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Texas Instruments LMH6682MMX
- Part No.:
- LMH6682MMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6682MMX.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,319
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Product details
Overview
LMH6682MMX from Texas Instruments is a high-speed dual voltage-feedback operational amplifier optimized for video signal conditioning in single-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 LMH6682MMX datasheet, LMH6682MMX pinout, LMH6682MMX application, or LMH6682MMX equivalent, this page provides verified technical context, package-specific pin mapping, real-world video and ADC buffer use cases, and two validated alternative op-amps with documented performance trade-offs.
Technical Context
The LMH6682MMX employs a voltage-feedback topology with a class-AB input stage that delivers exponential current to the Miller compensation capacitor - enabling higher slew rate at large differential input voltages versus conventional saturated-input op-amps. This architecture supports stable operation at gains ≥ +2 and ≤ −1 without external compensation.
Its input common-mode range extends 0.5V beyond V− and to within 1.7V of V+, while the rail-to-rail output swing reaches within 0.8V of either supply under 2kΩ load. The device is fabricated in TI's VIP10 process, balancing speed (190MHz BW) and quiescent current (6.5mA/amp) for power-sensitive video front-ends.
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% at 3.58MHz NTSC - preserves color saturation accuracy in cascaded video chains |
| Differential Phase Error | 0.08° at 3.58MHz NTSC - maintains hue fidelity across DC-coupled video paths |
| Supply Current per Channel | 6.5mA - enables dual-channel video buffering in battery-powered portable systems |
| Input Voltage Noise | 12nV/√Hz at 100kHz - low-noise performance critical for high-SNR ADC driver stages |
| Output Drive Current | +85/−80mA - drives 150Ω video loads or 2kΩ ADC inputs without gain loss |
Pinout & Package
VSSOP-8 (DGK) package: ultra-miniature 3mm × 3mm surface-mount footprint with 0.65mm pitch, optimized for space-constrained portable video PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | Delivers full-swing video or buffered signal; capable of sourcing +85mA/sinking −80mA |
| 2 (−IN A) | Inverting input A | High-impedance node; accepts feedback network for inverting gain configurations |
| 3 (+IN A) | Non-inverting input A | Supports rail-to-rail common-mode range (−5.2V to +3.3V, ±5V supply) |
| 4 (V−) | Negative supply | Ground reference in single-supply mode; must be decoupled with 0.1μF ceramic |
| 5 (+IN B) | Non-inverting input B | Independent channel input; identical CMVR and noise specs as Channel A |
| 6 (−IN B) | Inverting input B | Enables dual-channel independent gain control or differential-to-single-ended conversion |
| 7 (OUT B) | Channel B output | Electrically isolated from OUT A; cross-talk rejection >77dB at 5MHz |
| 8 (V+) | Positive supply | Accepts 3V–12V total supply range; requires local 0.1μF + 4.7μF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Phase reversal immunity | Guaranteed no output polarity inversion when inputs exceed specified CMVR - eliminates need for clamping diodes in servo or video sync circuits |
| Rail-to-rail output swing | Swings to within 0.8V of V+ or V− driving 2kΩ - maximizes dynamic range in 3.3V or 5V single-supply video systems |
| Low distortion in inverting mode | THD = −63dBc @5MHz, 2VPP, RL = 2kΩ - enables high-fidelity ADC buffering with minimal harmonic corruption |
| High capacitive load drive | Stable with ≥100pF loads using series isolation resistor - suitable for driving ADC input capacitance without oscillation |
| Video-optimized AC specs | DG/DP <0.01%/0.08° at 3.58MHz - meets broadcast-grade video linearity requirements for professional and consumer equipment |
Applications
| Composite Video Amplifier | ADC Input Buffer |
|---|---|
Use Scenario: Amplifying NTSC composite video signals in portable DVD players before RGB decoding. IC Role / Device Role / Timing Role: Dual-channel video gain block with DC-coupled signal path and precise amplitude/phase fidelity. Use Value: 0.01% DG and 0.08° DP ensure accurate color reproduction across temperature and supply variation. |
Use Scenario: Driving SAR or pipeline ADC inputs in industrial data acquisition systems. IC Role / Device Role / Timing Role: High-speed, low-noise unity-gain buffer isolating source impedance from ADC sampling capacitance. Use Value: 940V/μs slew rate and 12nV/√Hz noise preserve SNR and prevent aperture jitter-induced distortion. |
| Portable Communications Front-End | Current Sense Signal Conditioning |
Use Scenario: Amplifying IF or baseband I/Q signals in handheld radios and software-defined radio modules. IC Role / Device Role / Timing Role: Dual-channel wideband amplifier supporting complex modulation schemes up to 100MHz. Use Value: 190MHz bandwidth and low 1.9ns rise time enable clean pulse shaping for QPSK/QAM waveforms. |
Use Scenario: Amplifying mV-level shunt voltage drops in motor control or power supply monitoring circuits. IC Role / Device Role / Timing Role: Precision dual op-amp configured as difference amplifier with matched gain channels. Use Value: 0.01% gain matching and 82dB CMRR suppress common-mode noise from high-current switching environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher 1.5GHz GBW but 12mA/amp supply current; 2.5mV VOS vs. LMH6682MMX's 1mV typical | Better for RF IF gain stages requiring >500MHz small-signal BW; less optimal for battery-powered video due to current draw | Select LMH6629MA/NOPB only when bandwidth >500MHz is required and power budget allows ≥80% higher quiescent current |
| THS3202DGN | Lower 150MHz BW, 3000V/μs slew rate, 10.5mA/amp; no guaranteed DG/DP specs for video | Optimized for current-feedback architecture in high-slew applications like pulse amplification; lacks video-validated AC linearity | Choose THS3202DGN for transient-heavy signals where slew dominates over video fidelity; avoid for NTSC/PAL systems requiring DG/DP compliance |
Compared with LMH6682MMX, LMH6629MA/NOPB trades 2× power for 8× bandwidth and relaxed video linearity, while THS3202DGN sacrifices DG/DP validation for extreme slew rate - making LMH6682MMX the only option meeting broadcast-grade video specs at 6.5mA/channel.
Availability
LMH6682MMX is available at Aetrix Electronics and suitable for portable video, ADC buffering, and current sense signal conditioning requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for LMH6682MMX 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 over 50 years of innovation in high-performance op-amps and signal chain solutions.
The LMH6682MMX belongs to TI's LMH video op-amp family, designed specifically for broadcast-quality composite video amplification, portable multimedia interfaces, and high-fidelity analog front-ends where differential gain/phase accuracy is critical.
FAQ
What is the operating supply voltage range for the LMH6682MMX?
The LMH6682MMX operates from a total supply voltage of 3V to 12V (V+ − V−), supporting both single-supply (e.g., 3.3V or 5V) and split-supply (e.g., ±5V) configurations. At ±5V, it achieves its full 190MHz bandwidth and 940V/μs slew rate. The LMH6682MMX maintains functional operation across −40°C to +85°C ambient temperature.
Does the LMH6682MMX support rail-to-rail input and output operation?
The LMH6682MMX features rail-to-rail output swing - delivering within 0.8V of V+ or V− into 2kΩ - but does not have rail-to-rail input. Its input common-mode voltage range extends 0.5V beyond V− and to within 1.7V of V+, enabling robust operation in single-supply video systems where the input signal may approach ground or mid-supply.
Is the LMH6682MMX pin-compatible with other dual op-amps in VSSOP-8 packages?
No - the LMH6682MMX has a proprietary VSSOP-8 pinout optimized for dual-channel video routing. It is not pin-compatible with generic dual op-amps like TLV272 or OPA2350. Engineers must follow the exact pin mapping shown in Figure 1 of the LMH6682 datasheet (SNOSA43A) to avoid misconnection of supply, inputs, or outputs.
How does the LMH6682MMX handle input overvoltage conditions?
The LMH6682MMX is immune to output phase reversal when input voltages exceed the specified common-mode range - a key reliability feature for video sync pulses or servo control transients. However, absolute maximum ratings prohibit exceeding V+ +0.8V or V− −0.8V at any pin, as doing so risks permanent damage to the internal ESD protection structures.
Can the LMH6682MMX drive a 75Ω video load directly?
Yes - the LMH6682MMX delivers ±85/−80mA output current, enabling direct drive of standard 75Ω video loads. At ±5V supply, it sustains 3.9VPP output swing into 75Ω (measured from rail), meeting SMPTE/ITU-R BT.601 video level requirements. For best stability, TI recommends adding a 33Ω series isolation resistor between OUT and the 75Ω load.
LMH6682MMX 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:
- 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-VSSOP
LMH6682MMX FAQ
1.How can I place an order for LMH6682MMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MMX 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 LMH6682MMX reliable?
The price and inventory of LMH6682MMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MMX is usually 5 days.
3.What payment methods are accepted for LMH6682MMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MMX?
LMH6682MMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MMX 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 LMH6682MMX?
For technical support, including LMH6682MMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MMX requirements.
6.How does Aetrix verify that LMH6682MMX is sourced from the original manufacturer or authorized distributors?
All LMH6682MMX 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 LMH6682MMX meets industry standards.
7.What is the process for return or replacement of LMH6682MMX?
All LMH6682MMX units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MMX, 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 LMH6682MMX part is unused and in its original packaging.
Return procedure for LMH6682MMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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