Analog Devices Inc./Maxim Integrated MAX6341ESA+T

Overview

MAX6341ESA+T from Maxim Integrated is a precision 4.096V voltage reference IC using buried-zener technology, delivering ±0.02% initial accuracy, 0.75ppm/°C typical temperature coefficient (1.5ppm/°C max), and 1.5µV_p-p (0.1Hz–10Hz) output noise. It sources/sinks ±15mA, operates from 8V to 36V input, and targets high-resolution ADC/DAC biasing in test equipment and industrial control systems.

For engineers reviewing the MAX6341ESA+T datasheet, MAX6341ESA+T pinout, MAX6341ESA+T application, or MAX6341ESA+T equivalent, key selection criteria include its 4.096V output matching common 12-bit/16-bit DAC full-scale ranges, low long-term drift (30ppm/1000hr), optional external trim (±24mV), and stability with capacitive loads up to 100µF without compensation.

Technical Context

The MAX6341ESA+T employs a buried-zener core with proprietary low-power temperature compensation, achieving near-zero curvature over –40°C to +85°C. Its output voltage is factory-set to 4.096V with no internal trimming required, and the TRIM pin supports ±1% adjustment via external potentiometer without degrading tempco performance.

Wideband noise reduction is implemented through the NR pin, accepting a 1µF capacitor to suppress 10Hz–100kHz noise by >40dB; output impedance remains below 1Ω up to 100kHz, enabling direct drive of SAR ADC reference inputs without buffer amplifiers.

Key Specifications

Pinout & Package

MAX6341ESA+T is housed in an 8-pin SO (Small Outline) package compliant with JEDEC MS-012, with 1.27mm pitch and exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5040IDR and ADR444BRZ, MAX6341ESA+T uniquely combines factory-trimmed 4.096V output, external trim capability, dedicated noise-reduction pin, and ±15mA drive-all in an industry-standard SO-8 footprint-making it optimal for high-accuracy, field-deployable instrumentation where calibration flexibility and noise immunity are critical.

Availability

MAX6341ESA+T is available at Aetrix Electronics and suitable for high-resolution analog-to-digital conversion, precision current source design, and automated test equipment requiring stable component supply across extended temperature ranges.

Supply support for MAX6341ESA+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 precision analog and mixed-signal ICs for industrial, medical, and test & measurement applications.

The MAX63xx family was engineered specifically for metrology-grade voltage referencing-prioritizing ultra-low noise, sub-ppm/°C stability, and robustness in unregulated supply environments.

FAQ

What is the guaranteed temperature coefficient specification for MAX6341ESA+T?

The MAX6341ESA+T has a maximum temperature coefficient of 1.5ppm/°C over the –40°C to +85°C operating range, with typical performance at 0.75ppm/°C. This value is measured using the box method per the datasheet (Note 1), ensuring predictable drift behavior in precision measurement systems where thermal gradients are present. The MAX6341ESA+T maintains this spec across its full rated temperature range without requiring external calibration.

Can MAX6341ESA+T drive a 10µF capacitor directly at its output?

Yes, MAX6341ESA+T is explicitly characterized and guaranteed stable with capacitive loads from 0µF to 100µF across all load currents (±15mA), per the "Bypassing" section of the datasheet. No series isolation resistor or external compensation network is required-enabling direct connection to large bulk capacitors used for ADC reference decoupling or low-frequency noise filtering without risk of oscillation.

Does MAX6341ESA+T support external voltage trimming, and what is the adjustment range?

Yes, MAX6341ESA+T supports external trimming via the TRIM pin, allowing ±24mV (±0.6%) output adjustment using a 10kΩ potentiometer connected between OUT and GND, with the wiper to TRIM. This adjustment preserves the device's 1.5ppm/°C max tempco and ±0.02% initial accuracy, as confirmed in the "Detailed Description" and Electrical Characteristics tables. The MAX6341ESA+T does not require trimming for standard 4.096V operation.

What is the purpose of the NR pin on MAX6341ESA+T, and how should it be used?

The NR (Noise Reduction) pin on MAX6341ESA+T provides a dedicated node for connecting a 1µF capacitor to GND to suppress wideband output noise (10Hz–100kHz) by >40dB, as shown in Figure 2 of the datasheet. Larger capacitances yield diminishing returns. Leaving NR open disables this feature. This function is unique to the MAX63xx family and is not available on alternatives like REF5040IDR or ADR444BRZ-making MAX6341ESA+T especially suited for low-noise data acquisition.

What input voltage range is supported by MAX6341ESA+T, and what happens outside that range?

MAX6341ESA+T operates from 8V to 36V on the IN pin. Absolute maximum rating is 40V, but operation above 36V risks permanent damage. Below 8V, the device fails to regulate-output drops below 4.096V and becomes supply-dependent. The datasheet specifies line regulation (10ppm/V) only within 8V–36V, and transient response metrics assume operation within this valid input window. For battery-powered systems, ensure VIN stays ≥8V using appropriate pre-regulation.