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Texas Instruments LMH6682MM
- Part No.:
- LMH6682MM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMH6682MM.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,072
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Product details
Overview
LMH6682MM 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 and 0.08° differential phase error at NTSC 3.58MHz - enabling precision composite video amplification in CD/DVD ROM and portable video systems.
For engineers reviewing the LMH6682MM datasheet, LMH6682MM pinout, LMH6682MM application, or LMH6682MM equivalent, this device is selected for demanding analog signal paths requiring wide bandwidth, rail-to-rail output swing (0.8V from rails into 2kΩ), immunity to input overvoltage-induced phase reversal, and low distortion in ADC buffer and current sense configurations.
Technical Context
The LMH6682MM employs a voltage-feedback topology with a class-AB input stage that provides exponential slew-rate enhancement under large differential input voltages - unlike conventional op-amps with saturated Gm limiting. This architecture enables stable operation at gains ≥ +2 and ≤ −1 while maintaining < 42ns settling time (±0.1%, 2VPP).
Its input common-mode range extends 0.5V beyond V− and to within 1.7V of V+, and its output drives ±85/−80mA while swinging to within 0.8V of either supply rail into 2kΩ. Fabricated in TI's VIP10 process, it achieves 190MHz bandwidth with only 6.5mA per channel quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at A = +2, ±5V supply - supports full NTSC/PAL video bandwidth without attenuation. |
| Slew Rate | 940V/μs at ±5V - ensures faithful reproduction of fast video transients and pulse edges. |
| Differential Gain Error | 0.01% at NTSC 3.58MHz - preserves color saturation accuracy across cascaded video stages. |
| Differential Phase Error | 0.08° at NTSC 3.58MHz - maintains precise hue fidelity in composite video signal chains. |
| Supply Current per Channel | 6.5mA typical at ±5V - enables dual-channel high-speed performance with low power overhead. |
| Output Voltage Swing | 0.8V from either rail into 2kΩ - maximizes dynamic range in single-supply video systems. |
| Input Common-Mode Range | Extends 0.5V below V− and to within 1.7V of V+ - supports ground-referenced inputs in single-supply designs. |
Pinout & Package
VSSOP-8 (DGK) package: ultra-miniature 3mm × 3mm surface-mount outline with 0.5mm pitch, optimized for space-constrained portable video and instrumentation PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | High-current, low-distortion output capable of ±85/−80mA drive into 2kΩ load. |
| 2 (−IN A) | Inverting input A | High-impedance node with 4MΩ common-mode input resistance and 1.6pF capacitance. |
| 3 (+IN A) | Non-inverting input A | Supports input signals extending 0.5V below V− - enables true single-supply DC-coupled operation. |
| 4 (V−) | Negative supply | Accepts 0V (single-supply) or −5V; absolute max rating is V− − 0.8V on pins. |
| 5 (+IN B) | Non-inverting input B | Independent channel B input with same CMVR and noise specs as Channel A. |
| 6 (−IN B) | Inverting input B | Matched to Channel A for crosstalk rejection of −78dB at 5MHz. |
| 7 (OUT B) | Channel B output | Fully independent output; identical AC/DC specs and drive capability to OUT A. |
| 8 (V+) | Positive supply | Operates from 3V to 12V total supply; max 12.6V absolute rating; 235°C/W θJA thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Phase reversal immunity | Guaranteed no output polarity inversion when inputs exceed specified common-mode range - eliminates need for external clamping in servo or video front-end protection. |
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures broadcast-grade color fidelity in multi-stage video amplifiers. |
| Class-AB input stage | Exponential transconductance delivers higher slew rate at larger input differentials - improves transient fidelity vs. conventional Gm-saturated op-amps. |
| Rail-to-rail output swing | 0.8V from V+ or V− into 2kΩ - maximizes usable signal swing in 5V or ±5V systems without level-shifting circuitry. |
| Low 100kHz input voltage noise | 12nV/√Hz - minimizes noise contribution in high-gain video gain blocks and precision current-sense buffers. |
Applications
| CD/DVD ROM Video Output | ADC Driver Buffer |
|---|---|
Use Scenario: Amplifying composite video output from optical disc controller ICs before transmission to display interface or encoder. IC Role / Device Role / Timing Role: Dual-channel video gain block providing unity or +2 gain with minimal group delay variation across 0–5MHz. Use Value: 0.01% differential gain error preserves chroma amplitude integrity across multiple playback generations and disc formats. |
Use Scenario: Driving SAR or pipeline ADC inputs with fast-settling, low-distortion analog signals from sensors or signal chains. IC Role / Device Role / Timing Role: High-speed buffer isolating source impedance and delivering full-scale step response within 42ns (±0.1%). Use Value: 940V/μs slew rate and 190MHz bandwidth ensure accurate digitization of >10MHz analog transients without slewing artifacts. |
| Portable Video Signal Chain | Current Sense Amplifier Front-End |
Use Scenario: Signal conditioning in handheld medical imagers or industrial inspection cameras where size, power, and video fidelity are critical. IC Role / Device Role / Timing Role: Dual op-amp implementing DC-coupled video gain and sync clamp functions in compact VSSOP-8 footprint. Use Value: VSSOP-8 package (3mm × 3mm) and 6.5mA/channel current enable battery-powered operation with minimal board area. |
Use Scenario: Amplifying mV-level shunt voltage drops in motor control or power supply monitoring, requiring high CMRR and overload tolerance. IC Role / Device Role / Timing Role: Precision buffer with 84dB CMRR and phase-reversal immunity - prevents latch-up during current fault events. Use Value: Input CMVR extending 0.5V below V− allows direct sensing of low-side shunts referenced to ground in single-supply systems. |
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 | Higher 1.5GHz GBW but lower output drive (±45mA); 12.5mA/ch supply current; SOIC-8 only. | Better for RF IF gain stages; less suitable for video loads >150Ω or high-current ADC driving. | Select LMH6629MA only when bandwidth >500MHz is required and output current <50mA suffices. |
| THS3202D | 1.8GHz GBW, ±120mA output, but requires ±15V supplies; no single-supply operation; SOIC-8. | Targeted at high-fidelity test equipment; incompatible with 3.3V/5V portable systems. | Choose THS3202D for lab-grade signal generation where supply headroom and drive strength outweigh portability constraints. |
Compared with LMH6682MM, LMH6629MA trades video-optimized distortion and phase linearity for raw bandwidth, while THS3202D delivers extreme drive capability at the cost of supply flexibility and power efficiency - making LMH6682MM the optimal balance for portable video and mixed-signal buffer applications.
Availability
LMH6682MM is available at Aetrix Electronics and suitable for CD/DVD ROM video output, ADC driver buffer, and portable video signal chain applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LMH6682MM 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 conditioning.
The LMH6682MM belongs to TI's LMH66xx video op-amp family, engineered specifically for broadcast-quality composite video amplification, ADC buffering, and portable instrumentation where differential gain/phase accuracy, slew rate, and single-supply operability are critical.
FAQ
What is the maximum supply voltage for LMH6682MM?
The LMH6682MM has an absolute maximum supply voltage (V+ − V−) of 12.6V. It operates across a recommended range of 3V to 12V total supply, supporting both single-supply (e.g., 5V, 3.3V) and split-supply (e.g., ±5V) configurations. Exceeding 12.6V risks permanent damage, and operation above 12V is not characterized or guaranteed.
Does LMH6682MM support rail-to-rail input?
No, LMH6682MM 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+, meaning it accepts inputs down to V− − 0.5V but only up to V+ − 1.7V. For example, at ±5V supply, inputs must stay between −5.5V and +3.3V. The LMH6682MM does support rail-to-rail *output* swing (0.8V from rails into 2kΩ).
Is LMH6682MM pin-compatible with LMH6682MA?
Yes, LMH6682MM (VSSOP-8, DGK) and LMH6682MA (SOIC-8, D) share identical pinout and electrical specifications - both are dual op-amps with matching pin assignments (OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, V+). However, their packages differ in footprint and thermal characteristics: VSSOP-8 has 0.5mm pitch and 235°C/W θJA, versus SOIC-8's 1.27mm pitch and 190°C/W θJA.
What is the small-signal settling time of LMH6682MM?
The LMH6682MM achieves 42ns settling time to ±0.1% for a 2VPP step response under non-inverting gain +2 configuration at ±5V supply. This value is measured at TA = 25°C with RL = 100Ω and reflects its optimized voltage-feedback architecture and class-AB input stage - critical for high-fidelity video and fast data acquisition systems.
Can LMH6682MM drive a 75Ω video load directly?
Yes, LMH6682MM can drive a 75Ω load, delivering ±40mA output current and maintaining 3.75V to 4.15V high swing and −4.00V to −3.70V low swing at ±5V supply. However, differential gain/phase specs (0.01%/0.08°) are characterized into 150Ω; for 75Ω, DG/DP degrade slightly (to ~0.03%/0.05° per datasheet Table 1), and output swing reduces by ~150mV. A series 75Ω termination resistor is recommended for impedance-matched video distribution.
LMH6682MM 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
LMH6682MM FAQ
1.How can I place an order for LMH6682MM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6682MM 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 reliable?
The price and inventory of LMH6682MM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6682MM is usually 5 days.
3.What payment methods are accepted for LMH6682MM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6682MM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6682MM?
LMH6682MM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6682MM 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?
For technical support, including LMH6682MM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6682MM requirements.
6.How does Aetrix verify that LMH6682MM is sourced from the original manufacturer or authorized distributors?
All LMH6682MM 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 meets industry standards.
7.What is the process for return or replacement of LMH6682MM?
All LMH6682MM units undergo pre-shipment inspection (PSI). If there is an issue with LMH6682MM, 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 part is unused and in its original packaging.
Return procedure for LMH6682MM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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