The AD7814 is a complete temperature monitoring system in a SOT-23 package or 8-lead MSOP package. It contains a band gap temperature sensor and 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25°C. The AD7814 has a flexible serial interface that allows easy inter- facing to most microcontrollers.
The AD7814 integrates a band‑gap temperature sensor, a 10‑bit ADC and a serial interface in a compact SOT‑23 or 8‑lead MSOP package. It operates from 2.7 V to 5.5 V and provides temperature readings with 0.25 °C resolution over a –55 °C to +125 °C range.
The device uses an SPI‑compatible, QSPI™ or MICROWIRE™ protocol and includes a shutdown mode that reduces supply current to the sub‑µA level. Typical applications include hard‑disk drives, personal computers, office equipment, domestic appliances and process‑control systems.
| Operating Temperature Range | -55 °C to +125 °C |
|---|---|
| Temperature Accuracy | ±2 °C |
| Resolution | 10 bits (0.25 °C) |
| Supply Voltage | 2.7 V to 5.5 V |
| Supply Current (Normal Mode) | 250 µA to 400 µA |
| Shutdown Current (Vpp = 5 V) | 1.23 µA |
| Input High Voltage | 2.4 V |
| Input Low Voltage | 0.8 V |
| Output High Voltage | Vpp − 0.3 V |
| Output Low Voltage | 0.4 V |
It can measure temperatures from –55 °C up to +125 °C.
The sensor provides an accuracy of ±2 °C over the specified range.