Analog Devices Inc./Maxim Integrated MAX1064AEEG+

Overview

MAX1064AEEG+ from Maxim Integrated is a 10-bit, 400ksps successive-approximation analog-to-digital converter (ADC) with integrated +2.5V reference, byte-wide parallel (8+2) interface, and software-configurable unipolar/bipolar pseudo-differential operation across four single-ended analog input channels. It operates from a single +5V analog supply while supporting digital logic levels from +2.7V to +5.5V via VLOGIC, enabling direct interfacing with mixed-voltage microcontrollers in portable data-acquisition systems.

For engineers reviewing the MAX1064AEEG+ datasheet, MAX1064AEEG+ pinout, MAX1064AEEG+ application, or MAX1064AEEG+ equivalent, key selection considerations include its 24-pin QSOP package, ±0.5 LSB INL at -40°C to +85°C, 2.5mA active current at 400ksps, internal 6MHz full-power bandwidth track/hold, and software-selectable power-down modes reducing supply current to under 10µA between conversions.

Technical Context

The MAX1064AEEG+ implements a charge-redistribution SAR architecture with an internal track-and-hold stage, supporting both internal and external clock modes (7.6MHz max) and internal/external acquisition control for precise sampling timing. Its analog input multiplexer enables configuration for single-ended (CH0–CH3) or pseudo-differential (CH0/CH1, CH2/CH3) operation, with COM referenced to GND and stable within ±0.5 LSB during conversion.

Control is managed via an 8-bit parallel interface with WR, RD, CS, INT, and HBEN signals; the control byte configures channel selection (A2–A0), unipolar/bipolar mode (UNI/BIP), SGL/DIF mode, acquisition mode (ACQMOD), and power-down states (PD1/PD0). The device features automatic power-down wake-up in 2µs and supports external reference bypassing via REFADJ.

Key Specifications

Pinout & Package

MAX1064AEEG+ is housed in a 24-pin QSOP package (5.3mm × 7.8mm, 0.65mm pitch), optimized for high-density PCB layouts in portable instrumentation and medical devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1064AEEG+, MAX1063AEEG+ offers identical functionality at lower voltage but sacrifices 5V compatibility, while ADS7822U trades parallel simplicity for compactness and serial flexibility-neither is pin-compatible, requiring PCB redesign.

Availability

MAX1064AEEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable patient vital signs logging, and energy meter data acquisition requiring stable component supply across extended temperature ranges (-40°C to +85°C) and long production lifecycles.

Supply support for MAX1064AEEG+ 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 applications.

The MAX1060/MAX1064 family was designed for low-power, space-constrained data-acquisition systems requiring integrated reference, flexible input configuration, and parallel microprocessor interfacing - targeting portable instrumentation and battery-operated sensors.

FAQ

What is the operating temperature range for MAX1064AEEG+?

The MAX1064AEEG+ is rated for operation from -40°C to +85°C, as indicated by the "E" grade suffix in its part number. This extended industrial temperature range ensures reliable performance in harsh environments such as factory automation equipment, outdoor energy meters, and portable medical devices exposed to ambient thermal cycling. All specified electrical characteristics-including ±0.5 LSB INL and 400ksps sampling rate-are guaranteed across this full range.

Does MAX1064AEEG+ require an external clock to operate?

No, MAX1064AEEG+ supports both internal and external clock modes. When configured for internal clock mode (D7=1, D6=0 in control byte), it generates its own 7.6MHz clock internally-eliminating the need for an external oscillator. The CLK pin must then be tied to either VDD or GND to prevent floating. External clock mode (D7=D6=1) accepts 100kHz–7.6MHz TTL/CMOS signals for applications demanding precise timing control or synchronization with system clocks.

How does the HBEN pin function in MAX1064AEEG+?

The HBEN (High Byte Enable) pin on MAX1064AEEG+ controls multiplexing of the 10-bit conversion result onto the 8-bit data bus (D7–D0). When HBEN = 1, D7–D0 carry the two most significant bits (D9, D8); when HBEN = 0, they carry the eight least significant bits (D7–D0). This allows full 10-bit resolution to be read in two consecutive 8-bit cycles-essential for interfacing with 8-bit microcontrollers without requiring additional data lines or external latches.

Can MAX1064AEEG+ interface directly with a 3.3V microcontroller?

Yes, MAX1064AEEG+ supports direct interfacing with 3.3V microcontrollers via its independent VLOGIC supply pin, which accepts +2.7V to +5.5V. When VLOGIC = 3.3V, all digital outputs (D7–D0, INT, RD, WR, CS) are compatible with 3.3V logic thresholds (VIH = 2.0V min, VOL = 0.4V max), and inputs tolerate 3.3V levels. No level-shifting circuitry is required, simplifying design and reducing component count in mixed-voltage systems.

What analog input configurations does MAX1064AEEG+ support?

MAX1064AEEG+ supports two software-configurable analog input modes via its control byte: single-ended (four channels: CH0–CH3 referenced to COM) and pseudo-differential (two pairs: CH0/CH1 and CH2/CH3). In pseudo-differential mode, only the positive input (IN+) is sampled, while the negative input (IN-) must remain stable to ±0.5 LSB-enabling noise rejection in noisy environments without full differential amplifier complexity. Unipolar (0V to VREF) and bipolar (±VREF/2) ranges are selectable per conversion.