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Texas Instruments LMH6559MF
- Part No.:
- LMH6559MF
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6559MF.pdf
- Description:
- IC BUFFER 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,267
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Product details
Overview
LMH6559MF from Texas Instruments is a high-speed, unity-gain closed-loop buffer IC designed for video signal distribution and high-frequency analog signal routing on PCBs. It delivers 1750MHz small-signal bandwidth, 4580V/μs slew rate, 0.06% differential gain / 0.02° differential phase at 3.58MHz, and operates from ±5V supplies with only 10mA quiescent current - making it ideal for SD/HD video switching, test point drivers, and wideband active filters.
For engineers reviewing the LMH6559MF datasheet, LMH6559MF pinout, LMH6559MF application, or LMH6559MF equivalent, key selection criteria include its fixed-gain-1 architecture, 1.2Ω output impedance, 200kΩ input resistance, 75mA linear output current capability, and compatibility with 50Ω/75Ω transmission-line loads in video and instrumentation systems.
Technical Context
The LMH6559MF uses TI's VIP10 high-speed bipolar process to implement a fully internalized closed-loop buffer with no external feedback components required. Its loop gain is fixed at unity, eliminating stability concerns from external network design while maintaining DC precision via 200kΩ input resistance and low 3mV typical input offset voltage.
It supports both dual-supply (±3V to ±5V) and single-supply (3V to 10V) operation, with supply rejection ratio of 63dB at ±5V. Output stage delivers rail-to-rail swing into 100Ω loads (±3.2V min), and maintains <0.1dB gain flatness up to 200MHz under 100Ω termination - critical for composite video and broadband DC clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small Signal Bandwidth | 1750MHz at ±5V - enables full NTSC/PAL/SDTV and HDTV baseband video signal passband without attenuation |
| Slew Rate | 4580V/μs - supports clean 3.3Vpp transient response with 0.4ns rise time, essential for fast edge integrity |
| Differential Gain/Phase | 0.06% / 0.02° at 3.58MHz - meets broadcast-grade video fidelity requirements per SMPTE/ITU standards |
| Output Resistance | 1.2Ω at 100kHz - ensures precise 50Ω/75Ω transmission line matching and minimal reflection-induced distortion |
| Supply Current | 10mA typical at ±5V - enables low-power, multi-channel video distribution without thermal derating |
| Input Resistance | 200kΩ - provides high-Z interface to preceding stages (e.g., video DACs, multiplexers) with minimal loading |
| THD @ 20MHz | −52dBc into 100Ω - guarantees low harmonic contamination in wideband active filter and peak detector circuits |
Pinout & Package
LMH6559MF is packaged in a 5-pin SOT-23 (DBV) surface-mount package with exposed pad for thermal enhancement. Pin 1 = VCC, Pin 2 = NC, Pin 3 = VIN, Pin 4 = VOUT, Pin 5 = VEE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VCC) | Positive supply terminal | Accepts +3V to +10V (single-supply) or +5V (dual-supply); requires local 100nF bypass to ground |
| Pin 2 (NC) | No-connect terminal | Internally unconnected; must be left floating or tied to ground per layout best practice |
| Pin 3 (VIN) | Inverting input node | High-impedance (200kΩ), DC-coupled input; accepts differential or single-ended signals referenced to VCM |
| Pin 4 (VOUT) | Buffered output node | Low-impedance (1.2Ω) source/sink capable of ±74mA linear current into 100Ω loads |
| Pin 5 (VEE) | Negative supply terminal | Accepts 0V (single-supply) or −5V (dual-supply); requires local 100nF bypass to ground |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop unity gain | Eliminates external feedback components and associated layout sensitivity, reducing board area and improving repeatability |
| 75mA linear output drive | Directly drives 50Ω coaxial cables or parallel 75Ω video loads without external emitter-follower stages |
| 0.06% differential gain | Preserves color saturation and hue accuracy in composite video systems operating at 3.58MHz color subcarrier |
| 1750MHz bandwidth | Supports >1080p60 RGB/YUV baseband video with full DC–1.75GHz passband and <0.1dB ripple |
| Single-supply operation down to 3V | Enables integration into portable and low-voltage embedded vision systems without negative rail generation |
Applications
| Video Switching and Routing | Test Point Drivers |
|---|---|
Use Scenario: Distribution of multiple SD/HD video sources to monitors, recorders, or matrix switchers in broadcast control rooms. IC Role / Device Role / Timing Role: Unity-gain buffer isolating source DACs from long 75Ω coax runs and multiple downstream loads. Use Value: Maintains 0.06% differential gain and 0.02° phase error across 3.58MHz color subcarrier, preserving broadcast-compliant chroma fidelity. | Use Scenario: Providing low-impedance, high-fidelity access points for probing high-speed digital or analog waveforms on production test fixtures. IC Role / Device Role / Timing Role: Active probe driver delivering 4580V/μs slew rate and 1750MHz bandwidth to preserve signal edge integrity during oscilloscope measurement. Use Value: Enables accurate capture of sub-nanosecond transitions without added ringing or amplitude droop due to cable capacitance. |
| High Frequency Active Filters | Wideband DC Clamping Buffers |
Use Scenario: Implementing tunable bandpass or low-pass filters in RF front-ends and software-defined radio receivers. IC Role / Device Role / Timing Role: High-Z input and low-Z output stage enabling cascaded filter sections with minimal inter-stage loading and phase shift. Use Value: Delivers −52dBc THD at 20MHz and 200MHz gain flatness, ensuring linear frequency response over multi-octave filter passbands. | Use Scenario: Restoring DC level in AC-coupled video or communication signals after capacitive coupling removes baseline reference. IC Role / Device Role / Timing Role: Low-offset (3mV typ), high-bandwidth buffer placed after diode clamp circuit to restore and distribute clamped signal. Use Value: Achieves <0.1dB gain flatness to 200MHz and 0.06% differential gain, preventing luminance tilt and sync pulse distortion in clamped video paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar closed-loop buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6554MA/NOPB | Higher 2.8GHz bandwidth but requires external feedback; 12mA supply current; SOIC-8 package | Used where adjustable gain or higher bandwidth is needed; less suitable for space-constrained video routing | Select when gain flexibility or >2GHz bandwidth outweighs need for simplicity and SOT-23 footprint |
| THS3201DR | 2.1GHz bandwidth, 5000V/μs slew rate, but 15mA supply current and no guaranteed differential gain spec | Preferred in high-speed ADC driver or pulse amplification roles; not characterized for video differential specs | Choose for non-video, ultra-high-slew applications where video fidelity metrics are not required |
Compared with LMH6554MA/NOPB and THS3201DR, the LMH6559MF offers the only combination of factory-characterized 0.06%/0.02° video performance, integrated unity-gain topology, and 5-pin SOT-23 footprint - making it uniquely suited for compact, broadcast-grade video signal distribution.
Availability
LMH6559MF is available at Aetrix Electronics and suitable for video switching and routing, test equipment signal conditioning, and high-frequency active filter designs requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LMH6559MF 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 amplifier design and video signal chain solutions.
The LMH6559MF belongs to TI's high-speed buffer product line, engineered specifically for broadcast video infrastructure, instrumentation signal integrity, and high-fidelity analog signal distribution where unity-gain stability, low distortion, and tight video specifications are mandatory.
FAQ
What is the recommended power supply configuration for LMH6559MF in video applications?
The LMH6559MF supports both single-supply (3V to 10V) and dual-supply (±3V to ±5V) operation. For composite video applications at 3.58MHz, TI recommends ±5V supplies to achieve the specified 0.06% differential gain and 0.02° differential phase. The LMH6559MF datasheet confirms that these video performance metrics are guaranteed only under ±5V conditions with RL = 150Ω to 0V.
Does LMH6559MF require external feedback resistors to operate?
No, the LMH6559MF is an internally configured closed-loop buffer with fixed unity gain (ACL = 0.996 V/V typical). No external feedback components are required - simplifying layout, eliminating resistor tolerance effects, and guaranteeing stability across temperature and process variation. This distinguishes the LMH6559MF from general-purpose op-amps like the LMH6554, which require external networks.
Can LMH6559MF drive a 75Ω coaxial cable directly?
Yes, the LMH6559MF is explicitly designed for direct 75Ω video load driving. With 1.2Ω output resistance and 75mA linear output current, it achieves proper source termination into 75Ω lines when used with appropriate series resistor (typically 73.8Ω) at the output. TI's application notes confirm this configuration preserves differential gain/phase and minimizes reflections in SD/HD video routing.
What is the maximum junction temperature and thermal resistance for LMH6559MF?
The LMH6559MF has a maximum junction temperature of +150°C and a package thermal resistance θJA of 235°C/W for the 5-pin SOT-23 (DBV) package. At 10mA supply current and ±5V operation, power dissipation is ~100mW; with ambient temperature at 85°C, junction temperature remains below 110°C - well within safe operating limits even without forced airflow.
Is LMH6559MF pin-compatible with other TI high-speed buffers like LMH6552 or LMH6554?
No, the LMH6559MF is not pin-compatible with LMH6552 (SOIC-8, dual-channel) or LMH6554 (SOIC-8, external-feedback). The LMH6559MF uses a unique 5-pin SOT-23 pinout (VCC, NC, VIN, VOUT, VEE) optimized for single-channel, space-constrained video routing. Substitution requires PCB redesign and validation of gain configuration, bandwidth, and video performance.
LMH6559MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 4580V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.75 GHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 10mA
- Current - Output / Channel:
- 74 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:
- SOT-23-5
LMH6559MF FAQ
1.How can I place an order for LMH6559MF through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6559MF 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 LMH6559MF reliable?
The price and inventory of LMH6559MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6559MF is usually 5 days.
3.What payment methods are accepted for LMH6559MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6559MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6559MF?
LMH6559MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6559MF 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 LMH6559MF?
For technical support, including LMH6559MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6559MF requirements.
6.How does Aetrix verify that LMH6559MF is sourced from the original manufacturer or authorized distributors?
All LMH6559MF 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 LMH6559MF meets industry standards.
7.What is the process for return or replacement of LMH6559MF?
All LMH6559MF units undergo pre-shipment inspection (PSI). If there is an issue with LMH6559MF, 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 LMH6559MF part is unused and in its original packaging.
Return procedure for LMH6559MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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