Analog Devices Inc./Maxim Integrated MAX1122BEGK

Overview

MAX1122BEGK from Maxim Integrated is a 10-bit, 170Msps analog-to-digital converter optimized for wideband IF sampling up to 500MHz in cellular base-station transceivers. It delivers 57.5dB SNR at 10MHz, 72dBc SFDR at 100MHz, and operates from a single 1.8V supply with 460mW power dissipation at full rate.

For engineers reviewing the MAX1122BEGK datasheet, MAX1122BEGK pinout, MAX1122BEGK application, or MAX1122BEGK equivalent, this page provides verified technical context, LVDS output timing, differential input interface details, clock divider functionality, and industrial-temperature package validation for digital predistortion receiver design.

Technical Context

The MAX1122BEGK employs a fully differential pipelined architecture with on-chip track-and-hold and internal 1.23V bandgap reference. Its analog inputs (INP/INN) are self-biased at 1.4V common-mode voltage and support ±0.3125V differential swing (1.25V_P-P), enabling high linearity across 600MHz full-power bandwidth.

It features LVDS-compatible differential clock inputs (CLKP/CLKN) with internal duty-cycle equalization, selectable divide-by-2 clock division via CLKDIV, and LVDS digital outputs (D0P/N–D9P/N, DCLKP/N, ORP/N) with 9-cycle pipeline latency. Output format (two's complement or offset binary) is controlled by the T/B pin.

Key Specifications

Pinout & Package

MAX1122BEGK is housed in a 68-pin QFN with exposed paddle (EP), thermally and electrically connected to AGND per manufacturer specification. The package supports industrial-temperature operation and requires standard QFN reflow profile.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with MAX1122BEGK, MAX1123BEGK extends sampling capability by 24% with matched interface and layout, while MAX1124BEGK trades 15dB SFDR at 500MHz for 47% higher throughput-making MAX1122BEGK the preferred choice for SNR- and power-sensitive digital predistortion receivers.

Availability

MAX1122BEGK is available at Aetrix Electronics and suitable for cellular infrastructure, cable head-end systems, and radar subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1122BEGK 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) designs precision analog and mixed-signal ICs for demanding communication, industrial, and automotive applications.

The MAX1122BEGK belongs to Maxim's high-speed ADC product line, engineered specifically for wideband IF sampling in wireless infrastructure where dynamic range, low power, and LVDS interoperability are critical.

FAQ

What is the maximum analog input frequency supported by the MAX1122BEGK?

The MAX1122BEGK supports analog input frequencies up to 500MHz while maintaining specified performance, with a full-power analog bandwidth of 600MHz. At 500MHz input, it achieves 56.5dB SNR and 63.5dBc SFDR under typical conditions, making it suitable for direct IF sampling in modern wireless transceivers.

Does the MAX1122BEGK require an external reference voltage?

No-the MAX1122BEGK includes an internal 1.23V bandgap reference and reference-scaling amplifier. REFIO and REFADJ pins allow optional external adjustment, but the device operates fully functional with internal reference enabled by connecting REFADJ to AGND via a 1kΩ resistor.

How does the CLKDIV pin affect timing in the MAX1122BEGK?

When CLKDIV is logic low, the MAX1122BEGK divides the input clock by two for digital output updates-reducing effective clock jitter impact on SNR. When high, outputs update at the full input clock rate. The pin has an internal pulldown resistor, so it defaults to divide-by-2 if left unconnected.

What is the pipeline latency of the MAX1122BEGK, and how is it used in system design?

The MAX1122BEGK has a fixed 9-clock-cycle pipeline latency from sampling event to valid output data. This deterministic delay enables precise timing alignment in closed-loop systems like digital predistortion, where FPGA-based coefficient calculators must synchronize feedback path timing with transmit path delays.

Can the MAX1122BEGK interface directly with Xilinx or Intel FPGAs?

Yes-the MAX1122BEGK's LVDS-compatible D0P/N–D9P/N and DCLKP/N outputs meet ANSI TIA/EIA-644-A LVDS specifications and drive standard FPGA LVDS input banks without level-shifting. Its 9-cycle latency and deterministic timing simplify interface logic in Xilinx Ultrascale+ or Intel Stratix 10 designs.