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Texas Instruments LMH6720MAX/NOPB
- Part No.:
- LMH6720MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6720MAX/NOPB.pdf
- Description:
- IC AMP CURRENT FEEDBACK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,918
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Product details
Overview
LMH6720MAX/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 NTSC/PAL video distribution and high-speed multiplexing.
For engineers reviewing the LMH6720MAX/NOPB datasheet, LMH6720MAX/NOPB pinout, LMH6720MAX/NOPB application, or LMH6720MAX/NOPB equivalent, key selection criteria include shutdown timing (11ns turn-on / 7ns turn-off), low 5.6mA quiescent supply current, high-impedance output during disable, and SOIC-8 package compatibility with back-terminated 75Ω video loads.
Technical Context
The LMH6720MAX/NOPB implements a current-feedback topology on TI's VIP10 high-speed bipolar process, enabling gain-independent bandwidth optimization via external feedback resistor tuning (recommended RF = 300Ω for AV = +2). Its input buffer features ~180Ω inverting-input impedance and supports stable operation from AV = ±1 to ±6V/V.
Shutdown functionality is voltage-controlled (ONMIN = 2.0V, OFFMAX = 0.8V), placing the amplifier in high-impedance state with 500μA supply current while preserving signal isolation in analog multiplexer configurations - critical for shared-line video switching without crosstalk degradation.
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 |
| Supply Current | 5.6mA at ±5V - balances performance and power efficiency in portable or multi-channel systems |
| Shutdown Current | 500μA - reduces system-level standby power by >90% versus active mode |
| Turn-on Time | 11ns - allows sub-frame video channel switching in real-time broadcast routing |
| Output Current | 70mA continuous - drives back-terminated 75Ω coaxial lines without gain compression |
Pinout & Package
LMH6720MAX/NOPB is housed in an 8-pin SOIC (D) package with standard 1.27mm pitch, JEDEC MS-012AC compliant, and rated for −40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply | Accepts +4V to +6.25V; requires local 0.1μF ceramic bypass to ground |
| −IN | Inverting Input | Current-feedback node; impedance ~180Ω; sensitive to parasitic capacitance |
| +IN | Non-Inverting Input | High-impedance voltage input; common-mode range ±2.2V |
| V− | Negative Supply | Accepts −4V to −6.25V; symmetric bypassing required for distortion suppression |
| OUTPUT | Amplifier Output | Capable of ±3.8V swing into 100Ω; drives 75Ω back-terminated video loads |
| SD | Shutdown Control | TTL-compatible logic input; <0.8V disables, >2.0V enables; high-Z during disable |
| NC | No Connect | Pins 1 and 6 are internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible shutdown pin | Enables precise, nanosecond-scale channel gating in video routers without external level shifters |
| 0.1dB gain flatness to 120MHz | Preserves chroma/luma amplitude relationships across full NTSC/PAL baseband spectrum |
| −58dBc HD2 / −70dBc HD3 at 20MHz | Minimizes harmonic artifacts in wideband active filters and cable driver stages |
| Unity-gain stable | Supports buffer configurations (AV = +1) with 600Ω feedback resistor for minimal phase shift |
| Low 3.4nV/√Hz input voltage noise | Maintains SNR integrity in low-level video pre-amplification before ADC sampling |
Applications
| HDTV Video Distribution | Video Multiplexer Switching |
|---|---|
Use Scenario: Routing uncompressed 1080i/1080p component video signals across multiple displays in broadcast control rooms. IC Role / Device Role / Timing Role: Buffering and impedance-matching amplifier placed after video switch matrix outputs to drive 75Ω coaxial cables. Use Value: 0.02% differential gain error and 400MHz bandwidth preserve color fidelity and edge sharpness over 100m cable runs. | Use Scenario: Selecting one of eight camera feeds for recording or live streaming using TTL-controlled analog switching. IC Role / Device Role / Timing Role: High-speed channel selector with SD pin synchronized to frame sync pulses for glitch-free transitions. Use Value: 11ns turn-on time ensures sub-microsecond channel enablement, eliminating black screen artifacts between sources. |
| Programmable Gain Amplifier | Cable Equalization Driver |
Use Scenario: Digitally adjusting video signal amplitude in medical imaging equipment to match varying sensor output levels. IC Role / Device Role / Timing Role: Core gain stage in digitally controlled PGA architecture, with SD pin used for gain-step sequencing. Use Value: Stable operation from AV = +1 to +6V/V enables 0–18dB programmable gain range using discrete resistor networks. | Use Scenario: Compensating high-frequency loss in 150m RG-6 coaxial runs carrying SDI or analog HD video. IC Role / Device Role / Timing Role: Active equalizer with RC peaking network in feedback loop to boost 50–200MHz band. Use Value: 1800V/μs slew rate and 0.1dB flatness support accurate reconstruction of high-frequency video detail post-cable attenuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6714MAX/NOPB | No shutdown pin; 0.01% DG/DP vs. LMH6720's 0.02%; identical SOIC-8 package and pinout | Lacks channel gating capability; preferred where always-on video buffering is sufficient | Select when shutdown functionality is unnecessary and lowest possible differential gain error is required |
| THS3201DR | Higher 1.8GHz GBW but higher 12.5mA supply current; no integrated shutdown; SOIC-8 package | Better suited for RF IF amplification than composite video; lacks video-optimized distortion specs | Choose for ultra-wideband signal chain stages beyond 200MHz where power budget allows |
Compared with LMH6714MAX/NOPB and THS3201DR, the LMH6720MAX/NOPB uniquely combines broadcast-grade video fidelity (0.02% DG), nanosecond shutdown control, and SOIC-8 footprint - making it the only option among the three that supports both high-fidelity video distribution and dynamic channel multiplexing in space-constrained designs.
Availability
LMH6720MAX/NOPB is available at Aetrix Electronics and suitable for HDTV distribution systems, broadcast video routers, and industrial vision equipment requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for LMH6720MAX/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 LMH6720MAX/NOPB belongs to TI's LMH67xx wideband video op amp family, engineered specifically for broadcast-quality video signal integrity, low-power portable video systems, and high-speed analog multiplexing applications.
FAQ
What is the recommended feedback resistor value for LMH6720MAX/NOPB at AV = +2V/V?
The LMH6720MAX/NOPB datasheet specifies a recommended feedback resistor (RF) of 300Ω 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 without peaking or oscillation. Deviating significantly from 300Ω - especially lower values - risks overshoot and instability due to the current-feedback architecture's sensitivity to RF impedance.
Does LMH6720MAX/NOPB support single-supply operation?
Yes, LMH6720MAX/NOPB supports single-supply operation with VEE = ground, but shutdown pin voltage thresholds shift: ONMIN becomes ≥2.0V above ground, and OFFMAX becomes ≤0.8V above ground. The common-mode input range remains ±2.2V relative to mid-supply, so input biasing must be adjusted accordingly. Output swing is reduced versus split-supply use, with typical ±3.4V into 100Ω at VCC = +10V.
How does the shutdown function affect output impedance in LMH6720MAX/NOPB?
During shutdown, the LMH6720MAX/NOPB output enters a true high-impedance state (>1MΩ), isolating downstream circuitry. However, effective off-isolation in inverting configurations is limited by external feedback (RF) and gain-setting (RG) resistors, which remain connected. For optimal channel-to-channel isolation in multiplexers, non-inverting unity-gain configuration (AV = +1, RF = 600Ω) is recommended to eliminate RG shunting paths.
Can LMH6720MAX/NOPB drive a 75Ω back-terminated load directly?
Yes, LMH6720MAX/NOPB is explicitly characterized driving 150Ω loads (equivalent to two 75Ω terminations in parallel), delivering 0.02% differential gain error at 4.43MHz. Its 70mA continuous output current and ±3.8V swing into 100Ω ensure robust drive capability into standard 75Ω video loads with proper PCB layout - including minimized feedback loop inductance and removal of ground plane under input/output pins.
What is the thermal resistance (θJA) of the LMH6720MAX/NOPB SOIC-8 package?
The LMH6720MAX/NOPB in SOIC-8 (package D) has a junction-to-ambient thermal resistance (θJA) of 145°C/W, as specified in the TI datasheet SNOSA39G. This value assumes standard JEDEC 2-layer board conditions. For sustained 70mA output current at ±5V, power dissipation reaches ~65mW quiescent + ~120mW dynamic, requiring ambient temperatures below 85°C to maintain junction temperature under 150°C maximum.
LMH6720MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
LMH6720MAX/NOPB FAQ
1.How can I place an order for LMH6720MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6720MAX/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 LMH6720MAX/NOPB reliable?
The price and inventory of LMH6720MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6720MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6720MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6720MAX/NOPB transactions.
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4.How is shipping managed for LMH6720MAX/NOPB?
LMH6720MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6720MAX/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 LMH6720MAX/NOPB?
For technical support, including LMH6720MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6720MAX/NOPB requirements.
6.How does Aetrix verify that LMH6720MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6720MAX/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 LMH6720MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6720MAX/NOPB?
All LMH6720MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6720MAX/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 LMH6720MAX/NOPB part is unused and in its original packaging.
Return procedure for LMH6720MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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