LDC3114QPWRQ1 - 4-Ch Inductive Touch LDC, AEC-Q100 | TI
MPN: LDC3114QPWRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2 | $2.00 |
| 10 | $1.86 | $18.60 |
| 100 | $1.68 | $168.00 |
| 500 | $1.52 | $760.00 |
| 1,000 | $1.4 | $1,400.00 |
Drop-in alternatives for LDC3114QPWRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LDC3114QPWR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.8 / Unit
View Datasheet →LDC3114QPWT
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
LDC2114QPWR
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
LDC3114QPWRQ1
✅ Drop-In✓ In Stock
$1.4 / Unit
View Datasheet →LDC3114QPWRQ1 Maximum Ratings & Electrical Characteristics
| Product Type | 4-Channel Hybrid Inductive Touch and Inductance-to-Digital Converter |
| Number of Channels | 4 |
| Interface | I2C |
| Sample Rate | 0.16 ksps (160 sps) |
| Package | 16-TSSOP (PW), 5.00 mm x 4.40 mm nominal |
| Device Marking | QDC3114 |
| Qualification | AEC-Q100 (Automotive) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (PWR suffix) |
| Applications | Automotive HMI touch buttons, linear position sensing of metal targets |
LDC3114QPWRQ1 16-tssop (pw), 5.00 mm x 4.40 mm nominal Pin Configuration Guide
Complete pinout information for LDC3114QPWRQ1 (16-tssop (pw), 5.00 mm x 4.40 mm nominal package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LDC3114QPWRQ1.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LDC3114QPWRQ1 is suitable for 6 applications: Automotive HMI Touch Buttons, Linear Position Sensing of Metal Targets, Industrial Sealed Control Panels, Consumer Appliance and Smart Home Interfaces, Proximity and Gesture Detection, Rotary and Dial Sensing.
Automotive HMI Touch Buttons
The LDC3114QPWRQ1 is purpose-built for automotive human machine interface (HMI) touch buttons, using an AEC-Q100 qualified 4-channel inductance-to-digital front end that senses finger presence through decorative panels including metal. The PCB coil sits behind the panel, so buttons remain fully sealed against dust and moisture with no mechanical switches to wear out - a decisive advantage over capacitive sensing, which struggles behind conductive metal fascias. With the I2C interface and 0.16 ksps output rate, response latency is well within human perception limits while keeping average power low for always-on console, steering wheel, or door panel buttons. Each of the four channels can be threshold-calibrated in device registers, so a single TSSOP-16 device replaces four discrete switches in center console and climate control clusters.
Recommended
Linear Position Sensing of Metal Targets
Beyond touch, the LDC3114-Q1 performs precise linear position sensing of metal targets for automotive systems, per the TI product description. As a steel or aluminum target slides or moves relative to the PCB coil, the coil inductance shifts proportionally to target position; the device converts this shift into digital data over I2C at up to 0.16 ksps. This contactless measurement has no mechanical wear, tolerates dirt and grease, and works through non-metallic housings, making it suited to gear position, pedal position, and valve position feedback in harsh automotive environments. The four independent channels allow redundant or multi-axis sensing from one package, and the AEC-Q100 qualification supports deployment in under-hood-adjacent modules where temperature and vibration exceed consumer limits.
Recommended
Industrial Sealed Control Panels
Industrial machinery and appliances benefit from the same sealed-button architecture: the LDC3114QPWRQ1's four channels implement washable, glove-operable buttons behind stainless-steel or plastic panels, where mechanical switches fail from contamination. The inductive approach reliably rejects panel material and moisture because sensing is based on eddy-current coupling to the panel or target rather than stray capacitance. With the I2C bus, one host MCU can poll all four touch channels and apply configurable thresholds per button, while the 160 sps maximum rate keeps bus traffic and power minimal. Although the Q1 variant is automotive qualified, its ruggedness transfers directly to industrial panels exposed to cleaning agents, vibration, and wide temperature swings; use a 3.3V or 5V I2C host with appropriate pull-ups per datasheet electrical characteristics.
Recommended
Consumer Appliance and Smart Home Interfaces
Premium home appliances, cooktops, and smart home control surfaces use inductive touch to hide buttons behind glass or metal covers for a sleek, cleanable aesthetic. The LDC3114QPWRQ1's coil-behind-panel topology enables this without mechanical cutouts: the TSSOP-16 device and its PCB coil mount on the main board behind the fascia, and four channels cover typical button clusters (power, mode, plus, minus). The 0.16 ksps rate is more than sufficient for user presses, and threshold registers allow tuning sensitivity for panel thickness from sub-millimeter glass to thicker metal skins. Designers should characterize the coil-target coupling across the actual panel stack-up and set per-channel thresholds accordingly, per TI application guidance for the LDC3114 family.
Recommended
Proximity and Gesture Detection
The LDC3114-Q1 also serves as a low-power proximity sensor: a hand or metal object approaching a coil shifts inductance before contact occurs, enabling wake-on-approach, gesture zones, or liquid-level/classification sensing through container walls. Because the four channels are independent, one package can create a small gesture field (e.g., swipe left/right across two adjacent coils) or multi-zone presence detection on a dashboard. The I2C digital output eliminates analog front-end design burden, and per-channel thresholds let the host distinguish proximity events from touch events using two threshold bands. At 160 sps the device tracks hand motion adequately for simple gestures while sipping power, important for battery-backed modules; for highest-resolution proximity/waveform sensing, TI's LDC1101 offers higher resolution but only one channel.
Recommended
Rotary and Dial Sensing
By arranging coils in an arc and attaching a metal flag to a knob or shaft, the LDC3114QPWRQ1 implements contactless rotary position sensing - an automotive-grade alternative to potentiometers and Hall dial sensors. As the flag rotates, it sequentially overlaps the four channel coils; the host interpolates I2C readings across channels to derive angle with monotonic, wear-free behavior. This suits HVAC knobs, headlamp dial switches, and mode selectors where sealed, backlight-compatible panels are required. The 0.16 ksps per-channel rate captures fast knob turns for typical HMI use, and AEC-Q100 qualification covers the automotive cabin environment. Coil geometry and flag radius determine resolution; TI's inductive sensing design tools support coil simulation for the LDC3114 family before layout commitment.
Recommended
Recommended Products Summary
Engineering reference data for LDC3114QPWRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LDC3114QPWR | LDC3114QPWT | LDC2114QPWR |
|---|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) - same | 16-TSSOP (PW) - same | 16-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Sensing Channels | 4 | 4 | 4 | 2 |
| Interface | I2C | I2C | I2C | I2C |
| Output Rate | 0.16 ksps | 0.16 ksps | 0.16 ksps | [DATA_NEEDED] |
| AEC-Q100 Qualification | Yes | No (commercial grade) | Yes (Q1 variant) | [DATA_NEEDED] |
| Drop-in Compatibility | Reference | Pin-to-pin, same die | Pin-to-pin, same die | Pin-compatible footprint, reduced channels |
| Typical Price (qty 1) | USD 2.00 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Four sensing channels in one package (vs LDC2114QPWR)
- AEC-Q100 automotive qualification (vs LDC3114QPWR)
- Contactless sensing through metal panels (vs Capacitive touch alternatives (e.g., NXP/ADI options per etei.com cross-reference))
Design Notes
Place the sensor PCB coil directly beneath the panel with the shortest possible traces to the LDC3114QPWRQ1 INx pins, since trace parasitic capacitance detunes the LC tank and reduces sensitivity. Keep series resistance low by using wide traces (>=8 mil) on outer copper layers, and place the tank capacitor close to the device per the TI datasheet layout guidance. Reserve ground pour beneath the coil sparingly - solid copper under the coil adds eddy-current losses; follow the coil keep-out recommended in the datasheet.
Do not assume a commercial-grade LDC3114QPWR substitution in automotive programs: the Q1 suffix denotes AEC-Q100 qualification required by most automotive OEM specs. Also note channel count - the family includes lower-channel parts (e.g., LDC2114 with 2 channels) in similar TSSOP packages; verify the 4-channel part number before BOM release. Finally, thresholds must be recalibrated whenever panel material, thickness, or target geometry changes, since inductive sensitivity scales with target-conductor coupling.
Estimated: use a clean, well-decoupled supply rail for the LDC3114QPWRQ1 - place a 100 nF ceramic capacitor within 2 mm of the VDD pin plus bulk capacitance per datasheet recommendation. Because the device converts continuously at up to 0.16 ksps, switching-regulator ripple on the sensor rail can modulate measurement baselines; if the rail comes from a buck converter (e.g., TPS54218 family), add an RC or ferrite filter before the LDC supply pin to suppress switching artifacts in proximity data.
Route the I2C bus (SDA/SCL) with pull-up resistors sized for the bus capacitance per I2C standard practice, and keep the bus away from the sensor coils to avoid coupling digital edges into the resonance measurement. The 160 sps output rate relaxes timing, so lowering I2C speed to 100 kHz improves margin in noisy automotive harness environments. Use the ADDR pin to set a unique device address when multiple LDC devices share one bus.
Compliance Information
AEC-Q100 automotive qualification confirmed by datasheets.com listing ('automotive aec-q100') and TI Q1 suffix. RoHS/REACH/lead-free status not stated in retrieved data - verify on TI.com quality pages.
