Analog Devices Inc./Maxim Integrated MAX6143BASA25+T

Overview

MAX6143BASA25+T from Maxim Integrated is a high-precision, low-noise voltage reference with integrated temperature-sensing output (TEMP), 2.5V nominal output, ±0.10% initial accuracy, 10ppm/°C max temperature coefficient over –40°C to +125°C, and active-low shutdown (SHDN). It delivers stable reference voltage for high-resolution ADC/DAC systems in automotive and industrial instrumentation.

For engineers reviewing the MAX6143BASA25+T datasheet, MAX6143BASA25+T pinout, MAX6143BASA25+T application, or MAX6143BASA25+T equivalent, key selection criteria include its 2.5V output stability under load variation, TEMP output linearity (570mV at 25°C, 1.9mV/°C), TRIM input adjustability, and ability to operate without output bypass capacitors up to 100µF.

Technical Context

The MAX6143BASA25+T uses bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve low drift and high initial accuracy. Its TEMP output provides a linear voltage proportional to die temperature, enabling on-chip thermal monitoring without external sensors.

It features an active-low SHDN input that reduces supply current to 0.01µA, and a TRIM terminal supporting ±3% to ±6% output adjustment via external resistive divider. The device operates from (V_OUT + 2V) to +40V input, sources up to 30mA, sinks up to 2mA, and remains stable with capacitive loads up to 100µF.

Key Specifications

Pinout & Package

MAX6143BASA25+T is housed in an 8-pin SO (SOIC-N) package, 3.9mm × 4.9mm body, 1.27mm pitch, with pins 1 and 8 internally connected (do not route externally).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with MAX6143BASA25+T, MAX6126AASA25+ offers superior stability but sacrifices thermal sensing and adjustability, while ADR4525BRZ delivers higher accuracy at the cost of power efficiency and feature integration - making MAX6143BASA25+T optimal for space- and feature-constrained automotive and industrial designs.

Availability

MAX6143BASA25+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial data loggers, and portable test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6143BASA25+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX6143 series was developed specifically for high-accuracy voltage referencing in harsh-environment systems requiring both precision and on-die thermal awareness - targeting ADC/DAC reference, sensor signal chains, and programmable logic controller analog front-ends.

FAQ

What is the guaranteed initial accuracy of the MAX6143BASA25+T?

The MAX6143BASA25+T has a guaranteed initial accuracy of ±0.10% at +25°C with no load, corresponding to an output voltage range of 2.4975V to 2.5025V. This specification is tested and guaranteed across the full production lot, and applies specifically to the MAX6143BASA25+T variant - distinct from the tighter ±0.06% tolerance of the 'A' grade.

Does the MAX6143BASA25+T require an output bypass capacitor for stability?

No, the MAX6143BASA25+T does not require an output bypass capacitor for stability. It is internally compensated and remains stable with capacitive loads from 0 to 100µF. This eliminates board space, cost, and reliability concerns associated with external capacitors - a key advantage confirmed in the device's Electrical Characteristics table and Applications Information section.

How is the TEMP output of the MAX6143BASA25+T calibrated and used?

The TEMP output of the MAX6143BASA25+T provides 570mV at +25°C with a slope of 1.9mV/°C, enabling direct die temperature measurement. It is calibrated at wafer test and does not require external trimming. To use it, connect TEMP to an ADC input and apply the linear equation: T_J(°C) = (V_TEMP − 570mV) / 1.9mV/°C. Self-heating effects are minimal under typical load conditions.

Can the MAX6143BASA25+T drive a 10kΩ load while maintaining accuracy?

Yes, the MAX6143BASA25+T can drive a 10kΩ load (250µA at 2.5V) while maintaining full accuracy. Load regulation is specified at ±2ppm/mA (typical) for sourcing currents up to 10mA, meaning a 250µA load introduces ≤0.5ppm error - well within the 10ppm/°C tempco and ±0.10% initial accuracy specs. Full electrical validation is provided in the Load Regulation section of the datasheet.

What is the minimum input voltage required for the MAX6143BASA25+T to regulate at 2.5V?

The minimum input voltage for the MAX6143BASA25+T to regulate at 2.5V is (V_OUT + 2V) = 4.5V, as explicitly stated in the Absolute Maximum Ratings and Electrical Characteristics tables. Dropout behavior is characterized in Figure MAX6143toc09, showing <200mV dropout at 20mA load and +25°C - confirming reliable regulation starts at 4.5V input across the full temperature range.