Analog Devices Inc./Maxim Integrated MAX6008AESA+T

Overview

MAX6008AESA+T from Maxim Integrated is a precision 2.5V two-terminal shunt voltage reference in an 8-pin SO package, featuring 0.2% initial accuracy, 30ppm/°C temperature coefficient over -40°C to +85°C, and guaranteed operating current <1µA. It serves as a low-power, high-accuracy voltage reference for ADC/DAC biasing, portable metering, and battery-powered sensor signal conditioning.

For engineers reviewing the MAX6008AESA+T datasheet, MAX6008AESA+T pinout, MAX6008AESA+T application, or MAX6008AESA+T equivalent, key selection criteria include ultra-low quiescent current (≤1µA), tight initial tolerance (±0.2%), stable 2.5V output under varying load/supply conditions, and SO-package thermal performance (θ_JA = 136°C/W) for space-constrained industrial and portable designs.

Technical Context

The MAX6008AESA+T implements a laser-trimmed series bandgap core with on-chip thin-film resistors to achieve 0.2% factory-set output accuracy at 2.5V. Its two-terminal architecture requires external bias resistor (R_Bias) and 0.01µF minimum output bypass capacitance for stability.

It operates across 1µA–2mA reverse current range with <2.5mV total voltage change from 1.2µA to 2mA, 2Ω typical dynamic impedance, and 60µV_P-P low-frequency noise (0.1Hz–10Hz), enabling high-resolution analog measurements without additional filtering.

Key Specifications

Pinout & Package

MAX6008AESA+T uses an 8-pin SO package (package code S8+2, outline 21-0041) with thermal resistance θ_JA = 136°C/W on multilayer board. Pin 1 is OUT, Pin 4 is GND; Pins 1, 2, 3, 5, 7 are N.C., Pin 6 and Pin 8 are internally connected to OUT (redundant output terminals).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM4040C25IDBZR and REF3025AIDBZR, MAX6008AESA+T uniquely balances 0.2% accuracy, 30ppm/°C TC, and sub-1µA operation in an SO package-making it optimal for high-precision, battery-limited industrial sensors where thermal margin and long-term stability are non-negotiable.

Availability

MAX6008AESA+T is available at Aetrix Electronics and suitable for portable medical devices, precision data loggers, industrial 4–20mA transmitters, and battery-powered test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6008AESA+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, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX6006–MAX6009 family targets ultra-low-power, high-accuracy voltage references for space-constrained and battery-operated systems where traditional references consume too much current or lack sufficient stability.

FAQ

What is the guaranteed minimum operating current for MAX6008AESA+T?

The guaranteed minimum operating current for MAX6008AESA+T is 1.0µA maximum-meaning it will maintain regulation with as little as 1.0µA flowing from OUT to GND. This value is tested to ensure <0.2% output voltage deviation from its 2.5V nominal value at +25°C, enabling reliable operation in energy-harvesting and coin-cell applications where current budgets are sub-microamp.

Does MAX6008AESA+T require an external capacitor, and what value is recommended?

Yes, MAX6008AESA+T requires an external capacitor from OUT to GND for stability. The datasheet specifies a minimum of 0.01µF ceramic capacitor, which suppresses high-frequency oscillation and improves transient response during load steps. Larger values (e.g., 0.1µF) further reduce overshoot in systems with rapidly varying loads, such as multiplexed sensor arrays driving the reference through switching paths.

How does the 8-pin SO package of MAX6008AESA+T improve thermal performance compared to the SOT23 version?

The 8-pin SO package of MAX6008AESA+T delivers significantly better thermal performance than the 3-pin SOT23 variant, with θ_JA = 136°C/W versus 274°C/W. This allows MAX6008AESA+T to dissipate up to 588mW continuously at +70°C ambient before derating, supporting higher bias currents and more robust operation in enclosed industrial enclosures where airflow is limited-critical for maintaining 2.5V accuracy without thermal runaway.

Can MAX6008AESA+T replace LT1004 in existing designs?

Yes, MAX6008AESA+T is explicitly offered as a plug-in upgrade for LT1004 in 8-pin SO packages. It matches LT1004's pinout (OUT on Pin 1, GND on Pin 4), provides tighter 0.2% initial accuracy versus LT1004's 1%, and reduces operating current from ~20µA to <1µA-enabling direct substitution without PCB changes while improving accuracy and extending battery life in legacy portable equipment.

What is the low-frequency noise specification of MAX6008AESA+T, and why does it matter for precision ADCs?

MAX6008AESA+T has a low-frequency noise of 60µV_P-P over 0.1Hz–10Hz. This matters because precision delta-sigma ADCs used in weigh scales and medical instruments integrate noise over this band; excessive 1/f noise directly degrades effective resolution. At 2.5V full scale, 60µV_P-P corresponds to ~10.5 bits of noise-free code-ensuring clean 16-bit conversion when paired with proper filtering and layout.