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Texas Instruments LMH6720MF
- Part No.:
- LMH6720MF
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- SOT-23-6
- Datasheet:
-
LMH6720MF.pdf
- Description:
- IC AMP CURRENT FEEDBACK SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,179
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Product details
Overview
LMH6720MF from Texas Instruments is a single-channel, current-feedback video operational amplifier with TTL-compatible shutdown control, 400MHz small-signal bandwidth (AV = +2, VOUT = 500mVPP), 1800V/μs slew rate, and 0.02% differential gain error at 4.43MHz for NTSC video signals. It operates from ±4V to ±6.25V supplies and drives 75Ω back-terminated video loads.
For engineers reviewing the LMH6720MF datasheet, LMH6720MF pinout, LMH6720MF application, or LMH6720MF equivalent, key selection criteria include shutdown timing (11ns turn-on / 7ns turn-off), low 5.6mA quiescent current, high output drive (70mA), and SOT-23-6 package suitability for space-constrained video routing and multiplexing systems.
Technical Context
The LMH6720MF uses Texas Instruments' VIP10 high-speed complementary bipolar process with current-feedback topology, enabling gain-independent bandwidth optimization via external feedback resistor tuning (e.g., 300Ω for AV = +2). Its input buffer features ~180Ω inverting-input impedance and supports stable operation from AV = ±1 to ±6 V/V.
Shutdown functionality places inputs and output into high-impedance state (>1MΩ), reducing supply current to 500μA while maintaining fast switching (11ns on, 7ns off). The device is unity-gain stable and optimized for driving capacitive video loads with minimal differential gain/phase distortion.
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 - meets broadcast-grade NTSC video fidelity requirements |
| Supply Current | 5.6mA (active), 500μA (shutdown) - enables power-gated video signal paths in portable systems |
| Turn-on / Turn-off Time | 11ns / 7ns - allows sub-20ns channel switching in high-speed analog multiplexers |
| Output Drive | 70mA continuous - sustains 2VPP into 75Ω load with <0.1dB gain flatness to 120MHz |
| Harmonic Distortion | −58dBc HD2 / −70dBc HD3 at 20MHz - preserves signal integrity in wideband active filters |
Pinout & Package
LMH6720MF is housed in a 6-pin SOT-23 (DBV) package with exposed thermal pad (not electrically connected), optimized for high-frequency layout with short trace lengths and minimized parasitic capacitance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive supply rail | Accepts +4V to +6.25V; requires local 0.1μF ceramic bypass capacitor |
| 2 - IN− | Inverting input | Current-feedback node with ~180Ω impedance; sensitive to stray capacitance |
| 3 - IN+ | Non-inverting input | High-impedance voltage node (2MΩ); referenced to ground or common-mode bias |
| 4 - V− | Negative supply rail | Accepts −4V to −6.25V; requires symmetric bypassing to V+ |
| 5 - OUTPUT | Amplifier output | Capable of 70mA drive into 75Ω; must be back-terminated for video applications |
| 6 - SD | Shutdown control | TTL-compatible: <0.8V = disable (high-Z), >2.0V = enable; draws ≤20μA when active |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible shutdown pin | Enables fast, logic-level-controlled channel gating without external level shifters |
| 0.02% differential gain error | Preserves color fidelity in NTSC video distribution over coaxial cable |
| 1800V/μs slew rate | Accurately reproduces sharp video transitions and sync pulses without edge rounding |
| Unity-gain stable | Supports buffer (AV = +1) configuration with 600Ω feedback resistor for minimal phase shift |
| Low 5.6mA supply current | Reduces thermal load in multi-channel video processing modules |
| 400MHz small-signal bandwidth | Handles baseband bandwidth of 1080p60 RGB or YUV video signals |
Applications
| HDTV Video Distribution | Video Multiplexer |
|---|---|
Use Scenario: Routing multiple HDMI or component video sources to a single display or recording system using analog switching. IC Role / Device Role / Timing Role: High-speed analog switch element with shutdown-controlled channel isolation. Use Value: 7ns shutdown time ensures minimal crosstalk between active/inactive channels during switching transients. |
Use Scenario: Selecting one of several camera feeds in broadcast production switchers. IC Role / Device Role / Timing Role: Channel buffer with TTL-gated enable for synchronized source selection. Use Value: 11ns turn-on time supports frame-accurate switching within vertical blanking intervals. |
| Programmable Gain Amplifier | Cable Equalization Driver |
Use Scenario: Digitally adjusting video signal amplitude across multiple gain settings in medical imaging equipment. IC Role / Device Role / Timing Role: Core gain stage in digitally controlled PGA architecture with discrete resistor networks. Use Value: Stable performance across AV = +1 to +6 V/V enables precise 1dB step gain control with 1% resistors. |
Use Scenario: Compensating high-frequency loss in long-run coaxial video cables (e.g., 150m CCTV runs). IC Role / Device Role / Timing Role: Active equalizer stage with peaking RC network in feedback loop. Use Value: 120MHz 0.1dB gain flatness supports pre-emphasis of luminance components up to 10MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6714MF | No shutdown pin; 5-pin SOT-23; 0.01% DG (slightly better video fidelity) | Lacks channel gating capability; suited for always-on video buffers | Select when shutdown is unnecessary and lowest differential gain error is critical |
| LMH6722MA | Quad-channel SOIC-14; higher 22.5mA supply current; AEC-Q100 Grade 1 option available | Higher channel density but larger footprint; automotive-qualified variant exists | Select for multi-channel integration or automotive video ECUs requiring qualification |
Compared with LMH6720MF, LMH6714MF offers superior differential gain accuracy but no shutdown control, while LMH6722MA provides quad-channel integration at the cost of higher power and larger package-making LMH6720MF optimal for single-channel, power-conscious, logic-gated video routing.
Availability
LMH6720MF is available at Aetrix Electronics and suitable for HDTV distribution systems, broadcast video multiplexers, and programmable gain amplifiers requiring stable component supply, consistent parametric performance, and RoHS-compliant SOT-23 packaging.
Supply support for LMH6720MF 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 LMH6720MF belongs to TI's LMH67xx wideband video op amp family, designed specifically for broadcast-quality video signal amplification, routing, and conditioning in professional and consumer video infrastructure.
FAQ
What is the recommended feedback resistor value for LMH6720MF at a gain of +2V/V?
The LMH6720MF datasheet specifies a 300Ω feedback resistor (RF) for non-inverting gain of +2V/V with ±5V supplies. This value delivers near-maximal bandwidth (400MHz), excellent gain flatness (0.1dB to 120MHz), and stable operation. Using RF values significantly lower than 300Ω risks peaking and oscillation; higher values reduce bandwidth. LMH6720MF requires this external RF for proper current-feedback operation.
Does LMH6720MF support single-supply operation?
Yes, LMH6720MF supports single-supply operation with VEE = 0V and VCC = +8V to +12.5V. However, the shutdown pin (SD) voltage thresholds shift: SD must remain between 0V and VCC/2–1V for reliable disable, and above 2.0V for enable. Input common-mode range extends to within 2.2V of either rail, and output swings to ±3.4V into 100Ω with ±5V supplies - design requires appropriate DC biasing for AC-coupled video signals.
How does LMH6720MF differ from LMH6714 in video performance?
LMH6720MF exhibits 0.02% differential gain error at 4.43MHz, while LMH6714 achieves 0.01% under identical conditions - a measurable improvement for demanding NTSC applications. Both share identical bandwidth (400MHz), slew rate (1800V/μs), and distortion specs. The key functional difference is LMH6720MF's integrated TTL-compatible shutdown pin (pin 6), absent in LMH6714MF, making LMH6720MF suitable for power-gated or multiplexed video paths.
Can LMH6720MF drive a 75Ω back-terminated load directly?
Yes, LMH6720MF is explicitly characterized driving 150Ω (two parallel 75Ω loads) and 75Ω back-terminated video loads. Its 70mA continuous output current and low 0.06Ω closed-loop output resistance ensure stable 2VPP swing into 75Ω with <0.1dB gain flatness to 120MHz. For optimal NTSC/PAL performance, use back-termination to minimize reflections and preserve differential phase accuracy (0.01°).
What is the thermal resistance (θJA) of the LMH6720MF SOT-23-6 package?
The LMH6720MF in the 6-pin SOT-23 (DBV) package has a thermal resistance θJA of 198°C/W, per TI's SNOSA39G datasheet. This value assumes standard JEDEC 2-layer board conditions. For sustained high-output-power operation, PCB layout must include adequate copper pour on the thermal pad (pin 4 is V−, not thermal pad) and minimize trace inductance. Junction temperature must stay below +150°C; at 85°C ambient, max allowable power dissipation is ~328mW.
LMH6720MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6
- Series:
- VIP10™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LMH6720MF FAQ
1.How can I place an order for LMH6720MF through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6720MF 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 LMH6720MF reliable?
The price and inventory of LMH6720MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6720MF is usually 5 days.
3.What payment methods are accepted for LMH6720MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6720MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6720MF?
LMH6720MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6720MF 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 LMH6720MF?
For technical support, including LMH6720MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6720MF requirements.
6.How does Aetrix verify that LMH6720MF is sourced from the original manufacturer or authorized distributors?
All LMH6720MF 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 LMH6720MF meets industry standards.
7.What is the process for return or replacement of LMH6720MF?
All LMH6720MF units undergo pre-shipment inspection (PSI). If there is an issue with LMH6720MF, 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 LMH6720MF part is unused and in its original packaging.
Return procedure for LMH6720MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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