Overview
The TMP127-Q1, produced by Texas Instruments, is a high-accuracy digital temperature sensor designed for various thermal management and protection applications. This device supports an ambient temperature range of -55 °C to 175 °C and features a 14-bit signed temperature resolution, providing 0.03125 °C per least significant bit (LSB). It operates over a supply range of 1.62 V to 5.5 V and is known for its excellent power supply rejection ratio (PSR), maintaining accuracy across the entire supply range. The TMP127-Q1 is equipped with a fast conversion rate, low supply current, and a simple SPI-compatible interface, making it ideal for a wide range of applications.
Key Specifications
| Parameter | Min | |||
|---|---|---|---|---|
| Supply Voltage (VDD) | 1.62 | 3.3 | 5.5 | V |
| Operating Ambient Temperature (TA) | -55 | 175 | °C | |
| Temperature Accuracy (-55 °C to 150 °C) | -0.8 | 0.8 | °C | |
| Temperature Accuracy (150 °C to 175 °C) | -1 | 1 | °C | |
| Temperature Resolution | 14 Bits (0.03125 °C per LSB) | |||
| Conversion Period | 200 | 270 | ms | |
| Active Conversion Time | 4.5 | 7.5 | ms | |
| Input Logic High Level (SCLK, SIO, CS) | 0.7 * VDD | V | ||
| Input Logic Low Level (SCLK, SIO, CS) | 0.3 * VDD | V |
Key Features
- High Accuracy: The TMP127-Q1 offers high accuracy temperature sensing with a resolution of 0.03125 °C per LSB.
- Wide Operating Range: It operates over a broad temperature range of -55 °C to 175 °C.
- Low Power Consumption: The device features low power consumption with a power-optimized conversion period and a shutdown mode for further power savings.
- SPI Interface: It has a simple SPI-compatible interface with both 3-wire and optional 4-wire configurations.
- Small Package: Available in a small SOT-23 package, ideal for close placement to heat sources and quick response times.
- PSR and Stability: Excellent power supply rejection ratio (PSR) and long-term stability and drift characteristics.
Applications
- Automotive Systems: Suitable for vehicle control units (VCU), powertrain exhaust sensors, and electric power steering (EPS).
- Industrial Automation: Used in building and factory automation, field transmitters, and ultrasonic level sensing.
- Aerospace and Defense: Applicable in avionics and other safety-critical systems.
- Thermal Management: Ideal for thermal protection and management in various industrial and automotive applications.
Q & A
- What is the operating temperature range of the TMP127-Q1?
The TMP127-Q1 operates over a temperature range of -55 °C to 175 °C.
- What is the resolution of the TMP127-Q1 temperature sensor?
The TMP127-Q1 has a 14-bit signed temperature resolution, providing 0.03125 °C per LSB.
- What is the supply voltage range for the TMP127-Q1?
The device operates over a supply voltage range of 1.62 V to 5.5 V.
- What interface does the TMP127-Q1 use for communication?
The TMP127-Q1 uses a simple SPI-compatible interface with both 3-wire and optional 4-wire configurations.
- What are the key features of the TMP127-Q1's power consumption?
The device features low power consumption with a power-optimized conversion period and a shutdown mode for further power savings.
- What is the package type and size of the TMP127-Q1?
The TMP127-Q1 is available in a small SOT-23 package, measuring 2.90 mm x 1.60 mm.
- What are some of the applications of the TMP127-Q1?
The TMP127-Q1 is used in automotive systems, industrial automation, aerospace and defense, and thermal management applications.
- How does the TMP127-Q1 handle temperature accuracy across different temperature ranges?
The device maintains high accuracy with ±0.8 °C from -55 °C to 150 °C and ±1 °C from 150 °C to 175 °C.
- What is the conversion period of the TMP127-Q1?
The conversion period is between 200 ms and 270 ms.
- Does the TMP127-Q1 support any specific communication modes?
Yes, it supports SPI communication modes 0 and 3.
