MAX6190CESA+

Overview

The MAX6190CESA+ is a precision, micropower, low-dropout series-mode voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a nominal output voltage of 1.25V with an initial accuracy of ±6mV and a maximum temperature coefficient of 4ppm/°C. The device operates within a supply voltage range of 2.5V to 12.6V while drawing a maximum quiescent supply current of 35µA. It supports source and sink currents up to 500µA with a dropout voltage of approximately 100mV at full load. The component is housed in an 8-pin SO package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Utilizes proprietary curvature-correction circuitry and laser-trimmed thin-film resistors for high precision
• Features internally compensated design ensuring stability with capacitive loads up to 2.2nF
• Offers virtually input-voltage-immune supply current for optimized battery-powered efficiency

Applications

• Hand-Held Instruments
• Analog-to-Digital and Digital-to-Analog Converters
• Industrial Process Control
• Precision 3V/5V Systems
• Hard-Disk Drives

Procurement Notes

Verify the specific suffix 'CESA+' corresponds to the required accuracy grade (+/- 6mV) and lead-free RoHS compliance status. Confirm the 8-pin SO package outline matches the target PCB footprint. Ensure the input voltage source can provide transient turn-on currents exceeding the nominal 35µA specification to guarantee reliable startup under minimum dropout conditions.

Selection Notes

Select this part when a fixed 1.25V reference is required with tight initial accuracy and low temperature drift. It is suitable for applications where board space is limited due to optional external capacitance requirements. Consider the 35µA quiescent current limit for battery life calculations and verify that the 500µA load capability meets the downstream circuit demands.

Part Context

This component belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references. These devices share common architectural features including series-mode bandgap topology and micropower operation. The MAX6190 variant specifically targets the 1.25V output segment, distinguishing itself from other family members like the MAX6191 (2.048V) or MAX6198 (4.096V) through its unique internal resistor trimming.

Replacement Considerations

Other variants within the MAX6190 family, such as MAX6190AESAV+ or MAX6190BESA+, offer different accuracy grades but maintain identical pinouts and electrical characteristics.