AD680JT

Overview

The AD680JT is a band gap voltage reference providing a fixed 2.5 V output from input voltages between 4.5 V and 36 V. It operates with a maximum quiescent current of 250 μA and features laser-trimmed initial accuracy of ±10 mV (±0.4%). The temperature coefficient is specified at 30 ppm/°C within the 0°C to 70°C operating range. Noise performance includes 8 μV p-p from 0.1 Hz to 10 Hz and 250 nV/√Hz wideband density. The device supports up to 10 mA load current, offers 50 nF capacitive load stability, and utilizes a 3-pin TO-92 package.

Feature Summary

• Laser trimming ensures high precision with low initial accuracy error and minimal temperature drift without external components.
• Low quiescent current architecture enables efficient operation in power-sensitive applications while maintaining excellent DC characteristics.
• Low noise performance provides stable reference signals suitable for sensitive analog-to-digital and digital-to-analog converter interfaces.

Applications

• Precision reference for data converters such as ADCs and DACs
• Voltage regulator for portable battery-operated equipment
• Temperature transducer configurations

Procurement Notes

Verify the specific suffix 'JT' corresponds to the 3-pin TO-92 package variant when sourcing. Confirm that the required operating environment falls within the 0°C to 70°C specification range, as this grade differs from the extended temperature AN or AR options. Ensure ESD precautions are observed during handling due to device sensitivity.

Selection Notes

Select the AD680JT when a cost-effective, through-hole solution is required for standard industrial temperature ranges. This model is appropriate for designs where space constraints allow for TO-92 packaging but surface-mount SOIC or PDIP options are unavailable. It serves as a direct replacement for incomplete two-terminal references requiring higher accuracy.

Part Context

The AD680 series consists of low-power, low-cost band gap voltage references manufactured by Analog Devices. The family includes variants in 8-lead PDIP, 8-lead SOIC, and 3-pin TO-92 packages. The AD680JT specifically denotes the version optimized for commercial temperature ranges using the TO-92 form factor.

Replacement Considerations

Direct substitutes include other AD680 grades such as AD680JR or AD680JN if package compatibility can be adapted. Verify that alternative references maintain similar quiescent current levels and noise specifications to ensure circuit stability is not compromised.