IEC 61000-4-2 on X+/X−/Y+/Y− - eliminates need for external TVS diodes in handheld designs. |
| Power-Down Current | 3µA - extends battery life during display sleep or idle touch states without external control logic. |
| Reference Voltage | Internal 2.45–2.55V (2.5V typ) - provides stable scaling for AUX, battery, and temperature measurements without external components. |
Pinout & Package
TSC2046EIPWRG4 is packaged in TSSOP-16 (PW), with thermal pad internally connected to substrate. Pinout matches ADS7846 for drop-in replacement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VCC | Analog power supply | Primary 2.2–5.25V supply powering ADC core, reference, and drivers; must be ≥ IOVDD. |
| X+, Y+, X−, Y− | Touch panel interface | Direct connection to resistive overlay; X+/Y+ drive high-side, X−/Y− sink low-side during measurement cycles. |
| PENIRQ | Interrupt output | Open-drain active-low signal indicating pen/finger contact; pulled up internally (50kΩ). |
| DCLK, DIN, DOUT, CS, BUSY | SPI/QSPI interface | Standard 3-wire serial protocol; BUSY indicates conversion in progress; CS high forces ADC power-down. |
| VBAT, AUX, TEMP0/1 | Additional analog inputs | VBAT measures battery pre-regulator (0–6V); AUX accepts auxiliary sensor; TEMP0/1 enable dual-diode temperature sensing. |
| VREF | Reference I/O | Can source internal 2.5V reference or accept external 1.0–+VCC reference; internal ref disabled by default after power-up. |
| IOVDD | Digital I/O supply | Independent 1.5–5.25V rail for logic interface - allows level-shifting between low-voltage MCU and analog subsystem. |
Key Features
| Feature | Design Value |
|---|---|
| ADS7846 pin compatibility | 100% mechanical and electrical drop-in replacement - enables seamless upgrade of legacy designs without PCB revision. |
| Differential ratiometric mode | Eliminates touch position error caused by switch on-resistance variation - delivers consistent coordinate accuracy across temperature and battery voltage. |
| Integrated battery monitor | On-chip 4:1 resistor divider enables direct 0.5–6.0V battery voltage measurement - removes need for external scaling circuitry and saves BOM cost. |
| Two-temperature measurement methods | Supports both calibrated single-point (0.3°C/LSB) and self-calibrating dual-current (±2°C absolute) modes - accommodates production test constraints and field accuracy requirements. |
| No external components required | Internal reference, drivers, and biasing eliminate discrete passives - reduces layout area, improves reliability, and accelerates time-to-market. |
Applications
| Personal Digital Assistants | Point-of-Sale Terminals |
|---|---|
Use Scenario: Resistive touch screen navigation in compact handheld PDAs with limited battery capacity and space-constrained PCBs. IC Role / Device Role / Timing Role: Primary touch coordinate digitizer and system supervisor - performs X/Y/Z position, pressure, battery, and temperature measurements via single IC. Use Value: Reduces component count by integrating ADC, drivers, reference, and monitoring functions - lowers bill-of-materials and simplifies firmware calibration. | Use Scenario: Touch-based transaction interface in retail kiosks exposed to variable ambient temperatures and frequent user interaction. IC Role / Device Role / Timing Role: Touch controller with built-in temperature compensation and robust ESD protection - maintains coordinate accuracy across −40°C to +85°C operating range. Use Value: ±15kV IEC contact ESD rating on X/Y lines prevents field failures without external protection - increases product reliability in public-access environments. |
| Cellular Phones | Portable Instruments |
Use Scenario: Low-power touch interface in feature phones with 1.8V I/O microcontrollers and Li-ion battery supply. IC Role / Device Role / Timing Role: Dual-rail interface device - accepts 1.5–5.25V IOVDD for logic compatibility while operating analog section from 2.2–5.25V +VCC. Use Value: Independent IOVDD rail enables direct connection to 1.8V application processors - avoids level-shifters and associated signal integrity issues. | Use Scenario: Handheld test equipment requiring precise auxiliary measurements (e.g., thermistor, voltage probe) alongside touch control. IC Role / Device Role / Timing Role: Multi-function analog front-end - digitizes touch coordinates, battery voltage, chip temperature, and external AUX signals with shared 12-bit ADC resource. Use Value: Single 12-bit ADC with 6-channel MUX and internal reference replaces discrete measurement ICs - shrinks footprint and unifies calibration across sensor types. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar touch screen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7846IPWR | Same pinout and basic functionality but lacks internal 2.5V reference, battery monitor, and temperature sensing; requires external reference and support components. | Legacy design where only basic 4-wire touch digitization is needed; no auxiliary measurement capability required. | Select ADS7846IPWR only if existing design already uses external reference and does not require battery/temperature features. |
| TSC2046IPWR | Identical functional specification and pinout; differs only in RoHS compliance status and tape-and-reel packaging - TSC2046EIPWRG4 is the green (lead-free) version. | No functional difference; used interchangeably in new designs requiring RoHS-compliant components. | Choose TSC2046EIPWRG4 for RoHS-compliant production; TSC2046IPWR may be used only if legacy non-RoHS procurement is mandated. |
Compared with ADS7846IPWR, TSC2046EIPWRG4 adds integrated reference, battery/temperature sensing, and lower power-down current - enabling feature-rich portable designs with reduced BOM. Versus TSC2046IPWR, it offers identical performance with lead-free packaging for modern compliance requirements.
Availability
TSC2046EIPWRG4 is available at Aetrix Electronics and suitable for personal digital assistants, point-of-sale terminals, and cellular phones requiring stable component supply and long-term industrial availability.
Supply support for TSC2046EIPWRG4 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 broad industrial and automotive portfolio coverage.
The TSC2046E series was designed specifically for low-power, high-accuracy resistive touch screen systems in portable consumer electronics - emphasizing integration, ESD robustness, and multi-sensor capability.
FAQ
What is the primary function of the TSC2046EIPWRG4 in a touch-enabled system?
The TSC2046EIPWRG4 serves as a complete 4-wire resistive touch screen controller with integrated 12-bit SAR ADC, analog multiplexer, touch panel drivers, internal 2.5V reference, battery monitor, and temperature sensor. It digitizes X/Y coordinates, Z-pressure, battery voltage, and ambient temperature using a single SPI-compatible interface - eliminating the need for external references, drivers, or auxiliary ADCs in portable designs.
Does the TSC2046EIPWRG4 require external components to operate?
No, the TSC2046EIPWRG4 requires no external components for basic operation. Its internal 2.5V reference, on-chip drivers, and integrated battery divider enable full functionality - including touch coordinate acquisition, pressure calculation, battery monitoring (0–6V), and temperature sensing - without external resistors, capacitors, or voltage references. Only standard SPI-level decoupling capacitors are recommended per TI layout guidelines.
How does the TSC2046EIPWRG4 achieve ratiometric touch measurement?
The TSC2046EIPWRG4 achieves ratiometric touch measurement by configuring the SER/DFR bit low, which connects the +REF and –REF inputs directly to Y+ and Y− (or X+ and X−) touch panel electrodes. This makes the ADC conversion result independent of internal switch on-resistance and supply voltage variations - yielding position data as a percentage of panel resistance rather than an absolute voltage, improving accuracy across temperature and battery discharge.
What are the two temperature measurement methods supported by the TSC2046EIPWRG4?
The TSC2046EIPWRG4 supports two distinct temperature measurement methods: (1) Calibrated single-point using the TEMP0 diode (±3°C accuracy, 0.3°C/LSB resolution), requiring factory storage of VBE at known temperature; and (2) Self-calibrating dual-current method using TEMP0 and TEMP1 diodes (±2°C absolute accuracy, 1.6°C/LSB), which computes temperature from the voltage delta between two bias currents - eliminating need for initial calibration.
Is the TSC2046EIPWRG4 pin-compatible with the ADS7846?
Yes, the TSC2046EIPWRG4 is 100% pin-compatible with the ADS7846 and designed as a drop-in replacement. It shares identical TSSOP-16 pinout, timing, and command structure - allowing direct socket replacement in existing designs. However, the TSC2046EIPWRG4 adds enhanced features including internal reference, battery monitor, temperature sensing, and improved ESD rating, all without requiring PCB changes.
TSC2046EIPWRG4 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:
- SPI
- Voltage Reference:
- Internal
- Voltage - Supply:
- 2.2V ~ 5.25V
- Current - Supply:
- 780 µA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-TSSOP
TSC2046EIPWRG4 FAQ
1.How can I place an order for TSC2046EIPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2046EIPWRG4 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 TSC2046EIPWRG4 reliable?
The price and inventory of TSC2046EIPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2046EIPWRG4 is usually 5 days.
3.What payment methods are accepted for TSC2046EIPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2046EIPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2046EIPWRG4?
TSC2046EIPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2046EIPWRG4 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 TSC2046EIPWRG4?
For technical support, including TSC2046EIPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2046EIPWRG4 requirements.
6.How does Aetrix verify that TSC2046EIPWRG4 is sourced from the original manufacturer or authorized distributors?
All TSC2046EIPWRG4 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 TSC2046EIPWRG4 meets industry standards.
7.What is the process for return or replacement of TSC2046EIPWRG4?
All TSC2046EIPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TSC2046EIPWRG4, 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 TSC2046EIPWRG4 part is unused and in its original packaging.
Return procedure for TSC2046EIPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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