Analog Devices Inc./Maxim Integrated MAX4163EBL+T

Overview

The MAX4163EBL+T from Maxim Integrated is a dual micropower rail-to-rail input/output operational amplifier in an 8-pin ultra chip-scale package (UCSP), delivering 200kHz gain-bandwidth product, 25μA quiescent current per amplifier, and true rail-to-rail operation from 2.5V to 10V single supply - ideal for pH probe signal conditioning and portable medical instrumentation.

For engineers reviewing the MAX4163EBL+T datasheet, MAX4163EBL+T pinout, MAX4163EBL+T application, or MAX4163EBL+T equivalent, this page provides verified technical context, validated UCSP pin mapping, real-world load-driving capability data, and two confirmed alternative op amps for low-power, single-supply sensor interface designs.

Technical Context

The MAX4163EBL+T employs a proprietary BiCMOS architecture with an internal charge pump generating ±2V auxiliary rails, enabling rail-to-rail input common-mode range extending 250mV beyond both supply rails and output swing within 30mV of rails at 10kΩ load - without mid-swing CMRR degradation. Its unity-gain stability holds across capacitive loads up to 1µF.

This architecture sustains >100dB CMRR and PSRR over –40°C to +85°C while maintaining 1.0pA typical input bias current and 85dB large-signal voltage gain into 10kΩ - critical for high-impedance electrochemical sensing where input leakage and common-mode rejection directly impact accuracy.

Key Specifications

Pinout & Package

The MAX4163EBL+T is housed in an 8-pin ultra chip-scale package (UCSP™) measuring 1.5mm × 1.5mm with 0.5mm pitch, requiring microvia-compatible PCB layout and lead-free reflow profile (peak 260°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual micropower rail-to-rail op amp applications.

Compared with MAX4163ESA+ and TLV2462IDR, the MAX4163EBL+T uniquely combines UCSP miniaturization, true sub-rail input capability, and 1.0pA bias current - making it irreplaceable for high-impedance, space-constrained, single-supply electrochemical sensing.

Availability

MAX4163EBL+T is available at Aetrix Electronics and suitable for pH probe signal conditioning, portable medical instrumentation, and ionization detector interface requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.

Supply support for MAX4163EBL+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 and mixed-signal ICs for demanding industrial, medical, and portable applications - emphasizing low power, high accuracy, and robust integration.

The MAX4162/MAX4163/MAX4164 family targets ultra-low-power sensor signal chains where micropower consumption, rail-to-rail operation, and sub-picoamp input bias are mandatory - especially in electrochemical, biomedical, and battery-operated measurement systems.

FAQ

What is the maximum capacitive load the MAX4163EBL+T can drive while remaining stable?

The MAX4163EBL+T is unity-gain stable with any capacitive load, including up to 1µF as verified in the datasheet's LARGE CAPACITIVE-LOAD DRIVE test (Figure MAX4162-36). This eliminates need for isolation resistors in sensor filter stages or long-cable driving applications - a key advantage over many micropower op amps that require external compensation.

Does the MAX4163EBL+T support true rail-to-rail input when powered from 2.5V?

Yes - the MAX4163EBL+T guarantees input common-mode range from VSS – 0.25V to VDD + 0.25V across its full 2.5V–10V supply range. At 2.5V supply, this means inputs function from –0.25V to +2.75V, enabling direct interface to sensors whose output dips below ground or exceeds VDD - critical for pH probes and thermopile amplifiers.

How does the internal charge pump in the MAX4163EBL+T affect system noise performance?

The MAX4163EBL+T's internal 700kHz charge pump introduces ≤100µV_P-P switching feedthrough at the output, independent of gain and not referred to input. This noise lies well beyond the device's 200kHz bandwidth and is typically filtered by downstream ADC sampling or system bandwidth limits - verified in THD+N vs. frequency plots (MAX4162-21b).

Can the MAX4163EBL+T operate from a 2.0V supply despite the 2.5V minimum rating?

While the absolute minimum specified supply is 2.5V, the datasheet notes "full rail-to-rail operation typically extends below 2.0V" (Applications Information section). Real-world testing shows functional rail-to-rail I/O at 2.0V, but designers should validate stability, offset, and bandwidth for their specific layout and load - particularly for production-critical medical devices.

What is the recommended PCB layout practice for the UCSP package of the MAX4163EBL+T?

For the MAX4163EBL+T UCSP, use microvia-compatible land patterns per Maxim's package drawing B9-5, ensure solder mask defined pads, apply controlled-depth stencil for 0.1mm paste thickness, and avoid thermal relief on VDD/VSS pads to maintain low-impedance supply paths. Refer to Maxim Application Note "Wafer-Level Ultra-Chip-Board-Scale-Package" for mechanical stress mitigation guidelines.