My Inquiry
My Account
Texas Instruments FDC2114QRGHTQ1
- Part No.:
- FDC2114QRGHTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Sensor and Detector Interfaces
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
FDC2114QRGHTQ1.pdf
- Description:
- IC CAP-DIGITAL CONVERTER 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,365
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FDC2114QRGHTQ1 from Texas Instruments is a 4-channel, automotive-grade capacitance-to-digital converter (CDC) for high-precision capacitive sensing. It delivers up to 28-bit resolution, supports sensor excitation frequencies from 10 kHz to 10 MHz, achieves 13.3 kSPS maximum output rate per active channel, and operates across –40°C to +125°C ambient temperature - enabling robust proximity and gesture sensing in automotive door/kick detection systems.
For engineers reviewing the FDC2114QRGHTQ1 datasheet, FDC2114QRGHTQ1 pinout, FDC2114QRGHTQ1 application, or FDC2114QRGHTQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, narrow-band resonant architecture for EMI immunity, I²C interface with configurable interrupt, and support for differential LC tank sensors up to 250 nF.
Technical Context
The FDC2114QRGHTQ1 employs an L-C resonant tank architecture - not switched-capacitor - measuring capacitance via frequency shift of an oscillating LC circuit. Its core digitizes the ratio fSENSOR/fREF, where fREF is derived either from an internal 43.4 MHz oscillator (±13 ppm/°C TC) or an external clock up to 40 MHz.
It supports true 4-channel operation with programmable per-channel settings: independent fSENSOR division (CHx_FIN_SEL), fREF division (CHx_FREF_DIVIDER), settle count (SETTLECOUNT_CHx), and RCOUNT (0xFFFF for full 28-bit mode). Channel sequencing includes sensor activation, conversion, and switch delay - all configurable for optimal SNR and throughput trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Up to 28 bits - enables sub-femtofarad detection (0.3 fF RMS noise at 100 SPS), critical for high-sensitivity liquid level or proximity sensing. |
| Max sample rate | 13.3 kSPS per active channel - supports real-time gesture recognition with low latency. |
| Sensor capacitance range | Up to 250 nF at 10 kHz - accommodates large-area or shielded electrodes without external buffering. |
| Excitation frequency | 10 kHz – 10 MHz - allows optimization for EMI immunity (low-f) or resolution/noise floor (high-f). |
| Supply & power | 2.7–3.6 V; 2.1 mA active, 35 µA sleep, 200 nA shutdown - suitable for battery-backed automotive modules. |
| Interface | I²C (up to 400 kHz) with configurable INTB and ADDR pins - enables multi-device addressing and host interrupt-driven polling. |
| Temp range | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and cabin applications. |
Pinout & Package
Package: RGH (WQFN-16), 4 mm × 4 mm, exposed thermal pad (DAP) electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | I²C clock input | Master-generated clock; supports standard/fast-mode I²C up to 400 kHz. |
| SDA | I²C bidirectional data line | Open-drain I/O with internal pull-up capability; requires external pull-up for bus operation. |
| CLKIN | External controller clock input | Accepts 2–40 MHz clock; tie to GND to select internal oscillator (43.4 MHz typical). |
| ADDR | I²C address select | Logic low = 0x2A, logic high = 0x2B - enables dual-device addressing on same I²C bus. |
| INTB | Configurable interrupt output | Active-low, open-drain; asserts on data ready, error, or watchdog timeout per register configuration. |
| SD | Shutdown control input | Logic high = shutdown (200 nA); logic low = active - provides hardware-level power gating. |
| VDD / GND | Power supply and ground | Separate analog/digital ground not required; DAP must be connected to system GND for thermal and noise performance. |
| IN0A/IN0B–IN3A/IN3B | Differential capacitive sensor inputs | Four fully independent LC tank interfaces; each pair forms a resonant circuit with external inductor and sensor capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, including HBM ±2 kV and CDM ±750 V ESD robustness. |
| Narrow-band resonant architecture | Rejects broadband EMI (e.g., fluorescent lighting noise) while maintaining >100 dB dynamic range at 28-bit resolution. |
| Programmable per-channel timing | Independent RCOUNT, SETTLECOUNT, and FIN_SEL registers per channel enable optimized SNR and throughput per sensor. |
| Internal 43.4 MHz oscillator | Eliminates external crystal; ±13 ppm/°C tempco supports cost-sensitive designs where absolute accuracy is secondary to stability. |
| Differential LC sensing | Each channel uses matched INxA/INxB inputs - rejects common-mode noise and enables shielded electrode layouts. |
Applications
| Automotive Door Handle Sensing | Conductive Liquid Level Monitoring |
|---|---|
Use Scenario: Capacitive sensor embedded in vehicle door handle detects hand proximity without physical contact, triggering unlock sequence. IC Role / Device Role / Timing Role: FDC2114QRGHTQ1 measures femtofarad-level capacitance shifts from hand approach using differential LC tank on IN0A/IN0B. Use Value: Enables reliable wake-up from ultra-low-power sleep mode (35 µA), with <2 ms wake-up latency after SD assertion - meeting OEM passive entry response requirements. | Use Scenario: Stainless-steel probe immersed in fuel tank measures capacitance change as liquid level rises/falls. IC Role / Device Role / Timing Role: FDC2114QRGHTQ1 digitizes capacitance of conductive liquid column via IN2A/IN2B with 250 nF max sensor support and 0.3 fF noise floor. Use Value: Delivers <0.5% full-scale linearity over temperature using dual-channel ratiometric measurement (sensor + reference tank), eliminating drift-induced calibration drift. |
| Automotive Kick Sensor | In-Cabin Gesture Recognition |
Use Scenario: Floor-mounted capacitive strip detects foot motion beneath rear bumper to trigger hands-free liftgate opening. IC Role / Device Role / Timing Role: FDC2114QRGHTQ1 samples four spatially distributed electrodes (IN0A/B–IN3A/B) at 13.3 kSPS to resolve kick trajectory and velocity. Use Value: Multi-channel interleaving enables real-time position interpolation without external multiplexers - reducing BOM count and PCB area by >30% vs discrete CDC solutions. | Use Scenario: Dashboard-mounted capacitive array detects swipe, tap, and hover gestures for infotainment control. IC Role / Device Role / Timing Role: FDC2114QRGHTQ1 drives high-frequency (5–10 MHz) LC tanks on IN1A/B and IN3A/B to maximize SNR in noisy cabin RF environments. Use Value: EMI-resistant narrow-band architecture maintains >80 dB SNR even near Bluetooth/WiFi transceivers - eliminating false triggers during concurrent wireless operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitance-to-digital conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FDC2214QRGHTQ1 | Same package and pinout; supports 28-bit resolution across all channels (vs FDC2114QRGHTQ1's 12-bit default, upgradable to 28-bit via RCOUNT) | Higher-resolution liquid level or precision proximity where >12-bit raw data is required without post-processing | Select FDC2214QRGHTQ1 when full 28-bit conversion is needed per channel without firmware-based averaging. |
| AD7746ARMZ | 2-channel, 24-bit CDC; uses sigma-delta architecture; no resonant tank support; requires external excitation | Lower-cost industrial sensing where EMI immunity is less critical and LC tank complexity is undesirable | Choose AD7746ARMZ for simpler single-ended capacitive sensors and non-automotive environments lacking AEC-Q100 requirements. |
Compared with FDC2214QRGHTQ1, the FDC2114QRGHTQ1 offers identical automotive qualification and pin compatibility but defaults to 12-bit output - reducing host MCU processing load for gesture detection. Versus AD7746ARMZ, it provides superior EMI rejection and integrated LC drive but requires external inductors and tighter layout control.
Availability
FDC2114QRGHTQ1 is available at Aetrix Electronics and suitable for automotive proximity sensing, conductive liquid level monitoring, in-cabin gesture recognition, and hands-free liftgate activation requiring stable component supply across extended temperature and lifecycle demands.
Supply support for FDC2114QRGHTQ1 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 automotive ICs, with decades of expertise in high-reliability signal conditioning and sensor interface solutions.
The FDC2x1x-Q1 product line was designed specifically for automotive capacitive sensing - delivering AEC-Q100 qualified, EMI-hardened CDCs that replace mechanical switches and optical sensors in safety-critical human-machine interfaces.
FAQ
What is the maximum sensor capacitance supported by the FDC2114QRGHTQ1?
The FDC2114QRGHTQ1 supports up to 250 nF sensor capacitance when used with a 1 mH inductor at 10 kHz oscillation frequency. This value is specified in the Electrical Characteristics table and validated under recommended operating conditions. The device maintains usable SNR and linearity within this range, making it suitable for large-area or shielded electrodes in automotive door handle and kick sensor applications. Exceeding 250 nF may degrade measurement stability and increase susceptibility to parasitic coupling.
Does the FDC2114QRGHTQ1 require an external crystal or oscillator?
No, the FDC2114QRGHTQ1 integrates a 43.4 MHz internal oscillator with ±13 ppm/°C temperature coefficient, eliminating the need for an external crystal. The CLKIN pin can be tied to GND to select internal clocking. An external clock (2–40 MHz) is optional and recommended only for applications demanding higher timing precision - such as synchronized multi-sensor systems or metrology-grade liquid level sensing. The internal oscillator is sufficient for most automotive proximity and gesture applications.
How many capacitive sensing channels does the FDC2114QRGHTQ1 support?
The FDC2114QRGHTQ1 supports four independent capacitive sensing channels, implemented as two differential pairs: IN0A/IN0B, IN1A/IN1B, IN2A/IN2B, and IN3A/IN3B. Each channel can be configured individually for excitation frequency division, reference clock division, settle time, and resolution. All four channels are simultaneously addressable and can be scanned in auto-sequencing mode or operated individually in single-channel mode - confirmed in the Pin Configuration and Functional Block Diagram sections of the official datasheet.
What is the resolution of the FDC2114QRGHTQ1, and how is it configured?
The FDC2114QRGHTQ1 delivers up to 28-bit resolution, achieved by setting the RCOUNT register to 0xFFFF and reading both DATA_CHx (12 MSBs) and DATA_LSB_CHx (16 LSBs) registers per channel. By default, it outputs 12-bit values (0x000–0xFFF), but full 28-bit mode is enabled via register configuration. This dual-mode capability allows designers to balance data throughput, memory usage, and precision - for example, using 12-bit mode for fast gesture detection and 28-bit mode for high-accuracy liquid level calibration.
Is the FDC2114QRGHTQ1 compatible with I²C standard-mode and fast-mode speeds?
Yes, the FDC2114QRGHTQ1 supports I²C standard-mode (100 kHz) and fast-mode (400 kHz) operation, as specified in Section 5.7 "Switching Characteristics – I²C" of the datasheet. Its timing parameters - including tLOW (1.3 μs min), tHIGH (0.6 μs min), and tSU;DAT (100 ns min) - comply fully with I²C fast-mode specifications. The SDA and SCL pins are open-drain with internal weak pull-ups, requiring external pull-up resistors sized per bus capacitance and target speed - ensuring interoperability with standard microcontrollers and automotive domain controllers.
FDC2114QRGHTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Interface
- Input Type:
- Capacitive
- Output Type:
- I2C
- Current - Supply:
- 2.1 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WQFN (4x4)
FDC2114QRGHTQ1 FAQ
1.How can I place an order for FDC2114QRGHTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for FDC2114QRGHTQ1 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 FDC2114QRGHTQ1 reliable?
The price and inventory of FDC2114QRGHTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDC2114QRGHTQ1 is usually 5 days.
3.What payment methods are accepted for FDC2114QRGHTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDC2114QRGHTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FDC2114QRGHTQ1?
FDC2114QRGHTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FDC2114QRGHTQ1 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 FDC2114QRGHTQ1?
For technical support, including FDC2114QRGHTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDC2114QRGHTQ1 requirements.
6.How does Aetrix verify that FDC2114QRGHTQ1 is sourced from the original manufacturer or authorized distributors?
All FDC2114QRGHTQ1 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 FDC2114QRGHTQ1 meets industry standards.
7.What is the process for return or replacement of FDC2114QRGHTQ1?
All FDC2114QRGHTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with FDC2114QRGHTQ1, 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 FDC2114QRGHTQ1 part is unused and in its original packaging.
Return procedure for FDC2114QRGHTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FDC2114QRGHTQ1 Tags
-
RE46C100S8TF
Microchip Technology
-
XTR111AIDRCR
Texas Instruments
-
XTR111AIDGQR
Texas Instruments
-
XTR117AIDGKR
Texas Instruments
-
XTR111AIDGQT
Texas Instruments
-
XTR115UA/2K5
Texas Instruments
-
MAX14626ETT+T
Analog Devices Inc./Maxim Integrated
-
XTR116UA/2K5
Texas Instruments
-
XTR115U/2K5
Texas Instruments
-
XTR116U/2K5
Texas Instruments
-
PGA308AIDGSR
Texas Instruments
-
XTR300AIRGWR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
