Overview
The TMP75BIDR, produced by Texas Instruments, is a 1.8-V digital temperature sensor that features a 12-bit analog-to-digital converter (ADC) and a standard two-wire serial interface. This device is designed for thermal management and thermal protection applications, offering high accuracy and reliability. It operates over a wide temperature range of –55°C to +125°C and is available in SOIC-8 and VSSOP-8 packages. The TMP75BIDR is pin and register compatible with the industry-standard LM75 and TMP75, making it a versatile choice for various temperature sensing needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | –55 | +125 | °C | |
| Operating Supply Range | 1.4 | 3.6 | V | |
| Temperature Resolution | 0.0625 | °C | ||
| Temperature Accuracy (Error) | –1 | +3 | °C | |
| Quiescent Current (Active) | 45 | μA | ||
| Quiescent Current (Shutdown) | 0.3 | μA | ||
| High-Level Input Voltage (VIH) | 0.7(VS) | VS | V | |
| Low-Level Input Voltage (VIL) | -0.3 | 0.3(VS) | V |
Key Features
- Digital output with standard two-wire serial interface compatible with SMBus.
- Up to 8 pin-programmable bus addresses.
- Overtemperature ALERT pin with programmable trip values.
- Shutdown mode for battery power saving.
- One-shot conversion mode for custom update rates.
- Integrated spike-suppression filters and Schmitt triggers to minimize input spikes and bus noise.
- Supports fast (1 kHz to 400 kHz) and high-speed (1 kHz to 3 MHz) modes.
Applications
The TMP75BIDR is suitable for a variety of applications, including thermal management in electronic devices, thermal protection in industrial and automotive systems, and temperature monitoring in medical equipment. Its wide operating temperature range and high accuracy make it an ideal choice for environments where precise temperature sensing is critical.
Q & A
- What is the operating temperature range of the TMP75BIDR? The TMP75BIDR operates over a temperature range of –55°C to +125°C.
- What is the resolution of the temperature readings provided by the TMP75BIDR? The TMP75BIDR provides temperature readings with a resolution of 0.0625°C.
- What is the typical quiescent current of the TMP75BIDR in active mode? The typical quiescent current in active mode is 45 μA.
- Does the TMP75BIDR support multiple devices on the same bus? Yes, the TMP75BIDR supports up to eight devices on the same bus with pin-programmable addresses.
- What is the purpose of the ALERT pin on the TMP75BIDR? The ALERT pin is used for overtemperature alerts and can be configured to operate as an active low or active high signal.
- How does the TMP75BIDR handle bus noise and input spikes? The TMP75BIDR features integrated spike-suppression filters and Schmitt triggers to minimize the effects of input spikes and bus noise.
- What are the supported communication modes for the TMP75BIDR? The TMP75BIDR supports both fast (1 kHz to 400 kHz) and high-speed (1 kHz to 3 MHz) modes.
- Can the TMP75BIDR be used in battery-powered devices? Yes, the TMP75BIDR has a shutdown mode to save battery power.
- How is the temperature sensed by the TMP75BIDR? The temperature is sensed using a bipolar junction transistor (BJT) in a band-gap configuration, which produces a voltage proportional to the chip temperature.
- What is the significance of the SMBus alert function in the TMP75BIDR? The SMBus alert function allows the TMP75BIDR to signal an alert condition to the master device when the temperature exceeds or falls below set limits.
