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Texas Instruments LMH6682MA/NOPB
- Part No.:
- LMH6682MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6682MA/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:215
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Product details
Overview
LMH6682MA/NOPB from Texas Instruments is a dual high-speed voltage-feedback operational amplifier optimized for video signal conditioning in single- or split-supply systems. It delivers 190MHz −3dB bandwidth (A = +2, ±5V), 940V/μs slew rate, 0.01% differential gain and 0.08° differential phase error at NTSC 3.58MHz, and drives ±85mA output current - enabling direct buffering of composite video, ADC inputs, and portable video interfaces.
For engineers reviewing the LMH6682MA/NOPB datasheet, LMH6682MA/NOPB pinout, LMH6682MA/NOPB application, or LMH6682MA/NOPB equivalent, key selection criteria include video-grade AC performance (DG/DP), rail-to-rail input capability (−0.5V beyond V−, 1.7V from V+), output swing within 0.8V of rails (2kΩ load), low 12nV/√Hz input noise at 100kHz, and immunity to input-overvoltage phase reversal.
Technical Context
The LMH6682MA/NOPB employs a voltage-feedback topology with a class-AB input stage that delivers exponential transconductance versus input differential voltage - enabling higher slew rate at large signal transients compared to conventional saturated-input op amps. Its VIP10 silicon process ensures high speed-to-quiescent-current efficiency (6.5mA/amp).
Designed specifically for video signal chains, it maintains stable gain flatness (±0.1dB to 25MHz) and linear phase response (±1° to 40MHz) under 150Ω video loads, while supporting gains ≥+2 or ≤−1 without compensation. Input common-mode range extends 0.5V below V− and to within 1.7V of V+, and output swings to within 0.8V of either rail with 2kΩ loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at A = +2, ±5V supply - supports full NTSC/PAL baseband video bandwidth with margin. |
| Slew Rate | 940V/μs (±5V, A = +2) - enables clean 2VPP pulse response with <42ns settling to ±0.1%. |
| Differential Gain / Phase | 0.01% / 0.08° at NTSC 3.58MHz, 150Ω load - meets broadcast-grade video fidelity requirements. |
| Input Voltage Noise | 12nV/√Hz at 100kHz - minimizes added noise in high-frequency signal paths like ADC drivers. |
| Output Drive Current | +85/−80mA - directly drives 75Ω video lines or heavy capacitive loads via series isolation resistor. |
| Supply Current per Channel | 6.5mA (typical, no load) - balances speed and power for portable and battery-sensitive designs. |
| Operating Temperature Range | −40°C to +85°C - qualified for industrial and automotive cabin-temperature video subsystems. |
Pinout & Package
LMH6682MA/NOPB is housed in an 8-pin SOIC (D) package with standard dual-op-amp pinout and surface-mount footprint (5.0mm × 6.2mm, 1.75mm height). Thermal resistance θJA = 190°C/W on standard 2-layer PCB.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node accepting differential input; supports rail-to-rail common-mode range. |
| 2 | Non-Inverting Input (Channel A) | High-impedance node; enables unity-gain stable non-inverting configurations up to A = +2. |
| 3 | Output (Channel A) | Capable of sourcing +85mA/sinking −80mA into 2kΩ; swings to within 0.8V of V+/V− rails. |
| 4 | V− (Negative Supply) | Ground reference in single-supply mode; accepts −5V in split-supply operation. |
| 5 | Non-Inverting Input (Channel B) | Independent input for second channel; identical DC/AC specs to Channel A. |
| 6 | Inverting Input (Channel B) | Independent input for second channel; supports same video-optimized AC performance. |
| 7 | Output (Channel B) | Fully independent output; enables dual-channel video buffering or differential driver stages. |
| 8 | V+ (Positive Supply) | Accepts 3V–12V total supply range; operates from single 5V or ±5V supplies. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Accepts signals 0.5V below V− and up to 1.7V below V+ - eliminates level-shifting in single-supply video front-ends. |
| Phase-reversal immunity | Output clamps at rail during input overvoltage - prevents catastrophic failure in servo or feedback-critical applications. |
| Video-optimized AC specs | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures color fidelity across cascaded video amplifiers. |
| Class-AB input architecture | Delivers exponential slew current vs. input differential voltage - sustains high slew rate at large-signal transients. |
| Low distortion in inverting mode | THD = −63dBc @5MHz, 2VPP, RL = 2kΩ - preferred configuration for precision ADC buffer applications. |
Applications
| Composite Video Distribution | ADC Input Buffering |
|---|---|
Use Scenario: Amplifying and distributing NTSC/PAL composite video signals across multiple monitors or recording devices. IC Role / Device Role / Timing Role: Dual-channel video buffer driving 75Ω coaxial lines with minimal gain/phase error accumulation. Use Value: 0.01% differential gain and 0.08° differential phase preserve color saturation and hue accuracy across long cable runs. |
Use Scenario: Driving the sampling input of high-speed analog-to-digital converters in imaging or instrumentation systems. IC Role / Device Role / Timing Role: High-fidelity unity-gain or gain-of-two buffer isolating ADC input from source impedance variations. Use Value: 190MHz bandwidth and 940V/μs slew rate support >10MSPS sampling with <42ns settling to ±0.1%. |
| Portable Video Interface | Current-Sense Signal Conditioning |
Use Scenario: Signal conditioning in handheld medical displays, automotive infotainment, or consumer camcorders. IC Role / Device Role / Timing Role: Low-power dual op amp providing video gain, DC restoration, and sync tip clamping. Use Value: 6.5mA/amp quiescent current and −40°C to +85°C rating enable reliable operation in space- and thermal-constrained enclosures. |
Use Scenario: Amplifying millivolt-level shunt voltage drops in motor control or power supply monitoring circuits. IC Role / Device Role / Timing Role: Precision current-sense amplifier with rail-to-rail input and fast transient response. Use Value: Input common-mode range extending 0.5V below ground allows sensing on low-side shunts without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher 1.5GHz GBW, lower 4.2mA/amp supply current, but only 45mA output drive and no guaranteed DG/DP specs. | Better suited for RF IF amplification or wideband active filters; not validated for broadcast video fidelity. | Select LMH6629MA/NOPB when bandwidth >500MHz is required and video DG/DP compliance is unnecessary. |
| THS3202D | 1.8GHz GBW, ±120mA output, but requires ±15V supplies and has no rail-to-rail input; DG/DP not specified. | Targeted at high-voltage, high-current line drivers; incompatible with 3.3V/5V portable systems. | Choose THS3202D only for high-voltage (>±10V) video distribution where LMH6682MA/NOPB's 12V max supply is insufficient. |
Compared with LMH6682MA/NOPB, LMH6629MA/NOPB trades video-specific AC performance for ultra-wide bandwidth and lower power, while THS3202D provides higher output current at the cost of supply voltage compatibility and missing video-grade specifications - making LMH6682MA/NOPB the optimal choice for cost-sensitive, single-supply video signal chains requiring guaranteed DG/DP.
Availability
LMH6682MA/NOPB is available at Aetrix Electronics and suitable for composite video distribution, ADC input buffering, and portable video interface applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for LMH6682MA/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, embedded processing, and connectivity technologies, with decades of expertise in high-performance op amp design and video signal chain solutions.
The LMH6682MA/NOPB belongs to TI's LMH video op amp family, engineered specifically for broadcast- and consumer-grade video systems demanding low differential gain/phase error, high slew rate, and robust input-stage behavior under overvoltage conditions.
FAQ
What supply voltage range does the LMH6682MA/NOPB support?
The LMH6682MA/NOPB operates from a total supply voltage of 3V to 12V, supporting both single-supply (e.g., 5V, V− = GND) and split-supply (e.g., ±5V) configurations. Absolute maximum supply is 12.6V. At ±5V, it achieves its full 190MHz bandwidth and 940V/μs slew rate - critical for NTSC/PAL video fidelity. The LMH6682MA/NOPB maintains functional operation across −40°C to +85°C ambient temperature.
Does the LMH6682MA/NOPB require external compensation for stability?
No, the LMH6682MA/NOPB is unity-gain stable and does not require external compensation components. It remains stable for closed-loop gains ≥+2 (non-inverting) or ≤−1 (inverting) without added capacitance or resistors. This simplifies layout in video buffer and ADC driver applications. The device's internal compensation is optimized for 150Ω–2kΩ loads typical in video and data acquisition systems - the LMH6682MA/NOPB delivers flat frequency response and minimal peaking under these conditions.
How does the LMH6682MA/NOPB handle input overvoltage conditions?
The LMH6682MA/NOPB is immune to output phase reversal when input voltages exceed the specified common-mode range - a known failure mode in many op amps. During overvoltage, its output clamps predictably at the nearest supply rail instead of inverting polarity. This behavior eliminates risk of latch-up or system instability in servo loops or feedback-critical circuits. However, absolute maximum input voltage limits (V+ +0.8V, V− −0.8V) must still be observed to prevent permanent damage - the LMH6682MA/NOPB does not include integrated input protection diodes.
Can the LMH6682MA/NOPB drive 75Ω video loads directly?
Yes, the LMH6682MA/NOPB can drive 75Ω video loads directly, delivering ±85mA output current and maintaining 0.01% differential gain / 0.08° differential phase at NTSC 3.58MHz. For optimal pulse fidelity and minimal overshoot, TI recommends using a 33Ω–47Ω series isolation resistor between the output and 75Ω load - this dampens potential ringing caused by PCB trace inductance and connector capacitance. The LMH6682MA/NOPB's high output drive and low distortion make it suitable for both baseband and sync-tip clamped video distribution.
What is the thermal performance of the LMH6682MA/NOPB in SOIC-8 package?
The LMH6682MA/NOPB in SOIC-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 190°C/W on a standard 2-layer PCB with JEDEC-standard copper pour. At 6.5mA/amp quiescent current and moderate output loading, junction temperature rise remains well below the 150°C maximum under typical operating conditions. For high-output-current or high-ambient-temperature use, adding thermal vias under the exposed pad (if present) or increasing copper area improves dissipation - the LMH6682MA/NOPB's VIP10 process inherently minimizes thermal generation per unit speed.
LMH6682MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 940V/µs
- Gain Bandwidth Product:
- 120 MHz
- -3db Bandwidth:
- 190 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 6.5mA (x2 Channels)
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMH6682MA/NOPB FAQ
1.How can I place an order for LMH6682MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MA/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 LMH6682MA/NOPB reliable?
The price and inventory of LMH6682MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6682MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MA/NOPB?
LMH6682MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MA/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 LMH6682MA/NOPB?
For technical support, including LMH6682MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MA/NOPB requirements.
6.How does Aetrix verify that LMH6682MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6682MA/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 LMH6682MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6682MA/NOPB?
All LMH6682MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MA/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 LMH6682MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6682MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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