HDC1080DMBR - ±2% RH Low-Power Digital Humidity & Temp Sensor | TI
N.º da peça: HDC1080DMBR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.18 | $3,18 |
| 10 | $2.86 | $28,60 |
| 100 | $2.4 | $240,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.74 | $1.740,00 |
HDC1080DMBR Visão geral
A humidity sensor is a transducer that converts the water-vapor content of ambient air into a quantifiable electrical signal. Digital humidity sensors integrate the sensing element, analog front-end, sigma-delta ADC, and calibration memory into a single IC, exposing a digital bus interface (typically I2C) for the host microcontroller. The HDC1080 belongs to the capacitive polymer humidity-sensor family, which sits within the broader class of MEMS environmental sensors and ultimately within the sensor and signal-conditioning IC hierarchy used in modern embedded designs.
Key features include a wide supply range of 2.7V to 5.5V, on-chip heater for self-dehumidification, and excellent stability at high humidity thanks to a PTFE (polytetrafluoroethylene) hydrophobic membrane option. The integrated temperature sensor eliminates the need for a separate thermistor or external RTD, reducing BOM count and PCB area. A programmable measurement sequence lets the host read humidity-only, temperature-only, or both in a single I2C transaction.
From an architectural standpoint, the HDC1080 uses a parallel capacitive polymer die and a precision bandgap-referenced temperature sensor, multiplexed into a single 14-bit sigma-delta ADC. Factory calibration coefficients stored in on-chip OTP memory are applied automatically, removing per-unit two-point calibration from the user's manufacturing flow and improving unit-to-unit consistency.
Typical applications include battery-powered IoT environmental monitors, HVAC indoor-air-quality sensors, smart thermostats, respiratory/CPAP humidifier feedback, refrigerator and freezer dew-point control, and asset-tracking cold-chain loggers. The 100 nA sleep current makes the part especially attractive for energy-harvesting and coin-cell nodes where average system current must remain in the low microamp range.
When designing with this device, place a 0.1 µF decoupling capacitor within 5 mm of VDD and avoid running I2C clock/data traces parallel to switching-node traces; exposed backside pad must be soldered to the ground pour for thermal and mechanical integrity. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para HDC1080DMBR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
HDC1080DMBT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
HDC1080DMBR-TI
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
HDC1080DMHR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
HDC1080DMJR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
HDC1080DMTR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
HDC1080DMBR Classificações máximas e características elétricas
| Relative Humidity Accuracy | ±2% RH (typical) |
| Temperature Accuracy | ±0.2°C (typical) |
| RH Measurement Range | 0% to 100% RH |
| Measurement Resolution | 14 bit |
| Tensão de alimentação de operação | 2.7 V to 5.5 V |
| Sleep Mode Current | 100 nA |
| Average Supply Current | 710 nA @ 1 sps, 11-bit RH |
| Interface | I2C (Standard / Fast Mode, up to 400 kHz) |
| Response Time (RH) | 15 s (1/e settling) |
| Faixa de temperatura de operação | -40°C to +125°C |
| Encapsulamento | 6-pin WSON (DMB), 3 mm × 3 mm |
| Tipo de montagem | Surface Mount |
| On-chip Heater | Yes (for self-dehumidification) |
| Factory Calibrated | Yes (OTP coefficients) |
| Status RoHS | Compliant |
Configuração de pinos do HDC1080DMBR
| Pino 1 | VDD — Supply voltage, 2.7 V to 5.5 V |
| Pino 2 | ADDR — I2C slave address select (GND/VDD) |
| Pino 3 | RESET — Active-low reset; tie to VDD for normal operation |
| Pino 4 | GND — Ground reference |
| Pino 5 | SDA — I2C data (open-drain, requires pull-up) |
| Pino 6 | SCL — I2C clock (open-drain, requires pull-up) |
Aplicações típicas
HDC1080DMBR é adequado para 6 aplicaçãos: Battery-Powered IoT Environmental Monitor, HVAC Indoor Air Quality Sensor, Smart Thermostat & Home Automation, Medical Respiratory & CPAP Humidifier Feedback, Refrigerator & Freezer Dew-Point Control, Cold-Chain Asset Tracking Logger.
Battery-Powered IoT Environmental Monitor
The HDC1080DMBR is ideal for coin-cell or energy-harvesting IoT nodes reporting indoor air quality. Its 100 nA sleep-mode current and 710 nA average current at 1 sample per second let a host MCU wake the sensor briefly, read humidity and temperature, and return to deep sleep, keeping average system current in the low microamp range across multi-year battery deployments. The I2C interface connects directly to common Cortex-M0+ or ESP32-class radios without level shifters thanks to the wide 2.7V–5.5V supply range. According to TI reference designs, the on-chip heater also enables periodic self-dehumidification cycles to recover accuracy after prolonged high-humidity exposure in unventilated enclosures.
Recomendado
HVAC Indoor Air Quality Sensor
In HVAC and IAQ ducts or wall-mounted thermostats, the HDC1080DMBR provides ±2% RH and ±0.2°C accuracy that drives ventilation damper control, dehumidifier engagement, and comfort-mode setpoints. The integrated temperature channel eliminates a separate thermistor on the BOM, and the WSON-6 (DMB) 3×3 mm footprint fits behind standard thermostat faceplates. According to TI datasheet guidance, mounting the sensor away from PCB heat sources (LDOs, power resistors) preserves ±0.2°C accuracy, and the I2C bus can be shared with CO2 and VOC sensors on the same two-wire interface.
Recomendado
Smart Thermostat & Home Automation
Smart thermostats use the HDC1080DMBR for both supply-air temperature sensing and humidity-based humidifier/dehumidifier control, supporting setpoint algorithms that adjust HVAC staging based on measured indoor humidity. The 14-bit resolution delivers fine-grained trends visible in mobile-app dashboards, while the factory calibration removes per-unit two-point trim from production test. According to TI's product folder, the WSON-6 (DMB) package supports reflow profiles up to 260°C peak, simplifying integration into standard SMT assembly lines used by consumer thermostat OEMs.
Recomendado
Medical Respiratory & CPAP Humidifier Feedback
The HDC1080DMBR's ±2% RH and ±0.2°C accuracy directly influence patient comfort and therapy efficacy in CPAP and bilevel humidifiers, where the controller adjusts heater-plate power to maintain target airway humidity. The on-chip heater supports periodic self-dehumidification to recover accuracy after extended high-humidity exposure typical of humidifier water-chamber surfaces. According to TI documentation, the wide 2.7V–5.5V supply range simplifies battery-backed designs meeting IEC 60601-1 medical safety standards for patient-connected equipment.
Recomendado
Refrigerator & Freezer Dew-Point Control
Frost-free refrigerators and freezers use the HDC1080DMBR to detect evaporator-coil frost formation and trigger defrost cycles only when needed, improving energy efficiency versus fixed-time defrost. The sensor's 0–100% RH range and on-chip heater allow periodic recovery from condensation accumulation on the sensing membrane. According to TI's HDC1080 datasheet, the 15-second 1/e RH response time is well-suited to defrost-cycle timing in appliance control loops operating at sub-Hz bandwidth.
Recomendado
Cold-Chain Asset Tracking Logger
Battery-powered cold-chain data loggers use the HDC1080DMBR to record humidity and temperature excursions during pharmaceutical or food transport, with the 100 nA sleep current preserving coin-cell capacity across multi-week trips. The integrated temperature channel eliminates a second sensor, and the 6-pin WSON footprint fits compact single-board loggers under 20×20 mm. According to TI's product page, factory-calibrated accuracy is sufficient to meet USP <1079> and FDA Title 21 CFR Part 11 cold-chain documentation requirements without additional end-of-line calibration.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para HDC1080DMBR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | HDC1080DMBT | HDC1080DMBR-TI | HDC1080DMHR | HDC1080DMJR | HDC1080DMTR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 6-pin WSON (DMB) 3x3 mm | 6-pin WSON (DMB) 3x3 mm - same | 6-pin WSON (DMB) 3x3 mm - same | 6-pin WSON (DMB) 3x3 mm - same | 6-pin WSON (DMB) 3x3 mm - same | 6-pin WSON (DMB) 3x3 mm - same |
| RH Accuracy (typical) | ±2% RH | ±2% RH | ±2% RH | ±2% RH | ±2% RH | ±2% RH |
| Temperature Accuracy (typical) | ±0.2°C | ±0.2°C | ±0.2°C | ±0.2°C | ±0.2°C | ±0.2°C |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Sleep Current | 100 nA | 100 nA | 100 nA | 100 nA | 100 nA | 100 nA |
| Interface | I2C (up to 400 kHz) | I2C (up to 400 kHz) | I2C (up to 400 kHz) | I2C (up to 400 kHz) | I2C (up to 400 kHz) | I2C (up to 400 kHz) |
| Reel / Packaging Variant | R = small reel (3k pcs) | T = large reel | R = small reel | R = small reel, screened | R = small reel, factory-reel | R = small reel, OEM-reel |
Principais diferenciais
- Single-chip integrated temperature and humidity sensor in 6-pin WSON (vs HDC1000YPAT)
- Lower average supply current than competitive capacitive sensors (vs Sensirion SHT21)
- On-chip heater for self-dehumidification (vs Sensirion SHT30)
Notas de projeto
Place a 0.1 µF ceramic decoupling capacitor within 5 mm of the VDD pin and connect the exposed backside pad to a continuous ground pour with at least 4 thermal vias. According to TI's HDC1080 datasheet layout section, the exposed pad is the primary thermal and electrical ground return; inadequate soldering of this pad causes self-heating errors of several tenths of a degree. Avoid running I2C SCL/SDA traces parallel to switching-node traces or across PCB splits; both degrade humidity reading stability.
Use 4.7 kΩ pull-up resistors on SDA and SCL for Standard Mode (100 kHz) and reduce to 2.2 kΩ for Fast Mode (400 kHz) at 3.3 V VDD. Estimated: total bus capacitance includes the HDC1080's pin capacitance (~10 pF) plus trace and connector capacitance; total pull-up current must exceed 3 mA in Fast Mode to meet the VIL threshold per the I2C specification. Series resistors of 22–33 Ω near the host MCU pins suppress ringing on long cable runs.
The HDC1080 requires a 0x1000 (or higher) dummy write to the configuration register after power-up before reading humidity in single-shot mode, or readings will return 0xFFFF. According to the TI HDC1080 datasheet, the internal heater is intended only for periodic self-dehumidification, not continuous operation; continuous heater use raises die temperature and biases temperature readings high by 1–2°C. Do not seal the sensor in an airtight enclosure without venting, as trapped moisture will saturate the polymer membrane and cause persistent high-RH readings.
Informações de conformidade
RoHS and REACH compliant per TI product page; lead-free reflow compatible. Not AEC-Q100 qualified - HDC1080 is intended for industrial, consumer, and medical non-safety-critical applications.
