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Texas Instruments TSC2004IRTJTG4
- Part No.:
- TSC2004IRTJTG4
- Manufacturer:
- Texas Instruments
- Category:
- Touch Screen Controllers
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
TSC2004IRTJTG4.pdf
- Description:
- IC SCREEN CNTRL 12BIT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,712
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Product details
Overview
TSC2004IRTJTG4 from Texas Instruments is a 12-bit, nanopower, 4-wire resistive touch screen controller with I²C interface, operating from 1.2V to 3.6V supply. It integrates SAR ADC, on-chip temperature sensor, touch pressure measurement, and preprocessing logic to reduce host bus activity. It is used in battery-powered handheld devices such as MP3 players and cellular phones requiring ultra-low power and compact footprint.
For engineers reviewing the TSC2004IRTJTG4 datasheet, TSC2004IRTJTG4 pinout, TSC2004IRTJTG4 application, or TSC2004IRTJTG4 equivalent, key selection criteria include its 12-bit resolution at 50SSPS, ±8kV HBM ESD rating, 4×4 mm QFN-20 package, programmable 10/12-bit mode, and support for standard/fast/high-speed I²C modes up to 3.4 MHz.
Technical Context
The TSC2004IRTJTG4 implements a register-based architecture with internal state machines managing touch acquisition, preprocessing, and I²C communication. Its SAR ADC uses ratiometric conversion referenced to VREF or SNSVDD, and includes dedicated drivers for X+/X−/Y+/Y− switching with ≤6 Ω on-resistance.
It features dual interrupt functionality via PINTDAV (configurable as DAV or PENIRQ), auto power-down control, and internal oscillator (3.2–4.3 MHz) eliminating external clock components. Preprocessing includes averaging (MAVEX/MAVEY), filtering, and touch detection logic that offloads timing-critical tasks from the host processor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Programmable 10-bit or 12-bit SAR ADC; enables trade-off between precision and data throughput for varying screen sizes. |
| Supply Range | 1.2V to 3.6V on SNSVDD; supports single-cell Li-ion or alkaline battery operation without LDO. |
| Power Consumption | 760 µW at 1.8V/50SSPS; enables >100-hour battery life in portable instrumentation with intermittent touch use. |
| I²C Support | Standard (100 kHz), Fast (400 kHz), and High-Speed (up to 3.4 MHz); compatible with modern microcontrollers without protocol translation. |
| ESD Rating | ±12 kV contact / ±25 kV air-gap discharge per IEC 61000-4-2; eliminates need for external TVS diodes on touch lines. |
| Temperature Sensing | On-chip diode-based sensor with ±2°C accuracy at 3.0V; provides system thermal monitoring without external components. |
| Sampling Rate | Up to ~12.3 kSPS effective rate in high-speed mode; sufficient for real-time gesture tracking in UI applications. |
Pinout & Package
The TSC2004IRTJTG4 is housed in a 4 × 4 mm, 20-pin thin QFN package (RTJ) with exposed thermal pad internally connected to SUBGND. Pin pitch is 0.5 mm; recommended PCB layout isolates SUBGND from DGND while connecting it to AGND for optimal ESD performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA | I²C bidirectional data line | Open-drain CMOS I/O; requires external pull-up; supports all three I²C speed modes. |
| SCL | I²C clock input | Input-only CMOS; synchronizes data transfer; rise/fall time specified down to 10 ns in high-speed mode. |
| PINTDAV | Programmable interrupt/status output | Configurable as DAV (data-ready) or PENIRQ (touch-detect); active-low, open-drain output. |
| RESET | Hardware reset input | Asynchronous active-low signal; resets all registers to default values; min pulse width 10 µs at ≥1.6V. |
| X+, X−, Y+, Y− | Touch panel drive/sense terminals | Analog inputs/outputs; integrated low-RON switches (≤6 Ω) enable precise 4-wire coordinate measurement. |
| AUX | Auxiliary analog input | Single-ended 12-bit channel for battery voltage, ambient light, or other analog signals; 12 pF input capacitance. |
| VREF | Reference voltage input | Accepts 1.2V–SNSVDD; optional-SNSVDD may serve as reference to eliminate external component. |
| SNSVDD | Analog power supply | Supplies sensor drivers, ADC, and internal oscillator; must be ≥I/OVDD; decoupling critical for noise immunity. |
| I/OVDD | Digital I/O supply | Defines logic thresholds for SDA/SCL/AD0/AD1/RESET; must be ≤SNSVDD; supports 1.2V–3.6V IO standards. |
| AGND / DGND / SUBGND / SNSGND | Ground domains | Separate analog/digital/substrate grounds minimize coupling; SUBGND ties to thermal pad for ESD current shunting. |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric conversion | Eliminates gain drift errors caused by VREF or SNSVDD variation; ensures stable coordinate accuracy across battery discharge. |
| Preprocessing engine | Reduces host CPU load by performing on-device averaging, filtering, and touch/no-touch decision logic before data transfer. |
| Internal oscillator | 3.2–4.3 MHz clock source removes need for external crystal or oscillator, saving board space and BOM cost. |
| Touch pressure measurement | Derives Z-axis resistance from X/Y measurements; enables pressure-sensitive UI actions without additional sensors. |
| Auto power-down control | Enters <1 µA sleep state when idle; wake-up triggered by PENIRQ or I²C address match-ideal for always-on touch interfaces. |
Applications
| Cellular Phones | MP3 Players |
|---|---|
Use Scenario: Capacitive-free resistive touchscreen UI in compact mobile handsets with limited PCB area and strict power budget. IC Role / Device Role / Timing Role: Primary touch interface controller handling coordinate acquisition, pressure sensing, and interrupt generation for ARM Cortex-M host. Use Value: 760 µW active power at 1.8V extends talk-time; ±12 kV ESD protection avoids external protection components. | Use Scenario: Touch navigation in portable audio players powered by single AAA/AA cells. IC Role / Device Role / Timing Role: Low-voltage touch controller interfacing to 1.2V–1.8V microcontroller via I²C; manages AUX input for battery monitoring. Use Value: 1.2V minimum supply enables direct battery connection; 12-bit resolution ensures accurate slider and menu navigation. |
| Portable Instruments | Multiscreen Touch Control |
Use Scenario: Handheld test equipment (e.g., multimeters, oscilloscopes) requiring rugged, glove-compatible touch interface. IC Role / Device Role / Timing Role: Robust touch acquisition IC with enhanced ESD tolerance and on-chip temperature compensation for field use. Use Value: ±25 kV air-gap ESD rating withstands repeated static discharge in lab environments; internal temp sensor enables thermal derating. | Use Scenario: Multi-panel industrial HMI where one host controls several independent touchscreens. IC Role / Device Role / Timing Role: I²C slave device with AD0/AD1 address pins enabling up to four unique addresses on same bus. Use Value: Configurable I²C address (0x48–0x4B) allows daisy-chained deployment without bus contention or level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar touch screen controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7843IPWR | 12-bit SAR ADC, SPI interface only; no I²C, no internal oscillator, no preprocessing engine. | Requires external clock and host-driven sequencing; higher software overhead for touch detection and averaging. | Select when SPI-native MCU is used and lowest BOM cost is prioritized over power/performance. |
| TSC2007IPWR | Same family, 24-pin QFN; adds AUX2 channel and improved noise immunity; identical I²C interface and register map. | Supports dual auxiliary inputs (AUX, AUX2) for simultaneous battery + temperature monitoring. | Select when second analog channel is required and PCB area permits larger package. |
Compared with ADS7843IPWR, TSC2004IRTJTG4 reduces host firmware complexity via preprocessing and eliminates external clocking; compared with TSC2007IPWR, it offers identical core functionality in a smaller 20-pin footprint at lower cost, sacrificing only one auxiliary input.
Availability
TSC2004IRTJTG4 is available at Aetrix Electronics and suitable for cellular phones, MP3 players, portable instruments, and multiscreen touch control systems requiring stable component supply, long-term lifecycle support, and guaranteed authenticity.
Supply support for TSC2004IRTJTG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TSC2004IRTJTG4 belongs to TI's precision analog touch interface product line, designed specifically for ultra-low-power, space-constrained human-machine interface applications in battery-operated portable devices.
FAQ
What is the minimum supply voltage required for reliable operation of the TSC2004IRTJTG4?
The TSC2004IRTJTG4 operates reliably from 1.2V to 3.6V on SNSVDD. At 1.2V, it delivers 12-bit conversion at 50SSPS with 285 µW power consumption and maintains full I²C functionality in standard and fast modes. Performance in high-speed mode is not guaranteed below 1.6V due to timing constraints across temperature.
Does the TSC2004IRTJTG4 require an external reference voltage?
No-the TSC2004IRTJTG4 supports ratiometric operation using SNSVDD as the reference, eliminating the need for an external VREF. However, an external reference (1.2V to SNSVDD) can be applied to VREF for improved absolute accuracy when required by the application.
How does the TSC2004IRTJTG4 reduce host processor workload?
The TSC2004IRTJTG4 reduces host workload through on-chip preprocessing: automatic touch detection, configurable averaging (MAVEX/MAVEY), digital filtering, and pressure calculation. These functions execute autonomously after configuration, allowing the host to poll only when PINTDAV asserts or read completed results from registers.
What is the function of the PINTDAV pin on the TSC2004IRTJTG4?
The PINTDAV pin on the TSC2004IRTJTG4 is a programmable open-drain output that can be configured as either Data Available (DAV) - indicating completion of an A/D conversion - or PENIRQ - signaling detection of screen touch. Its polarity is active-low, and it eliminates the need for polling the status register continuously.
Can the TSC2004IRTJTG4 interface with a 3.3V microcontroller I²C bus?
Yes-the TSC2004IRTJTG4 supports I/OVDD from 1.2V to 3.6V. When interfacing with a 3.3V MCU, set I/OVDD = 3.3V and ensure SNSVDD ≥ 3.3V. The SDA/SCL pins meet I²C voltage thresholds at this level, and the device remains fully compatible with standard, fast, and high-speed I²C protocols.
TSC2004IRTJTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-WFQFN Exposed Pad
- Touchscreen:
- 4 Wire Resistive
- Resolution (Bits):
- 12 b
- Interface:
- I2C, Serial
- Voltage Reference:
- External
- Voltage - Supply:
- 1.2V ~ 3.6V
- Current - Supply:
- 797 µA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QFN (4x4)
TSC2004IRTJTG4 FAQ
1.How can I place an order for TSC2004IRTJTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TSC2004IRTJTG4 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 TSC2004IRTJTG4 reliable?
The price and inventory of TSC2004IRTJTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSC2004IRTJTG4 is usually 5 days.
3.What payment methods are accepted for TSC2004IRTJTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSC2004IRTJTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSC2004IRTJTG4?
TSC2004IRTJTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSC2004IRTJTG4 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 TSC2004IRTJTG4?
For technical support, including TSC2004IRTJTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSC2004IRTJTG4 requirements.
6.How does Aetrix verify that TSC2004IRTJTG4 is sourced from the original manufacturer or authorized distributors?
All TSC2004IRTJTG4 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 TSC2004IRTJTG4 meets industry standards.
7.What is the process for return or replacement of TSC2004IRTJTG4?
All TSC2004IRTJTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TSC2004IRTJTG4, 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 TSC2004IRTJTG4 part is unused and in its original packaging.
Return procedure for TSC2004IRTJTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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