Analog Devices Inc./Maxim Integrated MAX6341ESA

Overview

MAX6341ESA from Maxim Integrated is a precision 4.096V voltage reference IC using buried-zener technology, delivering ±0.02% initial accuracy, 1.5ppm/°C max temperature coefficient (–40°C to +85°C), and 1.5µV_p-p (0.1Hz–10Hz) output noise. It sources/sinks ±15mA and supports external trimming and noise reduction for high-resolution data acquisition systems.

For engineers reviewing the MAX6341ESA datasheet, MAX6341ESA pinout, MAX6341ESA application, or MAX6341ESA equivalent, this device is selected for 16-bit ADC/DAC reference design, precision current source calibration, and ATE equipment requiring stable, low-drift, low-noise excitation.

Technical Context

The MAX6341ESA employs buried-zener core architecture with on-chip temperature compensation, achieving near-zero curvature over –40°C to +85°C. Its output voltage is factory-set to 4.096V with optional external trim via the TRIM pin (±24mV range), and its NR pin accepts a 1µF capacitor to reduce wideband noise without affecting DC stability.

It operates from 8V to 36V input, maintains load regulation of ≤7ppm/mA, and exhibits excellent transient response (<8µs settling to ±0.01%), enabling use in dynamic reference paths where fast load switching occurs-e.g., multiplexed sensor front-ends or programmable gain amplifier biasing.

Key Specifications

Pinout & Package

MAX6341ESA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard footprint and thermal characteristics suitable for reflow assembly. Pin 1, 7, and 8 are internally connected and must remain unconnected in PCB layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF5040IDR and ADR444BRZ, the MAX6341ESA uniquely combines ±15mA drive capability, integrated NR pin for configurable noise filtering, and 1.5ppm/°C tempco in a single SO-8 package-making it optimal for high-dynamic-range, high-current reference applications without external buffering.

Availability

MAX6341ESA is available at Aetrix Electronics and suitable for high-resolution analog-to-digital converters, precision current sources, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6341ESA 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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.

The MAX63xx family was designed specifically for metrology-grade voltage reference applications demanding laboratory-level stability, low noise, and robust load driving-targeting 16-bit+ data conversion and calibration infrastructure.

FAQ

What is the maximum operating temperature range for the MAX6341ESA?

The MAX6341ESA is rated for operation from –40°C to +85°C, as confirmed by its "E" grade suffix and Electrical Characteristics table in the official datasheet. This extended industrial temperature range ensures reliable performance in harsh environments such as factory automation controllers and outdoor test instrumentation. The MAX6341ESA maintains its 1.5ppm/°C max tempco and ±0.02% initial accuracy across this full range.

Does the MAX6341ESA require an external capacitor on the NR pin?

No, the NR pin on the MAX6341ESA is optional: a 1µF capacitor can be added to reduce wideband noise, but the device functions fully without it. When used, the capacitor improves noise performance without degrading settling time or stability. Leaving NR open results in nominal 1.5µV_p-p (0.1–10Hz) noise-still among the lowest in its class. The MAX6341ESA remains stable and functional with NR unconnected.

Can the MAX6341ESA drive a 10kΩ load while maintaining accuracy?

Yes, the MAX6341ESA can drive a 10kΩ load (409.6µA at 4.096V) with negligible error: its load regulation is specified at ≤7ppm/mA, meaning output shift is <±3ppm under this load. Combined with ±0.02% initial accuracy and 1.5ppm/°C tempco, total error remains well below 0.03% across temperature. The MAX6341ESA's ±15mA output capability far exceeds this requirement, ensuring margin for additional parallel loads or PCB trace resistance.

Is the MAX6341ESA pin-compatible with other devices in the MAX63xx family?

Yes, the MAX6341ESA shares identical 8-pin SO package and pinout with MAX6325ESA and MAX6350ESA-including IN, GND, NR, OUT, TRIM, and internally connected pins 1/7/8. This allows direct substitution between 2.5V, 4.096V, and 5V variants in existing layouts. However, output voltage and trim range differ: MAX6341ESA provides 4.096V ±24mV adjustment, whereas MAX6325ESA is 2.5V ±15mV and MAX6350ESA is 5V ±30mV.

What is the typical supply current of the MAX6341ESA at +25°C?

The typical supply current of the MAX6341ESA at +25°C is 2.9mA, as specified in the "ELECTRICAL CHARACTERISTICS-MAX6341" table under I_IN (Supply Current). This value is measured at V_IN = +10V and I_OUT = 0mA. Supply current remains stable across input voltage (8V–36V) and temperature (–40°C to +85°C), varying only ±0.5mA over full conditions-supporting predictable power budgeting in low-power precision systems.