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Texas Instruments LMH6682MM/NOPB
- Part No.:
- LMH6682MM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6682MM/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
LMH6682MM/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 error, and 0.08° differential phase error at NTSC 3.58MHz - enabling precision composite video amplification in portable and embedded video interfaces.
For engineers reviewing the LMH6682MM/NOPB datasheet, LMH6682MM/NOPB pinout, LMH6682MM/NOPB application, or LMH6682MM/NOPB equivalent, key selection criteria include video-grade AC performance (DG/DP), rail-to-rail output swing capability (0.8V from rails into 2kΩ), input common-mode range extending 0.5V beyond V−, low 12nV/√Hz input voltage noise at 100kHz, and immunity to output phase reversal under input overdrive.
Technical Context
The LMH6682MM/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-Gm architectures. Its VIP10 silicon process ensures high speed-to-quiescent-current efficiency.
Designed specifically for video signal chains, it maintains stable operation at gains ≥ +2 and ≤ −1, supports input common-mode voltages from −5.5V to +3.3V (±5V supply), and drives ±85mA output current while delivering 0.1dB gain flatness up to 25MHz and 1° linear-phase deviation up to 40MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at A = +2 (±5V) - supports full NTSC/PAL baseband video bandwidth with margin |
| Slew Rate | 940V/μs - enables clean 2VPP pulse response with <42ns settling (±0.1%) |
| Differential Gain Error | 0.01% (NTSC 3.58MHz) - preserves color saturation accuracy in cascaded video stages |
| Differential Phase Error | 0.08° (NTSC 3.58MHz) - minimizes hue shift across luminance/chrominance components |
| Input Common-Mode Range | −5.5V to +3.3V (±5V supply) - accepts ground-referenced video inputs without level-shifting |
| Output Voltage Swing | 0.8V from either rail into 2kΩ - maximizes dynamic range in single-supply 5V systems |
| Supply Current per Channel | 6.5mA - balances speed and power for battery-operated portable video equipment |
| Input Voltage Noise | 12nV/√Hz at 100kHz - contributes <0.5mV RMS noise in 5MHz video bandwidth |
Pinout & Package
VSSOP-8 (DGK) package: ultra-miniature 3mm × 3mm surface-mount footprint with 0.65mm lead pitch, optimized for space-constrained portable video PCBs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Ch1) | High-impedance node for feedback network connection; supports stable operation down to gain −1 |
| 2 | Non-Inverting Input (Ch1) | Accepts input signals extending 0.5V below V−; immune to phase reversal on overdrive |
| 3 | Output (Ch1) | Capable of ±85mA drive into resistive loads; swings within 0.8V of rails into 2kΩ |
| 4 | V− | Negative supply pin; supports single-supply (0V–5V) or split-supply (±5V) operation |
| 5 | V+ | Positive supply pin; maximum rating 12.6V; thermal resistance θJA = 235°C/W |
| 6 | Output (Ch2) | Independent output stage; cross-talk rejection >77dB at 5MHz between channels |
| 7 | Non-Inverting Input (Ch2) | Identical DC/AC specs to Pin 2; enables dual-channel synchronous video processing |
| 8 | Inverting Input (Ch2) | Matches Pin 1 electrical behavior; supports identical gain configurations per channel |
Key Features
| Feature | Design Value |
|---|---|
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures broadcast-grade color fidelity |
| Phase reversal immunity | Outputs clamp to rail without polarity inversion when inputs exceed common-mode range |
| Rail-to-rail output swing | Delivers 4.2VPP into 2kΩ on 5V single supply - maximizes SNR in low-voltage systems |
| High closed-loop stability | Stable at gains ≥ +2 and ≤ −1 without external compensation |
| Low distortion in inverting mode | THD = −63dBc @5MHz, 2VPP, RL = 2kΩ - optimal for ADC driver applications |
| Capacitive load drive | Stable with series isolation resistor; suitable for driving ADC input capacitance directly |
Applications
| Composite Video Amplifier | ADC Driver |
|---|---|
Use Scenario: Amplifying NTSC/PAL composite video signals in portable DVD players or video capture dongles. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage preserving luminance/chrominance integrity across full 0–5.5MHz bandwidth. Use Value: 0.01% DG/0.08° DP error prevents cumulative color distortion in multi-stage video chains. |
Use Scenario: Driving SAR or pipeline ADC inputs in high-speed data acquisition systems. IC Role / Device Role / Timing Role: High-fidelity unity-gain or gain-of-two buffer isolating sensitive ADC front-end from source impedance variations. Use Value: 190MHz bandwidth and 940V/μs slew rate support accurate sampling of fast transient signals up to 10MHz. |
| Portable Communications Interface | Current Sense Buffer |
Use Scenario: Signal conditioning for RF front-end I/Q baseband paths in handheld radios or SDR platforms. IC Role / Device Role / Timing Role: Low-noise, high-linearity dual op-amp providing matched gain/phase for quadrature signal pairs. Use Value: 77dB inter-channel crosstalk rejection at 5MHz prevents I/Q imbalance-induced image artifacts. |
Use Scenario: Amplifying mV-level shunt voltage drops in motor control or power supply monitoring circuits. IC Role / Device Role / Timing Role: Precision low-offset, high CMRR buffer converting bidirectional current sense signals to single-ended outputs. Use Value: Input common-mode range extending 0.5V beyond V− allows direct sensing on low-side shunts referenced to ground. |
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 |
|---|---|---|---|
| LMH6628MA/NOPB | Higher 1.5GHz GBW but lower 0.05% DG error; 12.5mA/channel supply current | Better suited for RF IF amplification than video; lacks phase reversal immunity | Select when bandwidth >500MHz required and DG/DP specs are secondary |
| THS3202DGN | 1.8GHz GBW, 3000V/μs slew rate, but 0.05% DG/0.15° DP; requires ±15V supplies | Targeted at high-fidelity test equipment; not optimized for portable 5V video systems | Choose for ultra-high-speed analog signal routing where power and board space allow larger packages |
Compared with LMH6682MM/NOPB, LMH6628MA/NOPB trades video-grade DG/DP accuracy for raw bandwidth and THS3202DGN sacrifices low-voltage operation and phase reversal immunity for extreme slew rate - making LMH6682MM/NOPB the only option meeting all three requirements: 190MHz BW, 0.01% DG, and single-supply compatibility in VSSOP-8.
Availability
LMH6682MM/NOPB is available at Aetrix Electronics and suitable for portable video interfaces, high-speed ADC buffering, and current-sense signal conditioning requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for LMH6682MM/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-performance op-amps and video signal chain solutions.
The LMH6682MM/NOPB belongs to TI's LMH66xx video op-amp family, engineered specifically for broadcast-quality composite video amplification, ADC buffering, and portable communications interfaces demanding low DG/DP, rail-to-rail output, and phase reversal immunity.
FAQ
What is the maximum operating supply voltage for LMH6682MM/NOPB?
The LMH6682MM/NOPB has an absolute maximum supply voltage (V+ − V−) of 12.6V. Its recommended operating range is 3V to 12V total supply span, supporting both single-supply (e.g., 0V to 5V) and split-supply (e.g., ±5V) configurations. Operation above 12.6V risks permanent device damage, and continuous short-circuit conditions above 6V supply require limiting duration to 1.5ms per TI's Absolute Maximum Ratings table.
Does LMH6682MM/NOPB support rail-to-rail input operation?
No, LMH6682MM/NOPB does not support rail-to-rail input. Its input common-mode voltage range extends 0.5V beyond V− and to within 1.7V of V+, specified as −5.5V to +3.3V under ±5V supply. This allows ground-referenced video inputs in single-supply systems but does not accommodate signals at the positive rail. The device is explicitly designed for video applications where this range covers standard CVBS and Y/C signal levels.
Can LMH6682MM/NOPB drive a 75Ω video load directly?
Yes, LMH6682MM/NOPB can drive a 75Ω load, delivering ±40mA output current with 3.5VPP swing (typical) under ±5V supply. However, differential gain and phase performance degrades slightly versus 150Ω loads - DG increases to 0.03% and DP to 0.05° per the 5V Electrical Characteristics table. For broadcast-grade video, TI recommends 150Ω termination; 75Ω is acceptable for non-critical portable applications where size/power constraints outweigh ultimate fidelity.
What evaluation board is recommended for LMH6682MM/NOPB?
The official TI evaluation board for LMH6682MM/NOPB is CLC730123, designed specifically for the VSSOP-8 package. It provides optimized high-frequency layout, proper decoupling, 75Ω/150Ω output terminations, and test points for differential gain/phase measurement. This board enables rapid validation of LMH6682MM/NOPB's video performance per EIA-770.1 standards and serves as a reference for PCB stackup and grounding in portable video designs.
Is LMH6682MM/NOPB compatible with lead-free reflow processes?
Yes, LMH6682MM/NOPB is RoHS-compliant and rated for lead-free reflow with MSL Level-1 (unlimited floor life) and peak reflow temperature of 260°C. Its VSSOP-8 (DGK) package uses Sn (tin) lead finish and is qualified for standard IR/convection soldering (20 sec at 235°C) and wave soldering (10 sec at 260°C), per TI's Packaging Information Addendum. No special pre-bake or handling is required prior to assembly.
LMH6682MM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-VSSOP
LMH6682MM/NOPB FAQ
1.How can I place an order for LMH6682MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MM/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 LMH6682MM/NOPB reliable?
The price and inventory of LMH6682MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MM/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6682MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MM/NOPB?
LMH6682MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MM/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 LMH6682MM/NOPB?
For technical support, including LMH6682MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MM/NOPB requirements.
6.How does Aetrix verify that LMH6682MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6682MM/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 LMH6682MM/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6682MM/NOPB?
All LMH6682MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MM/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 LMH6682MM/NOPB part is unused and in its original packaging.
Return procedure for LMH6682MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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