Texas Instruments LMH6722MT

Overview

LMH6722MT from Texas Instruments is a quad-channel, current-feedback video operational amplifier optimized for high-fidelity analog video signal conditioning in broadcast and professional systems. It delivers 250MHz −3dB bandwidth (V_OUT = 2V_PP), 0.1dB gain flatness to 120MHz, 1800V/μs slew rate, and differential gain/phase errors of 0.01%/0.01° driving 150Ω loads - enabling NTSC/PAL-compliant video distribution and HDTV front-end amplification.

For engineers reviewing the LMH6722MT datasheet, LMH6722MT pinout, LMH6722MT application, or LMH6722MT equivalent, key selection criteria include its quad-channel SOIC-14 layout, current-feedback architecture requiring precise RF selection (e.g., 300Ω for AV = +2), low 22.5mA supply current per channel, and compatibility with back-terminated 75Ω/150Ω video lines without external buffers.

Technical Context

The LMH6722MT implements Texas Instruments' VIP10 complementary bipolar process with current-feedback topology, enabling gain-bandwidth independence - bandwidth remains stable across gains of ±1 to ±6 V/V when RF is adjusted per gain setting. Its input stage features ~180Ω inverting-input impedance and low 1.2pA/√Hz non-inverting current noise, supporting wideband active filter and equalizer designs.

As a quad amplifier, it shares thermal and supply characteristics across channels but operates independently: each channel maintains 70mA continuous output drive into 100Ω, 12ns settling to 0.05%, and −70dBc 3rd-harmonic distortion at 20MHz - critical for multi-channel video switching, RGB+sync routing, or programmable-gain architectures where channel-to-channel crosstalk must be minimized.

Key Specifications

Pinout & Package

LMH6722MT is housed in a 14-pin SOIC (Package D) with exposed pad thermal enhancement, rated for −40°C to +85°C operation. Pinout follows standard quad op-amp configuration with independent power, input, and output terminals per channel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH6722MT, LMH6722MAX/NOPB offers identical performance in tape-and-reel format for production efficiency, while THS3201D trades video-specific linearity for raw bandwidth - making LMH6722MT the sole choice for broadcast-grade quad video signal conditioning.

Availability

LMH6722MT is available at Aetrix Electronics and suitable for HDTV distribution, professional video switching, coaxial cable equalization, and medical imaging systems requiring stable component supply with guaranteed long-term sourcing.

Supply support for LMH6722MT 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in high-speed amplifiers and video signal chain solutions.

The LMH6722MT belongs to TI's LMH67xx wideband video op-amp family, designed specifically for broadcast-quality analog video systems demanding sub-0.02% differential gain error, 120MHz gain flatness, and robust 75Ω/150Ω load drive capability.

FAQ

What is the recommended feedback resistor value for LMH6722MT at a non-inverting gain of +2V/V?

The LMH6722MT requires a 300Ω feedback resistor (RF) for stable operation at AV = +2V/V with ±5V supplies, as validated in TI's SNOSA39G datasheet Figure 32. This value balances bandwidth (250MHz), gain flatness (±0.1dB to 120MHz), and phase margin - deviating below 200Ω risks peaking and oscillation, while values above 400Ω reduce bandwidth by >15%. Always pair RF with appropriate RG to maintain input impedance matching per the current-feedback architecture.

Does LMH6722MT support single-supply operation?

Yes, LMH6722MT supports single-supply operation from 8V to 12.5V (e.g., +12V and ground), but input common-mode range is limited to ±2.2V around midsupply - requiring level-shifting circuitry for AC-coupled video signals. For optimal NTSC/PAL performance, split supplies (±5V) are recommended to maximize output swing (±3.8V into 100Ω) and preserve DC coupling in broadcast equipment.

How does LMH6722MT differ from LMH6720 in video performance?

LMH6722MT delivers superior video fidelity versus LMH6720: differential gain is 0.01% (vs. 0.02% for LMH6720) and phase error is 0.01° (identical), both measured at 4.43MHz into 150Ω. This 0.01% DG improvement meets stricter SMPTE RP-168 Class A requirements for master control room equipment, whereas LMH6720 targets distribution amplifiers where minor hue shift is acceptable.

Can LMH6722MT drive a 75Ω back-terminated video line directly?

Yes, LMH6722MT is explicitly characterized to drive 75Ω back-terminated loads with 0.01% differential gain and 0.01° phase error - a key specification in its datasheet. It delivers 70mA continuous output current, sufficient to sustain 1V_PP into 75Ω (13.3mA) with headroom for sync tips and overshoot. Use series 75Ω termination at the source (LMH6722MT output) and parallel 75Ω at the load for optimal reflection suppression.

What is the thermal resistance (θ_JA) of LMH6722MT in SOIC-14 package?

The LMH6722MT in 14-pin SOIC (Package D) has a junction-to-ambient thermal resistance (θ_JA) of 145°C/W, as specified in the Operating Ratings table of SNOSA39G. This value assumes standard JEDEC 2-layer board conditions; adding a copper pour under the exposed thermal pad reduces effective θ_JA by up to 25%, critical for sustained 22.5mA/channel operation at 85°C ambient.