Analog Devices Inc./Maxim Integrated MAX12555ETL+

Overview

The MAX12555ETL+ from Maxim Integrated is a 14-bit, 95Msps analog-to-digital converter optimized for IF sampling applications, featuring a fully differential track-and-hold input stage, 72dB SNR at 175MHz input frequency, ±0.35V to ±1.10V adjustable full-scale input range, and single 3.3V analog supply operation. It delivers high dynamic performance in communication receivers and medical imaging systems.

For engineers reviewing the MAX12555ETL+ datasheet, MAX12555ETL+ pinout, MAX12555ETL+ application, or MAX12555ETL+ equivalent, this page provides verified technical context, real-world interface design meaning, confirmed package mapping, and validated alternative selection guidance for high-speed data acquisition designs.

Technical Context

The MAX12555ETL+ employs a 10-stage fully differential pipelined ADC architecture with 8.0 clock-cycle latency and digital error correction to eliminate missing codes. Its switched-capacitor track-and-hold supports analog inputs up to 175MHz while maintaining 72dB SNR and 76.2dBc SFDR at that frequency.

It integrates a duty-cycle equalizer (DCE) to compensate wide clock duty-cycle variations, accepts single-ended or differential clock inputs via CLKTYP configuration, and provides dual-reference modes-internal 2.048V bandgap or buffered/unbuffered external reference-with common-mode voltage output (COM) for simplified differential analog circuit design.

Key Specifications

Pinout & Package

Package: 40-pin thin QFN (6mm × 6mm × 0.8mm) with exposed paddle (EP), lead-free (RoHS-compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX12554ETL+, the MAX12555ETL+ delivers 3Msps higher throughput and +3dB SNR at IF frequencies, while MAX19538ETL+ trades 2 bits of resolution for +3.8dB SFDR - making each optimal for distinct signal integrity priorities in RF front-ends.

Availability

The MAX12555ETL+ is available at Aetrix Electronics and suitable for cellular infrastructure, medical imaging systems, and portable test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX12555ETL+ 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 precision analog, mixed-signal, and high-speed data conversion solutions for demanding industrial and communications applications.

The MAX12555ETL+ belongs to Maxim's high-speed pipeline ADC product line, designed specifically for direct IF sampling in wireless infrastructure, medical imaging, and instrumentation where dynamic performance, low power, and small size are critical.

FAQ

What is the maximum analog input frequency supported by the MAX12555ETL+ while maintaining specified SNR?

The MAX12555ETL+ maintains a typical 72dB SNR up to 175MHz analog input frequency under standard test conditions (fCLK = 95MHz, -0.5dBFS input). Performance remains usable beyond 175MHz - e.g., 71.29dB SNR at 225MHz - though SNR degrades gradually with increasing input frequency due to aperture jitter and bandwidth limitations. The device is characterized for direct IF sampling up to 400MHz.

Does the MAX12555ETL+ support both single-ended and differential analog inputs?

Yes, the MAX12555ETL+ supports both configurations. When used differentially, INP and INN accept complementary signals with common-mode voltage set to VDD/2. For single-ended operation, INN is tied to COM and INP receives the signal - the internal T/H amplifier automatically configures for proper common-mode rejection and gain scaling.

How does the duty-cycle equalizer (DCE) function in the MAX12555ETL+?

The DCE in the MAX12555ETL+ corrects clock duty-cycle distortion internally, allowing reliable operation with input clocks ranging from 40% to 60% duty cycle. When DCE is enabled (DCE pin high), the ADC dynamically adjusts internal timing to maintain consistent sampling aperture width - eliminating the need for external clock cleanup circuits or precision clock generators.

What is the purpose of the DOR (Data Out-of-Range) output on the MAX12555ETL+?

The DOR output on the MAX12555ETL+ is a dedicated digital flag that goes high whenever the analog input exceeds the configured full-scale range (±0.35V to ±1.10V). This hardware-level saturation indicator allows immediate system response - such as AGC adjustment or alarm triggering - without requiring post-processing analysis of the D13–D0 data stream.

Can the MAX12555ETL+ operate with different digital I/O voltage levels?

Yes, the MAX12555ETL+ features a separate OVDD supply pin (1.7V to 3.6V) for its digital outputs, enabling direct interfacing with 1.8V, 2.5V, or 3.3V logic families. Output voltage levels (VOH/VOL) scale with OVDD, and the DAV and DOR signals are fully compatible with the selected OVDD domain - simplifying integration into mixed-voltage FPGA or ASIC systems.