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Texas Instruments LMH6683MA/NOPB
- Part No.:
- LMH6683MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6683MA/NOPB.pdf
- Description:
- IC OPAMP VFB 3 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,993
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Product details
Overview
LMH6683MA/NOPB from Texas Instruments is a triple high-speed voltage-feedback operational amplifier optimized for video signal conditioning in single- or dual-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, portable video systems, and ADC buffer stages.
For engineers reviewing the LMH6683MA/NOPB datasheet, LMH6683MA/NOPB pinout, LMH6683MA/NOPB application, or LMH6683MA/NOPB equivalent, key selection criteria include its rail-to-rail output swing (0.8V from rails into 2kΩ), input common-mode range extending 0.5V beyond V− and to within 1.7V of V+, low 12nV/√Hz input voltage noise at 100kHz, and immunity to output phase reversal under input overdrive.
Technical Context
The LMH6683MA/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-input op amps. Its VIP10 silicon process ensures high speed-to-quiescent-current efficiency.
Designed specifically for video, it maintains tight differential gain (±0.01% typ.) and phase (±0.08° typ.) across temperature and load, supports stable operation at gains ≥+2 and ≤−1, and features output drive capability of +85/−80mA into loads down to 75Ω while maintaining 0.1dB gain flatness to 25MHz.
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 at ±5V - enables clean 2VPP pulse response without slewing distortion at >10MHz |
| Differential Gain Error | 0.01% typ. (NTSC 3.58MHz, RL = 150Ω) - preserves color saturation accuracy in cascaded video chains |
| Differential Phase Error | 0.08° typ. (NTSC 3.58MHz, RL = 150Ω) - minimizes hue shift across luminance/chrominance components |
| Input Common-Mode Range | Extends 0.5V below V− and to within 1.7V of V+ - allows direct interface to single-supply video DACs and sensors |
| Output Voltage Swing | 0.8V from either rail into 2kΩ - maximizes dynamic range in 5V or ±5V systems with minimal headroom loss |
| Supply Current per Channel | 6.5mA typical (no load, ±5V) - balances high-speed performance with power efficiency in portable designs |
Pinout & Package
LMH6683MA/NOPB is housed in a 14-pin SOIC (SOIC-14) package with standard 1.27mm pitch, 8.65mm × 3.91mm body, and exposed pad not present. Thermal resistance θJA = 145°C/W on 2-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp 1) | High-impedance node for feedback configuration; supports DC-coupled or AC-coupled inputs |
| 2 | Non-Inverting Input (Amp 1) | Accepts video signal source or reference; CMVR extends 0.5V below V− |
| 3 | Output (Amp 1) | Capable of ±85/−80mA drive into 75Ω; swings within 0.8V of rails into 2kΩ |
| 4 | V− (GND for single supply) | Power return; must be low-impedance path; decoupling capacitor required near pin |
| 5 | Inverting Input (Amp 2) | Independent channel input; identical specs to Pin 1 |
| 6 | Non-Inverting Input (Amp 2) | Independent channel input; identical specs to Pin 2 |
| 7 | Output (Amp 2) | Independent channel output; identical drive and swing specs to Pin 3 |
| 8 | Output (Amp 3) | Third independent output; shares same electrical specs and thermal limits as Pins 3 and 7 |
| 9 | Non-Inverting Input (Amp 3) | Third channel positive input; identical CMVR and bias specs to Pins 2 and 6 |
| 10 | Inverting Input (Amp 3) | Third channel negative input; identical impedance and noise specs to Pins 1 and 5 |
| 11 | V+ | Positive supply rail; supports 3V to 12V total supply range (V+ − V−); requires local 0.1μF ceramic decoupling |
| 12 | NC | No connect - internally unused; must remain unconnected per datasheet |
| 13 | NC | No connect - internally unused; must remain unconnected per datasheet |
| 14 | NC | No connect - internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Phase reversal immunity | Guaranteed non-inverting output behavior even when inputs exceed specified common-mode range - eliminates need for external clamping in servo or video sync circuits |
| Video-optimized AC performance | 0.01% DG / 0.08° DP at NTSC 3.58MHz ensures color fidelity in multi-stage analog video paths without calibration |
| Rail-to-rail compatible output | Swings to within 0.8V of V+ or V− into 2kΩ - maximizes usable signal swing in 5V systems without level-shifting circuitry |
| High closed-loop stability | Stable at gains ≥+2 and ≤−1 without external compensation - simplifies design of gain blocks and inverting video buffers |
| Low 100kHz input voltage noise | 12nV/√Hz enables high-SNR buffering of low-level video signals without degrading SNR in downstream ADC stages |
Applications
| CD/DVD Video Output Stage | ADC Front-End Buffer |
|---|---|
Use Scenario: Amplifying composite video output from DVD decoder IC before transmission to RCA connector or internal display driver. IC Role / Device Role / Timing Role: Final-stage video driver providing gain, DC restoration, and 75Ω line driving capability. Use Value: 0.01% differential gain error preserves chroma amplitude accuracy across brightness levels, preventing color desaturation in consumer playback. |
Use Scenario: Buffering high-speed analog sensor or video signal prior to sampling by 10–12-bit ADC in portable instrumentation. IC Role / Device Role / Timing Role: Low-noise, fast-settling (42ns to ±0.1%) gain block isolating ADC input from source impedance variations. Use Value: 940V/μs slew rate and 190MHz bandwidth prevent distortion on 5MHz+ video or sensor waveforms during acquisition window. |
| Portable Video System Amplifier | Current Sense Signal Conditioning |
Use Scenario: Driving small LCD or OLED panel video lines in battery-powered camcorders or handheld media players. IC Role / Device Role / Timing Role: Triple-channel video amplifier supporting RGB or YUV signal paths with independent gain control. Use Value: 6.5mA/channel quiescent current enables three-channel video amplification within tight 20mA total system budget. |
Use Scenario: Amplifying mV-level shunt voltage in motor control or power supply monitoring, requiring wide bandwidth and rail-compatible input. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with extended input common-mode range (to 0.5V below ground). Use Value: Input CMVR extending below V− allows direct sensing of high-side current sources without level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6682MA/NOPB | Dual-channel version in SOIC-8; identical AC specs (190MHz BW, 940V/μs), same DG/DP, but only two amplifiers per package | Used where only two video or buffer channels are needed; saves board space vs. triple-channel requirement | Select LMH6682MA/NOPB when system layout or BOM count favors dual-channel consolidation; no change in schematic design rules |
| THS3201DR | Single-channel, 1.8GHz GBW, 6000V/μs slew rate; higher power (12.5mA/ch), no DG/DP characterization; not video-optimized | Suitable for ultra-wideband RF or pulse applications, not NTSC/PAL video due to lack of differential gain/phase validation | Choose THS3201DR only for non-video, high-frequency signal paths where video fidelity metrics are irrelevant |
Compared with LMH6683MA/NOPB, LMH6682MA/NOPB reduces channel count but retains identical video-grade AC performance and phase reversal immunity, while THS3201DR trades video-specific optimization for raw speed and bandwidth at significantly higher power and cost - making it unsuitable for color-accurate video signal chains.
Availability
LMH6683MA/NOPB is available at Aetrix Electronics and suitable for CD/DVD video output stages, portable video system amplifiers, and ADC front-end buffers requiring stable component supply, long-term industrial lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LMH6683MA/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 connectivity technologies, with decades of expertise in high-performance op amp design and video signal chain solutions.
The LMH6683MA/NOPB belongs to TI's LMH66xx high-speed video op amp family, engineered specifically for composite video amplification, ADC buffering, and portable multimedia systems demanding precision differential gain/phase, rail-compatible operation, and robust overload behavior.
FAQ
What is the maximum supply voltage range supported by the LMH6683MA/NOPB?
The LMH6683MA/NOPB operates across a total supply voltage range of 3V to 12V (V+ − V−). It is fully characterized at ±5V (10V total) and 5V single supply (V− = GND). Absolute maximum rating is 12.6V; exceeding this risks permanent damage. For reliable operation in industrial environments, TI specifies −40°C to +85°C ambient temperature with derated power dissipation above 70°C.
Does the LMH6683MA/NOPB require external compensation for unity-gain stability?
No, the LMH6683MA/NOPB is not unity-gain stable. It is optimized for minimum stable gain of +2 (non-inverting) or −1 (inverting). Attempting unity-gain configuration will cause peaking or oscillation. For gains < +2, external compensation (e.g., feedback capacitor) is required - refer to Figure 54 in the datasheet for resistor value guidance to minimize peaking.
Can the LMH6683MA/NOPB drive a 75Ω video load directly?
Yes, the LMH6683MA/NOPB can drive a 75Ω load directly, delivering ±40mA output current at 1V from either rail. Measured output swing into 75Ω is 3.75VPP (high) and −3.50V (low) at ±5V supply - sufficient for standard 1VPP composite video. However, differential gain/phase specs (0.01%/0.08°) are validated at 150Ω; 75Ω loading increases distortion slightly but remains within broadcast-grade tolerance.
How does the LMH6683MA/NOPB handle input overvoltage conditions?
The LMH6683MA/NOPB is immune to output phase reversal when inputs exceed the specified common-mode range - a critical feature for video sync pulses and servo control. Under overdrive, the output clamps predictably near the supply rail rather than inverting. However, absolute maximum input differential voltage is ±2.5V; exceeding this may damage the input stage MOS gates.
Is the LMH6683MA/NOPB pin-compatible with other triple op amps like the LM358 or TL074?
No, the LMH6683MA/NOPB is not pin-compatible with legacy general-purpose op amps such as LM358 or TL074. Its SOIC-14 pinout is unique: Pins 12–14 are NC (no connect), and channel ordering differs (Amp 1: Pins 1–3; Amp 2: Pins 5–7; Amp 3: Pins 8–10). Substitution requires PCB layout revision and validation of bandwidth, noise, and drive capability differences.
LMH6683MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 3
- 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 (x3 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:
- 14-SOIC
LMH6683MA/NOPB FAQ
1.How can I place an order for LMH6683MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6683MA/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 LMH6683MA/NOPB reliable?
The price and inventory of LMH6683MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6683MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6683MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6683MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6683MA/NOPB?
LMH6683MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6683MA/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 LMH6683MA/NOPB?
For technical support, including LMH6683MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6683MA/NOPB requirements.
6.How does Aetrix verify that LMH6683MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6683MA/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 LMH6683MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6683MA/NOPB?
All LMH6683MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6683MA/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 LMH6683MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6683MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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