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Texas Instruments TSC2046EIPWG4
- Part No.:
- TSC2046EIPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Touch Screen Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TSC2046EIPWG4.pdf
- Description:
- IC SCREEN CNTRL 12BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,737
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Product details
Overview
TSC2046EIPWG4 from Texas Instruments is a 12-bit successive-approximation ADC touch screen controller with integrated 2.5V reference, 6-channel analog multiplexer, and on-chip temperature/battery/pressure measurement. It operates from 2.2V to 5.25V supply, supports 1.5V–5.25V digital I/O, delivers 125kHz sample rate, and is pin-compatible with ADS7846 for drop-in replacement in resistive touch systems.
For engineers reviewing the TSC2046EIPWG4 datasheet, TSC2046EIPWG4 pinout, TSC2046EIPWG4 application, or TSC2046EIPWG4 equivalent, key selection criteria include its ratiometric differential reference mode for touch position accuracy, internal reference power-down capability for <3µA standby current, ±2 LSB integral linearity, and IEC 61000-4-2 ±15kV contact ESD robustness on X/Y inputs.
Technical Context
The TSC2046EIPWG4 implements a capacitive redistribution SAR architecture with built-in sample-and-hold, enabling precise digitization of X/Y/Z coordinates, auxiliary voltage, battery voltage (0–6V), and diode-based temperature (−40°C to +85°C). Its dual-reference operation-single-ended (internal 2.5V) and differential (ratiometric to touch panel drivers)-eliminates switch on-resistance error in position sensing.
It features QSPI/SPI 3-wire serial interface with CS/DCLK/DIN/DOUT/BUSY/PENIRQ control, auto power-down triggered by CS high, and programmable conversion modes including 12-bit precision, 8-bit pressure mode, and dual-measurement temperature calculation. The device uses a 0.6µm CMOS process and supports both SER (single-ended reference) and DFR (differential reference) configurations via DIN command bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC with no missing codes; enables 0.3°C temperature resolution and sub-millivolt battery monitoring accuracy. |
| Sample Rate | Up to 125kHz at 2.7V; supports real-time multi-touch coordinate capture without frame lag in portable UIs. |
| Integral Linearity | ±2 LSB max; ensures consistent positional accuracy across full 0–4095 code range for reliable touch mapping. |
| Reference Voltage | Internal 2.5V ±0.05V (2.45–2.55V); powers AUX, battery, and temperature channels; can be disabled to reduce quiescent current to 280µA. |
| ESD Rating | ±15kV contact discharge per IEC 61000-4-2 on X+/X−/Y+/Y− pins; eliminates need for external TVS diodes in handheld designs. |
| Supply Range | +VCC: 2.2V–5.25V; IOVDD: 1.5V–5.25V; allows direct interfacing with 1.8V/3.3V microcontrollers while powering analog circuitry from battery rail. |
| Operating Temp | −40°C to +85°C; qualified for industrial and automotive infotainment environments without derating. |
Pinout & Package
TSC2046EIPWG4 is packaged in TSSOP-16 (PW), with thermal pad internally connected to substrate and recommended to be tied to analog ground. Pin 1 is +VCC; pin 16 is DCLK; all digital I/O pins are CMOS-compatible with 5pF input capacitance and rail-to-rail logic thresholds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VCC (Pin 1) | Analog power supply | Primary supply for ADC core, reference, and analog switches; must be ≥ IOVDD and supports 2.2–5.25V operation. |
| X+, Y+, X−, Y− (Pins 2,3,4,5) | Touch panel interface | Direct connection to resistive overlay; low on-resistance (5–6Ω) enables accurate voltage division without external drivers. |
| GND (Pin 6) | Analog ground reference | Common return for analog signals; must be separated from digital ground to avoid noise coupling into ADC measurements. |
| VBAT (Pin 7) | Battery monitor input | Accepts 0–6V unregulated battery voltage; internal 4:1 resistor divider scales input to 0–1.5V for safe ADC sampling. |
| AUX (Pin 8) | Auxiliary analog input | General-purpose 12-bit ADC channel usable for sensor voltage, system monitoring, or calibration references. |
| VREF (Pin 15) | Reference I/O | Configurable as 2.5V output (internal ref enabled) or high-impedance input (external ref up to +VCC supported). |
| IOVDD (Pin 14) | Digital I/O supply | Independent 1.5–5.25V rail for logic interface; decoupling required to prevent digital noise from modulating analog performance. |
| PENIRQ (Pin 11) | Active-low pen interrupt | Open-drain output asserting on touch detection; pulls low when X/Y resistance falls below threshold, signaling host to initiate conversion. |
| CS (Pin 13) | Chip select | Enables serial interface and controls power state; high = ADC power-down (3µA), low = active conversion and data transfer. |
| DCLK (Pin 16) | Serial clock input | External master clock driving SAR conversion timing and bit-shift synchronization; supports up to 2MHz for 125kHz throughput. |
| DIN/DOUT/BUSY (Pins 14,12,13) | Serial data interface | 3-wire SPI-compatible protocol: DIN latches control byte on rising edge; DOUT outputs conversion result on falling edge; BUSY indicates conversion in progress. |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric differential reference mode | Eliminates touch panel driver on-resistance error by referencing ADC directly to Y+ and Y−, delivering true position independence from panel aging or temperature drift. |
| Integrated battery monitor (0–6V) | On-chip 4:1 resistor divider enables direct battery voltage measurement without external components, supporting fuel gauging and low-battery warnings in portable devices. |
| Two-method temperature sensing | Supports either single-point calibrated (0.3°C resolution) or dual-diode differential (±2°C absolute) measurement, eliminating need for external thermal sensors in PDA/phone designs. |
| Touch-pressure calculation | Uses Z1/Z2 cross-panel measurements to compute touch resistance, enabling pressure-sensitive UI interactions without additional analog front-end circuitry. |
| Auto power-down on CS high | Reduces total supply current to 3µA (typical), extending battery life in always-on touch interfaces such as kiosks and medical handhelds. |
Applications
| Personal Digital Assistants | Point-of-Sale Terminals |
|---|---|
Use Scenario: Resistive touch overlay on monochrome or color LCD display in handheld organizer with stylus input. IC Role / Device Role / Timing Role: Primary touch coordinate digitizer performing X/Y/Z position, pressure, and temperature acquisition under microcontroller control via SPI. Use Value: 12-bit resolution and ±2 LSB linearity ensure pixel-accurate cursor placement; internal 2.5V reference removes need for external precision voltage source. | Use Scenario: Touch-enabled retail checkout terminal with integrated barcode scanner and receipt printer. IC Role / Device Role / Timing Role: Touch controller managing customer-facing interface during transaction flow, coordinating with secure element and payment processor. Use Value: ±15kV ESD protection on X/Y lines prevents field failures in high-traffic public environments; 2.2V minimum supply supports operation from degraded alkaline batteries. |
| Cellular Phones | Portable Instruments |
Use Scenario: Feature phone with resistive touchscreen used for dialer, messaging, and media navigation. IC Role / Device Role / Timing Role: Low-power touch interface IC providing PENIRQ-driven wake-up and rapid coordinate updates during user interaction. Use Value: 3µA power-down current extends standby time; 1.5V–5.25V I/O compatibility allows direct connection to 1.8V application processor GPIOs. | Use Scenario: Handheld multimeter or oscilloscope with touch-adjustable measurement parameters and waveform zoom. IC Role / Device Role / Timing Role: Analog front-end controller acquiring touch position, battery level, and ambient temperature for system health monitoring. Use Value: Integrated battery monitor (0–6V range) and temperature sensor eliminate discrete components, reducing BOM count and PCB area in space-constrained enclosures. |
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 | 12-bit SAR ADC, same pinout, but no internal 2.5V reference; requires external VREF; higher 1.25mW typical power at 2.7V. | Lacks integrated battery monitor and temperature sensor; limited to pure position sensing without auxiliary measurements. | Select when legacy design reuse is critical and auxiliary functions are handled externally. |
| TSC2046IPWR | Same die as TSC2046EIPWG4 but rated only for 0°C to +70°C; identical electrical specs and pinout; no difference in ESD or reference performance. | Not qualified for extended industrial temperature range; unsuitable for automotive or outdoor portable equipment. | Select only for cost-sensitive commercial-grade applications where −40°C operation is unnecessary. |
Compared with ADS7846IPWR, TSC2046EIPWG4 adds integrated reference, battery/temperature sensing, and lower power-down current; compared with TSC2046IPWR, it extends operating range to −40°C while maintaining identical functionality and layout compatibility.
Availability
TSC2046EIPWG4 is available at Aetrix Electronics and suitable for personal digital assistants, point-of-sale terminals, and cellular phones requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TSC2046EIPWG4 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 for industrial, automotive, and consumer markets.
The TSC2046E product line delivers highly integrated, low-power touch screen controllers optimized for battery-operated portable devices with resistive overlays, combining precision ADC, intelligent reference management, and system-level monitoring functions.
FAQ
What is the maximum operating supply voltage for the TSC2046EIPWG4?
The TSC2046EIPWG4 supports a +VCC supply range of 2.2V to 5.25V. Absolute maximum rating is +6V, but specified performance is guaranteed only within the 2.2–5.25V window. Exceeding 5.25V may cause parametric degradation or reliability issues. The device also accepts IOVDD from 1.5V to +VCC, enabling mixed-voltage system interfacing without level shifters.
Does the TSC2046EIPWG4 require external components for basic touch operation?
No, the TSC2046EIPWG4 requires no external components for fundamental touch screen operation. Its integrated 2.5V reference, on-chip touch panel drivers, and internal battery/temperature sensing eliminate the need for external voltage references, op-amps, or discrete sensors. Only standard 0.1µF bypass capacitors on +VCC and IOVDD are recommended for noise suppression per the datasheet.
How does the TSC2046EIPWG4 achieve ratiometric touch position accuracy?
The TSC2046EIPWG4 achieves ratiometric accuracy by configuring the SER/DFR bit low to route Y+ and Y− directly to the +REF and −REF inputs of the ADC. This makes the conversion result proportional to the touch panel's resistance ratio rather than absolute voltage, canceling errors from driver on-resistance and supply variation. The method is implemented entirely within the TSC2046EIPWG4 without external circuitry.
Can the TSC2046EIPWG4 measure battery voltage above 5.25V?
Yes, the TSC2046EIPWG4 supports battery voltage measurement from 0V to 6.0V via the VBAT pin. An internal 4:1 resistor divider scales the input so that 6.0V appears as 1.5V to the ADC, remaining within the 0–2.5V input span. Accuracy is ±2% with external reference or ±3% using the internal 2.5V reference, validated across the full −40°C to +85°C temperature range.
What is the function of the PENIRQ pin on the TSC2046EIPWG4?
The PENIRQ pin on the TSC2046EIPWG4 is an open-drain, active-low interrupt output that asserts when touch is detected on the resistive overlay. It monitors X/Y plate resistance and pulls low when contact closes the circuit below a programmable threshold. This signal wakes the host microcontroller from sleep, triggering immediate ADC conversion - a critical power-saving feature in battery-powered TSC2046EIPWG4 implementations.
TSC2046EIPWG4 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
TSC2046EIPWG4 FAQ
1.How can I place an order for TSC2046EIPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2046EIPWG4 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 TSC2046EIPWG4 reliable?
The price and inventory of TSC2046EIPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2046EIPWG4 is usually 5 days.
3.What payment methods are accepted for TSC2046EIPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2046EIPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2046EIPWG4?
TSC2046EIPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2046EIPWG4 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 TSC2046EIPWG4?
For technical support, including TSC2046EIPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2046EIPWG4 requirements.
6.How does Aetrix verify that TSC2046EIPWG4 is sourced from the original manufacturer or authorized distributors?
All TSC2046EIPWG4 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 TSC2046EIPWG4 meets industry standards.
7.What is the process for return or replacement of TSC2046EIPWG4?
All TSC2046EIPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TSC2046EIPWG4, 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 TSC2046EIPWG4 part is unused and in its original packaging.
Return procedure for TSC2046EIPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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