Electronically Programmable Voltage Reference

The DS4305 is a nonvolatile (NV) electronically programmable voltage reference. The reference voltage is programmed in-circuit during factory calibration/programming. Programming the reference voltage, VOUT, is as simple as applying the desired voltage on VIN and toggling the adjust pin (active-low ADJ) to lock the VOUT voltage level indefinitely, even if the device is power cycled. The DS4305 replaces current cumbersome factory adjustment arrangements with a low-cost solution that can be adjusted using automated techniques. In addition, the DS4305 has the ability to be readjusted after the unit has been fully assembled and tested. This results in a much more flexible manufacturing arrangement, lower inventory costs, and a quicker time-to-market.

Applications

* Bias Adjusting * Factory-Calibrated Equipment * Offset Nulling * Power Amps * Power Supply Calibration * Pressure Bridges * Threshold Setting

* Precise Electronically Adjustable Voltage Reference

* Enables Automated Factory Trimming of Devices Needing Voltage Adjustment

* Can be Adjusted to Within ±1.5mV

* Wide Adjustable Output Voltage Range Within 300mV of the Supply Rails

* Low Temperature Coefficient

* ±1mA of Output-Current Drive

* NV Memory Stores the Voltage Indefinitely

* Output Short-Circuit Protection

* Low Cost

* Low Power Consumption

* 4.0V to 5.5V Single-Supply Operation

* Small 5-Lead SOT23 Package

* -40°C to +125°C Temperature Operation

* DS4305K Evaluation Kit is Available