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Texas Instruments LMH6624MFX/NOPB
- Part No.:
- LMH6624MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6624MFX/NOPB.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,548
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Product details
Overview
LMH6624MFX/NOPB from Texas Instruments is a single-channel ultra-low-noise, wideband voltage-feedback operational amplifier in SOT-23-5 package, delivering 1.5 GHz gain bandwidth, 0.92 nV/√Hz input voltage noise, and 350 V/μs slew rate at ±6 V supply. It operates from ±2.5 V to ±6 V dual supply or 5 V to 12 V single supply, and is optimized for high-fidelity signal conditioning in ultrasound pre-amplifiers and instrumentation sense amplifiers.
For engineers reviewing the LMH6624MFX/NOPB datasheet, LMH6624MFX/NOPB pinout, LMH6624MFX/NOPB application, or LMH6624MFX/NOPB equivalent, key selection criteria include its 0.92 nV/√Hz noise floor, stability at closed-loop |AV| ≥10, ±700 µV max input offset over temperature, 350 V/μs slew rate (AV = 20), and SOT-23-5 thermal resistance of 265 °C/W - all critical for low-distortion, wide-dynamic-range analog front-ends.
Technical Context
The LMH6624MFX/NOPB employs a traditional voltage-feedback topology with balanced differential inputs, enabling precise dc accuracy (±700 µV VOS max, ±0.2 µV/°C drift) alongside wide ac performance (1.5 GHz GBW, −63 dBc HD2 at 10 MHz). Its architecture supports stable operation with closed-loop gains ≥10 in both inverting and non-inverting configurations without external compensation.
It achieves ultra-low noise via optimized input transistor design (0.92 nV/√Hz, 2.3 pA/√Hz), while maintaining high output drive capability (±1.5 V swing into 100 Ω, 100 mA sourcing/sinking) and robust power supply rejection (82–88 dB PSRR) across ±2.5 V to ±6 V operating range - making it suitable for sensitive, high-bandwidth sensor interfaces where SNR and linearity are paramount.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 1.5 GHz - enables stable closed-loop operation up to 100 MHz with gain ≥10, supporting wideband active filtering and RF signal chain stages. |
| Input Voltage Noise | 0.92 nV/√Hz - sets fundamental SNR limit for low-level signal amplification in ultrasound and magnetic storage pre-amps. |
| Slew Rate (AV = 20) | 350 V/μs - ensures faithful reproduction of fast transient signals (e.g., pulse-echo ultrasound waveforms) without slew-induced distortion. |
| Input Offset Voltage (max) | ±700 µV over −40°C to +125°C - guarantees minimal dc error accumulation in precision DC-coupled gain stages. |
| Supply Range | ±2.5 V to ±6 V dual or 5 V to 12 V single - provides flexibility for battery-powered portable diagnostics and industrial 5 V/12 V systems. |
| Harmonic Distortion | −63 dBc HD2 / −80 dBc HD3 at 10 MHz - preserves signal integrity in high-frequency instrumentation requiring >60 dB spurious-free dynamic range. |
| Output Current | ±100 mA - drives low-impedance loads (e.g., 50 Ω cables, ADC input buffers) without gain compression or clipping. |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm body size), surface-mount, thermally enhanced for high-speed op-amp applications requiring low parasitic inductance and compact layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Output | Amplified single-ended output node; capable of ±1.5 V swing into 100 Ω with <10 mΩ output impedance below 100 kHz. |
| 2: V− | Negative Supply | Return path for internal bias current and output stage sink; must be decoupled with low-ESR capacitor near pin. |
| 3: +IN | Non-inverting Input | High-impedance (6.6 MΩ common-mode) input node; connects to reference or sensor high-side in differential-sense topologies. |
| 4: −IN | Inverting Input | Differential input node with matched 4.6 kΩ differential resistance; used for feedback network connection in transimpedance or inverting gain configurations. |
| 5: V+ | Positive Supply | Power rail for output stage sourcing; requires local 0.1 µF ceramic + 10 µF tantalum decoupling for broadband stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 0.92 nV/√Hz enables detection of sub-microvolt signals in medical ultrasound and tape head pre-amplification. |
| Stable for |AV| ≥10 | No external compensation required for closed-loop gains of 10× or higher, simplifying PCB layout and reducing component count. |
| Low input offset drift | ±0.2 µV/°C ensures <1.5 µV total offset shift across full −40°C to +125°C industrial temperature range - critical for uncalibrated embedded sensors. |
| High slew rate with low distortion | 350 V/μs slew rate combined with −63 dBc HD2 at 10 MHz allows clean amplification of fast-rising pulses without harmonic corruption. |
| Wide supply range compatibility | Operates from ±2.5 V to ±6 V dual or 5 V to 12 V single supply - supports legacy 5 V systems and modern low-voltage portable designs without level-shifting. |
Applications
| Ultrasound Pre-amps | Instrumentation Sense Amplifiers |
|---|---|
Use Scenario: Amplifying weak, high-frequency echo signals (1–15 MHz) from piezoelectric transducers in portable diagnostic imaging systems. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier in analog front-end; provides gain before ADC sampling at 40+ MSPS. Use Value: 0.92 nV/√Hz noise floor maximizes SNR for improved image resolution and tissue contrast at depth. | Use Scenario: Precision amplification of millivolt-level outputs from strain gauges, RTDs, or current-sense shunts in industrial process controllers. IC Role / Device Role / Timing Role: High-gain, DC-stable signal conditioner with minimal offset drift and excellent CMRR (>90 dB). Use Value: ±700 µV max VOS over temperature eliminates need for frequent system recalibration in field-deployed equipment. |
| Magnetic Tape & Disk Pre-amps | Professional Audio Systems |
Use Scenario: Recovering high-frequency analog data from magnetic read heads in archival storage subsystems operating up to 50 MHz. IC Role / Device Role / Timing Role: Wideband, low-distortion gain block in playback channel; interfaces directly with equalization filters. Use Value: 1.5 GHz GBW and −80 dBc HD3 at 10 MHz preserve harmonic fidelity of encoded analog waveforms during playback. | Use Scenario: Line-level signal distribution and buffering in studio-grade microphone preamplifiers and digital audio workstations. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer between mic pre-stage and A/D converter or DSP interface. Use Value: 350 V/μs slew rate prevents transient intermodulation distortion on percussive audio transients (e.g., drum hits), preserving transient clarity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-noise wideband op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MF/NOPB | Lower 0.69 nV/√Hz noise, 2.2 GHz GBW, but requires external compensation for gains <20 and uses same SOT-23-5 package. | Better suited for >20 MHz signal chains demanding lowest possible noise; less tolerant of layout parasitics due to higher bandwidth. | Select LMH6629MF/NOPB only when noise budget is tighter than 0.92 nV/√Hz and system gain ≥20 can be guaranteed. |
| OPA847IDBVR | 0.85 nV/√Hz noise, 3.9 GHz GBW, but higher 18 mA supply current and requires careful layout for stability at high gains. | Targeted at RF/IF gain blocks and optical receiver TIA stages where bandwidth exceeds 500 MHz. | Choose OPA847IDBVR when system bandwidth requirement exceeds 1 GHz and power consumption is secondary to noise and speed. |
Compared with LMH6624MFX/NOPB, LMH6629MF/NOPB offers lower noise and higher bandwidth but reduced gain stability margin, while OPA847IDBVR delivers superior speed at significantly higher quiescent power - making LMH6624MFX/NOPB the optimal balance of noise, stability, and power for general-purpose wideband instrumentation.
Availability
LMH6624MFX/NOPB is available at Aetrix Electronics and suitable for ultrasound pre-amplifiers, instrumentation sense amplifiers, and professional audio systems requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LMH6624MFX/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 company headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and communications markets.
The LMH6624MFX/NOPB belongs to TI's high-speed precision op-amp product line, engineered specifically for applications demanding simultaneous ultra-low noise, wide bandwidth, and dc accuracy - such as medical imaging, test equipment, and high-fidelity signal acquisition.
FAQ
What is the maximum recommended supply voltage for LMH6624MFX/NOPB?
The absolute maximum supply voltage (V+ − V−) for LMH6624MFX/NOPB is 13.2 V, but the recommended operating range is ±2.25 V to ±6.3 V in dual-supply mode or 5 V to 12 V in single-supply configuration. Operating beyond ±6 V risks exceeding junction temperature limits under load, and TI specifies guaranteed performance only within the ±2.5 V to ±6 V range per the datasheet electrical characteristics tables. LMH6624MFX/NOPB must not be operated continuously above ±6 V without thermal derating analysis.
Does LMH6624MFX/NOPB require external compensation for unity-gain stability?
No, LMH6624MFX/NOPB is not unity-gain stable. The datasheet explicitly states it is "stable for closed loop |AV| ≥10", meaning minimum closed-loop gain of 10× is required for unconditional stability. Attempting unity-gain or gain-of-2 configurations will cause peaking or oscillation. For lower-gain applications, external compensation (e.g., dominant-pole capacitor in feedback path) or alternative op-amps like OPA837 must be used. LMH6624MFX/NOPB's internal compensation is optimized for high-speed, high-gain precision use cases.
What is the input bias current specification for LMH6624MFX/NOPB?
The input bias current for LMH6624MFX/NOPB is specified as ±20 µA maximum at 25°C and ±25 µA over −40°C to +125°C, with an average drift of 12 nA/°C. This relatively high bias current (compared to FET-input op-amps) reflects its bipolar input stage, which enables ultra-low voltage noise. Designers must account for this in high-impedance sensor interfaces by using matched source impedances or guard traces. LMH6624MFX/NOPB's input offset current is ±2.0 µA max over temperature, further confirming its bipolar architecture.
Can LMH6624MFX/NOPB drive a 50 Ω load directly?
Yes, LMH6624MFX/NOPB can drive a 50 Ω load directly, delivering ±1.1 V output swing into 100 Ω and ±1.5 V into open circuit at ±6 V supply. While not characterized explicitly into 50 Ω in the datasheet, its 100 mA sourcing/sinking capability and 10 mΩ output impedance below 100 kHz confirm sufficient drive strength. However, for optimal bandwidth and distortion performance into 50 Ω, a series 22–47 Ω isolation resistor is recommended to dampen potential peaking caused by cable capacitance. LMH6624MFX/NOPB's output stage is robust enough for direct 50 Ω termination in most lab and instrumentation setups.
Is LMH6624MFX/NOPB RoHS-compliant and lead-free?
Yes, LMH6624MFX/NOPB is RoHS-compliant and lead-free. The "/NOPB" suffix explicitly denotes "No Lead (Pb)-Free" per TI's packaging nomenclature, indicating compliance with EU Directive 2011/65/EU (RoHS 2) and JEDEC J-STD-609 standards. The device uses matte tin (Sn) lead finish on its SOT-23-5 package terminals and contains no intentionally added lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). LMH6624MFX/NOPB is suitable for lead-free reflow soldering processes with peak temperatures up to 260°C.
LMH6624MFX/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:
- 400V/µs
- Gain Bandwidth Product:
- 1.5 GHz
- -3db Bandwidth:
- 95 MHz
- Current - Input Bias:
- 13 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 12mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMH6624MFX/NOPB FAQ
1.How can I place an order for LMH6624MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6624MFX/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 LMH6624MFX/NOPB reliable?
The price and inventory of LMH6624MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6624MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6624MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6624MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6624MFX/NOPB?
LMH6624MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6624MFX/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 LMH6624MFX/NOPB?
For technical support, including LMH6624MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6624MFX/NOPB requirements.
6.How does Aetrix verify that LMH6624MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6624MFX/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 LMH6624MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6624MFX/NOPB?
All LMH6624MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6624MFX/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 LMH6624MFX/NOPB part is unused and in its original packaging.
Return procedure for LMH6624MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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