STTS751 - 1.8V to 3.6V Digital Temperature Sensor | STMicroelectronics
料号： STTS751 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.98 | $98.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.72 | $720.00 |
STTS751 概述
A digital temperature sensor is an integrated circuit that converts ambient temperature into a digital output, typically using an internal bandgap reference and an analog-to-digital converter (ADC). It belongs to the broader category of temperature sensors, which are essential in thermal management systems for monitoring and protecting electronic components. Digital temperature sensors like the STTS751 are preferred over analog sensors (e.g., thermistors) because they provide direct digital readout, eliminate the need for calibration, and can be easily interfaced with microcontrollers via standard communication protocols such as I2C or SMBus.
Key features of the STTS751 include a programmable resolution (9 to 12 bits), an SMBus-compatible interface with up to 400 kHz clock frequency, and a standby current of only 3.5 µA (typical) to extend battery life in portable applications. The device also supports a one-shot mode for single temperature readings, which reduces power consumption further. The operating temperature range is -40°C to +125°C, making it suitable for a wide range of environments.
The STTS751 uses a sigma-delta ADC architecture to achieve high accuracy and low noise. It includes an on-chip oscillator and a digital comparator that can generate an interrupt (ALERT) when the temperature exceeds programmable high or low limits. The device also features a shutdown mode that reduces current consumption to 0.5 µA (typical), ideal for power-sensitive designs.
Typical applications include system thermal management in laptops, servers, and industrial controllers; battery temperature monitoring in smartphones and tablets; and environmental monitoring in IoT devices. The small UDFN package and low power consumption make it an excellent choice for space-constrained, battery-powered designs.
When designing with the STTS751, ensure proper PCB layout to minimize thermal coupling from other heat sources. Place the sensor away from power components and provide adequate copper pour for heat dissipation. The I2C address is set by the ADD0 pin, allowing up to two devices on the same bus.
直接替换替代料： STTS751 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TMP102
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STTS751 最大额定值与电气特性
| Supply Voltage Range | 1.8 V to 3.6 V |
| Temperature Accuracy | ±1°C (typical) from +75°C to +95°C |
| Temperature Range | -40°C to +125°C |
| 分辨率 | 9 to 12 bits (programmable) |
| 接口 | I2C/SMBus (up to 400 kHz) |
| Standby Current | 3.5 µA (typical) |
| 关断电流 | 0.5 µA (typical) |
| Conversion Time | Up to 210 ms (12-bit) |
| 封装 | 6-pin UDFN (2x2 mm) |
| 工作温度范围 | -40°C to +125°C |
| 输出类型 | Digital (I2C/SMBus) |
| Number of Channels | 1 |
| ALERT Output | Yes (programmable high/low limits) |
| One-Shot Mode | Yes |
| RoHS 状态 | Compliant |
STTS751 引脚配置
| 引脚 1 | SDA — I2C data line (open-drain) |
| 引脚 2 | SCL — I2C clock line |
| 引脚 3 | ALERT — Temperature alert output (open-drain, active low) |
| 引脚 4 | ADD0 — I2C address select pin |
| 引脚 5 | VDD — Power supply (1.8V to 3.6V) |
| 引脚 6 | GND — Ground |
典型应用
STTS751 适用于 6 应用s: System Thermal Management, Battery Temperature Monitoring, IoT Environmental Monitoring, Industrial Process Control, Automotive Climate Control, Medical Device Monitoring.
System Thermal Management
The STTS751 monitors CPU, GPU, or system ambient temperature in laptops, servers, and industrial controllers. Its high accuracy (±1°C) and programmable ALERT output enable proactive cooling fan control and thermal shutdown protection. The I2C interface allows easy integration with system management controllers (e.g., BMC) for real-time temperature monitoring. The low supply voltage (1.8V-3.6V) is compatible with modern low-power processors. In a typical laptop, the STTS751 is placed near the CPU heatsink, and its ALERT pin triggers a fan speed increase when temperature exceeds a set threshold, preventing overheating and improving system reliability.
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Battery Temperature Monitoring
In smartphones, tablets, and power banks, the STTS751 monitors battery temperature to prevent thermal runaway and optimize charging. Its ultra-low standby current (3.5 µA) extends battery life, and the small UDFN package fits compact designs. The one-shot mode allows periodic temperature readings without continuous power consumption. The device can be placed on the battery pack, and its ALERT output can trigger a charge current reduction or shutdown if the temperature exceeds safe limits. The I2C interface connects directly to the battery management IC or host processor.
推荐
IoT Environmental Monitoring
The STTS751 is used in IoT nodes to measure ambient temperature for smart home, agriculture, and industrial monitoring. Its low power consumption (3.5 µA standby) is ideal for battery-powered sensors that wake up periodically to take readings. The I2C interface allows connection to low-power MCUs like the ESP32 or STM32L0. The device's small size and wide temperature range (-40°C to +125°C) make it suitable for outdoor deployments. In a typical IoT node, the STTS751 is read every minute, and the data is transmitted via LoRa or BLE to a cloud platform for analysis.
推荐
Industrial Process Control
The STTS751 monitors temperature in industrial equipment such as motor drives, power supplies, and PLCs. Its accuracy and wide operating range ensure reliable operation in harsh environments. The ALERT output can trigger alarms or shutdowns to prevent equipment damage. The I2C interface allows integration with industrial microcontrollers and PLCs. In a motor drive, the STTS751 is mounted on the heatsink, and its temperature reading is used to derate the motor current at high temperatures, improving system safety and longevity.
推荐
Automotive Climate Control
The STTS751 is used in automotive HVAC systems to monitor cabin temperature and control heating/cooling. Its wide temperature range and accuracy make it suitable for automotive environments. The device operates from a 1.8V-3.6V supply, which is compatible with automotive low-voltage rails. The I2C interface connects to the body control module (BCM) or climate control unit. In a typical application, the STTS751 is placed in the dashboard, and its readings are used to adjust the blower speed and temperature setpoint for passenger comfort.
推荐
Medical Device Monitoring
The STTS751 is used in medical devices such as patient monitors, infusion pumps, and diagnostic equipment to monitor ambient or component temperature. Its accuracy and low power consumption are critical for battery-operated devices. The small package allows integration into compact medical devices. The I2C interface enables communication with medical-grade microcontrollers. In a patient monitor, the STTS751 can monitor the temperature of the device's internal components to prevent overheating, ensuring reliable operation in clinical settings.
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推荐产品汇总
工程参考数据： STTS751 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STTS75 | TMP102 | MCP9808 |
|---|---|---|---|---|
| Package | 6-pin UDFN (2x2 mm) | SO-8 | SOT-563 | MSOP-8 |
| Brand | STMicroelectronics | STMicroelectronics | Texas Instruments | Microchip Technology |
| Supply Voltage Range | 1.8V to 3.6V | 2.7V to 5.5V | 1.4V to 3.6V | 2.7V to 5.5V |
| Temperature Accuracy | ±1°C (typical) from +75°C to +95°C | ±2°C (typical) | ±0.5°C (typical) | ±0.25°C (typical) |
| Resolution | 9 to 12 bits | 9 to 12 bits | 12 bits | 13 bits |
| Interface | I2C/SMBus (up to 400 kHz) | I2C/SMBus (up to 400 kHz) | I2C/SMBus (up to 400 kHz) | I2C (up to 400 kHz) |
| Standby Current | 3.5 µA (typical) | 1 µA (typical) | 10 µA (typical) | 0.2 µA (typical) |
| ALERT Output | Yes | Yes | Yes | Yes |
关键差异点
- Ultra-low standby current of 3.5 µA （对比 TMP102)
- Compact 2x2 mm UDFN package （对比 TMP102)
- Wide supply voltage range down to 1.8V （对比 STTS75)
设计说明
Place the STTS751 away from heat-generating components (e.g., voltage regulators, high-power resistors) to ensure accurate ambient temperature measurement. Provide a solid ground plane under the device to improve thermal coupling to the PCB and reduce measurement errors. For best accuracy, avoid routing high-current traces directly beneath the sensor.
Decouple the VDD pin with a 0.1 µF ceramic capacitor placed as close to the pin as possible. The STTS751 operates from 1.8V to 3.6V, so ensure the supply is stable and within this range. If the supply is noisy, add a 1 µF capacitor in parallel to filter high-frequency noise.
The I2C address is set by the ADD0 pin. Connect ADD0 to GND for address 0x48 or to VDD for address 0x49. Ensure the ALERT pin is pulled up with a resistor (e.g., 10 kΩ) since it is open-drain. Do not leave the ALERT pin floating, as it may cause false triggers. Also, note that the STTS751 has a one-shot mode; use it to reduce power consumption in battery-powered applications.
合规信息
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified. Halogen-free status not specified in available data.
