MAX6190BESA+T

Overview

The MAX6190BESA+T is a precision, micropower, low-dropout series-mode voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 1.25V with an initial accuracy of ±2mV 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 features a dropout voltage of 100mV at a 500µA load current and guarantees load regulation of 0.12µV/µA and line regulation of 8µV/V. The component is housed in an 8-pin SO package and supports capacitive loads up to 2.2nF.

Feature Summary

• Utilizes proprietary curvature-correction circuitry and laser-trimmed thin-film resistors for high precision
• Offers extremely low quiescent supply current suitable for battery-powered instruments
• Internally compensated for fast settling times and stability with capacitive loads

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 'ESAT' against official documentation to confirm tape-and-reel packaging status. Ensure the ordering code matches the exact lead-free/RoHS compliance requirements specified in the manufacturer's latest datasheet revision. Confirm that the input voltage source can provide sufficient transient current during turn-on to guarantee reliable operation.

Selection Notes

Select this part when a stable 1.25V reference is required with minimal power consumption. The low dropout characteristic allows operation from supply voltages close to the output level. Verify that the application does not require higher output currents than the guaranteed 500µA sourcing/sinking capability. Consider the thermal hysteresis specifications if the device undergoes significant temperature cycling.

Part Context

This component belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references. All members share identical pinouts, package styles, and core architectural features, differing primarily in their fixed output voltage levels and specific accuracy grades. The family is designed for applications requiring high stability and low power dissipation in compact surface-mount packages.

Replacement Considerations

Direct functional substitutes within the same family include MAX6190AESA+T and MAX6190CESA+T, which offer different initial accuracy grades (±4mV and ±6mV respectively) but maintain the same 1.25V output and electrical characteristics.