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Texas Instruments LMH6654MFX/NOPB
- Part No.:
- LMH6654MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6654MFX/NOPB.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
LMH6654MFX/NOPB from Texas Instruments is a single-channel, voltage-feedback operational amplifier optimized for high-speed, low-noise signal conditioning in ±2.5 V to ±6 V systems. It delivers 250 MHz unity-gain bandwidth, 200 V/µs slew rate, 4.5 nV/√Hz input voltage noise, and rail-to-rail output swing (−3.6 V to +3.4 V on 100 Ω load) - enabling precision ADC driving and video signal amplification in portable instrumentation.
For engineers reviewing the LMH6654MFX/NOPB datasheet, LMH6654MFX/NOPB pinout, LMH6654MFX/NOPB application, or LMH6654MFX/NOPB equivalent, key selection criteria include its 25 ns 0.01% settling time, −5.15 V to +3.7 V input common-mode range (extending 150 mV below negative rail), and SOT-23-5 package compatibility with space-constrained, battery-powered designs.
Technical Context
The LMH6654MFX/NOPB employs TI's VIP10™ complementary bipolar process to achieve unity-gain stability with 250 MHz bandwidth while consuming only 4.5 mA per channel. Its voltage-feedback architecture enables predictable gain-bandwidth tradeoffs: 130 MHz at G = +2, 52 MHz at G = +5, and 26 MHz at G = +10 - supporting flexible closed-loop configurations without external compensation.
It features true single-supply capability with input common-mode voltage extending to −5.15 V (150 mV below V−) and within 1.3 V of V+, plus output swing to within 0.4 V of either rail under 100 Ω load. Input-referred noise remains flat at 4.5 nV/√Hz above 0.1 MHz, and harmonic distortion stays ≤−80 dBc at 5 MHz (2 VPP, RL = 100 Ω).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 250 MHz - supports stable G = +1 operation for wideband buffer and line driver applications |
| Slew Rate | 200 V/µs - ensures faithful reproduction of fast transient signals (e.g., video pulses, ADC sampling edges) |
| Input Voltage Noise | 4.5 nV/√Hz - minimizes added noise in low-level sensor and preamp stages |
| Supply Current | 4.5 mA/channel - enables high-speed performance in power-sensitive portable systems |
| Settling Time (0.01%) | 25 ns - meets timing requirements for high-throughput data acquisition and imaging systems |
| Input Common-Mode Range | −5.15 V to +3.7 V (±5 V supply) - allows direct interfacing with bipolar sensors and legacy analog rails |
| Output Swing (RL = 100 Ω) | −3.6 V to +3.4 V - maximizes dynamic range into moderate-impedance loads without clipping |
Pinout & Package
LMH6654MFX/NOPB is housed in a 5-pin SOT-23 package (2.90 mm × 1.60 mm body size), optimized for compact PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUTPUT | Amplifier output | Delivers full-swing, low-impedance signal; requires minimal trace length to avoid instability with capacitive loads |
| 2 - V− | Negative supply | Reference for biasing; accepts −2.5 V to −6 V; must be decoupled locally with 0.1 µF ceramic capacitor |
| 3 - +IN | Non-inverting input | High-impedance node (1.8 pF); connects to signal source or feedback network; sensitive to layout parasitics |
| 4 - −IN | Inverting input | Virtual ground node in standard configurations; critical path for stability-keep feedback resistor short and direct |
| 5 - V+ | Positive supply | Reference for biasing; accepts +2.5 V to +6 V; shares decoupling with V− but uses separate vias if possible |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback architecture | Enables predictable bandwidth vs. gain scaling and eliminates need for external compensation in most configurations |
| Rail-to-rail output swing | Delivers >95% of supply rails into 100 Ω - preserves SNR in high-fidelity video and communication interfaces |
| Input CMVR beyond rails | Accepts inputs 150 mV below V− - simplifies level-shifting in mixed-supply systems and sensor front-ends |
| Low 4.5 nV/√Hz noise floor | Reduces integrated noise in 1–100 MHz bands - critical for ultrasound receivers and RF IF amplifiers |
| 25 ns 0.01% settling | Supports ≥20 MSPS sampling without aperture error - suitable for pipeline and sigma-delta ADC drivers |
Applications
| ADC Drivers | Consumer Video |
|---|---|
|
Use Scenario: Driving the analog input of a 12-bit, 50 MSPS pipeline ADC in a portable spectrum analyzer. IC Role / Device Role / Timing Role: Buffer and level-shift baseband I/Q signals from a mixer to match ADC input range and minimize sampling distortion. Use Value: 25 ns settling ensures <0.01% code-dependent error across full-scale transitions; 4.5 nV/√Hz noise contributes <0.5 LSB RMS noise at 12-bit resolution. |
Use Scenario: Amplifying composite NTSC video signals in a handheld media player's display interface. IC Role / Device Role / Timing Role: Unity-gain buffer with DC restoration, preserving luminance/chrominance integrity up to 5.5 MHz. Use Value: 0.01% differential gain (DG) and 0.025° differential phase (DP) meet SMPTE RP-168 spec; 200 V/µs slew prevents edge ringing on sync pulses. |
| Active Filters | Pulse Delay Circuits |
|
Use Scenario: Implementing a 4th-order Butterworth low-pass filter (fc = 50 MHz) in an RF test instrument's IF chain. IC Role / Device Role / Timing Role: High-Q, low-distortion gain stage in multiple-feedback topology with precise pole placement. Use Value: 250 MHz GBW enables accurate filter response beyond fc; −85 dB third-harmonic distortion avoids intermodulation in adjacent channels. |
Use Scenario: Generating precisely timed, low-jitter delay lines for time-of-flight laser rangefinders. IC Role / Device Role / Timing Role: Fast-settling inverting amplifier with matched RC networks to produce sub-nanosecond delay steps. Use Value: 1.2 ns fall time and 1.4 ns rise time ensure <50 ps pulse skew; 25 ns 0.01% settling guarantees deterministic delay accuracy. |
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 | Lower 1.9 nV/√Hz noise, higher 5.5 mA supply current, same SOT-23-5 package | Better suited for ultra-low-noise preamps where power budget allows; less optimal for battery-powered systems | Select when noise dominates system SNR and 1.1× higher quiescent current is acceptable |
| THS3201DGN | Current-feedback architecture, 1.8 GHz bandwidth, 4000 V/µs slew rate, MSOP-8 package | Requires different feedback design; superior for >100 MHz fixed-gain applications but unstable at G = +1 without modification | Choose for very high-frequency (>300 MHz) fixed-gain amplification where voltage-feedback limitations apply |
Compared with LMH6654MFX/NOPB, LMH6629MA/NOPB trades 2.6 nV/√Hz higher noise for 1.0 mA lower supply current, while THS3201DGN offers 7× higher bandwidth at the cost of unity-gain instability and incompatible feedback topology - making LMH6654MFX/NOPB the balanced choice for general-purpose 250 MHz voltage-feedback needs.
Availability
LMH6654MFX/NOPB is available at Aetrix Electronics and suitable for ADC driver, consumer video, active filter, and pulse delay circuit applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LMH6654MFX/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 and embedded processing technologies, with over 90 years of innovation in high-performance signal chain solutions.
The LMH6654MFX/NOPB belongs to TI's LMH high-speed amplifier product line, engineered for applications demanding wide bandwidth, low noise, and rail-compatible operation in portable and instrumentation systems.
FAQ
What is the maximum operating supply voltage for LMH6654MFX/NOPB?
The LMH6654MFX/NOPB supports a total supply voltage range of ±2.5 V to ±6 V (i.e., 5 V to 12 V total), with absolute maximum ratings specifying V+ − V− ≤ 13.2 V. Operation at ±6 V is fully characterized in the datasheet, delivering 250 MHz bandwidth and 200 V/µs slew rate - confirming robustness across its rated range. Exceeding ±6 V risks permanent damage per Absolute Maximum Ratings.
Does LMH6654MFX/NOPB support true single-supply operation?
Yes, LMH6654MFX/NOPB supports true single-supply operation: its input common-mode voltage range extends to −0.15 V (with V− = 0 V) and up to V+ − 1.3 V, while output swings to within 0.4 V of either rail. When powered from 0 V / +5 V, it achieves −0.15 V to +3.7 V input range and +1.3 V to +3.7 V output swing into 100 Ω - enabling direct interfacing with microcontroller DACs and unipolar sensors without level-shifting circuitry.
What is the recommended feedback resistor value for unity-gain configuration of LMH6654MFX/NOPB?
Texas Instruments specifies a 25 Ω feedback resistor for unity-gain (G = +1) configurations of LMH6654MFX/NOPB - not a direct short - to dampen parasitic inductance at the inverting input and prevent peaking or oscillation. This value is validated in all typical performance plots and ensures optimal 0.1 dB flatness (18 MHz) and phase margin (50°). Using higher values (e.g., >100 Ω) degrades stability and increases settling time.
How does LMH6654MFX/NOPB perform driving capacitive loads?
LMH6654MFX/NOPB exhibits reduced phase margin with capacitive loads, risking overshoot or oscillation. TI recommends adding a series isolation resistor (RISO) between the output and load capacitance - typically 25 Ω to 50 Ω - to restore stability. The datasheet provides RISO vs. CL curves (Figure 39) showing 50 Ω suppresses peaking for ≤100 pF loads. Without RISO, stability is only guaranteed for CL ≤ 10 pF.
Is LMH6654MFX/NOPB pin-compatible with other SOT-23-5 op-amps like OPA837 or ADA4897-1?
No, LMH6654MFX/NOPB is not pin-compatible with OPA837 or ADA4897-1. While all three use SOT-23-5 packages, their pinouts differ: LMH6654MFX/NOPB assigns Pin 1 to OUTPUT, Pin 2 to V−, Pin 3 to +IN, Pin 4 to −IN, Pin 5 to V+; OPA837 uses Pin 1 = V+, Pin 2 = −IN, Pin 3 = +IN, Pin 4 = OUTPUT, Pin 5 = V−; ADA4897-1 uses Pin 1 = OUTPUT, Pin 2 = −IN, Pin 3 = +IN, Pin 4 = V−, Pin 5 = V+. PCB redesign is required for substitution.
LMH6654MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 200V/µs
- Gain Bandwidth Product:
- 260 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 4.5mA
- Current - Output / Channel:
- 120 mA
- Voltage - Supply Span (Min):
- 4.5 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
LMH6654MFX/NOPB FAQ
1.How can I place an order for LMH6654MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6654MFX/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 LMH6654MFX/NOPB reliable?
The price and inventory of LMH6654MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6654MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6654MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6654MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6654MFX/NOPB?
LMH6654MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6654MFX/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 LMH6654MFX/NOPB?
For technical support, including LMH6654MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6654MFX/NOPB requirements.
6.How does Aetrix verify that LMH6654MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6654MFX/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 LMH6654MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6654MFX/NOPB?
All LMH6654MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6654MFX/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 LMH6654MFX/NOPB part is unused and in its original packaging.
Return procedure for LMH6654MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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