The ISL21400 is a programmable temperature slope voltage reference that features a precision voltage reference and a temperature sensor. The output voltage varies linearly with temperature and can be programmed with adjustable slope and gain via an I2C bus.
The ISL21400 combines a 1.20 V precision reference with a temperature sensor whose output voltage varies linearly with temperature. The reference voltage and temperature slope are programmable via an I²C serial interface and stored in non‑volatile registers, eliminating the need for software initialization at power‑up.
The device is offered in an 8‑lead MSOP package, operates from 2.7 V to 5.5 V supply, and is rated for –40 °C to +85 °C ambient temperature. It targets applications such as RF power‑amplifier bias compensation, LCD bias, laser‑diode bias, sensor linearization, and data‑acquisition systems.
| Reference voltage | 1.20 V |
|---|---|
| Temperature slope range | -2.1 mV/°C to +2.1 mV/°C |
| PGA gain options | 1×, 2×, 4× |
| Operating temperature range | -40 °C to +85 °C |
| Typical active supply current | 200 µA |
| Total accuracy | ±2 % over temperature and VCC range |
| Package type | 8‑lead MSOP (3.0 mm) |
It is supplied in an 8‑lead MSOP (3.0 mm) plastic package.
The device operates from –40 °C up to +85 °C.
Yes, the programming registers are stored in non‑volatile memory, so settings are retained on power‑down.