Analog Devices Inc./Maxim Integrated MAX410ETA

Overview

The MAX410ETA from Maxim Integrated is a single-channel, precision, low-noise operational amplifier optimized for high-speed, low-voltage systems. It delivers 2.4nV/√Hz input voltage-noise density at 1kHz, 28MHz unity-gain bandwidth, and 4.5V/µs slew rate while operating from ±2.4V to ±5V supplies and consuming only 2.5mA per amplifier. It is used in ultra-low-noise instrumentation amplifiers and infrared detector front-ends.

For engineers reviewing the MAX410ETA datasheet, MAX410ETA pinout, MAX410ETA application, or MAX410ETA equivalent, key selection criteria include its guaranteed low-noise performance across -40°C to +85°C, TDFN-EP package thermal efficiency, ±250µV max offset voltage (B-grade), and stability driving up to 3900pF capacitive loads in unity-gain configuration.

Technical Context

The MAX410ETA employs a bipolar input stage engineered to minimize voltage noise without compromising DC accuracy or AC stability - achieving <2.4nV/√Hz at 1kHz while maintaining ±250µV max input offset and 115dB min open-loop gain. Its design omits input current-limiting resistors to preserve noise performance, relying instead on back-to-back clamp diodes for ±0.1V differential input protection.

It supports flexible supply operation from ±2.4V to ±5.25V, delivers ±3.6V output swing into 2kΩ at ±5V, and remains unity-gain stable with capacitive loads up to 3900pF. The exposed paddle of its 8-pin TDFN-EP package must be connected to V− (not ground) to ensure rated 1482mW power dissipation at +70°C.

Key Specifications

Pinout & Package

MAX410ETA is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.75mm height) package with exposed paddle. The paddle must be soldered to a V− thermal pad for optimal power handling and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, precision op amp applications.

Compared with OPA1611AIDR and ADA4898-1ARMZ, the MAX410ETA uniquely balances ultra-low voltage noise, low supply voltage operation (±2.4V), and TDFN thermal efficiency - making it the only option qualified for compact, battery-operated, low-Z sensor front-ends demanding <2.5nV/√Hz noise at 1kHz.

Availability

MAX410ETA is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable instrumentation, and infrared detection systems requiring stable component supply across extended temperature ranges.

Supply support for MAX410ETA 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.

The MAX410ETA belongs to Maxim's precision op amp product line, engineered specifically for low-noise, wideband signal conditioning in space- and power-constrained industrial and scientific instrumentation.

FAQ

What is the maximum capacitive load the MAX410ETA can drive stably in unity-gain configuration?

The MAX410ETA remains unity-gain stable when driving capacitive loads up to 3900pF, as verified in the Typical Operating Characteristics section (Figure 6a/b). This eliminates the need for external isolation resistors in most sensor buffer applications. For loads exceeding 3900pF, a series output resistor (e.g., 10Ω) is required to restore phase margin - a configuration validated in Figure 7a/b. The MAX410ETA's robust capacitive-drive capability directly supports direct connection to long cables or piezoelectric transducers without added compensation components.

Does the MAX410ETA require external input protection diodes?

The MAX410ETA integrates back-to-back clamp diodes at its inputs for ±0.1V differential protection but omits current-limiting resistors to preserve low-noise performance. Therefore, external series resistors are required if differential input voltages may exceed ±1.0V - to limit input current to ≤20mA per Absolute Maximum Ratings. These resistors must be low-value metal-film types to avoid degrading the 2.4nV/√Hz noise floor. The MAX410ETA's unprotected input architecture is intentional and documented in the Applications Information section for optimal noise-sensitive designs.

How is the exposed paddle of the MAX410ETA's TDFN-EP package connected?

The exposed paddle on the MAX410ETA's 8-pin TDFN-EP package must be soldered to the V− net (not ground) to achieve rated power dissipation of 1482mW at +70°C. Connecting it to V− provides optimal thermal conduction and minimizes ground-loop noise coupling into the sensitive input stage. Maxim explicitly states this requirement in the "TDFN Exposed Paddle Connection" subsection. Failure to connect the paddle results in derated thermal performance and potential instability under sustained load conditions.

What is the guaranteed input offset voltage specification for the MAX410ETA over its full operating temperature range?

The MAX410ETA (B-grade variant) guarantees a maximum input offset voltage of ±250µV at +25°C and ±400µV over its full −40°C to +85°C operating range, as specified in the "ELECTRICAL CHARACTERISTICS (V+ = 5V, V− = −5V, TA = −40°C to +85°C)" table. Its offset voltage tempco is ±1µV/°C, ensuring predictable drift behavior. This level of DC precision supports high-gain configurations in instrumentation amplifiers where offset-induced errors must remain below 0.01% of full-scale output.

Can the MAX410ETA operate from a single 5V supply?

Yes - the MAX410ETA supports single-supply operation with total supply voltages as low as 4.8V (e.g., V+ = 5V, V− = 0.2V), though its specified performance is guaranteed from ±2.4V to ±5.25V dual supplies. When operated single-ended, the input common-mode range extends from V− + 1.5V to V+ − 1.5V, and the output swing is limited to V+ − 1.4V and V− + 1.3V into 2kΩ. The MAX410ETA's rail-to-rail output is not claimed; its true output swing is asymmetric and supply-dependent, as detailed in the Electrical Characteristics tables.