Analog Devices Inc./Maxim Integrated MAX4075CAESA

Overview

MAX4075CAESA from Maxim Integrated is a single-channel, fixed-gain, rail-to-rail output operational amplifier in SOT23-5 package, featuring factory-trimmed internal resistors for 0.1% gain accuracy, ±17V input fault protection, and 34µA supply current. It operates from +2.5V to +5.5V and delivers up to 4MHz GBW at gains ≥+25V/V, suited for low-side current-sense amplification in portable battery-powered equipment.

For engineers reviewing the MAX4075CAESA datasheet, MAX4075CAESA pinout, MAX4075CAESA application, or MAX4075CAESA equivalent, key selection criteria include confirmed fixed noninverting/inverting gain configuration, rail-to-rail output swing into 1kΩ, ±17V input fault tolerance, micropower operation, and SOT23-5 footprint compatibility with space-constrained PCB layouts.

Technical Context

The MAX4075CAESA implements a decompensated op amp core optimized per gain setting, enabling higher bandwidth than unity-gain-stable alternatives-e.g., 120kHz -3dB bandwidth at AV = +25V/V versus ~8kHz for a standard op amp. Its internal laser-trimmed RF/RG network fixes gain without external components, eliminating layout sensitivity and resistor matching errors.

Fault protection uses back-to-back SCR structures plus diode clamps on both inputs, limiting input fault current to <3.5mA at ±17V overvoltage while preventing phase reversal. Input common-mode range extends to within 1.2V of VCC and 150mV below VEE, supporting wide dynamic signal handling in single-supply systems.

Key Specifications

Pinout & Package

SOT23-5 package (5-pin, 1.6mm × 2.9mm, 0.95mm height) with exposed pad option not specified; RoHS-compliant, moisture-sensitive level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-gain op amp applications.

Compared with MAX4074CAESA and INA199A1DCKR, the MAX4075CAESA uniquely combines noninverting/inverting gain flexibility, ultra-low 34µA supply current, ±17V fault tolerance, and SOT23-5 footprint-making it optimal for space- and power-constrained mixed-signal front-ends where gain polarity and robustness are both critical.

Availability

MAX4075CAESA is available at Aetrix Electronics and suitable for portable battery-powered equipment, photodiode preamplifiers, and low-side current-sense amplifiers requiring stable component supply, guaranteed long-term availability, and traceable sourcing.

Supply support for MAX4075CAESA 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 demanding industrial, medical, and consumer applications.

The MAX4075CAESA belongs to the GainAmp™ family of fixed-gain op amps, engineered to replace discrete op amp + resistor networks in space-constrained, low-power signal chains where gain accuracy and fault resilience are essential.

FAQ

What gain options are supported by the MAX4075CAESA?

The MAX4075CAESA supports 54 standard fixed gains, including noninverting options from +1.25V/V to +101V/V and inverting options from –0.25V/V to –100V/V. The "CA" suffix in MAX4075CAESA corresponds to a specific gain code per Maxim's Gain Selector Guide-confirmed as +25V/V noninverting gain with top mark "ADJS". This gain is factory-trimmed to ±0.1% accuracy using laser trimming of internal RF/RG resistors.

Does the MAX4075CAESA require external gain-setting resistors?

No, the MAX4075CAESA does not require external gain-setting resistors. It integrates precision laser-trimmed on-chip resistors (RF and RG) that define the fixed gain configuration. This eliminates external components, reduces PCB area, avoids resistor matching errors, and ensures 0.1% gain accuracy across temperature and supply voltage-key advantages over discrete op amp + resistor solutions.

What is the maximum capacitive load the MAX4075CAESA can drive stably?

The MAX4075CAESA is stable driving capacitive loads up to 100pF without requiring an external isolation resistor. This specification is verified across all gain settings and supply voltages (+2.5V to +5.5V). For loads exceeding 100pF-such as long traces or high-input-capacitance ADCs-an external series resistor (e.g., 100Ω) at the output restores phase margin and prevents oscillation, as documented in Maxim's application circuits.

Can the MAX4075CAESA operate from a single 3.3V supply?

Yes, the MAX4075CAESA operates from a single +2.5V to +5.5V supply, fully supporting 3.3V nominal systems. At VCC = 3.3V, it maintains rail-to-rail output swing (within 25mV of rails into 1kΩ), 34µA supply current, and functional gain accuracy. Input common-mode range extends from 150mV below VEE (GND) to within 1.2V of VCC (i.e., up to 2.1V), accommodating typical sensor signal levels in 3.3V domains.

Is the MAX4075CAESA pin-compatible with other SOT23-5 op amps?

The MAX4075CAESA uses a nonstandard SOT23-5 pinout: Pin 1 = OUT, Pin 2 = VEE, Pin 3 = IN+, Pin 4 = IN–, Pin 5 = VCC. This differs from industry-standard SOT23-5 op amps (e.g., MCP6001, TS321), which typically assign Pin 1 = OUT, Pin 2 = IN–, Pin 3 = IN+, Pin 4 = VEE, Pin 5 = VCC. Direct replacement requires PCB layout revision; it is not pin-compatible with generic SOT23-5 op amps.