The LTC2990 is a temperature, voltage and current monitor for 3V to 5.5V systems which integrates a 14-bit ADC, 10ppm/°C reference and I2C interface to provide submillivolt voltage resolution, as well as accuracy of ±1°C internally and ±0.5°C remotely when making temperature measurements. Unlike traditional temperature monitors that rely on single-ended inputs for measurements, the LTC2990 uses four differential inputs to measure multiple parameters simultaneously.
The LTC2990 is a system monitor designed for 3V to 5.5V applications that integrates a 14-bit analog-to-digital converter (ADC), a 10ppm/°C voltage reference, and an I²C interface. It provides submillivolt voltage resolution and high accuracy, measuring internal temperatures with +1°C accuracy and remote temperatures with +0.5°C accuracy.
Unlike traditional monitors using single-ended inputs, the LTC2990 utilizes four multifunction differential voltage pins to simultaneously measure external temperature, single-ended or differential voltage, and rail-to-rail current. It also measures its own internal supply voltage (VCC) and temperature.
| Supply Operating Voltage | 3V to 5.5V |
|---|---|
| ADC Resolution | 14-bit |
| Internal Temperature Accuracy | +1°C |
| Remote Temperature Accuracy | +0.5°C |
| Voltage Reference Stability | 10ppm/°C |
| Package Type | 10-Lead MSOP Package |
The device operates with a supply voltage ranging from 3V to 5.5V.
The internal temperature measurement has an accuracy of +1°C.