Analog Devices Inc./Maxim Integrated MAX11642EEG+T

Overview

MAX11642EEG+T from Maxim Integrated is a 16-channel, 8-bit successive-approximation ADC with integrated track-and-hold, 16-entry FIFO, internal 4.096V reference, and SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. It operates from a +4.75V to +5.25V supply, achieves 300ksps sampling rate with external clocking, and delivers ±0.5 LSB INL/DNL over –40°C to +85°C - used in industrial sensor data acquisition where multichannel, low-latency, and self-contained timing are critical.

For engineers reviewing the MAX11642EEG+T datasheet, MAX11642EEG+T pinout, MAX11642EEG+T application, or MAX11642EEG+T equivalent, key selection criteria include unipolar 0–VREF input range, 24-pin QSOP package compatibility, FIFO-buffered burst scanning capability, and internal clock mode support for autonomous conversion sequencing without CPU intervention.

Technical Context

The MAX11642EEG+T implements a SAR architecture with on-chip track-and-hold supporting 16 single-ended analog inputs (AIN0–AIN15), where CNVST/AIN15 serves dual role as conversion trigger or channel input. Its internal oscillator enables clock modes 00/01/10 for autonomous scan control, while clock mode 11 supports externally timed 300ksps operation via SCLK up to 10MHz.

It integrates a 4.096V internal reference with ±20ppm/°C drift, 200µVRMS noise, and 6.5kΩ output impedance; accepts external references from 1V to VDD. The 16-deep FIFO allows non-blocking multi-sample capture, and AutoShutdown reduces current to ≤5µA during idle periods.

Key Specifications

Pinout & Package

MAX11642EEG+T is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7953IRHBT and AD7490BRUZ, the MAX11642EEG+T trades resolution for integrated features - its on-chip FIFO, AutoShutdown, and internal 4.096V reference reduce system-level design effort and component count, making it optimal for compact, low-power, self-timed monitoring applications rather than high-precision measurement systems.

Availability

MAX11642EEG+T is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, environmental data loggers, and motor drive current sensing requiring stable component supply and long-term production continuity.

Supply support for MAX11642EEG+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, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX116xx family targets low-power, multichannel data acquisition in space-constrained systems - emphasizing integrated references, autonomous scan modes, and minimal external component requirements for rapid sensor interface deployment.

FAQ

What is the maximum sampling rate achievable with the MAX11642EEG+T?

The MAX11642EEG+T achieves a maximum sampling rate of 300ksps when using an external clock (SCLK) in clock mode 11. This requires SCLK frequencies up to 10MHz with proper timing margins; internal clock modes limit rate to ~200ksps due to oscillator tolerance and acquisition overhead. The 300ksps figure assumes ideal signal conditioning and 4.8MHz SCLK with 50% duty cycle as specified in the Electrical Characteristics table.

Does the MAX11642EEG+T require an external reference voltage?

No, the MAX11642EEG+T does not require an external reference voltage - it includes a factory-trimmed 4.096V internal reference with ±0.7% initial accuracy and ±20ppm/°C temperature coefficient. The REF pin can be left unconnected or bypassed with 0.1µF to GND. An external reference (1V to VDD) may be used instead by configuring the setup register, but it is optional.

How many analog input channels does the MAX11642EEG+T support?

The MAX11642EEG+T supports 16 single-ended analog input channels: AIN0 through AIN14 (pins 1–15), plus AIN15 multiplexed with the CNVST function on pin 16. All 16 channels are accessible simultaneously in scan mode, and channel selection is programmable via the conversion register's CHSEL bits and NSCAN configuration.

What package type is used for the MAX11642EEG+T?

The MAX11642EEG+T is supplied in a 24-pin QSOP (Quarter-Size Outline Package) with 0.635mm lead pitch, dimensions 5.0mm × 7.5mm. It is RoHS-compliant and lead-free (+T suffix denotes tape-and-reel packaging). This package provides adequate thermal performance (θJA = 88°C/W) for industrial ambient temperatures up to +85°C.

Can the MAX11642EEG+T operate from a 3.3V supply?

No, the MAX11642EEG+T is specified only for +4.75V to +5.25V supply operation. It belongs to the MAX11642/MAX11643 pair where MAX11642 uses the 5V supply range and 4.096V internal reference, while MAX11643 supports 2.7V–3.6V and 2.5V reference. Using 3.3V on MAX11642EEG+T violates absolute maximum ratings and will result in improper reference generation, conversion failure, or device damage.