Overview
The TMP9A00-EP, produced by Texas Instruments, is a precision analog output temperature sensor designed for high accuracy and low power consumption. This CMOS device is available in a compact 5-pin SC70 package, making it ideal for applications where space is limited. It operates over a wide temperature range of –55 °C to 150 °C with a supply voltage of 1.8 V to 5.5 V. The device is particularly suited for defense, aerospace, and medical applications due to its controlled baseline, single assembly/test site, single fabrication site, extended product life cycle, and enhanced product traceability.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 1.8 | 3.3 | 5.5 | V |
| Operating Ambient Temperature (TA) | –55 | 150 | °C | |
| Temperature Accuracy (–55 °C to 130 °C) | –2.5 | 2.5 | °C | |
| Temperature Accuracy (130 °C to 150 °C) | –3.5 | 3.5 | °C | |
| Supply Current | 4 | µA | ||
| Temperature Sensitivity | –11.77 | mV/°C | ||
| Output Voltage at 0 °C | 1.8639 | V | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | 229.0 | °C/W |
Key Features
- High accuracy: ±2.5 °C from –55 °C to 130 °C and ±3.5 °C from 130 °C to 150 °C.
- Low power consumption: Maximum supply current of 4 µA.
- Compact package: 5-pin SC70 package, reducing overall board space.
- Wide supply voltage range: 1.8 V to 5.5 V.
- Low self-heating: Less than 0.01 °C.
- Shutdown mode: Consumes less than 20 nA when V+ is less than 0.5 V.
- Support for defense, aerospace, and medical applications with controlled baseline, single assembly/test site, single fabrication site, extended product life cycle, and enhanced product traceability.
Applications
- Defense radio and radar systems.
- Avionics.
- Sensors and imaging systems.
- Medical devices requiring precise temperature monitoring.
Q & A
- What is the operating temperature range of the TMP9A00-EP?
The TMP9A00-EP operates over a temperature range of –55 °C to 150 °C.
- What is the supply voltage range for the TMP9A00-EP?
The supply voltage range is from 1.8 V to 5.5 V.
- How accurate is the TMP9A00-EP in terms of temperature measurement?
The device has an accuracy of ±2.5 °C from –55 °C to 130 °C and ±3.5 °C from 130 °C to 150 °C.
- What is the maximum supply current of the TMP9A00-EP?
The maximum supply current is 4 µA.
- What package type is the TMP9A00-EP available in?
The device is available in a 5-pin SC70 package.
- How does the TMP9A00-EP handle low supply voltages?
When the supply voltage (V+) is less than 0.5 V, the device enters shutdown mode, consuming less than 20 nA.
- What are the thermal resistance characteristics of the TMP9A00-EP?
The junction-to-ambient thermal resistance (RθJA) is 229.0 °C/W.
- How should the output of the TMP9A00-EP be filtered in noisy environments?
A capacitor with a series resistor can be used to filter the output, as shown in Figure 8-1 of the datasheet.
- What precautions should be taken when connecting pin 2 of the TMP9A00-EP?
Pin 2 should be connected to ground (GND) for optimal thermal and electrical connections. If not possible, it should be left floating to avoid noise and EMI/RFI interference.
- What are the recommended layout guidelines for the TMP9A00-EP?
Ensure proper electrical and thermal connections to pin 2, and use a 100-nF capacitor for power supply bypassing close to the supply pin.
