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Texas Instruments LMH6720MFX/NOPB
- Part No.:
- LMH6720MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- SOT-23-6
- Datasheet:
-
LMH6720MFX/NOPB.pdf
- Description:
- IC AMP CURRENT FEEDBACK SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMH6720MFX/NOPB from Texas Instruments is a single-channel, current-feedback video operational amplifier with TTL-compatible shutdown control, 400MHz small-signal bandwidth (AV = +2V/V, VOUT = 500mVPP), 1800V/μs slew rate, and 0.02% differential gain error at 4.43MHz driving 150Ω - optimized for HDTV, NTSC/PAL video distribution and high-speed multiplexing.
For engineers reviewing the LMH6720MFX/NOPB datasheet, LMH6720MFX/NOPB pinout, LMH6720MFX/NOPB application, or LMH6720MFX/NOPB equivalent, key selection criteria include shutdown timing (11ns turn-on / 7ns turn-off), low 500μA shutdown current, 6-pin SOT-23 thermal resistance (198°C/W), and current-feedback architecture requiring precise RF selection (e.g., 300Ω for AV = +2).
Technical Context
The LMH6720MFX/NOPB uses TI's VIP10 complementary bipolar process with current-feedback topology to achieve wideband performance while maintaining stability across gains of ±1 to ±6V/V. Its input buffer features ~180Ω inverting-input impedance, and closed-loop operation requires external feedback resistor tuning - not fixed-gain configuration.
Unlike voltage-feedback op amps, the LMH6720MFX/NOPB's bandwidth remains largely independent of closed-loop gain when RF is properly selected; however, gain flatness degrades above ±5V/V due to RG limitations and input buffer output resistance constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 400MHz at 500mVPP output (enables full HD baseband video signal amplification without attenuation) |
| Slew Rate | 1800V/μs (supports fast transient response for composite sync pulses and digital video edges) |
| Differential Gain Error | 0.02% at 4.43MHz into 150Ω (meets broadcast-grade NTSC video fidelity requirements) |
| Shutdown Current | 500μA (reduces system power by >90% during inactive periods in portable or multi-channel systems) |
| Turn-on Time | 11ns (enables sub-frame switching in video routing applications with minimal glitching) |
| Supply Current | 5.6mA typical at ±5V (balances speed and power efficiency for continuous video signal paths) |
| Harmonic Distortion | −58dBc HD2 / −70dBc HD3 at 20MHz (preserves signal integrity in wideband active filters and cable drivers) |
Pinout & Package
LMH6720MFX/NOPB is housed in a 6-pin SOT-23 (DBV) package with exposed pad for thermal enhancement and standard JEDEC-compliant footprint. Pin 1 is marked via laser scribe; device orientation follows TI DBV outline drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V−) | Negative supply rail | Accepts −5V to −6.25V; must be decoupled locally to minimize ground bounce in high-speed operation |
| 2 (+IN) | Non-inverting input | High-impedance node (2MΩ); sensitive to layout parasitics - requires guard ring and minimized trace length |
| 3 (−IN) | Inverting input | Low-impedance node (~180Ω); dictates feedback network design and stability via RF selection |
| 4 (OUTPUT) | Amplifier output | Capable of 70mA continuous drive into 100Ω; supports back-terminated 75Ω video loads |
| 5 (V+) | Positive supply rail | Accepts +5V to +6.25V; bypassing with 0.1μF ceramic + bulk capacitor is mandatory |
| 6 (SD) | Shutdown control | TTL-compatible logic input: <0.8V disables (high-Z I/O), >2.0V enables; no pull-up required |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible shutdown pin | Enables fast, low-power multiplexing of multiple video channels onto shared transmission lines without external level shifters |
| Current-feedback architecture | Delivers stable 400MHz bandwidth across gains +1 to +6V/V when RF is tuned per TI's recommended values (e.g., 300Ω @ AV=+2) |
| 0.1dB gain flatness to 120MHz | Ensures uniform amplitude response across entire NTSC/PAL luminance and chrominance bands |
| 1800V/μs slew rate | Prevents edge rounding on 1080p/60 video transitions and preserves rise/fall symmetry in pulse signals |
| Low 0.02% differential gain error | Meets SMPTE RP 168 specification for analog video distribution equipment used in broadcast infrastructure |
Applications
| HDTV Video Distribution | Video Multiplexer Switching |
|---|---|
Use Scenario: Amplifying and distributing 1080i/1080p component video signals across multiple monitors in broadcast control rooms. IC Role / Device Role / Timing Role: Single-ended video driver with back-termination capability and 75Ω output matching. Use Value: Maintains 0.02% differential gain and 0.01° phase error at 4.43MHz, preserving color fidelity over long coaxial runs. | Use Scenario: Selecting one of eight video sources for display using TTL-controlled analog switches in professional AV matrix systems. IC Role / Device Role / Timing Role: High-speed analog switch element with 11ns enable/disable timing and high off-isolation (>60dB at 10MHz). Use Value: Enables frame-accurate source switching without visible artifacts or ghosting due to fast settling (12ns to 0.05%) and low crosstalk. |
| Programmable Gain Amplifier | Cable Equalization Driver |
Use Scenario: Digitally adjusting video signal amplitude in real time for automatic level control in medical imaging or test equipment. IC Role / Device Role / Timing Role: Core gain stage in digitally controlled PGA architecture with discrete resistor networks per gain code. Use Value: Supports arbitrary gain settings from +1V/V to +6V/V with <0.1dB flatness up to 120MHz using 1% precision resistors. | Use Scenario: Compensating for high-frequency loss in 150m coaxial video cables used in security camera systems. IC Role / Device Role / Timing Role: Active equalizer stage with peaking RC network in feedback loop to invert cable roll-off. Use Value: Restores 100MHz signal amplitude within ±0.5dB using TI-recommended R/C values (e.g., R1=450Ω, C1=470pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6714MFX/NOPB | No shutdown pin; 5-pin SOT-23; 0.01% DG/DP (slightly better video fidelity) | Fixed-gain video driver where power gating is unnecessary | Select when lowest distortion is critical and shutdown functionality is not required |
| LMH6722MAX/NOPB | Quad-channel SOIC-14; higher 22.5mA supply current; no shutdown per channel | Multi-channel video processing (e.g., RGB+sync amplification) in space-constrained PCBs | Select when consolidating four video paths reduces board area and interconnect complexity |
Compared with LMH6714MFX/NOPB and LMH6722MAX/NOPB, the LMH6720MFX/NOPB uniquely balances single-channel speed, low-power shutdown, and compact 6-pin SOT-23 packaging - making it optimal for scalable, power-aware video routing nodes rather than fixed-driver or multi-channel integration roles.
Availability
LMH6720MFX/NOPB is available at Aetrix Electronics and suitable for HDTV distribution, broadcast-quality video switching, and programmable gain amplifier designs requiring stable component supply, consistent parametric performance, and long-term production support.
Supply support for LMH6720MFX/NOPB 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 conditioning.
The LMH6720MFX/NOPB belongs to TI's LMH67xx wideband video op amp family, designed specifically for broadcast infrastructure, professional AV equipment, and high-fidelity analog video signal chains demanding low distortion, fast settling, and robust drive capability.
FAQ
What is the recommended feedback resistor value for LMH6720MFX/NOPB at a gain of +2V/V?
The LMH6720MFX/NOPB requires a 300Ω feedback resistor (RF) for optimal bandwidth, gain flatness, and stability at AV = +2V/V with ±5V supplies. This value is validated in TI's SNOSA39G datasheet Figure 31 and Application Note OA-13. Using lower RF (e.g., 147Ω) causes peaking; higher RF (e.g., 400Ω) rolls off bandwidth. The LMH6720MFX/NOPB's current-feedback architecture makes RF selection critical - unlike voltage-feedback op amps.
Does LMH6720MFX/NOPB support single-supply operation?
Yes, the LMH6720MFX/NOPB operates from a single +8V to +12.5V supply (or ±4V to ±6.25V dual supplies). When using single supply, the shutdown pin (SD) must remain between 0V and VCC/2–1V per Absolute Maximum Ratings; applying SD < VCC/2 may damage the internal disable circuit. Input common-mode range extends to ±VCC, and output swings to ±3.4V into 100Ω with ±5V rails - confirming rail-to-rail output capability under proper biasing.
How does the shutdown function affect output impedance in LMH6720MFX/NOPB?
When disabled, the LMH6720MFX/NOPB places its input and output terminals in high-impedance state (>1MΩ), but effective off-isolation depends on external feedback components. In inverting configurations, RF and RG dominate output impedance during shutdown - not the IC itself. TI specifies IOZ = 0.2–1.8MΩ for the shutdown output terminal, and recommends minimizing RF/RG values to improve isolation. The LMH6720MFX/NOPB's 7ns shutdown time ensures rapid transition without signal coupling.
Can LMH6720MFX/NOPB drive a 75Ω back-terminated video load?
Yes, the LMH6720MFX/NOPB is explicitly characterized for 75Ω back-terminated video loads in TI's SNOSA39G datasheet, delivering 0.02% differential gain and 0.01° differential phase error at 4.43MHz. It provides 70mA continuous output current and maintains 0.1dB gain flatness to 120MHz into 150Ω (equivalent to two parallel 75Ω loads). For direct 75Ω termination, configure as unity-gain buffer with 600Ω feedback resistor per TI's buffer configuration guidance.
What is the thermal resistance (θJA) of LMH6720MFX/NOPB in its SOT-23 package?
The LMH6720MFX/NOPB in 6-pin SOT-23 (DBV) package has a thermal resistance θJA of 198°C/W, as specified in the Operating Ratings table of SNOSA39G. This value assumes standard JEDEC 2-layer board conditions. With 5.6mA quiescent current at ±5V, power dissipation is ~56mW; at maximum ambient temperature (85°C), junction temperature reaches ~185°C - below the 150°C absolute max limit only if board-level thermal management (e.g., copper pour, thermal vias) reduces effective θJA. Derating is required for sustained high-output-current operation.
LMH6720MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- VIP10™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Current Feedback
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- 400 MHz
- Slew Rate:
- 1800V/µs
- Current - Supply:
- 5.6 mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply, Single/Dual (±):
- 8V ~ 12.5V, ±4V ~ 6.25V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
LMH6720MFX/NOPB FAQ
1.How can I place an order for LMH6720MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6720MFX/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMH6720MFX/NOPB reliable?
The price and inventory of LMH6720MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6720MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6720MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6720MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6720MFX/NOPB?
LMH6720MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6720MFX/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMH6720MFX/NOPB?
For technical support, including LMH6720MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6720MFX/NOPB requirements.
6.How does Aetrix verify that LMH6720MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6720MFX/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMH6720MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6720MFX/NOPB?
All LMH6720MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6720MFX/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMH6720MFX/NOPB part is unused and in its original packaging.
Return procedure for LMH6720MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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