Analog Devices Inc./Maxim Integrated MAX4189ESD

Overview

The MAX4189ESD from Maxim Integrated is a triple, current-feedback video amplifier optimized for closed-loop gains ≥+1V/V (0dB), delivering 250MHz -3dB bandwidth, 0.1dB gain flatness to 30MHz, and differential gain/phase errors of 0.07%/0.02° in NTSC video signals. It operates from ±2.25V to ±5.5V dual supplies or +5V single supply, consumes only 1.5mA per amplifier, and supports high-speed enable/disable (120ns/40ns) with 45mV_p-p switching transient-ideal for RGB distribution amplifiers and HD surveillance video routing.

For engineers reviewing the MAX4189ESD datasheet, MAX4189ESD pinout, MAX4189ESD application, or MAX4189ESD equivalent, key selection criteria include its triple-channel architecture, 250MHz small-signal bandwidth at AV≥+1V/V, low-glitch disable mode (450µA per amp), 16-pin QSOP package, and verified performance in multiplexed video signal paths requiring fast settling (28ns to 0.1%) and high off-isolation (–55dB).

Technical Context

The MAX4189ESD implements a current-feedback topology with high-impedance inverting input and low-impedance noninverting input, enabling wide bandwidth independent of closed-loop gain. Its disable control isolates inputs, places outputs in high-Z, and reduces supply current to 450µA per amplifier without compromising channel-to-channel isolation.

Each of the three amplifiers features independent DISABLE pins (DISABLE1–DISABLE3), allowing selective channel shutdown. The device maintains 0.1dB gain flatness up to 30MHz under dual-supply conditions and achieves 22ns to 0.1% settling time with 350V/µs slew rate (positive) and 150V/µs (negative) at AV = +1V/V into 150Ω load.

Key Specifications

Pinout & Package

The MAX4189ESD is housed in a 16-pin QSOP (Quad Small Outline Package) with 1.27mm pitch, measuring 5.0mm × 10.0mm × 1.4mm, suitable for high-density PCB layouts in video interface modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4188ESD+ and THS3201DGN, the MAX4189ESD uniquely balances triple-channel integration, unity-gain bandwidth (250MHz), broadcast-grade video linearity (0.07%/0.02°), and ultra-low switching transients (45mV_p-p)-making it the only drop-in solution for RGB distribution and HD video multiplexing where gain flexibility, channel matching, and visual artifact suppression are mandatory.

Availability

MAX4189ESD is available at Aetrix Electronics and suitable for HD surveillance video routers, RGB distribution amplifiers, and portable medical imaging displays requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX4189ESD 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 industrial, communications, and consumer applications.

The MAX4188/MAX4189/MAX4190 family was designed specifically for high-fidelity, low-glitch video signal routing and distribution-addressing the need for fast-switching, multi-channel amplifiers that maintain broadcast-grade differential gain/phase accuracy under real-world loading conditions.

FAQ

What is the maximum operating temperature range for the MAX4189ESD?

The MAX4189ESD is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in HD surveillance enclosures, medical imaging carts, and professional camera housings exposed to variable thermal environments. The device's supply current remains stable across this range, with typical quiescent current varying only ±0.1mA from –40°C to +85°C per amplifier.

Does the MAX4189ESD support single-supply operation, and what are the voltage requirements?

Yes, the MAX4189ESD supports single-supply operation with VCC = +5V and VEE tied to ground. Input common-mode range extends from 1.5V to 3.5V, and output swing reaches 1.4V to 3.6V into 1kΩ. For optimal NTSC video performance, use AC-coupled inputs with 2.5V bias and RL referenced to VCC/2. The MAX4189ESD maintains 230MHz bandwidth and 0.17% DG error under these conditions.

How does the disable function work on the MAX4189ESD, and what happens to the output state?

Each amplifier in the MAX4189ESD has a dedicated DISABLE pin (DISABLE1–DISABLE3). When pulled ≤(VCC – 3V), the corresponding amplifier disables: inputs are isolated, output enters high-impedance state, and supply current drops to 450µA. Outputs do not float-they are actively tri-stated with <5µA leakage. This allows safe insertion into live video buses without signal contention or DC offset injection.

What is the recommended feedback network for achieving +1V/V gain with the MAX4189ESD?

For +1V/V closed-loop gain, configure the MAX4189ESD in unity-gain buffer mode: connect IN– directly to OUT, and apply signal to IN+. No external resistors are needed. If gain-setting resistors are used (e.g., for impedance matching), set RF = 1600Ω and RG = open (infinite) for RL = 1kΩ, or RF = 1100Ω and RG = open for RL = 150Ω-per the datasheet's dual-supply AC characterization conditions.

Can the MAX4189ESD drive 75Ω video lines directly, and what is the expected performance?

Yes, the MAX4189ESD can drive 75Ω video lines directly. With RL = 75Ω, it delivers 250MHz bandwidth (–3dB), 0.1dB flatness to 25MHz, and differential gain/phase of 0.18%/0.66° (NTSC). Output swing is reduced to ±1.2V, but sufficient for standard video levels. Use series 75Ω termination at the source and avoid stubs longer than 2 inches to maintain signal integrity.