Analog Devices Inc./Maxim Integrated MAX9627ATC+

Overview

MAX9627ATC+ from Maxim Integrated is a 2V/V gain, low-noise, low-distortion fully differential amplifier optimized for driving high-speed pipeline ADCs (e.g., MAX19588) in DC–1.35GHz applications. It features 4.3nV/√Hz input voltage noise, -102dBc/-105dBc HD2/HD3 at 10MHz, 1.35GHz small-signal bandwidth, and adjustable output common-mode voltage via VOCM pin - enabling transformerless, AC-coupling-free interface to 12–16-bit ADCs in medical imaging and ATE systems.

For engineers reviewing the MAX9627ATC+ datasheet, MAX9627ATC+ pinout, MAX9627ATC+ application, or MAX9627ATC+ equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in high-frequency signal chain design, and actionable alternative part guidance - all grounded in Maxim's official 19-5569 Rev 1 datasheet and electrical characterization data.

Technical Context

The MAX9627ATC+ employs voltage-feedback architecture with factory-trimmed on-chip gain resistors (RG = 150Ω, RF = 300Ω) to fix differential gain at 2V/V while maximizing bandwidth and distortion performance. Its dual feedback loops - differential (gain-setting) and common-mode (VOCM-controlled) - ensure precise output balance and stable common-mode rejection across temperature.

It supports both single-ended-to-differential and differential-to-differential operation, uses internal 64Ω termination resistors (RT+/RT−) for 50Ω source matching, and integrates active shutdown (SHDN) with 25µA quiescent current - all in a thermally enhanced 12-pin 3mm × 3mm TQFN-EP package rated for -40°C to +125°C operation.

Key Specifications

Pinout & Package

MAX9627ATC+ is housed in a 12-pin, 3mm × 3mm TQFN-EP package with exposed pad (EP) connected to VEE for thermal and electrical integrity. Pin numbering follows standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fully differential amplifier applications.

Compared with THS4561IRGET and ADA4940-2ACPZ-R7, the MAX9627ATC+ trades minor noise and bandwidth margin for superior integration - including factory-set 2V/V gain, built-in 64Ω terminations, and VOCM-based common-mode control - reducing component count and layout risk in production ADC interface designs.

Availability

MAX9627ATC+ is available at Aetrix Electronics and suitable for communication infrastructure, medical ultrasound imaging, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed performance across industrial temperature ranges.

Supply support for MAX9627ATC+ 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 power management ICs for demanding signal chain and power applications.

The MAX9626/MAX9627/MAX9628 family was designed specifically as ultra-low-noise, low-distortion fully differential amplifiers to replace discrete op-amp + transformer solutions in high-speed ADC driver applications - targeting 12–16-bit pipeline converters operating up to 1.35GHz.

FAQ

What is the exact gain setting and tolerance of the MAX9627ATC+?

The MAX9627ATC+ has a factory-set differential voltage gain of exactly 2V/V, with a guaranteed gain error of ±0.2% over the full -40°C to +125°C operating temperature range. This is achieved using laser-trimmed on-chip resistors (RG = 150Ω, RF = 300Ω), eliminating the need for external gain components and ensuring consistent performance without calibration.

Does the MAX9627ATC+ support single-supply operation with ground-referenced inputs?

Yes, the MAX9627ATC+ supports true single-supply operation with VEE = GND and accepts input common-mode voltages down to -0.75V (guaranteed), enabling direct interfacing to ground-referenced sources like DAC outputs or sensors without negative supply rails - a key advantage over many competing differential amplifiers.

How does the VOCM pin function in the MAX9627ATC+ and what voltage range is valid?

The VOCM pin in the MAX9627ATC+ directly controls the output common-mode voltage, setting both OUT+ and OUT- DC offsets to match the applied VOCM voltage. It accepts 1.1V to (VCC – 1.1V) - e.g., 1.1V to 4.15V at VCC = 5.25V - and maintains >52dB VOCM rejection ratio, allowing precise alignment with ADC reference voltages without external level-shifting circuitry.

What are the thermal characteristics and PCB layout recommendations for the MAX9627ATC+?

The MAX9627ATC+ uses a 3mm × 3mm TQFN-EP package with an exposed pad electrically and thermally connected to VEE. For optimal thermal performance, the EP must be soldered to a minimum 120mm² copper pour tied to the VEE plane. Thermal resistance is typically 60°C/W (θJA); derating begins above +70°C ambient, with full 1333mW dissipation rated at TA ≤ +70°C.

Can the MAX9627ATC+ drive a 50Ω differential load directly, and what is its output drive capability?

Yes, the MAX9627ATC+ is specified to drive a 500Ω differential load (250Ω per side), but it can reliably drive 50Ω differential loads with proper termination and layout. Its output stage delivers ±100mA sink/source current and maintains >77dB output balance error at 10MHz - however, for 50Ω loads, external series resistors (e.g., 43Ω) are recommended to maintain stability and minimize peaking per Maxim's application guidance.