MAX6191BESA+T

Overview

The MAX6191BESA+T is a precision, micropower, low-dropout series-mode bandgap voltage reference manufactured by Analog Devices / Maxim Integrated. It provides a nominal output voltage of 2.048V with an initial accuracy of ±2mV and a maximum temperature coefficient of 5ppm/°C. The device draws a maximum quiescent supply current of 35µA and supports source and sink currents up to 500µA. It operates within an input voltage range of 2.5V to 12.6V and features internal compensation for stability with capacitive loads up to 2.2nF.

Feature Summary

• Proprietary curvature-correction circuit combined with laser-trimmed precision thin-film resistors ensures high initial accuracy and very low temperature coefficient.
• Series-mode architecture delivers supply current virtually immune to input voltage variations, maximizing efficiency in battery-powered applications.
• Internally compensated design guarantees fast settling times and stability with capacitive loads ranging from 0 to 2.2nF without requiring external components.

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 component matches the specific part number MAX6191BESA+T, ensuring the 'B' suffix corresponds to the required ±2mV initial accuracy grade. Confirm the package type is SO-8 and the operating temperature range covers -40°C to +85°C. Check RoHS compliance status indicated by the '+' suffix. Ensure the supplier provides valid traceability documentation for this Analog Devices / Maxim Integrated product.

Selection Notes

Select the MAX6191BESA+T when a precise 2.048V reference is required with minimal power consumption. This part is suitable for designs needing low dropout voltage and stable performance under varying load conditions. Consider the 35µA quiescent current limit for battery life calculations. Verify that the application does not require higher output voltages or different accuracy grades available in the MAX6190–MAX6195 family.

Part Context

The MAX6191BESA+T belongs to the MAX6190–MAX6195/MAX6198 family of precision voltage references. These devices share common architectural features such as micropower operation and low-dropout capabilities. The family offers various output voltages and accuracy grades, with the MAX6191 specifically providing the 2.048V output option. All members utilize BiCMOS process technology and are housed in 8-pin SO packages.

Replacement Considerations

Other parts in the MAX6190–MAX6195 family may serve as alternatives if different output voltages or accuracy grades are acceptable. Verify pin compatibility and electrical specifications before substitution. No direct public substitute part numbers are confirmed in the provided documentation.