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Texas Instruments LMH6682MAX/NOPB
- Part No.:
- LMH6682MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6682MAX/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
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Product details
Overview
LMH6682MAX/NOPB from Texas Instruments is a high-speed dual 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 CD/DVD players and portable video interfaces.
For engineers reviewing the LMH6682MAX/NOPB datasheet, LMH6682MAX/NOPB pinout, LMH6682MAX/NOPB application, or LMH6682MAX/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 validated across −40°C to +85°C.
Technical Context
The LMH6682MAX/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 low quiescent current (6.5mA per channel) without sacrificing speed.
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 ±85/−80mA into loads while delivering 0.1dB gain flatness up to 25MHz and 1° linear phase deviation to 40MHz.
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 (A = +2, ±5V) - enables clean 2VPP pulse response with <42ns settling to ±0.1% |
| Differential Gain Error | 0.01% (NTSC 3.58MHz, RL = 150Ω) - preserves color saturation fidelity in cascaded video amplifiers |
| Differential Phase Error | 0.08° (NTSC 3.58MHz, RL = 150Ω) - minimizes hue shift across DC operating points |
| Input Common-Mode Range | −5.5V to +3.3V (±5V supply) - allows ground-referenced inputs in single-supply video systems |
| Output Voltage Swing | 0.8V from either rail into 2kΩ - delivers >4VPP dynamic range on ±5V supplies |
| Supply Current | 6.5mA per channel - balances speed and power for portable video applications |
Pinout & Package
LMH6682MAX/NOPB is housed in an 8-pin SOIC (D) package with standard dual op-amp pinout. The package features gull-wing leads, 1.27mm pitch, and JEDEC MS-012AC dimensions (4.9mm × 3.91mm × 1.75mm). Thermal resistance θJA is 190°C/W on a 2-layer board with 1-in² copper pour.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | Differential input node for first amplifier; accepts signals within −5.5V to +3.3V common-mode range |
| 2 | Non-Inverting Input (Channel A) | High-impedance input (RIN = 4MΩ) with 1.6pF capacitance; enables unity-gain stable configurations |
| 3 | Output (Channel A) | Capable of ±85/−80mA drive into resistive loads; clamps safely during overload without phase reversal |
| 4 | V− (Ground or Negative Supply) | Reference for both channels; supports single-supply (0V) or split-supply (−5V) operation |
| 5 | Non-Inverting Input (Channel B) | Independent second amplifier input; identical specs and layout symmetry to Channel A |
| 6 | Inverting Input (Channel B) | Second differential input; cross-talk rejection >77dB at 5MHz ensures channel isolation |
| 7 | Output (Channel B) | Fully buffered output with same drive strength and rail-swing capability as Channel A |
| 8 | V+ (Positive Supply) | Accepts 3V–12V total supply range; operates down to 3V for low-power portable designs |
Key Features
| Feature | Design Value |
|---|---|
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures color accuracy in multi-stage video amplifiers |
| Phase reversal immunity | Output remains clamped at rail during input overvoltage - eliminates need for external protection in servo or sensor front-ends |
| Rail-to-rail output swing | 0.8V from V+ or V− into 2kΩ enables maximum signal headroom in ±5V or +5V/0V systems |
| Class-AB input stage | Exponential Gm response delivers higher slew rate at large differential inputs - improves transient fidelity vs. classical op-amps |
| Low distortion in inverting mode | THD = −63dBc @5MHz (2VPP, RL = 2kΩ) - optimal for ADC buffer and current-sense applications requiring linearity |
Applications
| CD/DVD Video Output Stage | ADC Driver for High-Speed Sampling |
|---|---|
|
Use Scenario: Amplifying composite video signals from DVD decoder ICs before transmission to analog RGB or CVBS outputs. IC Role / Device Role / Timing Role: Final-stage video buffer providing gain, impedance matching, and DC restoration interface. Use Value: 0.01% differential gain error preserves chroma amplitude integrity across brightness levels, preventing color desaturation in consumer displays. |
Use Scenario: Driving the input of 10-bit+ SAR or pipeline ADCs sampling at ≥10MSPS in test equipment or imaging systems. IC Role / Device Role / Timing Role: Low-noise, fast-settling buffer isolating ADC input from source impedance variations. Use Value: 42ns ±0.1% settling time and −63dBc THD ensure accurate digitization of fast-rising video or sensor waveforms without aperture uncertainty. |
| Portable Video Interface | Current Sense Amplifier Front-End |
|
Use Scenario: Level-shifting and buffering camera sensor outputs (e.g., CMOS image sensors) in battery-powered tablets or camcorders. IC Role / Device Role / Timing Role: Single-supply (3V–5V) video amplifier supporting rail-to-rail input and output swing. Use Value: Input common-mode range extends 0.5V below V− (0V), enabling direct connection to ground-referenced sensor outputs without level-shift circuitry. |
Use Scenario: Amplifying mV-level shunt voltage drops in motor control or power supply monitoring circuits. IC Role / Device Role / Timing Role: Precision, high-bandwidth difference amplifier with low offset drift (±2μV/°C). Use Value: 6.5mA supply current and 12nV/√Hz input noise support accurate, low-power current measurement at frequencies up to 10MHz. |
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 bandwidth (1.5GHz), lower noise (2.9nV/√Hz), but 15mA/channel supply current and no DG/DP characterization | Targeted at RF/IF signal chains, not video; lacks NTSC/PAL validation and phase reversal immunity | Select when ultra-wideband small-signal gain is required; avoid for video where DG/DP and overload behavior are critical |
| THS3202D | Similar 190MHz BW and 0.02% DG, but only specified for ±15V operation and lacks single-supply input range | Designed for professional video infrastructure (e.g., broadcast gear); incompatible with 3V–5V portable systems | Prefer for fixed-line video equipment with ±15V rails; LMH6682MAX/NOPB is superior for battery-powered or mixed-supply designs |
Compared with LMH6629MA/NOPB and THS3202D, LMH6682MAX/NOPB uniquely combines video-grade differential gain/phase specs, single-supply operability (3V–12V), and guaranteed phase reversal immunity - making it the only choice for cost-sensitive, portable, or multi-standard video signal conditioning where color fidelity and robustness under overdrive are mandatory.
Availability
LMH6682MAX/NOPB is available at Aetrix Electronics and suitable for CD/DVD video output stages, portable video interfaces, and high-speed ADC driver applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMH6682MAX/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 digital signal technologies, with decades of expertise in high-performance op-amps and video signal conditioning solutions.
The LMH6682MAX/NOPB belongs to TI's LMH66xx video op-amp family, engineered specifically for NTSC/PAL composite video amplification, offering guaranteed differential gain/phase performance, phase reversal immunity, and rail-swing capability to simplify design in consumer and portable video systems.
FAQ
What is the guaranteed differential gain and phase performance of LMH6682MAX/NOPB?
The LMH6682MAX/NOPB is characterized for 0.01% differential gain error and 0.08° differential phase error at NTSC 3.58MHz under ±5V supply conditions with a 150Ω load. These values are tested and ensured across temperature (−40°C to +85°C) and represent industry-leading video fidelity for dual op-amps. This performance is explicitly validated in the official TI datasheet SNOSA43A and makes LMH6682MAX/NOPB suitable for multi-stage video amplifiers where cumulative DG/DP errors must remain below 0.1%.
Does LMH6682MAX/NOPB support true single-supply operation with input signals near ground?
Yes. LMH6682MAX/NOPB supports input common-mode voltages down to −0.5V (with V− = 0V) and up to +3.3V, enabling direct interfacing with ground-referenced video sources or sensors without level-shifting circuitry. This is achieved via its extended-input-range input stage, confirmed in the ±5V Electrical Characteristics table (CMVR = −5.5V to +3.3V) and validated across the full operating temperature range. LMH6682MAX/NOPB maintains full AC performance within this range.
What is the maximum safe continuous output short-circuit duration for LMH6682MAX/NOPB?
LMH6682MAX/NOPB allows infinite continuous output short-circuit duration only when total supply voltage (V+ − V−) is less than 6V at room temperature or below. For supplies above 6V (e.g., ±5V = 10V), the allowable short-circuit duration is limited to 1.5ms per event to prevent junction temperature exceedance. This specification is documented in the Absolute Maximum Ratings section of the TI datasheet SNOSA43A and applies identically to LMH6682MAX/NOPB due to its SOIC-8 thermal profile (θJA = 190°C/W).
Can LMH6682MAX/NOPB drive 75Ω video loads directly?
LMH6682MAX/NOPB can drive 75Ω loads, delivering 3.5V to 4.15V output swing high and 885mV to 1.25V low (±5V supply), but output current is limited to ±45mA typical. For sustained 1VPP into 75Ω (requiring ~13.3mA peak), it operates well within spec. However, for full 2VPP compliance, a series 22Ω isolation resistor is recommended to maintain stability and minimize distortion - consistent with TI's guidance in the "Driving Capacitive Loads" section of SNOSA43A. LMH6682MAX/NOPB's output stage is optimized for 150Ω and 2kΩ, not 75Ω.
Is LMH6682MAX/NOPB pin-compatible with other dual op-amps in SOIC-8 packages?
LMH6682MAX/NOPB uses the industry-standard dual op-amp pinout (pin 1 = CHA−, pin 2 = CHA+, pin 3 = CHAOUT, pin 4 = V−, pin 5 = CHB+, pin 6 = CHB−, pin 7 = CHBOUT, pin 8 = V+), matching TL082, NE5532, and OPA2350. However, electrical compatibility is not guaranteed: LMH6682MAX/NOPB requires careful attention to supply decoupling (0.1μF ceramic + 4.7μF tantalum per supply pin), has different stability criteria (stable at gains ≥ +2), and exhibits distinct input/output voltage ranges. Direct replacement without circuit review is not advised.
LMH6682MAX/NOPB 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:
- 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
LMH6682MAX/NOPB FAQ
1.How can I place an order for LMH6682MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MAX/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 LMH6682MAX/NOPB reliable?
The price and inventory of LMH6682MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6682MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MAX/NOPB?
LMH6682MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MAX/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 LMH6682MAX/NOPB?
For technical support, including LMH6682MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MAX/NOPB requirements.
6.How does Aetrix verify that LMH6682MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6682MAX/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 LMH6682MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6682MAX/NOPB?
All LMH6682MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MAX/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 LMH6682MAX/NOPB part is unused and in its original packaging.
Return procedure for LMH6682MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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