Analog Devices Inc./Maxim Integrated MAX4312GEE+B5C

Overview

MAX4312GEE+B5C from Maxim Integrated is an 8-channel, unity-gain-stable video multiplexer-amplifier with 265MHz -3dB bandwidth, 345V/µs slew rate, and 40ns channel switching time. It operates from a single +4V to +10.5V supply, delivers rail-to-rail output swing into 150Ω, and maintains 0.06% differential gain / 0.08° differential phase error-optimized for broadcast video signal routing.

For engineers reviewing the MAX4312GEE+B5C datasheet, MAX4312GEE+B5C pinout, MAX4312GEE+B5C application, or MAX4312GEE+B5C equivalent, key selection criteria include multichannel video switching transient suppression (10mV_p-p), input common-mode range extending to V_EE, low-power shutdown mode (560µA), and QSOP-16 package compatibility with high-density video interface PCB layouts.

Technical Context

The MAX4312GEE+B5C integrates an 8-input analog multiplexer with a unity-gain-stable voltage-feedback amplifier. Its internal architecture supports closed-loop gains ≥+1V/V via external feedback resistors, enabling flexible gain configuration without sacrificing stability. The device uses a rail-to-rail output stage with only 8Ω open-loop output impedance across full voltage range, minimizing load-dependent gain error.

Channel selection is controlled by three logic inputs (A0–A2), with 40ns switching time and ultra-low 10mV_p-p transient artifacts. Shutdown functionality (SHDN) places outputs in high-impedance state while reducing ICC to 560µA-critical for power-managed video matrix systems requiring dynamic channel enable/disable.

Key Specifications

Pinout & Package

MAX4312GEE+B5C is packaged in a 16-pin QSOP (Quad Small Outline Package) with 0.154" body width and 0.025" lead pitch, optimized for automated assembly and thermal performance in video interface modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar video multiplexer-amplifier applications.

Compared with MAX4312EEE+ and THS4302DR, the MAX4312GEE+B5C uniquely combines 8-channel selection, unity-gain stability, and broadcast-grade video fidelity in a single QSOP-16 package-reducing BOM count by 3 components per channel versus discrete alternatives.

Availability

MAX4312GEE+B5C is available at Aetrix Electronics and suitable for broadcast video routing, medical imaging signal switching, and video crosspoint matrix applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for MAX4312GEE+B5C 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 consumer applications.

The MAX4310–MAX4315 product line was engineered specifically for high-fidelity, multichannel analog video signal routing-addressing broadcast, medical, and professional AV markets where differential gain/phase error, switching transients, and rail-to-rail drive capability are critical.

FAQ

What is the maximum operating supply voltage for MAX4312GEE+B5C?

The MAX4312GEE+B5C supports a single-supply operating range of +4V to +10.5V, with absolute maximum supply voltage rated at 12V. Operation above +10.5V risks permanent damage and violates the specified AC/DC performance envelope defined in the datasheet. For dual-supply use, it accepts ±2V to ±5.25V, maintaining full rail-to-rail output swing and input common-mode range down to the negative rail.

Does MAX4312GEE+B5C support true rail-to-rail input common-mode range?

Yes, the MAX4312GEE+B5C features an input common-mode voltage range that extends to the negative supply rail (VEE), enabling direct interfacing with ground-referenced video sources without level-shifting circuitry. This is confirmed in the DC Electrical Characteristics table under "Input Voltage Range" and validated by typical operating curves showing CMRR >73dB over 0–2.2V common-mode range. The amplifier remains linear and stable within this region.

How does the shutdown function affect output impedance in MAX4312GEE+B5C?

When the SHDN pin is driven low, the MAX4312GEE+B5C places its output in a high-impedance state with a typical disabled output resistance of 35kΩ. This is explicitly documented in the Applications Information section under "Low-Power Shutdown Mode." The high-Z state isolates the output from downstream circuitry, allowing safe paralleling of multiple MAX4312GEE+B5C devices in large video matrices without contention.

Can MAX4312GEE+B5C drive 75Ω coaxial cables directly?

The MAX4312GEE+B5C is not designed for direct 75Ω cable driving in a single-ended configuration. It drives 150Ω split-termination networks (two 75Ω resistors to VCC/2), delivering compliant video levels into back-terminated lines. Driving 75Ω directly would halve the output swing and degrade differential gain/phase performance. Figure 5 in the datasheet confirms the recommended 150Ω termination scheme for optimal broadcast video fidelity.

What is the guaranteed differential phase error specification for MAX4312GEE+B5C?

The MAX4312GEE+B5C guarantees a differential phase error of 0.08° under standard test conditions (RL = 150Ω to VCC/2, AVCL = +1V/V, f = 3.58MHz color subcarrier). This value is explicitly listed in the AC Electrical Characteristics table and is identical across the MAX4310/MAX4311/MAX4312 variants. It meets SMPTE RP-168 requirements for broadcast-quality video signal routing.