Analog Devices Inc./Maxim Integrated MAX1062ACUB+

Overview

MAX1062ACUB+ from Maxim Integrated is a 14-bit successive-approximation analog-to-digital converter (ADC) with SPI/QSPI/MICROWIRE-compatible serial interface, 200ksps maximum sampling rate, ±1 LSB INL, and 10µA shutdown current. It operates from a single +5V analog supply (AVDD = 4.75V to 5.25V) with independent 2.7V–5.25V digital supply (DVDD), enabling direct interfacing to mixed-voltage microcontrollers in portable data-acquisition systems.

For engineers reviewing the MAX1062ACUB+ datasheet, MAX1062ACUB+ pinout, MAX1062ACUB+ application, or MAX1062ACUB+ equivalent, this page delivers verified technical context, real-world timing constraints, validated power-performance tradeoffs at 10ksps/200ksps, and precise interface compatibility with SPI master controllers - all critical for low-power sensor front-end and industrial I/O design.

Technical Context

The MAX1062ACUB+ implements a SAR architecture with integrated track-and-hold (T/H), delivering 4MHz small-signal input bandwidth and 1.1µs acquisition time. Its conversion sequence is initiated by CS falling edge and driven by SCLK up to 4.8MHz, outputting 14-bit unipolar data plus two sub-bits (S1/S0) as 24-bit serial stream (eight leading zeros + 14 data bits + 2 sub-bits).

AutoShutdown™ is controlled solely via CS pin: high state forces shutdown (≤10µA total supply current), while low state enables full operation. The device features separate analog (AGND) and digital (DGND) ground pins, internal reference buffering support, and input protection diodes allowing AIN swing from AGND −0.3V to AVDD +0.3V.

Key Specifications

Pinout & Package

MAX1062ACUB+ is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed pad (EP). Pin 1 is REF; pins 3 and 9 are AGND (must be connected together at star point); pin 7 is DGND; pin 10 is AIN.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit SAR ADC applications.

Compared with ADS8325IPW and AD7940BRMZ, the MAX1062ACUB+ uniquely balances 14-bit precision, 200ksps throughput, sub-10µA shutdown, and dual-supply interface flexibility - making it optimal for space-constrained, battery-aware industrial and portable designs requiring rapid wake-up and mixed-voltage MCU integration.

Availability

MAX1062ACUB+ is available at Aetrix Electronics and suitable for motor control, industrial I/O modules, thermocouple measurement, and portable/battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1062ACUB+ 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, automotive, and communications markets.

The MAX1062 family was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing fast wake-up, flexible digital interfacing, and robust DC/dynamic performance across commercial temperature grades.

FAQ

What is the guaranteed integral nonlinearity (INL) specification for MAX1062ACUB+?

The MAX1062ACUB+ guarantees ±1 LSB INL over its full operating temperature range (0°C to +70°C), per the Ordering Information table. This is the 'A' grade variant, distinct from the ±2 LSB (B) and ±3 LSB (C) versions. The specification ensures end-point linearity error remains below 0.006% of full scale, critical for calibration-sensitive applications like thermocouple measurement where MAX1062ACUB+ is commonly deployed.

Does MAX1062ACUB+ require an external reference voltage, and what are the key requirements?

Yes, MAX1062ACUB+ requires an external reference applied to the REF pin. The reference voltage must be between 3.8V and AVDD (4.75V–5.25V), with recommended value 4.096V for optimal 250µV/LSB scaling. It must be bypassed to AGND with a 4.7µF low-ESR capacitor, and the source impedance must be ≤10Ω to deliver 100µA transient load during conversion without degrading accuracy.

How does the AutoShutdown™ feature work on MAX1062ACUB+, and what is the typical shutdown current?

AutoShutdown™ on MAX1062ACUB+ is activated by driving the CS pin high. In this state, the device draws ≤10µA total supply current (IAVDD + IDVDD), verified across temperature and supply voltage. The wake-up time from shutdown to valid conversion is ≤1.1µs after CS is pulled low. This behavior is intrinsic to the MAX1062ACUB+ silicon design and requires no configuration registers or additional control signals.

Can MAX1062ACUB+ interface directly with a 3.3V microcontroller SPI port?

Yes, MAX1062ACUB+ supports direct 3.3V SPI interfacing because its DVDD pin accepts 2.7V–5.25V logic supplies, and its digital inputs (CS, SCLK) have VIH = 0.7×DVDD and VIL = 0.3×DVDD thresholds. When DVDD = 3.3V, the MAX1062ACUB+ accepts standard 3.3V logic levels, and DOUT outputs VOH ≥ 3.05V and VOL ≤ 0.4V - compatible with most 3.3V MCU inputs without level shifters.

What is the maximum serial clock (SCLK) frequency supported by MAX1062ACUB+, and are there duty cycle constraints?

MAX1062ACUB+ supports SCLK frequencies up to 4.8MHz, but requires a duty cycle between 40% and 60% at that maximum rate. For reliable operation, minimum high and low times must each be ≥65ns. At lower frequencies (e.g., 1MHz), strict duty cycle control is relaxed, but conversions below 100kHz may suffer reduced DC accuracy due to internal leakage effects documented in the Electrical Characteristics table.