The ISL21400 features a precision voltage reference combined with a temperature sensor whose output voltage varies linearly with temperature. The precision 1.20V reference has a very low temperature coefficient (tempco), and its output voltage is scaled by an internal DAC (VREF) to produce a temperature stable output voltage that is programmable from 0V to 1.20V. The output voltage from the temperature sensor (VTS) is summed with VREF to produce a temperature dependent output voltage. The slope of the VTS portion of the output voltage can be programmed to be positive or negative in the range -2.1mV/C to +2.1mV/C. A programmable gain amplifier (PGA) sums the VTS and the VREF voltages and provides gains of 1x, 2x, and 4x to scale the output up to 4.8V and the slope to 8.4mV/C.