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Texas Instruments LMH6559MA-TI
- Part No.:
- LMH6559MA-TI
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6559MA-TI.pdf
- Description:
- IC BUFFER 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:53,010
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Product details
Overview
LMH6559MA-TI from Texas Instruments (formerly National Semiconductor) is a high-speed, closed-loop unity-gain buffer optimized for video signal distribution and wideband analog signal routing. It delivers 1750MHz small-signal bandwidth, 4580V/µs slew rate, and −52dBc THD at 20MHz into 100Ω while consuming only 10mA quiescent current in ±5V operation - enabling low-power, high-fidelity buffering in broadcast video and test instrumentation.
For engineers reviewing the LMH6559MA-TI datasheet, LMH6559MA-TI pinout, LMH6559MA-TI application, or LMH6559MA-TI equivalent, this page provides verified technical context, real-world design meaning of key specs, package-validated pin functions, and two confirmed alternative parts with documented functional trade-offs for video routing, active filtering, and high-speed DC clamping use cases.
Technical Context
The LMH6559MA-TI implements a fixed-gain, closed-loop architecture with internal feedback set to unity voltage gain (ACL = 0.97–0.998 V/V), eliminating external resistor networks and ensuring stable operation across capacitive and transmission-line loads. Its VIP10 bipolar process enables ultra-low output resistance (1.2Ω at 100kHz) and high linear output current (±74mA), supporting direct drive of 75Ω/100Ω coaxial traces without external termination.
It operates from ±5V, +5V, or +3V single supplies, with supply current scaling from 2.4mA (3V) to 14mA (±5V), and maintains differential gain/phase of 0.06%/0.02° at 3.58MHz under 150Ω load - confirming suitability for NTSC/PAL composite video buffering where timing integrity and amplitude fidelity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small Signal Bandwidth | 1750MHz at ±5V - supports full HD/3G-SDI baseband signal passband without attenuation |
| Slew Rate | 4580V/µs - ensures distortion-free reproduction of fast-edged video sync pulses and digital modulation envelopes |
| Total Harmonic Distortion | −52dBc at 20MHz into 100Ω - meets broadcast-grade linearity requirements for analog RGB/YUV distribution |
| Output Resistance | 1.2Ω at 100kHz - enables <1% impedance mismatch when driving 50Ω/75Ω PCB traces or coax |
| Differential Gain / Phase | 0.06% / 0.02° at 3.58MHz - preserves color fidelity and timing alignment in composite video systems |
| Supply Current | 10mA typical at ±5V - allows integration into multi-channel video routers with thermal budget constraints |
| Input Resistance | 200kΩ - minimizes loading on preceding gain stages or crystal oscillator outputs |
Pinout & Package
LMH6559MA-TI is packaged in an 8-pin SOIC (NSC drawing M08A) with standard pinout compatible with industry-wide layout practices for high-speed op-amps. Thermal resistance is 172°C/W, requiring minimal copper pour for thermal management in video PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V− | Negative Supply | Connect to ground or negative rail; supports split-supply operation down to −5V |
| In− | Inverting Input | Internally tied to output via fixed feedback network; not externally accessible |
| In+ | Non-inverting Input | Main signal input node; high-Z (200kΩ) with 1.7pF capacitance - requires short trace routing |
| V+ | Positive Supply | Accepts 3V to 10V single supply or ±5V dual supply; PSRR ≥44dB up to 10MHz |
| Out | Buffer Output | Low-impedance (1.2Ω) source capable of ±74mA linear current - drives 75Ω video lines directly |
| NC | No Connect | Pins 1, 7, and 8 are unconnected; must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop unity-gain configuration | Eliminates external feedback components, reducing board area and parasitic sensitivity in 100+MHz layouts |
| Ultra-low output resistance | 1.2Ω enables direct 75Ω/50Ω trace matching without series resistors - preserving rise time and reducing reflections |
| High slew rate with low distortion | 4580V/µs + −52dBc THD allows clean amplification of 1080p sync pulses and RF-modulated video carriers |
| Video-optimized AC performance | 0.06% DG / 0.02° DP at 3.58MHz meets SMPTE RP-168 for professional analog video equipment |
| Wide supply range | Operates from +3V to ±5V - supports portable test gear (3V), industrial video (5V), and legacy broadcast (±5V) designs |
Applications
| Video Switching and Routing | Test Point Drivers |
|---|---|
Use Scenario: Distribution of composite NTSC/PAL signals across multiple monitor outputs in broadcast switchers. IC Role / Device Role / Timing Role: Closed-loop buffer isolating source from switching matrix capacitance while preserving sync pulse edge integrity. Use Value: 0.06% differential gain ensures no hue shift; 1750MHz bandwidth prevents chroma delay skew between Y/C paths. | Use Scenario: Driving high-impedance oscilloscope inputs from FPGA I/O banks during high-speed logic validation. IC Role / Device Role / Timing Role: Low-capacitance, low-output-impedance probe driver maintaining signal fidelity up to 1GHz. Use Value: 4580V/µs slew rate reproduces 100ps FPGA clock edges without rounding; 1.2Ω output minimizes reflection-induced jitter. |
| High-Frequency Active Filters | Wideband DC Clamping Buffers |
Use Scenario: Implementing 500MHz Sallen-Key low-pass filters in RF test receivers with minimal group delay variation. IC Role / Device Role / Timing Role: Unity-gain buffer isolating filter poles from load variations while sustaining flat gain up to 745MHz (5V supply). Use Value: 90MHz gain flatness (<0.1dB ripple) ensures amplitude consistency across IF band; low VOS (7mV typ) avoids DC offset accumulation. | Use Scenario: Clamping black-level reference in CCD imaging pipelines using diode-based DC restoration circuits. IC Role / Device Role / Timing Role: High-slew, low-output-Z buffer driving clamping diode junctions without distorting pixel clock transitions. Use Value: 2070V/µs (5V) slew rate handles 25MHz pixel clocks; 1.4Ω output resistance ensures fast clamp settling (<10ns) for progressive-scan sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3201DR | Higher 1.8GHz bandwidth but 2× higher supply current (20mA); 2.5V minimum supply | Better for >1GHz RF sampling; less suitable for battery-powered 3V video gear | Choose THS3201DR when bandwidth >1.7GHz is mandatory and power budget allows |
| LMH6702MA | Lower 1.3GHz bandwidth, higher 100mA output current, but −45dBc THD at 20MHz | Preferred for driving heavy capacitive loads (e.g., LCD column drivers); lower linearity limits video use | Choose LMH6702MA when output current >75mA is required and THD >−48dBc is acceptable |
Compared with THS3201DR and LMH6702MA, the LMH6559MA-TI offers the best balance of ultra-high bandwidth, broadcast-grade linearity, and low-quiescent-current operation - making it the preferred choice for multi-channel SDI reclockers, analog video routers, and portable test point buffers where thermal density and color fidelity are co-constrained.
Availability
LMH6559MA-TI is available at Aetrix Electronics and suitable for video switching and routing, test point drivers, and high-frequency active filters requiring stable component supply across industrial temperature ranges (−40°C to +85°C) and long-lifecycle production programs.
Supply support for LMH6559MA-TI 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 acquired National Semiconductor in 2011 and maintains full technical support, manufacturing, and documentation for legacy VIP10-process high-speed analog products like the LMH6559MA-TI.
The LMH6559MA-TI belongs to TI's high-speed buffer product line, designed specifically for analog signal integrity preservation in broadcast video, test instrumentation, and wideband communications infrastructure.
FAQ
What is the maximum operating supply voltage for LMH6559MA-TI?
The LMH6559MA-TI has an absolute maximum supply voltage rating of 13V (V+ − V−). For reliable operation, the recommended supply range is ±5V (10V total), +5V single supply, or +3V single supply. Exceeding ±5V risks exceeding junction temperature limits due to increased power dissipation - especially in the 8-pin SOIC package with θJA = 172°C/W.
Does LMH6559MA-TI support single-supply operation?
Yes, the LMH6559MA-TI supports true single-supply operation from +3V to +5V with rail-to-rail output swing referenced to V+/2. At +3V, it delivers ±1.0V output swing into 100Ω; at +5V, it achieves ±3.2V swing. Input common-mode range includes ground, enabling direct interface with 0V-referenced video sources and ADC drivers without level-shifting circuitry.
What is the input impedance of LMH6559MA-TI and how does it affect PCB layout?
The LMH6559MA-TI features 200kΩ input resistance and 1.7pF input capacitance in ±5V mode. This high-Z, low-C input minimizes loading on preceding stages but makes the In+ pin sensitive to stray capacitance. Layout best practice is to keep the In+ trace under 5mm length, avoid vias, and guard it with ground pour - otherwise, parasitic capacitance degrades the 1750MHz bandwidth and increases phase noise in video sync paths.
Can LMH6559MA-TI drive 75Ω coaxial cable directly without external termination?
Yes - the LMH6559MA-TI's 1.2Ω output resistance allows direct connection to 75Ω coax when used with series-source termination. Place a 73.8Ω resistor in series with the output (75Ω − 1.2Ω) to match characteristic impedance and suppress reflections. This eliminates need for external buffer ICs in SDI reclocker or video distribution amplifier designs, reducing bill-of-materials and propagation delay.
How does LMH6559MA-TI perform in differential gain/phase at 3.58MHz under 150Ω load?
The LMH6559MA-TI achieves 0.06% differential gain and 0.02° differential phase error at 3.58MHz into a 150Ω load - meeting SMPTE RP-168 and ITU-R BT.470 standards for professional analog video equipment. These values are measured under guaranteed conditions (TJ = 25°C, ±5V supply) and remain within 0.12%/0.04° over the full −40°C to +85°C industrial temperature range, ensuring consistent color reproduction across environmental extremes.
LMH6559MA-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 4580V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.05 GHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 10mA
- Current - Output / Channel:
- 83 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMH6559MA-TI FAQ
1.How can I place an order for LMH6559MA-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6559MA-TI 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 LMH6559MA-TI reliable?
The price and inventory of LMH6559MA-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6559MA-TI is usually 5 days.
3.What payment methods are accepted for LMH6559MA-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6559MA-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6559MA-TI?
LMH6559MA-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6559MA-TI 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 LMH6559MA-TI?
For technical support, including LMH6559MA-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6559MA-TI requirements.
6.How does Aetrix verify that LMH6559MA-TI is sourced from the original manufacturer or authorized distributors?
All LMH6559MA-TI 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 LMH6559MA-TI meets industry standards.
7.What is the process for return or replacement of LMH6559MA-TI?
All LMH6559MA-TI units undergo pre-shipment inspection (PSI). If there is an issue with LMH6559MA-TI, 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 LMH6559MA-TI part is unused and in its original packaging.
Return procedure for LMH6559MA-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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