Analog Devices Inc./Maxim Integrated MAX418CPD

Overview

MAX418CPD from Maxim Integrated is a quad, single-supply operational amplifier optimized for ultra-low-power sensor signal conditioning in battery-powered systems, featuring 1.2µA maximum supply current per amplifier, 100kHz gain-bandwidth product, and rail-to-rail output swing at 0°C to +70°C temperature range in 14-pin plastic DIP package.

For engineers reviewing the MAX418CPD datasheet, MAX418CPD pinout, MAX418CPD application, or MAX418CPD equivalent, this device supports precision low-power analog front-ends in portable medical monitors, environmental sensors, and industrial data loggers where supply current, input bias current (1pA typ), and output drive capability into 10kΩ loads are critical selection criteria.

Technical Context

The MAX418CPD integrates four independent op-amps on a single die with matched DC characteristics across channels, designed for operation from +2.7V to +6.5V single supply. It uses CMOS input stage architecture enabling femtoampere-level input bias current and high input impedance (>10¹²Ω).

Its internal compensation ensures unity-gain stability without external components, and the rail-to-rail output stage delivers >98% of full-scale swing into 10kΩ loads, supporting accurate signal translation in low-voltage ADC driver and transducer interface roles.

Key Specifications

Pinout & Package

MAX418CPD is housed in a 14-pin plastic dual in-line package (PDIP) with 0.300-inch body width and standard through-hole footprint per package code P14-3 (document 21-0043).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad, low-power, single-supply op amp applications.

Compared with TLV2464CDR and LP324DR, the MAX418CPD uniquely delivers 1.2µA/channel supply current with rail-to-rail output and 1pA input bias-enabling decade-scale battery operation in ultra-low-power sensor nodes where other alternatives compromise on at least two of these three parameters.

Availability

MAX418CPD is available at Aetrix Electronics and suitable for portable medical monitors, environmental sensor nodes, and industrial data loggers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX418CPD 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 MAX406/MAX407/MAX409/MAX417–MAX419 family was engineered specifically for ultra-low-power, single-supply sensor signal conditioning in space- and energy-constrained portable electronics.

FAQ

What is the maximum supply current specification for MAX418CPD?

The MAX418CPD has a maximum supply current of 1.2µA per amplifier at +25°C and V_CC = +5V, measured across all four channels simultaneously. This value is guaranteed over the full 0°C to +70°C operating temperature range and defines the upper limit for battery-life calculations in always-on sensor nodes. The MAX418CPD maintains this ultra-low quiescent current while delivering rail-to-rail output swing and 100kHz gain-bandwidth product.

Does MAX418CPD support rail-to-rail input voltage range?

No, the MAX418CPD features rail-to-rail *output* swing but does not support rail-to-rail *input*. Its input common-mode voltage range extends from V_EE to (V_CC – 1.2V) in single-supply operation. This design allows robust operation with high-impedance sensors while maintaining 1pA typical input bias current. For true rail-to-rail input capability, alternative op-amps such as the MAX4475 must be evaluated separately from the MAX418CPD.

What is the input offset voltage specification for MAX418CPD?

The MAX418CPD has a maximum input offset voltage of 1.5mV at +25°C, with typical value of 0.5mV. This parameter is tested across all four amplifiers in the package and remains stable over the 0°C to +70°C temperature range. The offset voltage directly impacts DC accuracy in precision sensor interfaces-making the MAX418CPD suitable for 10-bit system resolution without trimming, unlike higher-offset alternatives that require calibration circuitry or software correction.

Can MAX418CPD operate from a single 3.3V supply?

Yes, the MAX418CPD is fully specified for operation from a single +2.7V to +6.5V supply, including +3.3V nominal rails. At V_CC = +3.3V, it delivers rail-to-rail output swing into 10kΩ loads, maintains 1.2µA per amplifier supply current, and retains 100kHz gain-bandwidth product. This makes the MAX418CPD compatible with modern low-voltage microcontrollers and ADCs without level-shifting or charge-pump circuitry-unlike older op-amps requiring ≥5V supplies.

Is MAX418CPD pin-compatible with other devices in the MAX417–MAX419 family?

Yes, the MAX418CPD shares identical 14-pin PDIP pinout and electrical functionality with MAX417CPA, MAX419CPD, and all other 'C' grade 14-pin variants in the family. Pin assignments for IN+, IN–, OUT, V+, and V– are standardized across MAX417/MAX418/MAX419 quad op-amps in 14-pin packages, enabling direct substitution within the same temperature grade. However, note that MAX417 is dual, MAX418 is quad, and MAX419 is quad with different offset/bias specifications-so functional equivalence requires verification per application.