Analog Devices Inc./Maxim Integrated MAX1092BCEG

Overview

MAX1092BCEG from Maxim Integrated is a 10-bit successive-approximation analog-to-digital converter (SAR ADC) with integrated +2.5V reference, 4-channel single-ended or 2-channel pseudo-differential analog input multiplexer, byte-wide parallel (8+2) 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, targeting low-power data-acquisition systems in portable medical and industrial monitoring.

For engineers reviewing the MAX1092BCEG datasheet, MAX1092BCEG pinout, MAX1092BCEG application, or MAX1092BCEG equivalent, this page delivers verified electrical specifications, validated timing behavior, confirmed package mapping to 24-pin QSOP, and real-world design implications for sampling rate, power-down current, reference stability, and interface compatibility with 8-bit microcontrollers.

Technical Context

The MAX1092BCEG implements a charge-redistribution SAR architecture with an internal track-and-hold stage offering 6MHz full-power bandwidth and 350kHz full-linear bandwidth. Its conversion cycle requires 13 clock cycles, supporting up to 400ksps sampling with external 7.6MHz clock or fixed 3.6µs conversion time in internal clock mode.

It features dual acquisition modes-internal (auto-timed, ~1µs acquisition) and external (user-controlled aperture)-and supports four software-selectable power-down states, reducing supply current to 2µA in shutdown. The device uses a 10-bit capacitive DAC and includes on-chip logic for channel selection, polarity configuration, and high-byte/low-byte data multiplexing via HBEN.

Key Specifications

Pinout & Package

MAX1092BCEG is housed in a 24-pin QSOP package (5.0mm × 7.5mm body, 0.635mm pitch), optimized for space-constrained PCB layouts in handheld test equipment and embedded sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and AD7892BRZ-1, the MAX1092BCEG uniquely combines 10-bit accuracy, integrated +2.5V reference, VLOGIC voltage flexibility, and 24-pin QSOP packaging - making it optimal for cost-sensitive, space-limited, battery-powered applications requiring moderate performance without external support components.

Availability

MAX1092BCEG is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical devices, and energy metering systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MAX1092BCEG 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 MAX1092BCEG belongs to Maxim's precision data-acquisition ADC family, designed specifically for low-power, space-constrained systems needing integrated reference, flexible digital interfacing, and robust operation across commercial temperature ranges.

FAQ

What is the maximum sampling rate supported by the MAX1092BCEG?

The MAX1092BCEG supports a maximum sampling rate of 400ksps when driven by a 7.6MHz external clock. This rate is achievable in both internal and external acquisition modes, with conversion time fixed at 13 clock cycles. At lower clock frequencies or in internal clock mode (3.6µs conversion), the effective sampling rate decreases proportionally - for example, 100ksps at 760kHz clock. The device maintains specified AC performance (SINAD ≥60dB, SFDR ≥72dB) up to its rated 400ksps limit.

Does the MAX1092BCEG require an external reference voltage?

No, the MAX1092BCEG does not require an external reference voltage because it integrates a precision +2.5V bandgap reference with ±0.5% initial accuracy and ±20ppm/°C temperature coefficient. The REF pin outputs this internal reference, and REFADJ allows fine adjustment (±100mV range) or disabling (by connecting to VDD) when an external reference is preferred. Using the internal reference eliminates two passive components and reduces layout sensitivity in compact designs.

How many analog input channels does the MAX1092BCEG support in single-ended mode?

The MAX1092BCEG supports exactly four analog input channels (CH0–CH3) in single-ended mode, as confirmed by its 24-pin QSOP pinout and functional description. This differs from the pin-compatible MAX1090 (28-pin QSOP), which offers eight single-ended channels. Channel selection is controlled via bits A2–A0 in the software-configurable control byte, and all four channels share the same COM reference node.

What is the purpose of the HBEN pin on the MAX1092BCEG?

The HBEN (High-Byte Enable) pin on the MAX1092BCEG controls multiplexing of the 10-bit conversion result across the 8-bit parallel data bus (D0–D7). When HBEN = 0, D0–D7 output the 8 LSBs; when HBEN = 1, D0/D8 and D1/D9 output the 2 MSBs. This allows full 10-bit reads using standard 8-bit microcontroller interfaces without requiring additional data lines or serial conversion logic.

Can the MAX1092BCEG operate with a 3.3V digital supply?

Yes, the MAX1092BCEG can operate with a 3.3V digital supply applied to the VLOGIC pin, as its specified VLOGIC range is +2.7V to +5.5V. This allows direct interfacing with 3.3V microcontrollers and FPGAs without level shifters. The analog supply (VDD) remains at +5V, and digital outputs (D0–D7, INT) swing between 0V and VLOGIC, ensuring compatible logic thresholds and reduced power dissipation in mixed-voltage systems.