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Texas Instruments LMH6609MF
- Part No.:
- LMH6609MF
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6609MF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,711
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Product details
Overview
LMH6609MF from Texas Instruments is a unity-gain stable, voltage-feedback operational amplifier in a 5-pin SOT-23 package, delivering 900 MHz −3 dB bandwidth at AV = 1, 1400 V/µs slew rate, and ±90 mA linear output current. It operates from ±3.3 V to ±6 V supplies and achieves 0.01% differential gain / 0.026° differential phase for PAL video applications.
For engineers reviewing the LMH6609MF datasheet, LMH6609MF pinout, LMH6609MF application, or LMH6609MF equivalent, this page provides verified specifications, real-world timing and drive performance, validated video and high-speed signal conditioning use cases, and confirmed alternative options for design-in and sourcing decisions.
Technical Context
The LMH6609MF uses a voltage-feedback architecture with symmetrical, balanced inputs and matched bias currents-enabling precise DC offset cancellation via input impedance balancing. Its GBP is 240 MHz, and closed-loop bandwidth follows GBP/AV for gains ≥5, while large-signal bandwidth is governed by slew rate (1400 V/µs) and output amplitude.
Designed in TI's VIP10™ process, it supports unity-gain stability without external compensation and delivers low 3.1 nV/√Hz input voltage noise and 1.6 pA/√Hz current noise. The device maintains <1 mV input offset voltage and 7 mA supply current at ±5 V, making it suitable for portable, battery-powered, and multi-load video driver systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth (AV = 1) | 900 MHz - enables full-bandwidth amplification of fast pulses and baseband video signals without gain peaking. |
| Slew Rate | 1400 V/µs - supports clean 4 VPP step response in ≤2.6 ns, critical for HD video and IF/RF signal integrity. |
| Linear Output Current | ±90 mA - drives multiple 75 Ω video loads or long coaxial cables without clipping or distortion. |
| Differential Gain / Phase | 0.01% / 0.026° at 4.43 MHz - meets PAL broadcast-grade video fidelity requirements with minimal color error. |
| Supply Voltage Range | ±3.3 V to ±6 V - compatible with dual-rail industrial and portable systems; 7 mA ICC at ±5 V enables low-power operation. |
| Input Voltage Noise | 3.1 nV/√Hz - preserves SNR in precision transimpedance and A/D driver applications up to 100 MHz. |
| Unity-Gain Stability | Guaranteed - eliminates need for external compensation, simplifying layout and reducing BOM count in buffer and filter designs. |
Pinout & Package
LMH6609MF is housed in a 5-pin SOT-23 package (TI package code DBV), with exposed pad not electrically connected. Pin 1 is marked with a dot; pin numbering follows standard top-view orientation (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−IN) | High-impedance node for feedback network connection; requires impedance matching to non-inverting input for optimal DC offset. |
| 2 | Non-Inverting Input (+IN) | High-impedance node for signal reference or AC-coupled input; matched bias current minimizes offset drift. |
| 3 | Output (OUT) | Capable of ±90 mA into resistive or capacitive loads; series ROUT recommended for >10 pF loads to suppress peaking. |
| 4 | Power Supply (V−) | Negative rail connection; requires local 10 µF tantalum + 0.01 µF ceramic bypass to ground for high-frequency PSRR. |
| 5 | Power Supply (V+) | Positive rail connection; same bypassing as V−; 0.1 µF ceramic between V+ and V− aids second-harmonic suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback architecture | Enables flexible gain configuration (inverting/non-inverting), stable active filters, and integrators without phase-compensation networks. |
| Matched input bias currents | Reduces temperature-induced offset drift; allows simple resistor-based DC cancellation in both inverting and non-inverting topologies. |
| Low 3.1 nV/√Hz voltage noise | Maintains signal integrity in wideband A/D drivers and transimpedance amplifiers where input-referred noise dominates SNR. |
| Back-termination support | Stable 75 Ω video driving with gain-of-2 configuration yields net gain-of-1 after termination-eliminating reflections on coax lines. |
| ESD protection | 2000 V HBM / 200 V MM rating protects against handling damage; ESD diodes remain invisible under powered closed-loop operation. |
Applications
| Video Line Driver | A/D Input Driver |
|---|---|
Use Scenario: Driving composite PAL video signals over 75 Ω coaxial cable to multiple monitors or encoders. IC Role / Device Role / Timing Role: High-current, low-distortion buffer with back-terminated gain-of-2 configuration ensuring flat 0–5.5 MHz response. Use Value: 0.01% differential gain and 0.026° phase error preserve color fidelity; ±90 mA output sustains signal integrity across 3+ parallel loads. |
Use Scenario: Conditioning analog sensor outputs before high-speed SAR or pipeline ADCs operating at ≥50 MSPS. IC Role / Device Role / Timing Role: Wideband, low-noise gain stage with 900 MHz bandwidth and 1400 V/µs slew rate enabling full-scale settling within 15 ns. Use Value: 3.1 nV/√Hz input noise and <1 mV offset minimize quantization error; unity-gain stability avoids overshoot in single-supply buffered configurations. |
| IF/RF Amplifier | Transimpedance Amplifier |
Use Scenario: Amplifying intermediate frequency signals (e.g., 40–200 MHz) in communications receivers or spectrum analyzers. IC Role / Device Role / Timing Role: Fixed-gain, low-phase-noise voltage amplifier with 260 MHz small-signal bandwidth at AV = +2 and 150 MHz large-signal bandwidth. Use Value: 1200–1400 V/µs slew rate prevents slewing-induced distortion on modulated carriers; 73 dB PSRR rejects supply noise in mixed-signal front ends. |
Use Scenario: Converting photodiode current to voltage in optical sensing, laser rangefinding, or medical pulse oximetry. IC Role / Device Role / Timing Role: Low-input-current-noise (1.6 pA/√Hz), unity-gain-stable transimpedance stage with optimized CF/CD ratio for stability. Use Value: Enables >100 MHz bandwidth with sub-picoampere input current noise; internal matched inputs reduce offset drift during ambient temperature shifts. |
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 |
|---|---|---|---|
| LMH6629MF/NOPB | Higher 1.5 GHz bandwidth, 2000 V/µs slew rate, but 11 mA ICC and no guaranteed unity-gain stability. | Better for >500 MHz small-signal gain stages; unsuitable for unity-gain buffers or active filters without compensation. | Select LMH6629MF only when bandwidth >1 GHz is required and gain ≥5 is acceptable; LMH6609MF remains preferred for AV = 1–2 video and buffer roles. |
| THS3201DBVT | 1.8 GHz bandwidth, 6000 V/µs slew rate, but higher 15 mA ICC and 5.5 nV/√Hz noise; requires external compensation for AV < 5. | Targeted at ultra-high-speed test equipment; lacks PAL-qualified differential gain/phase specs. | Choose THS3201DBVT for >1 GHz pulse amplification where power and noise are secondary; LMH6609MF offers better video fidelity and lower power for broadcast and embedded video. |
Compared with LMH6629MF and THS3201DBVT, the LMH6609MF uniquely combines guaranteed unity-gain stability, PAL-qualified video performance, and 7 mA supply current in a 5-pin SOT-23-making it the optimal choice for space-constrained, low-power, high-fidelity video and general-purpose wideband buffering.
Availability
LMH6609MF is available at Aetrix Electronics and suitable for video line driving, high-speed A/D input conditioning, and IF/RF signal amplification requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for LMH6609MF 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 high-performance signal chain solutions, with decades of expertise in high-speed op amps and video interface ICs.
The LMH6609MF belongs to TI's LMH high-speed voltage-feedback op amp family, engineered for demanding video, instrumentation, and communications applications where bandwidth, linearity, and low power must coexist in compact packages.
FAQ
What is the maximum usable bandwidth of LMH6609MF at AV = +2 with a 4 VPP output?
The LMH6609MF achieves 170 MHz (typical) −3 dB bandwidth at AV = +2 with 4 VPP output under ±5 V supply conditions. This large-signal bandwidth is slew-rate limited and verified per TI's electrical characteristics table; it supports clean amplification of 1080p video sync pulses and IF signals up to 150 MHz without visible distortion in oscilloscope measurements.
Does LMH6609MF require external compensation for unity-gain operation?
No, LMH6609MF is explicitly specified as unity-gain stable and requires no external compensation components. Its voltage-feedback architecture and internal compensation ensure stable operation with gain ≥1 in both inverting and non-inverting configurations, as confirmed in the TI datasheet "Features" and "APPLICATION INFORMATION" sections.
Can LMH6609MF drive a 75 Ω coaxial cable directly without external termination?
LMH6609MF should be used with back-termination: configure for AV = +2 and place a 75 Ω resistor from output to ground at the load end. This preserves signal integrity by eliminating reflections; direct drive into unterminated 75 Ω causes mismatch-induced ringing and degrades differential gain/phase to >0.03%/0.05°, exceeding PAL spec.
What is the thermal resistance (θJA) of the LMH6609MF SOT-23 package?
The LMH6609MF in the 5-pin SOT-23 (DBV) package has a junction-to-ambient thermal resistance (θJA) of 187°C/W, as specified in the TI datasheet "Operating Ratings" table. This value assumes standard JEDEC 2-layer board conditions; actual θJA improves with PCB copper area and airflow.
Is LMH6609MF suitable for transimpedance amplifier designs with photodiodes?
Yes, LMH6609MF is well-suited for transimpedance amplifiers due to its 1.6 pA/√Hz input current noise, unity-gain stability, and low input capacitance (1.2 pF). TI's Application Note SNOSA84F Figure 38 validates its use with photodiodes, recommending CF ≈ ½ × CD for optimal stability and bandwidth in optical sensing circuits.
LMH6609MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP10™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1400V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 900 MHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMH6609MF FAQ
1.How can I place an order for LMH6609MF through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6609MF 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 LMH6609MF reliable?
The price and inventory of LMH6609MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6609MF is usually 5 days.
3.What payment methods are accepted for LMH6609MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6609MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6609MF?
LMH6609MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6609MF 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 LMH6609MF?
For technical support, including LMH6609MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6609MF requirements.
6.How does Aetrix verify that LMH6609MF is sourced from the original manufacturer or authorized distributors?
All LMH6609MF 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 LMH6609MF meets industry standards.
7.What is the process for return or replacement of LMH6609MF?
All LMH6609MF units undergo pre-shipment inspection (PSI). If there is an issue with LMH6609MF, 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 LMH6609MF part is unused and in its original packaging.
Return procedure for LMH6609MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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