Overview
The TMP04FT9Z, produced by Analog Devices Inc., is a monolithic temperature detector that generates a modulated serial digital output proportional to the temperature of the device. This thermometer features an onboard sensor that produces a voltage precisely proportional to absolute temperature, which is then compared to an internal voltage reference and input to a precision digital modulator. The digital output is ratiometric, making it independent of clock drift errors common in other serial modulation techniques.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | -40°C | +85°C | ||
| Accuracy (–25°C to +100°C) | ±1.5°C | ±4.0°C | ||
| Accuracy (–40°C to –25°C) | ±2.0°C | ±5.0°C | ||
| Temperature Linearity | 0.5°C | |||
| Long-Term Stability (1000 Hours at 125°C) | 0.5°C | |||
| Power Supply Voltage | 4.5V | 7V | ||
| Supply Current | 0.9mA | |||
| Power Consumption (Max at 5V) | 6.5mW | |||
| Output High Voltage (IOH = 800µA) | V+ – 0.4V | |||
| Output Low Voltage (IOL = 800µA) | 0.4V | |||
| Package Style | 3-Lead TO-92 |
Key Features
- CMOS/TTL-Compatible Output: The digital output of the TMP04 is compatible with CMOS and TTL logic, making it easy to interface with most microprocessors.
- Precision Digital Modulator: The device uses a first-order sigma-delta modulator to digitize the temperature sensor output, providing high accuracy and linearity.
- Ratiometric Encoding: The serial digital output is independent of clock drift errors, ensuring reliable temperature measurement.
- Low Power Consumption: Maximum power consumption is 6.5mW at 5V, making it suitable for low-power applications.
- High Accuracy and Linearity: The device offers excellent accuracy and linearity over the entire rated temperature range without the need for user calibration.
Applications
- Isolated Sensors: Suitable for systems requiring isolated circuits using optocouplers or isolation transformers.
- Environmental Control Systems: Used in temperature monitoring and control in various environmental settings.
- Computer Thermal Monitoring: Ideal for monitoring temperatures in computer systems to ensure thermal stability.
- Thermal Protection: Provides temperature data for thermal protection mechanisms in various electronic systems.
- Industrial Process Control: Used in industrial processes where precise temperature monitoring is crucial).
- Power System Monitors: Monitors temperatures in power systems to ensure safe and efficient operation).
Q & A
- What is the operating temperature range of the TMP04FT9Z?
The operating temperature range is from –40°C to +85°C.
- What is the typical accuracy of the TMP04FT9Z over the –25°C to +100°C range?
The typical accuracy is ±1.5°C.
- What type of output does the TMP04FT9Z provide?
The device provides a modulated serial digital output that is CMOS/TTL-compatible.
- What is the power consumption of the TMP04FT9Z at 5V?
The maximum power consumption at 5V is 6.5mW).
- What is the package style of the TMP04FT9Z?
The package style is 3-Lead TO-92.
- Is the TMP04FT9Z suitable for isolated sensor applications?
Yes, it is suitable for systems requiring isolated circuits using optocouplers or isolation transformers).
- What is the supply current of the TMP04FT9Z?
The typical supply current is 0.9mA).
- Does the TMP04FT9Z require user calibration for temperature measurement?
No, it does not require user calibration, offering excellent accuracy and linearity over the entire rated temperature range).
- What is the power supply rejection ratio (PSRR) of the TMP04FT9Z?
The typical PSRR is 0.7°C/V).
- Is the TMP04FT9Z RoHS compliant?
Yes, the TMP04FT9Z is RoHS compliant).
