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Texas Instruments TPIC84000TPWPRQ1
- Part No.:
- TPIC84000TPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPIC84000TPWPRQ1.pdf
- Description:
- IC PASS ENTRY 134.2KHZ 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,727
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Product details
Overview
TPIC84000TPWPRQ1 from Texas Instruments is an automotive-grade low-frequency antenna driver IC for passive entry and passive start (PEPS) systems. It integrates eight programmable half-bridge MOSFET drivers, linear-mode sine-wave generation at 134.2 kHz, SPI-controlled gain staging (Gain1/Gain2/Destroy), and real-time current measurement per output channel - enabling precise magnetic field control for vehicle keyless access antennas.
For engineers reviewing the TPIC84000TPWPRQ1 datasheet, TPIC84000TPWPRQ1 pinout, TPIC84000TPWPRQ1 application, or TPIC84000TPWPRQ1 equivalent, this page delivers verified technical context, HTSSOP-28 package mapping, failure detection logic, modulated LF transmission capability, and OEM-validated automotive diagnostics - all specific to the TPIC84000TPWPRQ1 orderable part number.
Technical Context
The TPIC84000TPWPRQ1 implements a dedicated LF signal chain: an external CLK_IN (17.1776 MHz default) feeds a programmable clock divider (/1–/8) to generate a precise 2.1472 MHz internal clock, which drives both the 134.2 kHz sine-wave generator and fault-blanking timing. Its linear-mode output stage avoids switching noise, delivering clean carrier signals for ASK-modulated RFID communication.
Each of the eight outputs supports configurable bridge modes (half/full/parallel), phase inversion (0°/180°), and independent destroy-bit insertion. Current sensing uses sequential ADC-based measurement on low-side transistors with user-programmable timing (timer1/timer2), edge selection (rising/falling), and output channel assignment - all reported via SPI-accessible Control and Status Register (CSR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | –40°C to +105°C - qualified for under-hood and door module placement in automotive PEPS systems. |
| Output Channels | 8 independent programmable outputs - each configurable as half-bridge, full-bridge, or parallel bridge for multi-antenna vehicle coverage. |
| Carrier Frequency | 134.2 kHz sine wave - generated internally from CLK_IN; enables ISO 11784/11785-compliant LF RFID interrogation. |
| Gain Control | Three-stage programmable gain (Gain1, Gain2, Destroy) - allows dynamic power adjustment during telegram transmission and active signal termination. |
| Current Sensing | Per-output low-side current measurement with 5-bit resolution - supports open/short-to-GND/VBAT diagnostics via SPI-read CSR values. |
| SPI Interface | 64-bit frame (8-bit command + 56-bit data), slave-only mode - enables register configuration, buffer loading, CSR readback, and fault flag clearing without CPU overhead. |
| Fault Protection | Integrated IFAULT (DC >150 mA / 4 ms or bidirectional peak >0.9 A), over-temperature, and VS/VD under-voltage detection - latches faults in CSR until SPI read. |
Pinout & Package
TPIC84000TPWPRQ1 is housed in a thermally enhanced HTSSOP-28 (PWP) package with exposed thermal pad requiring PCB ground connection. Pin functions are validated per TI SLDS176 datasheet and match TPIC84134-Q1 pin compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS (Pins 15,21,22,28) | Main power supply input | Must be connected to all four VS pins regardless of active outputs; powers high-side drivers and internal logic. |
| Out1–Out8 (Pins 27,26,24,23,20,19,17,16) | Driver output terminals | Eight independent half-bridge outputs; support full/half/parallel bridge configurations per channel. |
| VA (Pin 5), VD (Pin 9) | Analog & digital supply inputs | VA sets sine-wave accuracy and ADC reference; VD powers digital core; must be tied together to prevent latch-up. |
| RBIAS (Pin 6) | Bias reference terminal | Connects external 62 kΩ, 1%, 50 ppm resistor to set bias current and ADC reference scaling. |
| CLK_IN (Pin 10), SDO/SDI/SCLK/NCS (Pins 11–14) | SPI and clock interface | 64-bit SPI slave interface with chip-select (NCS) active-low; CLK_IN provides master timing for internal clock divider. |
| VS/2 (Pin 1) | Internal voltage decoupling node | Requires 100 nF, 10%, ESR < 50 mΩ capacitor to stabilize internal VS/2 rail for analog circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Bridge Configuration | Each of 8 outputs configurable as half-, full-, or parallel-bridge - enables flexible antenna coil drive topologies across vehicle zones. |
| Destructive Signal Termination | Dedicated destroy-bit mode inserts low-Vpp pulses after transmission to actively quench residual antenna coupling - critical for secure key authentication timing. |
| Per-Channel Current Diagnostics | Sequential 5-bit ADC measurements on LS transistors - supports real-time open-load, short-to-GND, and short-to-VBAT detection per antenna. |
| Dynamic Gain Staging | Independent Gain1 (main telegram), Gain2 (initial segment), and destroy-bit gain registers - enables optimized field strength vs. EMI trade-offs. |
| Automotive Fault Latching | All faults (over-temp, under-voltage, IFAULT) latch in CSR until SPI read - ensures no diagnostic event is missed in safety-critical PEPS operation. |
Applications
| Door Handle Antenna Module | Front Fender Antenna Array |
|---|---|
Use Scenario: Embedded in driver-side door handle to detect proximity of authenticated key fob within ~1.5 m. IC Role / Device Role / Timing Role: Drives single 134.2 kHz antenna coil; generates ASK-modulated carrier; measures coil current to confirm mechanical integrity before unlocking. Use Value: Enables touchless entry with fail-safe diagnostics - detects broken wires or shorted coils before false unlock attempts. | Use Scenario: Mounted in front left/right fenders to extend passive entry range and support walk-away locking. IC Role / Device Role / Timing Role: Simultaneously drives two antennas in full-bridge mode with 180° phase offset; uses Gain2 for initial burst to overcome near-field attenuation. Use Value: Increases effective interrogation range by 30% while maintaining EMI compliance through linear-mode operation. |
| Rear Bumper Start Antenna | Center Console Authentication Node |
Use Scenario: Installed in rear bumper to enable passive engine start when key is inside cabin. IC Role / Device Role / Timing Role: Configured as parallel-bridge output driving high-Q coil; uses destroy bits to suppress cross-talk from adjacent door antennas. Use Value: Eliminates false starts caused by antenna coupling - ensures only valid key presence triggers ignition sequence. | Use Scenario: Integrated into center console to authenticate key presence during gear-shift authorization. IC Role / Device Role / Timing Role: Operates one output in half-bridge mode with programmable timer1/timer2 for precise current sampling at peak waveform amplitude. Use Value: Delivers ±5% current measurement accuracy - meets ISO 26262 ASIL-B diagnostic coverage requirements for start authorization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-frequency antenna driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPIC84134TPWPRQ1 | Identical pinout, register map, and functional spec; same HTSSOP-28 package and automotive qualification. | No functional difference - TPIC84134TPWPRQ1 is the base device; TPIC84000TPWPRQ1 is the orderable variant with identical silicon and marking. | Select TPIC84000TPWPRQ1 for production builds where TI's official orderable part number is required in BOMs. |
| MAX14790AATJ+T | 4-channel LF driver; lower integration (no internal sine-wave gen, no destroy-bit logic, no per-output current sensing). | Requires external DAC, op-amps, and discrete current sense; suited for cost-sensitive non-automotive access systems. | Choose MAX14790AATJ+T only if system uses ≤4 antennas and accepts higher design-in effort for external signal conditioning. |
Compared with TPIC84134TPWPRQ1, TPIC84000TPWPRQ1 offers identical functionality and automotive qualification but is the designated orderable part number per TI's packaging addendum; versus MAX14790AATJ+T, it delivers full 8-channel integrated diagnostics, embedded sine-wave generation, and ASK modulation support - reducing bill-of-materials count by 12 components and enabling ASIL-B compliant PEPS designs.
Availability
TPIC84000TPWPRQ1 is available at Aetrix Electronics and suitable for automotive passive entry, passive start, and keyless go systems requiring stable component supply, AEC-Q100 Grade 2 qualification, and long-term lifecycle support.
Supply support for TPIC84000TPWPRQ1 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 specializing in analog, embedded processing, and automotive ICs, with leadership in high-reliability automotive electronics.
The TPIC84000TPWPRQ1 belongs to TI's automotive antenna driver product line, engineered specifically for ISO-compliant passive entry and passive start systems - delivering integrated signal generation, diagnostics, and protection in a single AEC-Q100 qualified package.
FAQ
What is the primary function of the TPIC84000TPWPRQ1 in automotive systems?
The TPIC84000TPWPRQ1 serves as a dedicated low-frequency antenna driver IC for passive entry and passive start (PEPS) systems. It generates and controls 134.2 kHz magnetic fields via up to eight programmable half-bridge outputs, enabling secure RFID-based key authentication. Its integrated sine-wave generator, SPI-configurable gain stages, and per-channel current diagnostics make TPIC84000TPWPRQ1 essential for reliable, ASIL-B-capable vehicle access and ignition control.
Does the TPIC84000TPWPRQ1 require external components to operate?
Yes, the TPIC84000TPWPRQ1 requires several external components for proper operation: a 62 kΩ, 1%, 50 ppm resistor on RBIAS (Pin 6); a 100 nF, 10%, ESR < 50 mΩ capacitor on VS/2 (Pin 1); and decoupling capacitors on VA, VD, and VS supplies. Additionally, external antenna coils and gate resistors for MOSFETs are needed. These components are specified in the TI SLDS176 datasheet and are mandatory for TPIC84000TPWPRQ1 functional and thermal compliance.
How does the TPIC84000TPWPRQ1 handle fault conditions such as over-temperature or over-current?
The TPIC84000TPWPRQ1 implements hardware-level fault handling: over-temperature events trigger automatic transition to SLEEP mode and set latched flags in the Control and Status Register (CSR); IFAULT activates on DC current >150 mA for >4 ms or bidirectional peak current >0.9 A, forcing the affected channel into tri-state. All faults remain latched in CSR until cleared via SPI read - ensuring no diagnostic event is lost. This behavior is fully documented for TPIC84000TPWPRQ1 in TI's SLDS176 datasheet.
Can the TPIC84000TPWPRQ1 drive multiple antennas simultaneously?
Yes, the TPIC84000TPWPRQ1 supports simultaneous multi-antenna operation: up to two outputs can be activated in normal transmission mode (e.g., full-bridge pairs), while all eight outputs may be engaged concurrently using destroy-bit mode at reduced Vpp. This enables coordinated interrogation of multiple vehicle zones - such as front doors, rear bumper, and center console - with precise timing control and cross-talk suppression, as defined for TPIC84000TPWPRQ1 in its functional description.
Is the TPIC84000TPWPRQ1 pin-compatible with other TI antenna drivers?
Yes, the TPIC84000TPWPRQ1 is pin-compatible and functionally identical to TPIC84134TPWPRQ1 - sharing the same HTSSOP-28 (PWP) footprint, pin assignments, register map, and electrical specifications. TI lists TPIC84000TPWPRQ1 as the orderable part number for this silicon variant. No PCB layout changes are required when substituting between these two part numbers, as confirmed by TI's ordering information table in SLDS176.
TPIC84000TPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Passive Entry/Start
- Frequency:
- 134.2kHz
- Standards:
- -
- Interface:
- SPI
- Voltage - Supply:
- 7V ~ 38V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
TPIC84000TPWPRQ1 FAQ
1.How can I place an order for TPIC84000TPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPIC84000TPWPRQ1 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 TPIC84000TPWPRQ1 reliable?
The price and inventory of TPIC84000TPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPIC84000TPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPIC84000TPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPIC84000TPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPIC84000TPWPRQ1?
TPIC84000TPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPIC84000TPWPRQ1 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 TPIC84000TPWPRQ1?
For technical support, including TPIC84000TPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPIC84000TPWPRQ1 requirements.
6.How does Aetrix verify that TPIC84000TPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPIC84000TPWPRQ1 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 TPIC84000TPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPIC84000TPWPRQ1?
All TPIC84000TPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPIC84000TPWPRQ1, 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 TPIC84000TPWPRQ1 part is unused and in its original packaging.
Return procedure for TPIC84000TPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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