Overview
The TMP235-Q1, produced by Texas Instruments, is an automotive-grade, high-accuracy analog output temperature sensor. This device is part of the TMP23x-Q1 family, designed for various automotive applications ranging from powertrain to infotainment. The TMP235-Q1 offers a precise temperature measurement with an output voltage proportional to the temperature, making it a reliable choice for demanding automotive environments.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Operating Temperature Range | -40°C | - | 150°C | °C |
| Supply Voltage Range | 2.3 V | - | 5.5 V | V |
| Operating Current | - | 9 µA | 17 µA | µA |
| Temperature Accuracy | - | ±2.5°C | - | °C |
| Sensor Gain | - | 10 mV/°C | - | mV/°C |
| Offset Voltage at 0°C | - | 500 mV | - | mV |
| Output Current | - | - | 500 µA | µA |
| Output Impedance | - | 20 Ω (at 100 Hz) | 50 Ω (at 500 Hz) | Ω |
| Typical Load Capacitance | - | - | 1000 pF | pF |
| Turn-On Time | - | 800 µs | - | µs |
Key Features
- AEC-Q100 Qualified: Suitable for automotive applications with a temperature range of -40°C to +150°C.
- Functional Safety-Capable: Documentation available to aid in functional safety system design.
- Tight Accuracy: ±2.5°C maximum accuracy across the full temperature range.
- Positive Slope Sensor Gain and Offset: 10 mV/°C gain and 500 mV offset at 0°C.
- Wide Operating Supply Voltage Range: 2.3 V to 5.5 V.
- Short-Circuit Protected Output: Ensures reliability in harsh environments.
- Low Power Consumption: Typical quiescent current of 9 µA.
- Strong Output Driver: Capable of driving loads up to 1000 pF.
- Cost-Effective Alternative to Thermistors: Offers better accuracy and linearity.
- Footprint Compatibility: Compatible with industry-standard LMT8x-Q1, LM50-Q1, and LM20 temperature sensors.
Applications
- Automotive Head Unit: For temperature monitoring in infotainment systems.
- Electric Power Steering (EPS): To monitor temperatures in EPS systems.
- Shifter System: For temperature sensing in transmission systems.
- Battery Management System (BMS): To monitor battery temperatures.
- Gasoline Engine: For engine temperature monitoring.
Q & A
- What is the operating temperature range of the TMP235-Q1?
The operating temperature range of the TMP235-Q1 is -40°C to +150°C.
- What is the supply voltage range for the TMP235-Q1?
The supply voltage range for the TMP235-Q1 is 2.3 V to 5.5 V.
- What is the typical operating current of the TMP235-Q1?
The typical operating current of the TMP235-Q1 is 9 µA.
- What is the temperature accuracy of the TMP235-Q1?
The temperature accuracy of the TMP235-Q1 is ±2.5°C across the full temperature range.
- What is the sensor gain and offset of the TMP235-Q1?
The sensor gain is 10 mV/°C, and the offset voltage at 0°C is 500 mV.
- Is the TMP235-Q1 short-circuit protected?
Yes, the TMP235-Q1 has a short-circuit protected output.
- What is the maximum output current of the TMP235-Q1?
The maximum output current of the TMP235-Q1 is 500 µA.
- What is the typical load capacitance the TMP235-Q1 can drive?
The TMP235-Q1 can drive loads up to 1000 pF.
- What is the turn-on time of the TMP235-Q1?
The turn-on time of the TMP235-Q1 is 800 µs.
- Is the TMP235-Q1 AEC-Q100 qualified?
Yes, the TMP235-Q1 is AEC-Q100 qualified for automotive applications.
