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Texas Instruments LMH6639MFX
- Part No.:
- LMH6639MFX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
LMH6639MFX.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,596
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Product details
Overview
LMH6639MFX from Texas Instruments is a 190MHz rail-to-rail output voltage-feedback operational amplifier with shutdown control, 3.6mA supply current (enabled), 400μA in shutdown mode, and 110mA linear output drive capability. It operates from 3V to 12V single supply or ±5V dual supply and is used as a high-speed buffer in video signal chains, ADC drivers, and active filter stages.
For engineers reviewing the LMH6639MFX datasheet, LMH6639MFX pinout, LMH6639MFX application, or LMH6639MFX equivalent, key selection criteria include its 190MHz −3dB bandwidth at AV = +1 (5V), 33ns settling time (±0.1%), rail-to-rail output swing within 40mV of rails, shutdown isolation of −70dB at 1MHz, and input common-mode range extending to −0.2V below V− and within 1V of V+.
Technical Context
The LMH6639MFX employs TI's VIP10 process to achieve high speed with low power. Its voltage-feedback architecture delivers stable operation at gains ≥ +1, including unity gain, with no phase reversal over full input common-mode range. The internal shutdown logic responds to SD pin voltage relative to V+, enabling robust interface with 3V/5V logic.
Input protection includes anti-parallel diodes and series resistors limiting differential input voltage to ±2.5V; output stage supports rail-to-rail swing with <30mV saturation voltage under 110mA load. Closed-loop output resistance is 266mΩ at 1MHz, ensuring minimal gain error into reactive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 190MHz at AV = +1, 5V supply - enables baseband video and high-speed data acquisition without gain peaking. |
| Settling Time | 33ns to ±0.1% - supports multiplexed sampling at >10 MSPS with minimal droop or overshoot. |
| Output Swing | Within 40mV of either rail at 5V supply - maximizes dynamic range in low-voltage systems (e.g., portable video). |
| Supply Current | 3.6mA enabled / 400μA disabled - reduces system power by >90% during idle periods in battery-powered designs. |
| Input CMVR | −0.2V to 4V (5V supply) - allows direct interfacing to ground-referenced sensors and DACs without level-shifting. |
| Total Harmonic Distortion | −60dBc at 5MHz, 2VPP - meets NTSC/PAL video fidelity requirements for differential gain (0.12%) and phase (0.045°). |
| Slew Rate | 172V/μs - sustains full-scale transitions at >28MHz full-power bandwidth, critical for pulse and composite video signals. |
Pinout & Package
SOT-23-6 package: ultra-compact 2.9mm × 1.6mm footprint with 0.95mm pitch, optimized for space-constrained portable and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply Rail | Accepts 3V–12V single supply or +5V in dual-supply configuration; powers internal bias and output stage. |
| 2 (−IN) | Inverting Input | Differential input node; protected by series resistor and anti-parallel ESD diodes to V+ and V−. |
| 3 (+IN) | Non-Inverting Input | Differential input node; same protection structure as −IN; supports CMVR down to −0.2V below V−. |
| 4 (V−) | Negative Supply Rail | Ground reference in single supply; −5V in dual supply; defines lower output swing limit and input common-mode floor. |
| 5 (OUT) | Amplifier Output | Rail-to-rail capable output driving up to 110mA; high-Z in shutdown mode; requires external pull-down if left floating. |
| 6 (SD) | Shutdown Control Input | Active-low logic input referenced to V+; threshold ≈ V+ − 1.65V; 83ns turn-on delay ensures clean signal gating. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 4.9VPP output from 5V supply, preserving SNR in low-voltage ADC front-ends. |
| Shutdown isolation | −70dB at 1MHz ensures minimal crosstalk between channels in multiplexed video/audio systems. |
| No output phase reversal | Eliminates signal inversion artifacts when input exceeds CMVR - critical for sensor interfaces with wide offset ranges. |
| Anti-parallel input protection | Prevents latch-up and damage during overvoltage transients or shutdown-induced input mismatches. |
| Optimized for unity-gain stability | Guaranteed stable operation at AV = +1 without external compensation - simplifies layout in buffer applications. |
Applications
| Active Video Filtering | ADC Input Buffering |
|---|---|
Use Scenario: Filtering composite NTSC video signals before digitization in set-top boxes or portable media players. IC Role / Device Role / Timing Role: Unity-gain buffer with 0.12% differential gain and 0.045° differential phase correction. Use Value: Maintains broadcast-grade color fidelity while rejecting high-frequency noise above 5.5MHz. | Use Scenario: Driving SAR or pipeline ADC inputs in high-speed data acquisition systems. IC Role / Device Role / Timing Role: Low-output-impedance buffer isolating source impedance from ADC sampling capacitor. Use Value: 33ns settling ensures <0.1% error at 10MSPS sampling rates, eliminating aperture jitter penalties. |
| Current Sense Amplification | Portable Video Signal Routing |
Use Scenario: Amplifying mV-level shunt voltage in motor control or power supply monitoring circuits. IC Role / Device Role / Timing Role: High-precision, low-offset amplifier with rail-to-rail output for direct microcontroller ADC interfacing. Use Value: −0.2V to 4V input range accepts bidirectional current sensing across 0V reference without level shifters. | Use Scenario: Switching between camera and display video paths in smartphones or tablets using shutdown-controlled multiplexing. IC Role / Device Role / Timing Role: Fast-switching op-amp with 83ns TON and 160ns TOFF enabling seamless video source handover. Use Value: −70dB off-isolation prevents ghosting or bleed-through between active and inactive video channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6642MF/NOPB | Higher 280MHz bandwidth, 5.5mA supply current, SOIC-8 only - no SOT-23-6 option. | Better suited for >200MHz RF IF amplification; less optimal for space-constrained portable designs. | Select when bandwidth >220MHz is required and board area permits SOIC-8. |
| THS3201DBVR | Current-feedback architecture, 1.8GHz bandwidth, 12mA supply current, 110mA output - no shutdown pin. | Superior slew rate (4700V/μs) for pulse amplification; lacks enable/disable control for power-gated systems. | Choose for ultra-high-speed pulse applications where shutdown functionality is not needed. |
Compared with LMH6639MFX, LMH6642MF/NOPB trades higher power for greater bandwidth and THS3201DBVR sacrifices shutdown control for extreme slew performance - LMH6639MFX uniquely balances speed, low power, rail-to-rail output, and integrated disable in SOT-23-6.
Availability
LMH6639MFX is available at Aetrix Electronics and suitable for active video filtering, ADC buffering, and portable video routing requiring stable component supply, long-term manufacturability, and consistent parametric performance across temperature.
Supply support for LMH6639MFX 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.
The LMH6639 product line targets high-speed signal conditioning in resource-constrained systems, emphasizing rail-to-rail output, low quiescent current, fast shutdown, and robust input protection for video, test equipment, and portable electronics.
FAQ
What is the maximum supply voltage rating for LMH6639MFX?
The LMH6639MFX has an absolute maximum supply voltage (V+ − V−) of 13.5V. It is fully characterized for operation from 3V to 12V single supply and ±5V dual supply. Exceeding 13.5V risks permanent damage to the VIP10 process transistors and internal protection diodes.
Does LMH6639MFX require external compensation for unity-gain stability?
No, the LMH6639MFX is internally compensated and guaranteed stable at AV = +1 without external components. This is confirmed across all operating voltages (3V, 5V, ±5V) and temperatures (−40°C to +85°C), making it ideal for buffer configurations in video and data acquisition systems.
How does the shutdown function behave with different supply configurations?
The LMH6639MFX shutdown threshold is referenced to V+, not ground: device disables when SD voltage falls below V+ − 1.65V. This works identically in single-supply (e.g., 5V/V− = GND) and dual-supply (e.g., ±5V) modes, enabling consistent logic-level interfacing using standard 3V or 5V push-pull outputs.
What is the output short-circuit current capability of LMH6639MFX?
At 5V supply, the LMH6639MFX delivers 160mA sourcing and 190mA sinking short-circuit current (momentary test). Continuous output current is rated at 110mA linear drive, with output swing degrading to within 400mV of rails at that load - verified across −40°C to +85°C.
Can LMH6639MFX drive a 75Ω video cable directly?
Yes, the LMH6639MFX is characterized for 75Ω video loads: differential gain is 0.12% and differential phase is 0.045° at NTSC frequencies, with −60dBc harmonic distortion at 5MHz. Its 190MHz bandwidth and rail-to-rail output ensure full-swing transmission without clipping or group delay distortion.
LMH6639MFX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP10™
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 200V/µs
- Gain Bandwidth Product:
- 90 MHz
- -3db Bandwidth:
- 228 MHz
- Current - Input Bias:
- 1.4 µA
- Voltage - Input Offset:
- 1.3 mV
- Current - Supply:
- 4.18mA
- Current - Output / Channel:
- 112 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:
- SOT-23-6
LMH6639MFX FAQ
1.How can I place an order for LMH6639MFX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6639MFX 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 LMH6639MFX reliable?
The price and inventory of LMH6639MFX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6639MFX is usually 5 days.
3.What payment methods are accepted for LMH6639MFX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6639MFX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6639MFX?
LMH6639MFX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6639MFX 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 LMH6639MFX?
For technical support, including LMH6639MFX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6639MFX requirements.
6.How does Aetrix verify that LMH6639MFX is sourced from the original manufacturer or authorized distributors?
All LMH6639MFX 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 LMH6639MFX meets industry standards.
7.What is the process for return or replacement of LMH6639MFX?
All LMH6639MFX units undergo pre-shipment inspection (PSI). If there is an issue with LMH6639MFX, 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 LMH6639MFX part is unused and in its original packaging.
Return procedure for LMH6639MFX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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