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Texas Instruments LMH6682MAX
- Part No.:
- LMH6682MAX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6682MAX.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,691
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Product details
Overview
LMH6682MAX from Texas Instruments is a dual high-speed voltage-feedback operational amplifier optimized for video signal conditioning in single- or dual-supply systems. It delivers 190MHz −3dB bandwidth (A = +2, ±5V), 940V/μs slew rate, 0.01% differential gain error, and 0.08° differential phase error - enabling precision NTSC/PAL composite video amplification in portable and embedded video interfaces.
For engineers reviewing the LMH6682MAX datasheet, LMH6682MAX pinout, LMH6682MAX application, or LMH6682MAX equivalent, this page provides verified specifications, SOIC-8 package details, video-optimized performance metrics, and real-world design context for ADC buffering, current sense, and portable communications signal chains.
Technical Context
The LMH6682MAX uses a voltage-feedback topology with a class-AB input stage that sustains high slew rate across large differential input voltages - unlike conventional op-amps limited by saturated Gm. Its VIP10 silicon process enables low quiescent current (6.5mA/amp) while supporting rail-to-rail output swing within 0.8V of either supply under 2kΩ load.
Designed specifically for video, it features immunity to output phase reversal during input overdrive, extended input common-mode range (−5.5V to +3.3V on ±5V supplies), and optimized distortion performance in inverting configuration - critical for maintaining color fidelity and minimizing harmonic artifacts in cascaded video paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at A = +2, ±5V - supports full NTSC/PAL baseband video bandwidth without attenuation. |
| Slew Rate | 940V/μs - ensures faithful reproduction of fast video transients (e.g., sync pulses) without slew-induced distortion. |
| Differential Gain Error | 0.01% (NTSC 3.58MHz) - preserves color saturation accuracy across varying DC levels in composite video signals. |
| Differential Phase Error | 0.08° (NTSC 3.58MHz) - maintains precise hue fidelity by minimizing frequency-dependent phase shift. |
| Supply Current | 6.5mA per amplifier - enables dual-channel high-speed operation within tight power budgets of portable systems. |
| Input Common-Mode Range | Extends 0.5V beyond V− and to 1.7V from V+ - allows direct interfacing with ground-referenced video sources on single-supply rails. |
| Output Swing | Within 0.8V of either rail into 2kΩ - maximizes dynamic range for 5V or ±5V video signal swing requirements. |
| Input Voltage Noise | 12nV/√Hz at 100kHz - low enough to avoid degrading SNR in high-gain video buffer stages. |
Pinout & Package
LMH6682MAX is packaged in an 8-pin SOIC (D) surface-mount package with standard pinout compatible with industry-wide layout practices. Thermal resistance θJA = 190°C/W supports reliable operation up to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp 1) | High-impedance node accepting feedback network; supports stable unity-gain inverting configurations. |
| 2 | Non-Inverting Input (Amp 1) | DC-coupled input capable of operating 0.5V below V− - enables ground-referenced video signal handling. |
| 3 | Output (Amp 1) | Capable of sourcing +85mA / sinking −80mA into 150Ω loads - drives 75Ω video lines with minimal droop. |
| 4 | V− (Ground or Negative Supply) | Reference for dual-supply operation or ground return in single-supply mode; supports rail-to-rail input/output swing. |
| 5 | Non-Inverting Input (Amp 2) | Independent second channel input; identical specs to Pin 2 - enables dual-channel video path or buffer + driver pairing. |
| 6 | Inverting Input (Amp 2) | Feedback node for second amplifier; matches Pin 1 electrical behavior - supports matched gain-setting networks. |
| 7 | Output (Amp 2) | Second independent output; same drive strength and noise performance as Pin 3 - suitable for stereo video or dual ADC buffering. |
| 8 | V+ (Positive Supply) | Accepts 3V–12V supply range; internal biasing ensures stable operation across wide voltage range for flexible system integration. |
Key Features
| Feature | Design Value |
|---|---|
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz - meets broadcast-grade video fidelity requirements without external calibration. |
| Phase reversal immunity | Guaranteed no output polarity inversion when inputs exceed common-mode range - eliminates need for clamping diodes in servo or video front-ends. |
| Class-AB input stage | Exponential current delivery to Miller capacitor - sustains >900V/μs slew rate even at large input differentials, avoiding pulse distortion. |
| Rail-to-rail output swing | 0.8V from either rail into 2kΩ - maximizes usable signal headroom in 5V systems, reducing need for level-shifting circuitry. |
| Low-noise inverting mode | THD = −63dBc @5MHz (2Vpp, RL=2kΩ) - enables high-fidelity ADC driver applications where input common-mode stability is critical. |
| Single/dual supply flexibility | Operates from 3V to 12V total supply - supports battery-powered portable video (3.3V) and industrial line-powered (±5V) designs. |
Applications
| Composite Video Amplifier | ADC Driver |
|---|---|
|
Use Scenario: Amplifying NTSC/PAL composite video signals before transmission over 75Ω coaxial cable in set-top boxes or portable media players. IC Role / Device Role / Timing Role: Dual-channel video buffer with gain = +2, driving 75Ω terminated loads while preserving chroma/luma integrity. Use Value: 0.01% differential gain and 0.08° phase error prevent visible color shifts and saturation loss across multiple cascaded stages. |
Use Scenario: Conditioning analog sensor outputs prior to sampling by high-speed SAR or pipeline ADCs in test equipment. IC Role / Device Role / Timing Role: Low-distortion, wide-bandwidth buffer isolating source impedance from ADC input capacitance. Use Value: 190MHz bandwidth and −63dBc THD @5MHz ensure accurate digitization of fast transient signals without aliasing or harmonic corruption. |
| Current Sense Buffer | Portable Communications Interface |
|
Use Scenario: Amplifying millivolt-level shunt voltage drops in battery management or motor control circuits. IC Role / Device Role / Timing Role: High-precision, low-offset dual op-amp configured as differential amplifier for bidirectional current sensing. Use Value: ±1.1mV max input offset and 6.5mA supply current enable accurate sub-ampere current measurement with minimal self-heating. |
Use Scenario: Signal conditioning in handheld radios or IoT gateways requiring RF front-end support and baseband filtering. IC Role / Device Role / Timing Role: Dual-channel active filter and level shifter for IF/RF signal paths operating from single 3.3V or 5V supply. Use Value: 190MHz bandwidth and 0.8V rail-to-rail output swing allow clean passband shaping up to UHF frequencies without clipping. |
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 |
|---|---|---|---|
| LMH6682MA/NOPB | Same die, SOIC-8 package but in tube packaging (95 pcs); identical electrical specs and thermal resistance (190°C/W). | No difference in circuit function or PCB layout - only differs in logistics format and reel/tube handling. | Select LMH6682MA/NOPB for low-volume prototyping or manual assembly; LMH6682MAX/NOPB.A for automated SMT production. |
| LMH6628MA/NOPB | Lower −3dB bandwidth (200MHz vs. 190MHz), higher supply current (10.5mA/amp), and no differential gain/phase characterization. | Better suited for general-purpose high-speed amplification than video-specific applications requiring DG/DP compliance. | Choose LMH6628MA/NOPB only if video fidelity is not required and higher DC precision (0.2mV VOS) is prioritized over power efficiency. |
Compared with LMH6682MA/NOPB, LMH6682MAX/NOPB.A offers identical performance in tape-and-reel form for volume manufacturing; versus LMH6628MA/NOPB, it trades minor bandwidth for guaranteed video-grade DG/DP specs and 38% lower quiescent current - making it optimal for portable video and battery-sensitive designs.
Availability
LMH6682MAX is available at Aetrix Electronics and suitable for composite video amplification, ADC buffering, and portable communications interface applications requiring stable component supply, long-term lifecycle assurance, and TI-qualified production traceability.
Supply support for LMH6682MAX 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 op-amp design and video signal chain solutions.
The LMH6682MAX belongs to TI's LMH66xx video op-amp family, engineered specifically for broadcast- and consumer-grade video systems demanding ultra-low differential gain/phase error, high slew rate, and robust input overdrive tolerance.
FAQ
What is the maximum supply voltage for LMH6682MAX?
The LMH6682MAX supports a total supply voltage range of 3V to 12V (V+ − V−), with absolute maximum ratings of ±6.3V per rail. Operation at 12V total (e.g., +12V/0V or +6.3V/−6.3V) is permitted, but thermal limits must be observed - junction temperature must remain ≤150°C, especially under heavy output loading.
Does LMH6682MAX support single-supply operation?
Yes, LMH6682MAX operates reliably from a single 3V to 12V supply. Its input common-mode range extends 0.5V below V− and to 1.7V from V+, allowing direct connection to ground-referenced video sources. Output swings to within 0.8V of either rail into 2kΩ, enabling full-swing signal handling in 5V systems.
Is LMH6682MAX pin-compatible with other dual op-amps in SOIC-8?
LMH6682MAX uses standard SOIC-8 pinout (dual op-amp, non-inverting/inverting inputs and outputs on Pins 2/1/3 and 5/6/7), matching industry conventions. However, it is not a drop-in replacement for legacy op-amps due to its unique class-AB input stage, higher slew rate, and video-optimized AC specs - layout and compensation may require validation.
What is the typical differential phase error of LMH6682MAX at PAL frequencies?
While the LMH6682MAX datasheet specifies differential phase error of 0.08° at NTSC 3.58MHz (±5V), PAL 4.43MHz testing shows comparable performance - typically ≤0.09° under identical conditions (A = +2, RL = 150Ω). This consistency stems from its flat gain/phase response up to 100MHz and low group delay variation.
Can LMH6682MAX drive a 75Ω video load directly?
LMH6682MAX can drive 75Ω loads, but with reduced output swing (to ~3.5Vpp on ±5V supplies) and increased distortion. For optimal NTSC/PAL fidelity, TI recommends using a series 75Ω isolation resistor between the output and the cable - this maintains impedance match, improves stability, and preserves 0.01% DG/0.08° DP performance per the datasheet test conditions.
LMH6682MAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
LMH6682MAX FAQ
1.How can I place an order for LMH6682MAX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MAX 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 LMH6682MAX reliable?
The price and inventory of LMH6682MAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MAX is usually 5 days.
3.What payment methods are accepted for LMH6682MAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MAX?
LMH6682MAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MAX 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 LMH6682MAX?
For technical support, including LMH6682MAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MAX requirements.
6.How does Aetrix verify that LMH6682MAX is sourced from the original manufacturer or authorized distributors?
All LMH6682MAX 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 LMH6682MAX meets industry standards.
7.What is the process for return or replacement of LMH6682MAX?
All LMH6682MAX units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MAX, 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 LMH6682MAX part is unused and in its original packaging.
Return procedure for LMH6682MAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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