Analog Devices Inc./Maxim Integrated MAX19506ETM+T

Overview

The MAX19506ETM+T from Maxim Integrated is a dual-channel, 8-bit analog-to-digital converter (ADC) delivering 100Msps sampling rate, 49.8dBFS SNR at 70MHz input, 69dBc SFDR, 0.4V–1.4V analog input common-mode range, and operation from 1.8V analog supply. It serves as a high-speed digitizer in RF/IF receiver front-ends for cellular base stations and microwave receivers.

For engineers reviewing the MAX19506ETM+T datasheet, MAX19506ETM+T pinout, MAX19506ETM+T application, or MAX19506ETM+T equivalent, key selection criteria include dual-channel interleaving capability, programmable clock divider modes (DIV1/DIV2/DIV4), selectable CMOS output bus configuration (dual or multiplexed), and support for both differential and single-ended analog/clock inputs.

Technical Context

The MAX19506ETM+T employs a 10-stage fully differential pipelined architecture with 9-cycle data latency, enabling high-speed conversion while maintaining low power. Its internal digital error correction ensures no missing codes and compensates for comparator offsets across all stages.

It supports flexible biasing via programmable common-mode reference (0.45V–1.35V in 0.15V steps) and offers dual supply domains: AVDD (1.8V or 2.5V–3.3V) with integrated self-sensing regulator, and OVDD (1.8V–3.5V) for independent digital output voltage control.

Key Specifications

Pinout & Package

The MAX19506ETM+T is housed in a 7mm × 7mm, 48-pin thin QFN package with exposed pad (EP), optimized for thermal dissipation and high-frequency layout integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 8-bit, high-speed ADC applications.

Compared with MAX19505ETM+ and MAX19507ETM+, the MAX19506ETM+T delivers optimal balance of speed (100Msps), power (57mW/channel), and integration (programmable CMOS termination, clock divider, bit reversal) for mid-tier communications infrastructure where 65Msps is insufficient but 130Msps incurs unnecessary power or timing margin overhead.

Availability

MAX19506ETM+T is available at Aetrix Electronics and suitable for cellular base station receivers, point-to-point microwave receivers, and portable medical ultrasound systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX19506ETM+T 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, mixed-signal, and power management ICs for demanding industrial, communications, and medical applications.

The MAX19506ETM+T belongs to Maxim's high-speed ADC product line, engineered specifically for zero-IF and high-IF sampling in wireless infrastructure and instrumentation where dynamic performance, low power, and flexible digital interfacing are critical.

FAQ

What is the absolute maximum clock frequency supported by the MAX19506ETM+T?

The MAX19506ETM+T supports a maximum clock frequency of 100MHz, as specified in its Absolute Maximum Ratings and Electrical Characteristics tables. Operation above this frequency risks timing violations, increased jitter, and potential data corruption. The device also specifies a minimum clock frequency of 50MHz for guaranteed performance, making it unsuitable for sub-50MHz low-power sampling applications. Always verify clock signal integrity and duty cycle (30–70%) per the timing specifications.

Does the MAX19506ETM+T support single-ended analog input configurations?

Yes, the MAX19506ETM+T supports single-ended analog inputs: tie either INA− or INB− to ground while applying the signal to INA+ or INB+. The input common-mode voltage range remains 0.4V–1.4V, and full-scale differential input voltage is 1.5VP-P. Performance metrics such as SNR and SFDR are characterized under differential conditions but remain usable in single-ended mode with appropriate layout and source impedance matching.

How does the programmable common-mode reference (CMA/CMB) function in the MAX19506ETM+T?

The MAX19506ETM+T allows software-programmed adjustment of CMA and CMB voltages from 0.45V to 1.35V in 0.15V increments via internal registers. This feature enables precise DC bias alignment with driving circuits-such as zero-IF mixers-without external resistive dividers. The default setting is 0.90V, and the voltage is generated using internal 2kΩ resistors referenced to AVDD, reducing component count and improving thermal stability.

Can the MAX19506ETM+T operate with different analog and digital supply voltages?

Yes, the MAX19506ETM+T features independent supply domains: AVDD powers the analog core (1.8V or 2.5V–3.3V via internal regulator) and OVDD powers the digital outputs (1.8V–3.5V). This separation prevents digital switching noise from degrading analog performance. Typical use pairs 1.8V AVDD with 1.8V OVDD for lowest power, or 3.3V AVDD with 2.5V OVDD to drive legacy 2.5V logic interfaces while maintaining analog SNR.

What is the purpose of the DCLKA and DCLKB outputs on the MAX19506ETM+T?

The DCLKA and DCLKB outputs on the MAX19506ETM+T provide synchronized data-strobe clocks aligned to the rising edge of CLK+, with programmable delay. They simplify high-speed interface timing to FPGAs or ASICs by eliminating setup/hold uncertainty in asynchronous capture. Each DCLK corresponds to its respective channel's data bus (D0A–D7A or D0B–D7B), enabling independent clocking for time-interleaved or parallel processing architectures.