LDC3114QPWRQ1 - 4-Ch Inductive Touch LDC, AEC-Q100 | TI
부품 번호: LDC3114QPWRQ1 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 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 |
LDC3114QPWRQ1 개요
An inductance-to-digital converter (LDC) is a sensor interface IC that measures the shift in inductance of an external PCB coil caused by the proximity or deflection of a conductive metal target. Within the sensor signal-chain hierarchy, the LDC3114-Q1 sits as an analog front end (AFE) / data converter between passive inductive sensors and a host microcontroller, converting resonance frequency shifts into digital proximity or touch data transmitted over I2C.
Key features include four independent sensing channels for multi-button or multi-target designs, contactless touch sensing through a wide variety of panel materials including metal, and inductance-based linear position sensing of metal targets. Because the coil can be implemented on a small PCB located behind the panel, the technology enables fully sealed, IP-rated HMI buttons with no mechanical wear.
The hybrid architecture combines an LC oscillator front end with digital processing, outputting proximity/touch data at up to 0.16 ksps (160 samples per second) per the device description from DigiKey and datasheets.com. The I2C-compatible serial interface allows a single host to configure threshold registers and read per-channel touch status and raw proximity data.
Typical applications include automotive HMI touch buttons (steering wheel, center console, door panels), precise linear position sensing of metal targets in automotive actuators, and industrial control panels requiring sealed, durable user interfaces.
A key design consideration is coil and target geometry: sensitivity depends on coil size, target distance, and panel thickness, so the sensor coil should be tuned within the device's supported frequency range and thresholds calibrated per the TI datasheet guidance.
This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: LDC3114QPWRQ1 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LDC3114QPWRQ1 (동일 폼 팩터 및 풋프린트) — 차이점: Applications, Package.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LDC3114QPWR
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$1.8 / 개
데이터시트 보기 →LDC3114QPWT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LDC2114QPWR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LDC3114QPWRQ1
✅ 드롭인✓ 재고 있음
$1.4 / 개
데이터시트 보기 →LDC3114QPWRQ1 최대 정격 & 전기적 특성
| Product Type | 4-Channel Hybrid Inductive Touch and Inductance-to-Digital Converter |
| Number of Channels | 4 |
| 인터페이스 | I2C |
| Sample Rate | 0.16 ksps (160 sps) |
| 패키지 | 16-TSSOP (PW), 5.00 mm x 4.40 mm nominal |
| Device Marking | QDC3114 |
| Qualification | AEC-Q100 (Automotive) |
| 실장 유형 | 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 핀 구성 가이드
LDC3114QPWRQ1(16-tssop (pw), 5.00 mm x 4.40 mm nominal 패키지)의 핀 구성입니다. 이 아날로그 부품에는 입력, 출력, 전원 공급 핀이 있습니다. 오프셋 널, 보상, 인에이블 핀 구성은 제조사 데이터시트를 참조하십시오. 신호 컨디셔닝 및 증폭기 회로에 이상적입니다.
다음에 대한 상세 핀아웃 데이터 없음: LDC3114QPWRQ1.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
LDC3114QPWRQ1 적합 용도: 6 애플리케이션s: 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.
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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.
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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.
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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.
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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.
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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.
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추천 제품 요약
엔지니어링 참조 데이터: LDC3114QPWRQ1 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
| Drop-in Compatibility | Reference | Pin-to-pin, same die | Pin-to-pin, same die | Pin-compatible footprint, reduced channels |
주요 차별점
- 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))
설계 노트
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.
규정 준수 정보
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.
