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Texas Instruments FDC2212QDNTTQ1
- Part No.:
- FDC2212QDNTTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Sensor and Detector Interfaces
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
FDC2212QDNTTQ1.pdf
- Description:
- IC CAP-DIGITAL CONVERTER 12WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,009
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Product details
Overview
FDC2212QDNTTQ1 from Texas Instruments is a 2-channel, AEC-Q100 Grade 1 automotive-qualified capacitance-to-digital converter (CDC) with up to 28-bit resolution, 4.08 kSPS maximum output rate per active channel, and 0.3 fF RMS noise at 100 SPS with 5 MHz sensor excitation - used in proximity sensing, gesture recognition, and conductive liquid level detection.
For engineers reviewing the FDC2212QDNTTQ1 datasheet, FDC2212QDNTTQ1 pinout, FDC2212QDNTTQ1 application, or FDC2212QDNTTQ1 equivalent, key selection criteria include its narrow-band resonant architecture for EMI immunity, dual-channel differential sensing capability, I²C interface with configurable interrupt, and support for sensor excitation frequencies from 10 kHz to 10 MHz.
Technical Context
The FDC2212QDNTTQ1 employs an L-C tank resonator-based measurement architecture, converting capacitance changes into frequency shifts measured against a programmable reference clock (fREF) derived from either internal oscillator (35–55 MHz) or external CLKIN (2–40 MHz). Its core digitizes fSENSOR/fREF ratios to produce fixed-point output data.
It supports two analog input pairs (IN0A/IN0B, IN1A/IN1B) for differential capacitive sensing, with programmable settle time, RCOUNT, and FIN_SEL settings per channel. Device operation includes active, sleep (35 µA), and shutdown (200 nA) modes controlled via SD pin and I²C registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Up to 28 bits - enables sub-femtofarad capacitance discrimination for high-precision proximity or level sensing. |
| Max sample rate | 4.08 kSPS (single active channel) - supports real-time gesture response with low latency. |
| RMS noise | 0.3 fF at 100 SPS / 5 MHz fSENSOR - ensures stable baseline tracking under noisy automotive environments. |
| Supply voltage | 2.7 V to 3.6 V - compatible with standard 3.3 V automotive power domains without level shifting. |
| Sensor excitation | 10 kHz to 10 MHz - allows optimization of SNR and EMI rejection across diverse electrode geometries and target materials. |
| Operating temp | –40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood and cabin applications. |
| Interface | I²C (up to 400 kHz) - simplifies host MCU integration with standard peripheral drivers and minimal pin count. |
Pinout & Package
DNT (WSON-12) package, 4 mm × 4 mm, thermally enhanced with exposed die attach pad (DAP) tied to GND for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCL | I²C clock input | Master-synchronized timing for bidirectional communication; requires external pull-up to VDD. |
| 2 SDA | I²C data I/O | Open-drain bidirectional data line; shares bus with other I²C peripherals. |
| 3 CLKIN | External controller clock input | Optional 2–40 MHz reference source; tie to GND to enable internal oscillator. |
| 4 ADDR | I²C address select | Logic level sets I²C address: ADDR = L → 0x2A, ADDR = H → 0x2B for multi-device bus configuration. |
| 5 INTB | Configurable interrupt output | Active-low open-drain signal indicating conversion completion, threshold breach, or error condition. |
| 6 SD | Shutdown control input | Asynchronous active-low enable; places device in 200 nA shutdown state when asserted. |
| 7 VDD | Power supply | 2.7–3.6 V main supply; decoupling capacitor required near pin for noise suppression. |
| 8 GND | Ground reference | Primary return path; must be connected before DAP for reliable operation. |
| 9 IN0A / 10 IN0B | Differential sensor inputs Ch0 | Form LC tank with external inductor; supports single-ended or differential configurations via register settings. |
| 11 IN1A / 12 IN1B | Differential sensor inputs Ch1 | Independent second channel with identical excitation and measurement architecture as Ch0. |
Key Features
| Feature | Design Value |
|---|---|
| Narrow-band resonant architecture | Rejects broadband EMI (e.g., fluorescent lighting) while maintaining sensitivity - critical for in-cabin automotive sensors. |
| Programmable excitation frequency | 10 kHz–10 MHz range enables optimization of sensor SNR, response time, and PCB layout constraints. |
| Dual-channel differential sensing | Enables temperature drift compensation using one channel as reference - improves long-term stability in harsh environments. |
| Low-power operating modes | 2.1 mA active, 35 µA sleep, 200 nA shutdown - extends battery life in always-on proximity systems. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM ±2 kV and CDM ±750 V ESD robustness - suitable for safety-critical automotive zones. |
Applications
| Proximity Sensing | Gesture Recognition |
|---|---|
Use Scenario: Detecting hand presence near center console or door handle without physical contact. IC Role / Device Role / Timing Role: Measures capacitance shift between user and printed electrode; outputs digital value proportional to distance. Use Value: Enables touchless activation with <0.3 fF resolution, supporting sub-millimeter detection accuracy in ambient temperature variations. | Use Scenario: Recognizing swipe or hover gestures above infotainment display or HVAC controls. IC Role / Device Role / Timing Role: Digitizes rapid capacitance transients across two channels to infer motion direction and velocity. Use Value: Delivers 4.08 kSPS sampling and low-latency I²C readout to resolve fast gestures with minimal MCU overhead. |
| Automotive Door/Kick Sensors | Level Sensor for Conductive Liquids |
Use Scenario: Activating power liftgate or hands-free trunk opening via foot-kick detection beneath rear bumper. IC Role / Device Role / Timing Role: Interfaces with large-area ground-referenced electrodes; rejects EMI from nearby motors and inverters. Use Value: Leverages EMI-resistant architecture and AEC-Q100 qualification to operate reliably in electric vehicle drivetrain noise environments. | Use Scenario: Measuring fill level of coolant or washer fluid in plastic reservoirs using parallel-plate electrodes. IC Role / Device Role / Timing Role: Converts conductive liquid-induced capacitance change into linear digital output calibrated to volume. Use Value: Supports up to 250 nF sensor capacitance with 28-bit resolution - accommodates large electrode areas and low-permittivity fluids. |
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 |
|---|---|---|---|
| FDC2214QDSGRQ1 | 4-channel variant in RGH (WQFN-16) package; identical resolution, noise, and excitation specs. | Supports additional sensor inputs for multi-zone sensing (e.g., full-door capacitive array). | Select when >2 sensing zones are required; board layout must accommodate larger 4×4 mm 16-pin footprint. |
| FDC2112QDNTTQ1 | 12-bit resolution (vs. 28-bit), higher 13.3 kSPS rate, same 2-channel DNT package and AEC-Q100 Grade 1 rating. | Better suited for cost-sensitive, lower-precision proximity detection where ultra-fine resolution is unnecessary. | Choose for simpler firmware, reduced processing load, and tighter BOM cost - trade resolution for speed and simplicity. |
Compared with FDC2214QDSGRQ1, FDC2212QDNTTQ1 saves board space and reduces channel count complexity; compared with FDC2112QDNTTQ1, it delivers 16-bit deeper resolution essential for detecting minute capacitance shifts in fluid level or fine-gesture applications.
Availability
FDC2212QDNTTQ1 is available at Aetrix Electronics and suitable for automotive proximity sensing, gesture recognition, and conductive liquid level monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for FDC2212QDNTTQ1 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 and embedded processing technologies, with deep expertise in automotive-grade signal conditioning and sensing solutions.
The FDC2x1x-Q1 product line was designed specifically for high-reliability capacitive sensing in automotive interiors and exteriors - emphasizing EMI resilience, temperature stability, and functional safety readiness.
FAQ
What is the maximum sensor capacitance supported by the FDC2212QDNTTQ1?
The FDC2212QDNTTQ1 supports up to 250 nF sensor capacitance when paired with a 1 mH inductor at 10 kHz oscillation frequency. This high input capacitance range enables use with large-area electrodes or low-permittivity media such as plastic fuel tanks or washer fluid reservoirs - critical for automotive level sensing applications where electrode geometry is constrained by mechanical packaging.
Does the FDC2212QDNTTQ1 require an external crystal or oscillator?
No, the FDC2212QDNTTQ1 integrates an internal oscillator (35–55 MHz) and can operate without external timing components. The CLKIN pin may be tied to GND to enable internal clocking; alternatively, a precision external clock (2–40 MHz) can be applied for improved frequency stability in high-accuracy applications - giving designers flexibility in cost, board space, and performance trade-offs for the FDC2212QDNTTQ1.
How does the FDC2212QDNTTQ1 achieve EMI immunity in automotive environments?
The FDC2212QDNTTQ1 uses a narrow-band resonant sensing architecture that measures only within a tightly defined frequency band around the sensor's LC oscillation frequency. This inherently rejects out-of-band noise from sources like ignition systems, DC-DC converters, and LED lighting - validated by AEC-Q100 ESD testing and real-world deployment in cabin and exterior automotive modules using the FDC2212QDNTTQ1.
What is the function of the ADDR pin on the FDC2212QDNTTQ1?
The ADDR pin on the FDC2212QDNTTQ1 selects the device's I²C slave address: logic low sets address 0x2A, logic high sets 0x2B. This allows two FDC2212QDNTTQ1 devices to share the same I²C bus without address conflict - useful in multi-sensor systems such as dual-door handle detection or redundant level sensing, ensuring scalable system architecture for the FDC2212QDNTTQ1.
Can the FDC2212QDNTTQ1 operate in single-channel mode?
Yes, the FDC2212QDNTTQ1 supports both single- and dual-channel operation via I²C register configuration. In single-channel mode, it continuously samples one selected channel (Ch0 or Ch1), reducing conversion latency and simplifying firmware - ideal for dedicated proximity triggers. Dual-channel mode enables synchronized acquisition or temperature-compensated measurements, making the FDC2212QDNTTQ1 adaptable to varying system requirements.
FDC2212QDNTTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 12-WFDFN 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:
- 12-WSON (4x4)
FDC2212QDNTTQ1 FAQ
1.How can I place an order for FDC2212QDNTTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for FDC2212QDNTTQ1 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 FDC2212QDNTTQ1 reliable?
The price and inventory of FDC2212QDNTTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FDC2212QDNTTQ1 is usually 5 days.
3.What payment methods are accepted for FDC2212QDNTTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FDC2212QDNTTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FDC2212QDNTTQ1?
FDC2212QDNTTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FDC2212QDNTTQ1 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 FDC2212QDNTTQ1?
For technical support, including FDC2212QDNTTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FDC2212QDNTTQ1 requirements.
6.How does Aetrix verify that FDC2212QDNTTQ1 is sourced from the original manufacturer or authorized distributors?
All FDC2212QDNTTQ1 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 FDC2212QDNTTQ1 meets industry standards.
7.What is the process for return or replacement of FDC2212QDNTTQ1?
All FDC2212QDNTTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with FDC2212QDNTTQ1, 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 FDC2212QDNTTQ1 part is unused and in its original packaging.
Return procedure for FDC2212QDNTTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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