Analog Devices Inc./Maxim Integrated MAX6143AASA50+T

Overview

MAX6143AASA50+T from Maxim Integrated is a high-precision, low-noise voltage reference IC with integrated temperature-sensing output (TEMP), 5.0V nominal output, ±0.06% initial accuracy, 3ppm/°C max temperature coefficient, and active-low shutdown. It operates from +7V to +40V input, sources up to 30mA, and targets high-resolution ADC/DAC systems requiring stable, low-drift references.

For engineers reviewing the MAX6143AASA50+T datasheet, MAX6143AASA50+T pinout, MAX6143AASA50+T application, or MAX6143AASA50+T equivalent, key selection criteria include its 5.0V output stability over -40°C to +125°C, TRIM-adjustable output, TEMP output linearity (2.1mV/°C), and capacitor-free stability up to 100µF load.

Technical Context

The MAX6143AASA50+T uses bandgap-based architecture with proprietary curvature-correction circuitry and laser-trimmed thin-film resistors to achieve 3ppm/°C temperature coefficient and ±0.06% initial accuracy across -40°C to +125°C. Its TEMP output provides a linear 2.1mV/°C transducer voltage referenced to die temperature.

It features an active-low SHDN input that reduces supply current to 0.01µA, a TRIM terminal enabling ±6% output adjustment via external resistor divider, and inherent stability without output bypass capacitors-enabling robust operation with capacitive loads up to 100µF.

Key Specifications

Pinout & Package

MAX6143AASA50+T is housed in an 8-pin SOIC (SO) package, 3.9mm × 4.9mm body, 1.27mm pitch, RoHS-compliant. Pins 1 and 8 are internally connected and must remain unconnected externally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5050AIDR and ADR4550BRZ, the MAX6143AASA50+T uniquely integrates trimmability and die-temperature sensing-enabling adaptive calibration and thermal compensation in a single SO-8 device, without sacrificing core precision specs.

Availability

MAX6143AASA50+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, automotive sensor conditioning, and industrial PLC analog I/O requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6143AASA50+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 industrial, automotive, and communications applications.

The MAX6143 series was developed specifically for precision data converter reference and multi-function sensing applications-combining voltage reference accuracy, temperature transduction, and power efficiency in a single monolithic BiCMOS device.

FAQ

What is the output voltage tolerance and temperature coefficient of the MAX6143AASA50+T?

The MAX6143AASA50+T has a nominal output voltage of 5.000V with ±0.06% initial accuracy (4.997V to 5.003V at +25°C, no load) and a maximum temperature coefficient of 3ppm/°C over the full −40°C to +125°C operating range. This performance is achieved using laser-trimmed thin-film resistors and proprietary curvature-correction circuitry, ensuring minimal drift in automotive and industrial environments where the MAX6143AASA50+T is deployed.

Does the MAX6143AASA50+T require an output bypass capacitor for stability?

No, the MAX6143AASA50+T does not require an output bypass capacitor for stability. It is inherently stable with capacitive loads ranging from 0 to 100µF, eliminating the need for external output capacitance in most applications. This simplifies layout, reduces BOM cost, and improves reliability-especially valuable in space-constrained or high-reliability systems where the MAX6143AASA50+T serves as the primary reference.

How does the TEMP output function on the MAX6143AASA50+T?

The TEMP pin on the MAX6143AASA50+T provides a voltage proportional to die temperature: 630mV at +25°C with a linear coefficient of 2.1mV/°C. It is intended for high-impedance monitoring only-loading degrades accuracy. The output enables real-time thermal awareness for system-level compensation or safety monitoring, making the MAX6143AASA50+T especially useful in automotive and industrial applications where thermal derating is critical.

Can the output voltage of the MAX6143AASA50+T be adjusted, and how?

Yes, the MAX6143AASA50+T output voltage can be trimmed ±6% using the TRIM pin. Connect a resistive divider between OUT, TRIM, and GND (e.g., a 50kΩ potentiometer with wiper to TRIM). The output change follows ∆V_OUT = 2 × (V_TRIM − V_OUT/2) × k, where k ≈ ±6%. Leaving TRIM open retains the factory-set 5.000V output. This adjustability allows fine calibration in the MAX6143AASA50+T's target applications like precision instrumentation and sensor signal chains.

What is the shutdown behavior and current consumption of the MAX6143AASA50+T?

The MAX6143AASA50+T features an active-low SHDN pin (Pin 7). Driving SHDN <0.8V places the device in shutdown mode, reducing quiescent supply current to 0.01µA typical (≤5µA max over temperature). In normal operation (SHDN >2.0V), supply current ranges from 320µA to 700µA depending on temperature. This ultra-low shutdown current extends battery life significantly-making the MAX6143AASA50+T ideal for portable and always-on industrial sensors.