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Texas Instruments LMH6682MMX/NOPB
- Part No.:
- LMH6682MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6682MMX/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,486
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Product details
Overview
LMH6682MMX/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 - enabling precision composite video amplification in portable and embedded video interfaces.
For engineers reviewing the LMH6682MMX/NOPB datasheet, LMH6682MMX/NOPB pinout, LMH6682MMX/NOPB application, or LMH6682MMX/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−, and immunity to phase reversal under input overdrive - all critical for stable operation in ADC buffer, current-sense, and portable communications signal chains.
Technical Context
The LMH6682MMX/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 amplitudes without saturation. This architecture directly supports wideband video fidelity by maintaining linear settling and low distortion across 0–100MHz.
Its input stage operates with common-mode voltage range from −5.5V to +3.3V (±5V supply) and features no phase reversal when inputs exceed rated range; the output stage drives ±85/−80mA while swinging within 0.8V of either rail into 2kΩ - making it suitable for driving 75Ω or 150Ω video loads with minimal gain/phase error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at A = +2 (±5V); enables full NTSC/PAL baseband video amplification without attenuation |
| Slew Rate | 940V/μs (±5V); supports clean 2VPP pulse response with ≤42ns settling to ±0.1% |
| Differential Gain Error | 0.01% (NTSC 3.58MHz, RL = 150Ω); preserves color saturation accuracy in cascaded video stages |
| Differential Phase Error | 0.08° (NTSC 3.58MHz, RL = 150Ω); maintains hue fidelity across DC-coupled video signal paths |
| Input Common-Mode Range | Extends 0.5V below V− and 1.7V from V+ (±5V); allows direct interfacing with ground-referenced sensors or DAC outputs |
| Output Voltage Swing | 0.8V from rails into 2kΩ; provides >4VPP dynamic range on ±5V supplies for high-fidelity analog buffering |
| Supply Current per Channel | 6.5mA (typical, no load); balances speed and power efficiency for battery-powered portable video systems |
Pinout & Package
VSSOP-8 (DGK) package: ultra-miniature 3mm × 3mm surface-mount footprint with 0.65mm lead pitch, optimized for space-constrained portable video and instrumentation PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | Capable of sourcing +85mA / sinking −80mA; requires local 0.1μF bypass capacitor to V− |
| 2 (−IN A) | Inverting input A | High-impedance node; sensitive to layout parasitics - must be routed away from noisy traces |
| 3 (+IN A) | Non-inverting input A | Supports input common-mode down to −5.5V; connects to reference or sensor signal source |
| 4 (V−) | Negative supply rail | Return path for both channels; must be low-impedance with dedicated ground plane connection |
| 5 (+IN B) | Non-inverting input B | Independent channel input; shares same input stage architecture and CMVR as Channel A |
| 6 (−IN B) | Inverting input B | Matches Channel A performance; used for differential or independent signal conditioning |
| 7 (OUT B) | Channel B output | Electrically identical to OUT A; cross-talk rejection ≥78dB at 5MHz ensures channel isolation |
| 8 (V+) | Positive supply rail | Accepts 3V to 12V total supply range; decoupling required within 5mm of pin using 0.1μF + 4.7μF |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal under input overdrive | Outputs clamp safely at supply rails when inputs exceed −5.5V to +3.3V range - eliminates need for external clamping diodes in servo or current-sense applications |
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures color fidelity in multi-stage video amplifiers without calibration |
| Rail-to-rail output swing | Swings to within 0.8V of V+ or V− into 2kΩ - maximizes dynamic range for ±5V or +5V/0V systems |
| Class-AB input stage | Delivers exponential slew current vs. input differential voltage - sustains 940V/μs at full 6VPP output swing |
| Low 12nV/√Hz input noise | At 100kHz enables high-SNR buffering of low-level video or sensor signals without added noise degradation |
Applications
| Composite Video Amplifier | ADC Driver |
|---|---|
|
Use Scenario: Amplifying NTSC/PAL composite video signals between decoder IC and display driver or recording interface. IC Role / Device Role / Timing Role: Dual-channel video buffer providing gain-of-two amplification with DC coupling and minimal group delay variation. Use Value: 0.01% differential gain and 0.08° differential phase preserve color accuracy across full 0–4.2MHz video bandwidth without post-amplifier correction. |
Use Scenario: Driving SAR or pipeline ADC inputs with fast-settling, low-distortion analog signals from sensors or signal generators. IC Role / Device Role / Timing Role: High-speed unity-gain stable buffer isolating source impedance from ADC sampling capacitor. Use Value: 42ns ±0.1% settling time and −82dBc 3rd-harmonic distortion at 5MHz ensure accurate digitization of transient-rich waveforms. |
| Portable Communications Front-End | Current-Sense Signal Conditioning |
|
Use Scenario: Signal conditioning in handheld test equipment or wireless baseband modules requiring wideband analog processing. IC Role / Device Role / Timing Role: Dual-channel gain block for I/Q baseband paths with matched AC response and low crosstalk. Use Value: ≥78dB channel-to-channel crosstalk rejection at 5MHz prevents interference between parallel signal paths in compact RF subsystems. |
Use Scenario: Amplifying millivolt-level shunt resistor voltages in motor control or power supply monitoring circuits. IC Role / Device Role / Timing Role: Precision current-sense amplifier with rail-to-rail input and output for bidirectional sensing. Use Value: Input common-mode range extending 0.5V below V− enables direct connection to low-side shunts referenced to ground or negative rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher 1.5GHz GBW but lower output drive (±45mA); 2.2nV/√Hz noise vs. LMH6682MMX/NOPB's 12nV/√Hz | Better suited for low-noise preamp stages than video line drivers due to limited output current | Select LMH6629MA/NOPB only when bandwidth >500MHz is required and load <100Ω is not present |
| THS3202DGNR | 1.8GHz GBW, ±120mA output, but requires ±15V supplies; no input rail-to-rail capability (CMVR = ±10V) | Designed for high-voltage test equipment, not portable single-supply video systems | Choose THS3202DGNR only for fixed-line industrial instrumentation with bipolar ±12V–±15V rails |
Compared with LMH6682MMX/NOPB, LMH6629MA/NOPB trades video-grade DG/DP and output drive for ultra-low noise and higher bandwidth, while THS3202DGNR offers greater output current at the cost of supply flexibility and input range - making LMH6682MMX/NOPB uniquely balanced for portable, single-supply video and precision analog front-ends.
Availability
LMH6682MMX/NOPB is available at Aetrix Electronics and suitable for composite video amplification, ADC buffering, portable communications signal conditioning, and current-sense applications requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for LMH6682MMX/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 op-amps and video signal chain solutions.
The LMH6682MMX/NOPB belongs to TI's LMH video op-amp family, engineered specifically for NTSC/PAL composite video systems where differential gain/phase accuracy, wide bandwidth, and robust input/output voltage ranges are mandatory.
FAQ
What is the operating temperature range for the LMH6682MMX/NOPB?
The LMH6682MMX/NOPB is specified for continuous operation from −40°C to +85°C ambient temperature. This industrial-grade range is validated across all key AC and DC parameters including bandwidth, slew rate, differential gain/phase, and output swing - ensuring reliable performance in portable video equipment and embedded instrumentation deployed in variable thermal environments. The LMH6682MMX/NOPB maintains its 190MHz −3dB bandwidth and 0.01% DG specification across this full range.
Does the LMH6682MMX/NOPB support single-supply operation?
Yes, the LMH6682MMX/NOPB supports true single-supply operation from 3V to 12V total supply range. Its input common-mode voltage extends 0.5V beyond V− and up to 1.7V from V+, while the output swings within 0.8V of either rail into 2kΩ - enabling direct interfacing with ground-referenced sources (e.g., DACs, sensors) and termination into 75Ω video loads without level-shifting circuitry. This capability is confirmed in both 5V and ±5V electrical characteristics tables.
What package type is used for the LMH6682MMX/NOPB?
The LMH6682MMX/NOPB uses the VSSOP-8 (DGK) package: a miniature 3mm × 3mm surface-mount outline with 0.65mm lead pitch and exposed thermal pad. This package is RoHS-compliant, lead-finished with matte tin, and rated MSL Level-1 (260°C peak reflow). It is distinct from the SOIC-8 variant (LMH6682MA/NOPB) and optimized for high-density portable video PCB layouts where board space and thermal performance are critical.
How does the LMH6682MMX/NOPB handle input overvoltage conditions?
The LMH6682MMX/NOPB is explicitly designed to be immune to output phase reversal when input voltages exceed the specified common-mode range (−5.5V to +3.3V at ±5V supplies). Under such overdrive, the output clamps predictably at the nearest supply rail rather than inverting polarity - eliminating risk of latch-up or system instability in servo loops or current-sense circuits. This behavior is documented in the Applications section and verified across temperature and supply conditions.
What is the typical supply current consumption of the LMH6682MMX/NOPB?
The LMH6682MMX/NOPB draws 6.5mA per channel under no-load conditions at 25°C (±5V supplies), totaling 13mA for both amplifiers. This quiescent current remains stable across the full −40°C to +85°C operating range and varies less than ±10% with supply voltage from 3V to 12V. The low power-per-performance ratio - 6.5mA supporting 190MHz bandwidth and 940V/μs slew rate - makes it especially suitable for battery-powered portable video and communications devices.
LMH6682MMX/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
LMH6682MMX/NOPB FAQ
1.How can I place an order for LMH6682MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MMX/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 LMH6682MMX/NOPB reliable?
The price and inventory of LMH6682MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6682MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MMX/NOPB?
LMH6682MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MMX/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 LMH6682MMX/NOPB?
For technical support, including LMH6682MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MMX/NOPB requirements.
6.How does Aetrix verify that LMH6682MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6682MMX/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 LMH6682MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6682MMX/NOPB?
All LMH6682MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MMX/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 LMH6682MMX/NOPB part is unused and in its original packaging.
Return procedure for LMH6682MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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