Analog Devices Inc./Maxim Integrated MAX11618EEE+

Overview

The MAX11618EEE+ from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated 4.096V internal reference, 4-channel single-ended analog input, and 16-entry FIFO buffer. It operates from a +4.75V to +5.25V supply, features SPI/QSPI/MICROWIRE-compatible 3-wire interface, and supports scan mode, internal averaging, and AutoShutdown™ for low-power system supervision in industrial control and data-logging applications.

For engineers reviewing the MAX11618EEE+ datasheet, MAX11618EEE+ pinout, MAX11618EEE+ application, or MAX11618EEE+ equivalent, key selection considerations include its 4-channel count, 4.096V internal reference voltage, 16-pin QSOP package, ±1 LSB INL/DNL accuracy over –40°C to +85°C, and support for externally clocked 300ksps sampling - critical for deterministic timing in embedded monitoring systems.

Technical Context

This SAR ADC integrates an on-chip track-and-hold circuit, internal oscillator (±10% accuracy at 4.4MHz), and configurable clock modes (CKSEL[1:0]) enabling conversion start via CNVST pin or serial command. It supports unipolar 0–VREF input range with 1MHz small-signal bandwidth and requires ≤300Ω source impedance for full AC performance without extended acquisition time.

The device implements a 16-deep FIFO that buffers conversion results independently of serial bus activity, allowing background sampling while host processor handles other tasks. Internal reference output (4.096V ±20ppm/°C) drives the ADC core and is available at the REF pin, supporting external buffering or sharing across multiple devices in synchronized acquisition systems.

Key Specifications

Pinout & Package

MAX11618EEE+ is housed in a 16-pin QSOP (Quad Small Outline Package) with 0.154" body width and 0.025" lead pitch, optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit multichannel ADC applications.

Compared with ADS7822U and MAX11100ETE+, the MAX11618EEE+ uniquely balances 5V operation, integrated 4.096V reference, and 4-channel optimization in a compact 16-pin QSOP - making it optimal for cost-sensitive, space-constrained industrial monitoring where 10-bit resolution suffices.

Availability

MAX11618EEE+ is available at Aetrix Electronics and suitable for industrial process monitoring, embedded system supervision, and portable data-logging applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX11618EEE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications markets.

The MAX11618EEE+ belongs to Maxim's precision data-acquisition ADC family, designed specifically for low-power, multichannel system monitoring in space-constrained industrial and portable instrumentation.

FAQ

What is the internal reference voltage of the MAX11618EEE+?

The MAX11618EEE+ features a factory-trimmed 4.096V internal reference with ±20ppm/°C temperature coefficient and 200µVRMS output noise. This reference is used for ADC conversion and is available at the REF pin, requiring a 0.1µF bypass capacitor to GND for stability. It eliminates the need for an external reference IC in most applications.

How many analog input channels does the MAX11618EEE+ support?

The MAX11618EEE+ supports exactly 4 single-ended analog input channels (AIN0–AIN3). Unlike higher-channel variants (e.g., MAX11620/MAX11624), pins 5–7 are no-connect, and pin 8 is dedicated solely to CNVST - confirming its fixed 4-channel architecture per datasheet ordering table and pin description.

What package type is used for the MAX11618EEE+?

The MAX11618EEE+ is supplied in a 16-pin QSOP (Quad Small Outline Package) with 0.154" body width and standard gull-wing leads. The "EEE+" suffix explicitly denotes this RoHS-compliant QSOP variant, verified in Maxim's official ordering information table and package drawings.

Does the MAX11618EEE+ support differential input mode?

No, the MAX11618EEE+ supports only single-ended unipolar inputs (0 to VREF). Its internal architecture uses a grounded negative input capacitor (per Figure 3 equivalent circuit), and the datasheet confirms unipolar operation exclusively - no differential or bipolar input configuration is available for this variant.

What is the maximum sampling rate achievable with the MAX11618EEE+?

The MAX11618EEE+ achieves a maximum sampling rate of 300ksps when using an external SCLK up to 4.8MHz in clock mode 11. In internally clocked modes (00/01/10), the effective rate is lower due to oscillator tolerance and overhead; actual sustained throughput depends on FIFO management and host readout speed.