Analog Devices Inc./Maxim Integrated MAX2067ETL+T

Overview

MAX2067ETL+T from Maxim Integrated is a monolithic SiGe BiCMOS analog/digital variable-gain amplifier (VGA) designed for 50Ω RF systems operating from 50MHz to 1000MHz. It integrates an attenuator and amplifier with independent RF input/output ports, enabling configurable signal chain ordering (amplifier-first for NF optimization or amplifier-last for OIP3 optimization), +21.9dB typical gain, 4dB noise figure at maximum gain, and +43dBm output third-order intercept (OIP3) - making it suitable for base station IF/RF gain stages in LTE, WiMAX, and cable infrastructure.

For engineers reviewing the MAX2067ETL+T datasheet, MAX2067ETL+T pinout, MAX2067ETL+T application, or MAX2067ETL+T equivalent, key selection considerations include its dual-control interface (analog voltage or SPI-compatible 8-bit DAC), adjustable bias via RSET for linearity–current trade-off, guaranteed performance over –40°C to +85°C, and compact 40-pin thin QFN (6mm × 6mm) with exposed pad.

Technical Context

The MAX2067ETL+T implements a two-stage architecture: a programmable analog attenuator followed by a high-linearity driver amplifier, each with dedicated 50Ω RF ports. Its gain control supports both continuous analog voltage (0.25V–2.75V, –12.5dB/V slope) and digital SPI interface driving an on-chip 8-bit DAC (0–255 code range, 0.25V–2.75V output).

It operates from single +5V (HC mode: ICC = 123–146mA) or +3.3V (reduced performance: ICC = 60–82mA) supply, with external RSET resistor enabling bias current adjustment to optimize OIP3 vs. power consumption. Performance is characterized across temperature (–40°C to +85°C) and supply voltage variations, with full AC specs guaranteed under HC mode at +5V.

Key Specifications

Pinout & Package

MAX2067ETL+T is housed in a 40-pin thin QFN package (6mm × 6mm) with exposed thermal pad (EP), optimized for RF performance and thermal dissipation in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar variable-gain amplifier applications.

Compared with MAX2065ETL+, the MAX2067ETL+ trades 2dB OIP3 for lower supply current and simplified biasing; versus ADL5330ACPZ-R7, it offers tighter gain flatness, integrated DAC, and SPI compatibility - making it optimal for cost- and size-constrained telecom infrastructure where 1GHz bandwidth suffices.

Availability

MAX2067ETL+T is available at Aetrix Electronics and suitable for WCDMA base stations, WiMAX CPE, and DOCSIS-compliant CMTS requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for MAX2067ETL+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF solutions for communications, industrial, and automotive markets.

The MAX2067ETL+T belongs to Maxim's high-linearity RF VGA product line, engineered specifically for demanding wireless infrastructure applications requiring wide dynamic range, low distortion, and flexible digital/analog control in compact form factors.

FAQ

What is the primary function of the MAX2067ETL+T in an RF signal chain?

The MAX2067ETL+T functions as a high-linearity, serial/analog-controlled variable-gain amplifier (VGA) that provides precise, wide-range gain adjustment (31dB) for 50Ω RF systems from 50MHz to 1000MHz. Its dual-stage architecture - with separate attenuator and amplifier sections - allows configuration to optimize either noise figure (amplifier-first) or linearity (amplifier-last), making it ideal for receiver and transmitter gain control in base stations and broadband infrastructure. The MAX2067ETL+T integrates an on-chip 8-bit DAC and supports both SPI and analog voltage control.

Can the MAX2067ETL+T operate from a +3.3V supply, and how does performance differ from +5V operation?

Yes, the MAX2067ETL+T supports single +3.3V supply operation with slightly reduced performance: typical gain drops to +21.3dB, OIP3 decreases to +38dBm, and noise figure increases to 4.3dB - all measured at 200MHz in high-current mode. Supply current reduces to 60–82mA. This mode is suitable for power-constrained applications where minor linearity/NF trade-offs are acceptable. Full +5V performance remains available for maximum dynamic range. The MAX2067ETL+T maintains guaranteed operation across –40°C to +85°C in both supply configurations.

How does the RSET pin affect the MAX2067ETL+T's performance and power consumption?

The RSET pin on the MAX2067ETL+T sets the amplifier's quiescent bias current via an external resistor to ground, enabling direct trade-off between linearity and power. A lower RSET value increases current, raising OIP3 (e.g., +43dBm at ~146mA with +5V) but increasing heat; a higher RSET reduces current (e.g., ~72mA), lowering OIP3 by ~1–2dB while cutting power by >30%. This adjustment is fully characterized and supported across temperature - allowing designers to tune the MAX2067ETL+T for specific thermal or efficiency targets without changing layout or firmware.

What is the significance of the MAX2067ETL+T's 0.5dB gain flatness specification?

The 0.5dB gain flatness over any 100MHz bandwidth (e.g., 200–300MHz or 800–900MHz) means the MAX2067ETL+T introduces minimal amplitude variation across wide modulation bandwidths - critical for maintaining signal fidelity in multi-carrier LTE, WCDMA, or OFDM systems. This flatness reduces the need for complex digital pre-distortion or analog equalization downstream, improves EVM consistency across channels, and ensures predictable AGC behavior in wideband receivers. It reflects tight process control and matched internal transistor characteristics within the MAX2067ETL+T's SiGe BiCMOS process.

Does the MAX2067ETL+T support both analog and digital gain control simultaneously, and how are they coordinated?

No - the MAX2067ETL+T supports analog control (via ANALOG_VCTRL pin) or digital control (via SPI-driven on-chip DAC), but not simultaneous use. The VDAC_EN pin enables or disables the DAC path; when disabled, only analog voltage controls gain. When enabled, the DAC output drives the same internal control node, overriding analog input. This design prevents conflict and ensures deterministic behavior: firmware can seamlessly switch between modes (e.g., coarse digital steps + fine analog trim), and the MAX2067ETL+T guarantees monotonic, repeatable gain response in either mode across temperature and supply voltage.