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Texas Instruments LMH6609MAX/NOPB
- Part No.:
- LMH6609MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6609MAX/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,355
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Product details
Overview
LMH6609MAX/NOPB from Texas Instruments is a unity-gain-stable, voltage-feedback operational amplifier optimized for high-speed video, IF/RF, and active filter applications. It delivers 900 MHz −3 dB bandwidth at AV = 1, 1400 V/µs slew rate, 90 mA linear output current, and 0.01%/0.026° differential gain/phase - enabling single-supply or dual-supply driving of multiple 75 Ω video loads with minimal distortion.
For engineers reviewing the LMH6609MAX/NOPB datasheet, LMH6609MAX/NOPB pinout, LMH6609MAX/NOPB application, or LMH6609MAX/NOPB equivalent, key selection criteria include large-signal bandwidth at ±5 V supply, transimpedance amplifier stability, capacitive load drive capability with ROUT compensation, and SOIC-8 thermal performance under 7–9 mA quiescent current.
Technical Context
The LMH6609MAX/NOPB employs a voltage-feedback architecture with balanced, symmetrical inputs and matched bias currents, enabling precise DC offset control via input impedance balancing. Its GBP is 240 MHz, and closed-loop bandwidth follows GBP/AV for gains ≥5; for lower gains, slew-rate-limited large-signal bandwidth dominates.
It features unity-gain stability without external compensation, supports ±3.3 V to ±6 V supplies (±5 V nominal), and integrates ESD protection (2000 V HBM). The device operates across −40°C to +85°C and uses TI's VIP10™ process for low noise (3.1 nV/√Hz) and high linearity (HD2 = −63 dBc at 20 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth (AV = 1) | 900 MHz at ±5 V, VOUT = 0.25 VPP - enables baseband video and wideband IF signal amplification without gain peaking. |
| Slew Rate | 1400 V/µs (typical) - supports full-scale 4 V step response in ≤2.6 ns, critical for fast pulse and DAC buffer applications. |
| Linear Output Current | ±90 mA - drives two or more 75 Ω video loads simultaneously while maintaining <0.1% differential gain error. |
| Input Offset Voltage | ±0.8 mV (max) - ensures sub-mV DC accuracy in precision active filters and integrators without trimming. |
| Voltage Noise Density | 3.1 nV/√Hz (>1 MHz) - minimizes noise contribution in transimpedance amplifiers and low-level signal conditioning. |
| Supply Current | 7.0 mA (typical, ±5 V, no load) - enables battery-powered test equipment and portable instrumentation with low thermal dissipation. |
| Differential Gain/Phase | 0.01% / 0.026° at 4.43 MHz, RL = 150 Ω - meets PAL video broadcast fidelity requirements with back-terminated coaxial lines. |
Pinout & Package
LMH6609MAX/NOPB is housed in an 8-pin SOIC package (Package Code: D, JEDEC MS-012AA), with θJA = 145°C/W and θJC = 65°C/W. The exposed pad is not present; thermal management relies on PCB copper area under the package body.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - must be left floating or grounded per layout best practice to minimize parasitic coupling. |
| 2 | Inverting Input (−IN) | High-impedance node for feedback network connection; requires impedance matching to +IN for optimal DC offset cancellation. |
| 3 | Non-Inverting Input (+IN) | High-impedance input; bias current matches −IN within ±1 µA over temperature for minimized offset drift. |
| 4 | V− | Negative supply rail; bypass with 0.01 µF ceramic + 10 µF tantalum to ground for high-frequency PSRR enhancement. |
| 5 | Output | Capable of ±90 mA into resistive or reactive loads; series ROUT (e.g., 51 Ω) required when driving >10 pF capacitance. |
| 6 | V+ | Positive supply rail; identical bypassing as V− required; supports ±3.3 V to ±6 V operation with monotonic performance. |
| 7 | NC | No internal connection - electrically isolated; avoid routing signals or power near this pin. |
| 8 | NC | No internal connection - unused pin; tie to ground only if required for mechanical stability or EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable voltage feedback topology | Enables direct use in Sallen-Key filters, integrators, and buffers without external compensation components. |
| Matched input bias currents | Tracks within ±1 µA over −40°C to +85°C - allows DC offset reduction to <1 mV using simple resistor balancing. |
| Low-noise transimpedance capability | 3.1 nV/√Hz voltage noise + 1.6 pA/√Hz current noise - supports photodiode amplification with >80 dB SNR at 1 MHz. |
| Video-optimized AC performance | 0.01% DG / 0.026° DP at 4.43 MHz - satisfies PAL broadcast standards without post-amplifier correction circuitry. |
| Capacitive load drive support | Stable with up to 100 pF load when using recommended ROUT (e.g., 17 Ω @ ±5 V) - eliminates need for external isolation stages. |
Applications
| Video Line Driver | IF Amplifier |
|---|---|
|
Use Scenario: Driving dual 75 Ω composite video outputs from a single source in broadcast monitoring equipment. IC Role / Device Role / Timing Role: Buffer amplifier configured for AV = 2 with back-termination to achieve net AV = 1 and suppress transmission-line reflections. Use Value: Maintains 0.01% differential gain and 0.026° phase error across PAL spectrum (4.43 MHz), eliminating color shift in multi-display systems. |
Use Scenario: Amplifying 70 MHz IF signals in software-defined radio front-ends before ADC sampling. IC Role / Device Role / Timing Role: High-linearity gain stage operating at AV = +2 with 250 Ω feedback resistors to preserve SNR and minimize group delay variation. Use Value: Delivers 260 MHz small-signal bandwidth and −63 dBc HD2 at 20 MHz, ensuring clean digitization of narrowband IF channels. |
| Transimpedance Amplifier | Active Filter Stage |
|
Use Scenario: Converting photocurrent from a 5 pF PIN diode in optical sensing applications. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier with 1 kΩ feedback resistor and 0.5 pF CF for stability. Use Value: Achieves 1 GHz gain-bandwidth product with <10 ns rise time and <3.5 nV/√Hz effective input noise, enabling sub-ns optical pulse detection. |
Use Scenario: Second-order low-pass filtering in medical ultrasound receive chains with cutoff at 15 MHz. IC Role / Device Role / Timing Role: Sallen-Key topology op amp with equal capacitor values and precision metal-film resistors for monotonic roll-off. Use Value: Provides 900 MHz unity-gain bandwidth margin, ensuring <0.1 dB passband flatness up to 12 MHz and minimal phase distortion. |
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 |
|---|---|---|---|
| LMH6629MA/NOPB | Higher 1.5 GHz GBW, 2.5 nV/√Hz noise, but 12 mA ICC and no guaranteed PAL video specs. | Better for RF/IF gain blocks requiring >1 GHz closed-loop bandwidth; less suitable for cost-sensitive video distribution. | Select LMH6629MA/NOPB when bandwidth >1 GHz is mandatory and power budget allows +5 mA overhead. |
| THS3201DGN | Current-feedback architecture, 1.8 GHz BW, 2000 V/µs SR, but requires careful feedback resistor selection and lacks unity-gain stability. | Preferred for ultra-high-speed non-inverting gain ≥5; unsuitable for integrators or unity-gain buffers without modification. | Choose THS3201DGN only for fixed high-gain, wideband amplification where layout-controlled stability is feasible. |
Compared with LMH6609MAX/NOPB, LMH6629MA/NOPB trades higher bandwidth and lower noise for increased supply current and missing video-grade differential specifications, while THS3201DGN offers superior speed but demands current-feedback design expertise and forfeits unity-gain usability.
Availability
LMH6609MAX/NOPB is available at Aetrix Electronics and suitable for video line drivers, IF/RF amplifiers, and active filter designs requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LMH6609MAX/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 high-performance signal chain solutions, with decades of heritage in precision op amps and video interface ICs.
The LMH6609MAX/NOPB belongs to TI's LMH high-speed op amp family, engineered specifically for demanding video, communications, and instrumentation applications where bandwidth, linearity, and low distortion are critical.
FAQ
What supply voltage range does the LMH6609MAX/NOPB support?
The LMH6609MAX/NOPB operates from ±3.3 V to ±6 V dual supplies, with nominal characterization at ±5 V. It maintains specified performance across this range - including 900 MHz bandwidth at ±5 V and 450 MHz at ±3.3 V - making LMH6609MAX/NOPB suitable for both legacy 5 V systems and modern low-voltage portable designs.
Can the LMH6609MAX/NOPB drive 75 Ω video loads directly?
Yes, LMH6609MAX/NOPB delivers ±90 mA linear output current and is explicitly characterized for 75 Ω video loads. When configured for AV = 2 with back-termination, it achieves 0.01% differential gain and 0.026° phase error per PAL standards - confirming LMH6609MAX/NOPB is qualified for broadcast-grade video distribution without external current boosters.
Is the LMH6609MAX/NOPB unity-gain stable without external compensation?
Yes, LMH6609MAX/NOPB is fully unity-gain stable in voltage-feedback configuration, as confirmed by TI's datasheet and application notes. No external compensation capacitors or feedback networks are required for AV = 1 operation - a key differentiator from many high-speed current-feedback op amps that require minimum gain for stability.
What is the recommended feedback resistor value for the LMH6609MAX/NOPB?
TI specifies 250 Ω as the optimal feedback resistor for LMH6609MAX/NOPB at gains ≥+2 and ≤−1. Using 250 Ω balances bandwidth, noise, and pulse response integrity; deviations increase thermal noise (low R) or cause peaking/ringing (high R). For AV = 1, direct short from output to −IN is used - no resistor required - preserving LMH6609MAX/NOPB's full 900 MHz bandwidth.
Does the LMH6609MAX/NOPB support single-supply operation?
LMH6609MAX/NOPB is specified for dual-supply operation (±3.3 V to ±6 V), but can be used in single-supply configurations with proper input/output voltage headroom management. Its input common-mode range extends to V−, and output swings to within 1.3 V of rails at ±5 V - enabling LMH6609MAX/NOPB use in 10 V single-supply systems with appropriate level-shifting and biasing.
LMH6609MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP10™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8-SOIC
LMH6609MAX/NOPB FAQ
1.How can I place an order for LMH6609MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6609MAX/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 LMH6609MAX/NOPB reliable?
The price and inventory of LMH6609MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6609MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6609MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6609MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6609MAX/NOPB?
LMH6609MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6609MAX/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 LMH6609MAX/NOPB?
For technical support, including LMH6609MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6609MAX/NOPB requirements.
6.How does Aetrix verify that LMH6609MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6609MAX/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 LMH6609MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6609MAX/NOPB?
All LMH6609MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6609MAX/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 LMH6609MAX/NOPB part is unused and in its original packaging.
Return procedure for LMH6609MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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