Analog Devices Inc./Maxim Integrated MAX1292AEEG

Overview

MAX1292AEEG from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with integrated +2.5V reference, 4-channel single-ended / 2-channel pseudo-differential input multiplexer, byte-wide parallel (8+4) interface, and software-configurable unipolar/bipolar operation. It operates from a single +5V analog supply and supports digital logic levels from +2.7V to +5.5V via VLOGIC, enabling direct interfacing with mixed-voltage microprocessors in portable data-acquisition systems.

For engineers reviewing the MAX1292AEEG datasheet, MAX1292AEEG pinout, MAX1292AEEG application, or MAX1292AEEG equivalent, this page delivers verified electrical specifications, validated 24-pin QSOP package mapping, confirmed timing behavior at 400ksps, and real-world design implications of its internal track-and-hold (6MHz full-power bandwidth), dual power-down modes (<2µA shutdown current), and HBEN-controlled 12-bit data bus multiplexing.

Technical Context

The MAX1292AEEG implements a capacitive charge-redistribution SAR architecture with an on-chip track-and-hold stage offering 6MHz full-power bandwidth and 350kHz full-linear bandwidth. Its control logic accepts an 8-bit configuration byte defining acquisition mode (internal/external), clock source (internal/external), unipolar/bipolar range, and channel selection - with conversion requiring exactly 13 clock cycles.

It features dual power-down states: standby mode (1–2µA) and full power-down (≤2µA), both entered via PD0/PD1 bits in the control byte; wake-up time is 2µs. The parallel interface uses HBEN to toggle between LSB- and MSB-byte access, while INT asserts low upon conversion completion and auto-clears on first RD read or new control byte write.

Key Specifications

Pinout & Package

MAX1292AEEG is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for high-density PCB layouts in portable instrumentation. Pin functions are electrically validated per Maxim's official datasheet Rev 3 (12/02).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1292BEEG, the MAX1292AEEG offers tighter ±0.5 LSB INL for precision measurement, while ADS7822U trades resolution, interface type, and reference integration for minimal footprint - making MAX1292AEEG the sole option supporting high-accuracy, low-power, parallel-interface 12-bit conversion in 24-pin QSOP.

Availability

MAX1292AEEG is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, energy metering subsystems, and touchscreen controller interfaces requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for MAX1292AEEG 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 MAX1290/MAX1292 family was designed for battery-powered and space-constrained data-acquisition systems requiring integrated reference, low quiescent current, and simple parallel interfacing - targeting portable instrumentation and embedded sensor hubs.

FAQ

What is the operating temperature range for MAX1292AEEG?

The MAX1292AEEG is rated for operation from -40°C to +85°C, as confirmed by its "E" grade suffix and ordering information in the official datasheet. This extended temperature range makes MAX1292AEEG suitable for deployment in industrial enclosures, outdoor metering units, and medical devices subject to ambient thermal cycling without derating.

Does MAX1292AEEG require an external clock to operate?

No, MAX1292AEEG does not require an external clock. It supports internal clock mode (selected via control byte bits D7=1, D6=0), where the on-chip oscillator generates the 7.6MHz conversion clock. In this mode, the CLK pin must be tied to VDD or GND to prevent floating - eliminating external crystal or oscillator components for MAX1292AEEG designs.

How does the HBEN pin affect data readout on MAX1292AEEG?

The HBEN pin on MAX1292AEEG controls multiplexing of the 12-bit conversion result onto the 8-bit data bus: when HBEN = 1, D0–D7 carry D8–D11 (MSB byte); when HBEN = 0, D0–D7 carry D0–D7 (LSB byte). This allows 8-bit microprocessors to read the full 12-bit result in two consecutive cycles - a key design feature of MAX1292AEEG's parallel interface.

Can MAX1292AEEG interface directly with a 3.3V microcontroller?

Yes, MAX1292AEEG can interface directly with a 3.3V microcontroller via its VLOGIC pin, which accepts +2.7V to +5.5V digital supply voltage. When VLOGIC = 3.3V, MAX1292AEEG's D0–D7 and INT outputs are 3.3V-compatible, and inputs (RD, WR, CS, HBEN) recognize 3.3V logic thresholds - enabling seamless integration without level-shifting circuitry for MAX1292AEEG.

What is the maximum analog input voltage range for MAX1292AEEG in unipolar mode?

In unipolar mode, MAX1292AEEG accepts analog input voltages from 0V to VREF (typically +2.5V), as specified in the Electrical Characteristics table. With the internal reference enabled, this corresponds to a 0V to +2.5V input range referenced to COM; exceeding +2.5V or going below 0V risks code saturation or erroneous conversion results for MAX1292AEEG.