Analog Devices Inc./Maxim Integrated MAX6350ESA+T

Overview

MAX6350ESA+T from Maxim Integrated is a precision 5.000V voltage reference IC using buried-zener technology, delivering ±0.02% initial accuracy, 0.75ppm/°C typical temperature coefficient (1.5ppm/°C max), and 3.0µV_p-p (0.1Hz–10Hz) output noise. It operates from 8V to 36V input, supplies ±15mA, and serves as a stable reference in 16-bit data-conversion systems.

For engineers reviewing the MAX6350ESA+T datasheet, MAX6350ESA+T pinout, MAX6350ESA+T application, or MAX6350ESA+T equivalent, key selection criteria include low-drift performance over -40°C to +85°C, optional external trimming (±30mV range), noise-reduction capacitor support, and compatibility with capacitive loads up to 100µF without instability.

Technical Context

The MAX6350ESA+T employs a buried-zener core with proprietary temperature-compensation circuitry to achieve near-zero curvature across its operating range, enabling laboratory-grade stability without heater power. Its internal architecture supports simultaneous sourcing and sinking up to ±15mA while maintaining <10ppm/mA load regulation.

It features dedicated NR and TRIM pins for wideband noise reduction (via 1µF capacitor) and precision output adjustment (±1% via external potentiometer), both implemented without degrading long-term stability (30ppm/1000hr) or temperature hysteresis (20ppm).

Key Specifications

Pinout & Package

MAX6350ESA+T is housed in an 8-pin SO (Small Outline) package compliant with JEDEC MS-012, with 1.27mm pitch and gull-wing leads. Thermal pad is not present; power dissipation derates at 5.88mW/°C above +70°C (max 471mW at +70°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5050IDR and ADR4550BRZ, the MAX6350ESA+T uniquely combines ±15mA drive, 3.0µV_p-p noise, and 1.5ppm/°C max tempco in a single 8-pin SO package-making it optimal for high-fidelity data acquisition where reference loading and spectral purity are co-constrained.

Availability

MAX6350ESA+T is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, precision current sources, and digital voltmeters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6350ESA+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 precision, power, and interface applications, with emphasis on reliability and signal integrity.

The MAX63xx family was engineered specifically for metrology-grade voltage referencing in 16-bit+ data converters, industrial instrumentation, and automated test equipment-prioritizing ultra-low drift, low noise, and robust load handling over cost or feature count.

FAQ

What is the maximum input voltage rating for the MAX6350ESA+T?

The MAX6350ESA+T has an absolute maximum input voltage rating of 40V referenced to GND. However, its specified operational input range is 8V to 36V. Operating above 36V risks violating line regulation specifications and may accelerate long-term drift; sustained operation at 40V is not recommended. The MAX6350ESA+T must always be used with appropriate input filtering and transient protection when deployed in industrial environments with noisy supplies.

Does the MAX6350ESA+T require an external capacitor on the NR pin?

No, the NR pin on the MAX6350ESA+T is optional: leaving it open provides standard 3.0µV_p-p noise performance. Adding a 1µF capacitor reduces low-frequency noise by >50%, but larger values yield diminishing returns. The MAX6350ESA+T remains fully functional and stable without any NR capacitor-making it suitable for space-constrained layouts where board area is critical. This flexibility allows designers to optimize noise vs. footprint trade-offs per application.

Can the MAX6350ESA+T drive a 100µF output capacitor without instability?

Yes, the MAX6350ESA+T is explicitly characterized and guaranteed stable with output capacitance ranging from 0µF to 100µF across its full load range (±15mA) and temperature range (-40°C to +85°C). This eliminates the need for series resistance or isolation components often required with other references. The MAX6350ESA+T achieves this via internal compensation optimized for capacitive loading-enabling robust remote-sensing implementations and effective suppression of load-induced transients in high-precision systems.

What is the trim-adjustment range of the MAX6350ESA+T, and how is it implemented?

Using a 10kΩ potentiometer between OUT and GND with its wiper connected to the TRIM pin, the MAX6350ESA+T supports ±30mV (±0.6%) output adjustment-equivalent to ±1% of nominal 5.000V. This external trimming does not degrade temperature coefficient or long-term stability. The MAX6350ESA+T's TRIM circuitry is designed so that adjustment occurs without altering the buried-zener core's thermal characteristics, preserving its fundamental low-drift behavior throughout the trimmed range.

How does the MAX6350ESA+T perform under load transients?

The MAX6350ESA+T exhibits 500µV peak deviation and settles to ±0.01% of final value within 2µs when subjected to ±10mA sourcing/sinking load steps, as verified in load-transient response testing. Its low output impedance (<1Ω at DC, <10Ω up to 100kHz) and high slew rate enable this performance. This behavior makes the MAX6350ESA+T especially suitable for driving switched-capacitor ADC inputs or multiplexed sensor front-ends where rapid load changes occur-ensuring reference integrity is maintained across successive conversions.