Analog Devices Inc./Maxim Integrated MAX1162BCUB+

Overview

MAX1162BCUB+ from Maxim Integrated is a 16-bit successive-approximation analog-to-digital converter (ADC) designed for precision data acquisition in space- and power-constrained systems. It operates from a single +5V analog supply with independent +2.7V to +5.25V digital logic interface, delivers 200ksps sampling rate, achieves ±2 LSB INL at 0°C to +70°C, and consumes only 2.75mA at full speed-enabling high-resolution sensing in battery-powered motor control and industrial I/O modules.

For engineers reviewing the MAX1162BCUB+ datasheet, MAX1162BCUB+ pinout, MAX1162BCUB+ application, or MAX1162BCUB+ equivalent, this page provides verified technical context, real-world timing behavior, confirmed package mapping to 10-pin µMAX, validated SPI/QSPI/MICROWIRE interface timing, and two rigorously cross-checked alternative parts for design continuity.

Technical Context

The MAX1162BCUB+ integrates an internal track-and-hold with 4MHz small-signal input bandwidth and a capacitive DAC-based SAR architecture. Its conversion sequence is initiated by CS falling edge, requires 24 SCLK cycles (at up to 4.8MHz), and outputs 16-bit unipolar data preceded by eight leading zeros on DOUT.

It supports AutoShutdown™ mode: driving CS high reduces total supply current to ≤10µA, while fast 1.1µs wakeup enables burst-mode acquisition. The analog input range is 0 to VREF (3.8V–AVDD), with internal reference buffering requiring a 4.7µF capacitor on REF and separate AGND/DGND planes for noise isolation.

Key Specifications

Pinout & Package

MAX1162BCUB+ is housed in a lead(Pb)-free, RoHS-compliant 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), optimized for high-density PCB layouts. Thermal pad is not electrically connected; pins 3 and 9 must be tied together at star AGND point.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with MAX1162BCUB+, ADS8325IPW offers tighter INL but sacrifices 100ksps speed and interface flexibility, while AD7682BRMZ delivers higher throughput and extended temperature rating at the cost of increased power and loss of independent digital supply rail.

Availability

MAX1162BCUB+ is available at Aetrix Electronics and suitable for motor control feedback, industrial thermocouple interfaces, and portable data loggers requiring stable component supply across extended production lifecycles.

Supply support for MAX1162BCUB+ 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 communications applications.

The MAX1162 family targets low-power, high-resolution data acquisition systems-emphasizing small footprint, flexible digital interfacing, and robust performance under varying supply and temperature conditions.

FAQ

What is the maximum sampling rate of the MAX1162BCUB+ and what clock frequency is required?

The MAX1162BCUB+ achieves a maximum sampling rate of 200ksps, which requires a serial clock (SCLK) frequency of 4.8MHz-since each conversion consumes exactly 24 clock cycles. At lower SCLK frequencies (e.g., 2.4MHz), the sampling rate scales linearly to 100ksps. Operating below 100kHz risks reduced DC accuracy due to internal leakage effects, as specified in the datasheet timing section.

Does the MAX1162BCUB+ require an external reference, and what are its voltage and loading requirements?

Yes, the MAX1162BCUB+ requires an external reference applied to the REF pin, with a valid range of +3.8V to AVDD (up to +5.25V). During conversion, the reference must supply up to 100µA DC load current and exhibit ≤10Ω output impedance. A 4.7µF low-ESR capacitor is mandatory between REF and AGND; adding a parallel 0.1µF ceramic capacitor improves high-frequency noise rejection. The MAX1162BCUB+ does not include an internal reference.

How does the AutoShutdown™ feature work on the MAX1162BCUB+, and what is its typical current draw?

AutoShutdown™ is activated by driving the CS pin high, placing the MAX1162BCUB+ into ultra-low-power mode with total supply current ≤10µA (typical 0.1µA). A falling edge on CS wakes the device in 1.1µs and initiates conversion. This behavior is fully documented in the Functional Description section and confirmed across all electrical characteristics tables for the MAX1162BCUB+ ordering option.

Can the MAX1162BCUB+ interface directly with a 3.3V microcontroller, and how is level compatibility achieved?

Yes, the MAX1162BCUB+ supports direct interfacing with 3.3V microcontrollers via its independent DVDD pin, which accepts +2.7V to +5.25V. Digital inputs (CS, SCLK) recognize logic high at ≥0.7×DVDD and logic low at ≤0.3×DVDD-so with DVDD = +3.3V, VIH ≥2.31V and VIL ≤0.99V, matching standard 3.3V CMOS thresholds. DOUT drives to DVDD − 0.25V (min) under load, ensuring clean logic-high levels into 3.3V receivers.

What is the input voltage range and protection scheme for the AIN pin on the MAX1162BCUB+?

The AIN pin on the MAX1162BCUB+ accepts unipolar input voltages from 0V to VREF (e.g., 0V to +4.096V). Internal ESD protection diodes clamp AIN to AGND −0.3V and AVDD +0.3V. If the input exceeds these limits by more than 300mV, external series resistance must limit current to ≤10mA to prevent damage. Input capacitance is 40pF, and source impedance <1kΩ is recommended to meet the 1.1µs acquisition time specification.