Analog Devices Inc./Maxim Integrated MAX1264AEEG+T

Overview

MAX1264AEEG+T from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (SAR ADC) with integrated +2.5V reference, byte-wide parallel (8+4) interface, and software-configurable 4-channel single-ended or 2-channel pseudo-differential input. It operates from a single +5V analog supply and supports digital logic levels from +2.7V to +5.5V via VLOGIC. Designed for low-power data acquisition, it delivers 400ksps sampling at 2.5mA, with 2µs wake-up from shutdown - ideal for portable patient monitoring and industrial sensor interfaces.

For engineers reviewing the MAX1264AEEG+T datasheet, MAX1264AEEG+T pinout, MAX1264AEEG+T application, or MAX1264AEEG+T equivalent, key selection criteria include its 12-bit ±0.5 LSB INL, internal track-and-hold with 6MHz full-power bandwidth, software-selectable unipolar/bipolar mode, 24-pin QSOP package, and compatibility with microprocessor parallel buses requiring minimal external components.

Technical Context

The MAX1264AEEG+T implements a charge-redistribution SAR architecture with an internal 12-bit capacitive DAC and integrated track-and-hold stage. Its conversion timing is fixed at 13 clock cycles, supporting both internal (6MHz) and external clock modes (100kHz–7.6MHz), with aperture jitter as low as 50ps in external acquisition mode.

It features dual power-down modes: standby (≤10µA) and full shutdown (≤2µA), triggered via control byte bits PD0/PD1. Analog input configuration is fully software-defined through an 8-bit control register that selects channel (CH0–CH3), SGL/DIF mode, UNI/BIP polarity, ACQMOD, and clock source - enabling flexible integration without hardware reconfiguration.

Key Specifications

Pinout & Package

MAX1264AEEG+T is housed in a 24-pin QSOP (Quad Small Outline Package) with 0.154" body width and standard 0.025" lead pitch, optimized for compact PCB layouts in space-constrained instrumentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS7822U and AD7892BRZ-1, MAX1264AEEG+T uniquely combines integrated +2.5V reference, 400ksps parallel interface, and 24-pin QSOP packaging - delivering lowest total solution size and fastest time-to-data for 12-bit embedded acquisition without external support components.

Availability

MAX1264AEEG+T is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical devices, and energy metering subsystems requiring stable component supply across extended temperature ranges (−40°C to +85°C) and long production lifecycles.

Supply support for MAX1264AEEG+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX1262/MAX1264 product line was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing integrated references, flexible input configurations, and microprocessor-compatible interfaces.

FAQ

What is the operating temperature range for MAX1264AEEG+T?

The MAX1264AEEG+T is rated for operation from −40°C to +85°C, as confirmed by its "AEE" grade suffix in the ordering code and validated in the Absolute Maximum Ratings and Electrical Characteristics tables. This extended industrial temperature range ensures reliable performance in demanding environments such as factory automation controllers and outdoor energy monitoring units, where ambient temperatures exceed commercial-grade limits.

Does MAX1264AEEG+T require an external reference voltage?

No, MAX1264AEEG+T does not require an external reference voltage because it integrates a precision +2.5V bandgap reference with ±2ppm/°C temperature coefficient and ±100mV adjustability via REFADJ. The internal reference is enabled by default; an external reference may be used only if REFADJ is tied to VDD and a stable external source is applied to the REF pin - but this is optional, not required.

How many analog input channels does MAX1264AEEG+T support?

MAX1264AEEG+T supports four single-ended analog input channels (CH0–CH3) or two pseudo-differential channel pairs (CH0/CH1 and CH2/CH3), as explicitly defined in the Pin Configurations diagram and Feature list. This is distinct from the MAX1262 variant (8-channel), and the channel count is fixed per device - no hardware modification can increase it beyond four single-ended inputs.

What package type is used for MAX1264AEEG+T?

MAX1264AEEG+T uses a 24-pin QSOP (Quad Small Outline Package) with 0.154" body width, as specified in the Ordering Information table and Pin Configurations diagram. This surface-mount package has gull-wing leads, 0.025" pitch, and is RoHS-compliant - enabling automated assembly and high-density PCB layouts typical in portable instrumentation and industrial modules.

Can MAX1264AEEG+T interface directly with a 3.3V microprocessor?

Yes, MAX1264AEEG+T can interface directly with a 3.3V microprocessor using its VLOGIC pin, which accepts +2.7V to +5.5V digital supply voltage. When VLOGIC = 3.3V, the device guarantees VOH ≥ 2.8V and VOL ≤ 0.4V under load, meeting 3.3V CMOS logic thresholds. No level-shifting circuitry is needed, simplifying interconnect and reducing signal integrity risk.