Analog Devices Inc./Maxim Integrated MAX1418ETN+D

Overview

MAX1418ETN+D from Maxim Integrated is a 15-bit, 65Msps analog-to-digital converter optimized for intermediate-frequency (IF) sampling in multichannel receivers. It delivers -78.2dBFS noise floor, 73.6dB SNR at 70MHz input, and -85dBc two-tone SFDR with 260MHz -1dB full-power analog bandwidth. It operates from 5V analog and 2.5–3.5V digital supplies, targeting cellular base-station transceivers and E911 location receivers.

For engineers reviewing the MAX1418ETN+D datasheet, MAX1418ETN+D pinout, MAX1418ETN+D application, or MAX1418ETN+D equivalent, key selection criteria include IF-band dynamic performance (SFDR1/SFDR2 at 70MHz), differential input compliance (2.56VP-P, self-biased at 4.17V), CMOS-compatible two's-complement parallel outputs, and thermal management via exposed-paddle 56-pin thin QFN package.

Technical Context

The MAX1418ETN+D employs a fully differential track-and-hold amplifier followed by a multistage pipelined ADC core, both optimized for low thermal noise and harmonic distortion in IF-sampling architectures. Its self-biased analog inputs (INP/INN at 4.17V common-mode) and differential clock inputs (CLKP/CLKN at 2.4V common-mode) eliminate external biasing circuitry.

It features a 3-cycle pipeline latency, separate DAV and DOR outputs for precise data capture and overrange detection, and programmable output driver voltage (2.3–3.5V) via DRVCC. The on-chip 2.5V bandgap reference sets a fixed 2.56VP-P full-scale range and is not user-adjustable.

Key Specifications

Pinout & Package

MAX1418ETN+D is housed in a 8mm × 8mm, 56-pin thin QFN package with exposed paddle (EP) for enhanced thermal dissipation (θ_JA = 21°C/W). The EP must be soldered to PCB ground for optimal thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1428ETN+ and AD9246BCPZ-65, the MAX1418ETN+ uniquely balances 15-bit precision, -78.2dBFS noise floor, and 65Msps speed in a thermally robust 56-pin QFN-making it optimal for cost-sensitive, high-sensitivity IF receivers where 80Msps headroom is unnecessary and 14-bit quantization would degrade dynamic range.

Availability

MAX1418ETN+D is available at Aetrix Electronics and suitable for cellular base-station transceivers, wireless local loop (WLL) infrastructure, and E911 location receivers requiring stable component supply across extended industrial temperature ranges (-40°C to +85°C).

Supply support for MAX1418ETN+D 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 automotive applications.

The MAX1418ETN+D belongs to Maxim's high-speed data converter product line, engineered specifically for IF-sampling receiver architectures in wireless infrastructure-emphasizing dynamic performance, thermal stability, and ease of integration in multichannel systems.

FAQ

What is the full-scale input range of the MAX1418ETN+D?

The MAX1418ETN+D has a fully differential analog input range of 2.56V_P-P, with self-biased inputs at 4.17V common-mode voltage. This fixed range is set by the internal 2.5V bandgap reference and cannot be externally adjusted. The input stage presents a nominal 1kΩ differential impedance due to internal 500Ω bias resistors on INP and INN, and requires AC-coupling for optimal dynamic performance.

Does the MAX1418ETN+D support DC-coupled analog inputs?

The MAX1418ETN+D supports DC-coupled inputs via the CM pin, which provides access to the internal 4.17V common-mode bias node. In DC-coupled configurations, the CM pin can be used to construct an external servo loop that maintains precise common-mode alignment. However, AC-coupling is recommended for best dynamic performance, as specified in the Applications Information section of the datasheet.

What is the purpose of the DOR output on the MAX1418ETN+D?

The DOR (Data Overrange) output on the MAX1418ETN+D is a dedicated flag that asserts high whenever the differential analog input exceeds the ±0.64V full-scale range. It operates synchronously with the data outputs and provides sample-accurate overrange detection. This allows real-time monitoring of signal clipping without parsing the 15-bit output code, simplifying receiver AGC and saturation recovery logic.

Can the MAX1418ETN+D interface directly with 1.8V logic systems?

No-the MAX1418ETN+D digital outputs require DRVCC and DVCC to be set between 2.3V and 3.5V, and its VOH is defined as DVCC – 0.5V. Driving 1.8V logic directly would violate the minimum VOH specification. To interface with 1.8V systems, an external level-shifter or buffer with compatible input thresholds (e.g., 1.8V-tolerant LVCMOS) must be used between the MAX1418ETN+D outputs and the target logic.

How is thermal performance managed in the MAX1418ETN+D package?

The MAX1418ETN+D uses a 56-pin thin QFN package with an exposed paddle (EP) designed for low thermal resistance (θ_JA = 21°C/W). For optimal thermal performance, the EP must be soldered to a large, low-impedance PCB ground plane using multiple thermal vias. The datasheet specifies a maximum junction temperature of +150°C and continuous power dissipation of 3809.5mW at +70°C ambient.