Analog Devices Inc./Maxim Integrated MAX1092ACEG

Overview

MAX1092ACEG from Maxim Integrated is a 10-bit successive-approximation ADC with 4-channel single-ended / 2-channel pseudo-differential analog input, +2.5V internal reference, byte-wide parallel (8+2) interface, and 400ksps max sampling rate. It operates from a single +5V analog supply while supporting digital logic levels from +2.7V to +5.5V via VLOGIC, making it suitable for battery-powered data-acquisition systems requiring low power and compact layout.

For engineers reviewing the MAX1092ACEG datasheet, MAX1092ACEG pinout, MAX1092ACEG application, or MAX1092ACEG equivalent, key selection considerations include its software-configurable unipolar/bipolar input mode, 2.5mA active current at 400ksps, 2µs wake-up from shutdown, internal track-and-hold with 6MHz full-power bandwidth, and QSOP-24 package compatibility with industrial temperature range (0°C to +70°C).

Technical Context

The MAX1092ACEG implements a charge-redistribution SAR architecture with integrated track-and-hold, supporting both internal and external clock modes (7.6MHz max), and internal/external acquisition control via ACQMOD bit. Its analog front-end allows software-selectable single-ended or pseudo-differential operation with COM-referenced zero-code alignment.

Conversion timing is deterministic: 13 clock cycles per conversion, with aperture delay of 25ns and acquisition time of 3.2µs (typ). The device tri-states INT on CS high and supports high-byte enable (HBEN) for 10-bit result multiplexing across an 8-bit data bus - enabling direct interfacing with legacy 8-bit microprocessors without glue logic.

Key Specifications

Pinout & Package

MAX1092ACEG is housed in a 24-pin QSOP package (5.0mm × 7.5mm body, 0.635mm pitch), optimized for high-density PCB layouts in space-constrained instrumentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1092BCPG, the MAX1092ACEG offers lower cost and tighter INL (±0.5 LSB vs. ±1 LSB) at the expense of temperature range; versus ADS7822U, it delivers +2 bits resolution, 4× channel count, parallel throughput, and integrated reference - but requires larger footprint and higher pin count.

Availability

MAX1092ACEG is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, smart energy metering, and automated test equipment requiring stable component supply and long-term production continuity.

Supply support for MAX1092ACEG 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 MAX1090/MAX1092 family was designed for low-power, space-constrained data-acquisition systems requiring integrated reference, flexible digital interfacing, and software-configurable analog input topologies - targeting battery-operated and embedded instrumentation.

FAQ

What is the operating temperature range for MAX1092ACEG?

The MAX1092ACEG is rated for 0°C to +70°C ambient operation. This commercial-grade temperature specification makes it suitable for indoor industrial controls, portable test gear, and consumer medical devices where enclosure temperature remains within this window. For applications requiring operation below 0°C or above +70°C, the MAX1092BCPG variant (–40°C to +85°C) is the qualified alternative. The MAX1092ACEG datasheet specifies all electrical parameters within this range, including ±0.5 LSB INL and 2.5mA supply current at 400ksps.

Does MAX1092ACEG require an external crystal or clock source?

No, MAX1092ACEG does not require an external crystal. It supports both internal clock mode (enabled by setting D7=1, D6=0 in control byte) and external clock mode (D7=1, D6=1), accepting TTL/CMOS-compatible clock signals from 100kHz to 7.6MHz. In internal clock mode, the CLK pin must be tied to VDD or GND to prevent floating; the internal oscillator delivers consistent 3.6µs conversion time. External clock mode is recommended when low aperture jitter (<50ps) is required, as internal clock mode exhibits up to 200ps jitter.

How does the HBEN pin affect data readout on MAX1092ACEG?

The HBEN pin on MAX1092ACEG controls multiplexing of the 10-bit conversion result across the 8-bit data bus: when HBEN = 1, D0–D7 carry D8 and D9 (MSBs) along with D0–D5; when HBEN = 0, D0–D7 carry D0–D7 (LSBs). This allows full 10-bit readout using two consecutive 8-bit reads - first with HBEN=1 to capture MSBs, then HBEN=0 for LSBs - enabling seamless integration with 8-bit microprocessors without external latch logic. The timing relationship between HBEN state change and RD strobe is defined in Figures 4 and 5 of the MAX1092ACEG datasheet.

Can MAX1092ACEG operate with a 3.3V digital supply?

Yes, MAX1092ACEG can operate with a 3.3V digital supply applied to the VLOGIC pin, which accepts +2.7V to +5.5V. When VLOGIC = 3.3V, the digital outputs (D0–D9, INT) swing between 0V and ~2.8V (VOH ≥ VLOGIC – 0.5V), ensuring compatibility with 3.3V logic families. The analog supply VDD remains at +5V, maintaining full dynamic range and SNR performance. This dual-supply flexibility eliminates level shifters in mixed-voltage systems and is explicitly validated in the MAX1092ACEG electrical characteristics table under "Digital Inputs and Outputs" conditions.

What analog input configurations does MAX1092ACEG support?

MAX1092ACEG supports four analog input configurations via software control: single-ended unipolar (0 to VREF), single-ended bipolar (–VREF/2 to +VREF/2), pseudo-differential unipolar, and pseudo-differential bipolar. In single-ended mode, CH0–CH3 are referenced to COM; in pseudo-differential mode, pairs CH0/CH1 and CH2/CH3 are used, with COM serving as common-mode reference. The configuration is selected using the SGL/DIF and UNI/BIP bits in the 8-bit control byte written to the device. This eliminates external multiplexer or gain-switching components in multi-sensor systems.