Our customer is searching the following Vref or precision LDO.
Input: +5V +/-5%, or -5V +/-5%Output: -4.096V +/-0.1%Output Current: 18mAmaxTemp.: 0 to 105C
I could not catch this Negative Vref on your web pages.
So do you have the way for this requirement include the small circuit?
We have only two references capable of negative output voltages at this time. These are the AD688 (+/- 10V) and the AD588 (+/- 10V, +/-5V). Neither are capable of a direct -4.096 V output.
A simple circuit for generating a negative reference is to connect the output of the reference to an inverting amplifier with a gain of 1. Precision resistors will be required to maintain the overall temperature coefficient of the circuit. See example below.
I would recommend the ADR45xx for the lowest drift performance and the ADR44x for the lowest noise performance.
adr440 adr4550 vref