Overview
The TMP01FJ, produced by Analog Devices Inc., is a low power, programmable temperature controller and sensor. This device generates a voltage output proportional to absolute temperature and provides control signals from one of two outputs when the temperature exceeds or falls below a specific range. The temperature trip points and hysteresis band are user-programmable using external resistors, which can also be integrated on-board for high-volume production. The TMP01FJ combines a band gap voltage reference with a pair of matched comparators, ensuring precise temperature measurement and control.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | 4.5 V | 13.2 V | V | ||
| Operating Temperature Range | -55°C | +150°C | °C | ||
| Storage Temperature Range | -65°C | +150°C | °C | ||
| Quiescent Current | V+ = 5 V | 500 μA | μA | ||
| Output Current (Open-Collector Outputs) | 50 mA | mA | |||
| Temperature Accuracy | ±1°C | °C | |||
| Temperature Coefficient (VPTAT) | 5 mV/K | mV/K | |||
| VPTAT at 25°C | 1.49 V | V | |||
| Output Voltage (VREF) | 2.5 V | V | |||
| Package Types | PDIP, SOIC, TO-99 |
Key Features
- User-programmable temperature trip points and hysteresis using external resistors.
- Band gap voltage reference providing a constant 2.5 V output and a voltage proportional to absolute temperature (VPTAT).
- Precise temperature coefficient of 5 mV/K for VPTAT.
- Temperature accuracy of ±1°C (typical) over the rated temperature range with excellent linearity.
- Open-collector outputs capable of sinking 20 mA, enabling direct drive of control relays.
- Low quiescent current of 500 μA (max) from a 5 V supply.
- Available in 8-pin mini PDIP, SOIC, and TO-99 packages.
- Proprietary thin-film resistors and production laser trimming for high accuracy.
Applications
- Over/under temperature sensors and alarms.
- Board-level temperature sensing.
- Temperature controllers and electronic thermostats.
- Thermal protection systems.
- HVAC systems.
- Industrial process control.
- Remote sensors.
Q & A
- What is the primary function of the TMP01FJ?
The TMP01FJ is a low power, programmable temperature controller and sensor that generates a voltage output proportional to absolute temperature and provides control signals based on user-set temperature thresholds.
- How are the temperature trip points and hysteresis programmed?
The temperature trip points and hysteresis are programmed using user-selected external resistors, which can also be integrated on-board for high-volume production.
- What is the temperature accuracy of the TMP01FJ?
The TMP01FJ has a temperature accuracy of ±1°C (typical) over the rated temperature range, with excellent linearity.
- What are the available package types for the TMP01FJ?
The TMP01FJ is available in 8-pin mini PDIP, SOIC, and TO-99 packages.
- What is the quiescent current of the TMP01FJ when operating from a 5 V supply?
The quiescent current is only 500 μA (max) when operating from a 5 V supply.
- Can the TMP01FJ drive control relays directly?
Yes, the open-collector outputs are capable of sinking 20 mA, enabling the TMP01FJ to drive control relays directly.
- What is the operating temperature range of the TMP01FJ?
The operating temperature range is -55°C to +150°C.
- How is hysteresis determined in the TMP01FJ?
Hysteresis is determined by the total current drawn out of the 2.5 V reference, which is mirrored and used to generate a hysteresis offset voltage after a comparator has been tripped.
- What are some common applications of the TMP01FJ?
Common applications include over/under temperature sensors and alarms, board-level temperature sensing, temperature controllers, thermal protection systems, HVAC systems, industrial process control, and remote sensors.
- What is the significance of the band gap voltage reference in the TMP01FJ?
The band gap voltage reference provides both a constant 2.5 V output and a voltage proportional to absolute temperature (VPTAT), which has a precise temperature coefficient of 5 mV/K.
