Analog Devices Inc./Maxim Integrated MAX1062AEUB+T

Overview

The MAX1062AEUB+T from Maxim Integrated is a 14-bit, single-supply +5V successive-approximation analog-to-digital converter (SAR ADC) with 200ksps maximum sampling rate, ±1 LSB INL accuracy, 4MHz input bandwidth, and 10µA shutdown current. It features SPI/QSPI/MICROWIRE-compatible serial interface, internal track-and-hold, and operates across –40°C to +85°C for industrial data-acquisition systems.

For engineers reviewing the MAX1062AEUB+T datasheet, MAX1062AEUB+T pinout, MAX1062AEUB+T application, or MAX1062AEUB+T equivalent, this page delivers verified electrical specs, thermal operating range confirmation, µMAX package footprint details, and real-world interface timing constraints for embedded microcontroller integration.

Technical Context

The MAX1062AEUB+T implements a capacitive DAC-based SAR architecture with internal track-and-hold, enabling precise sampling of signals up to 4MHz bandwidth. Its conversion sequence is initiated by CS falling edge and driven by SCLK, requiring exactly 24 clock cycles per 14-bit result plus two sub-bits (S1/S0), with eight leading zeros in unipolar serial output format.

Power management is controlled via CS: high state forces shutdown (≤10µA total supply current), while low state enables full operation with AutoShutdown™ reducing current to 140µA at 10ksps. Analog and digital supplies are independent (AVDD = 4.75–5.25V, DVDD = 2.7–5.25V), supporting direct interfacing with mixed-voltage logic systems.

Key Specifications

Pinout & Package

MAX1062AEUB+T is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), optimized for space-constrained PCB layouts in portable and industrial modules. Thermal pad on underside improves power dissipation in continuous acquisition modes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7940BRMZ, the MAX1062AEUB+T uniquely combines 200ksps throughput, 5V-tolerant digital interface, integrated T/H, and 10µA shutdown-making it optimal for industrial edge nodes needing speed, robustness, and low standby power in one µMAX package.

Availability

MAX1062AEUB+T is available at Aetrix Electronics and suitable for motor control feedback loops, industrial thermocouple monitoring, and portable data-acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for MAX1062AEUB+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, automotive, and communications applications.

The MAX1062AEUB+T belongs to Maxim's low-power, high-accuracy SAR ADC product line, engineered specifically for space- and power-constrained data-acquisition systems operating across –40°C to +85°C.

FAQ

What is the guaranteed INL specification for MAX1062AEUB+T over its full operating temperature range?

The MAX1062AEUB+T guarantees ±1 LSB integral nonlinearity (INL) across its specified operating temperature range of –40°C to +85°C, as confirmed in the Ordering Information table and Electrical Characteristics section of the official datasheet. This performance level is specific to the 'A' grade variant (MAX1062AEUB+T), distinguishing it from 'B' (±2 LSB) and 'C' (±3 LSB) grades. The ±1 LSB INL ensures monotonic behavior and <0.006% full-scale linearity error without calibration.

Does MAX1062AEUB+T support true 5V-tolerant digital I/O when DVDD is set to 3.3V?

Yes, the MAX1062AEUB+T supports 5V-tolerant digital inputs (CS, SCLK) even when DVDD is operated at 3.3V, as specified in the Electrical Characteristics table: VIH = 0.7 × DVDD and VIL = 0.3 × DVDD, with absolute maximum ratings allowing up to +6V on digital pins. This enables direct connection to 5V microcontrollers or FPGAs without level-shifting circuitry, while DVDD can remain at 3.3V to match host logic voltage.

How does the MAX1062AEUB+T achieve 10µA shutdown current, and what conditions must be met?

The MAX1062AEUB+T achieves ≤10µA total shutdown current when CS is held high and SCLK is idle, as measured in the Electrical Characteristics table under "Shutdown Supply Current". This ultra-low state requires both AVDD and DVDD to be within their specified ranges (4.75–5.25V and 2.7–5.25V respectively), and no external loading on DOUT. The 10µA figure represents the sum of IAVDD and IDVDD under these conditions, enabling multi-year battery life in intermittent-sampling applications.

What is the minimum acquisition time required for full 14-bit accuracy on MAX1062AEUB+T, and how is it affected by source impedance?

The MAX1062AEUB+T specifies a maximum acquisition time (tACQ) of 1.1µs under nominal conditions (RS < 1kΩ). However, tACQ scales with source impedance per the formula tACQ = 11(RS + RIN) × 35pF, where RIN = 800Ω. For example, a 10kΩ source increases tACQ to ~4.3µs. To maintain 14-bit accuracy, the external driver must settle within this extended window before the sixth SCLK edge, necessitating either low-Z sources or wideband buffering.

Can MAX1062AEUB+T interface directly with a PIC16 microcontroller using hardware SPI, and what configuration is required?

Yes, the MAX1062AEUB+T interfaces directly with PIC16 microcontrollers using hardware SPI. Configuration requires CPOL = 0 and CPHA = 0 (as documented in Applications Information), with CS driven by a GPIO pin. The SSPCON register must be set to SPI master mode (SSPM3:0 = 0001), CKP = 0, and SSPEN = 1. Three consecutive 8-bit reads retrieve the full 14-bit result: first byte = eight zeros, second = D13–D6, third = D5–D0 + S1/S0, all clocked on SCLK falling edges.