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Texas Instruments LMH6629MFE/NOPB
- Part No.:
- LMH6629MFE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMH6629MFE/NOPB.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:282
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Product details
Overview
LMH6629MFE/NOPB from Texas Instruments is an ultra-low-noise, high-speed voltage-feedback operational amplifier in WSON-8 package, featuring 0.69 nV/√Hz input voltage noise, 900 MHz −3dB bandwidth at AV = 10 V/V, and ±250 mA output drive capability-designed for transimpedance amplifiers, ultrasound pre-amps, and wideband active filters.
For engineers reviewing the LMH6629MFE/NOPB datasheet, LMH6629MFE/NOPB pinout, LMH6629MFE/NOPB application, or LMH6629MFE/NOPB equivalent, key selection criteria include its selectable minimum gain (≥4 or ≥10 V/V via COMP pin), 75 ns enable time, 1600 V/μs slew rate, and operation on 2.7–5.5 V single supply with rail-to-rail output swing within 0.8 V of rails.
Technical Context
The LMH6629MFE/NOPB uses a proprietary SiGe process to achieve ultra-low noise and high bandwidth while maintaining stability across gain configurations. Its internal compensation is user-selectable via the COMP pin (low = min gain 4 V/V; high = min gain 10 V/V), eliminating external compensation capacitors required by competing amplifiers.
It supports true single-supply operation with input common-mode range extending 0.3 V below ground and output swing to within 0.8 V of both rails. The PD (power-down) pin enables fast 75 ns activation and 80 ns deactivation, critical for power-gated signal chains in portable medical and test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 900 MHz at AV = 10 V/V, RL = 100 Ω - enables RF and high-frequency analog front-ends up to UHF band |
| Input Voltage Noise | 0.69 nV/√Hz - preserves SNR in low-level signal amplification (e.g., photodiode/TIA stages) |
| Slew Rate | 1600 V/μs - supports clean large-signal transient response without slewing distortion |
| Output Current | ±250 mA - drives heavy loads including 50 Ω transmission lines and active filter networks |
| Supply Range | 2.7 V to 5.5 V - compatible with modern low-voltage systems and battery-powered instrumentation |
| Enable Time | 75 ns - allows rapid power cycling in time-multiplexed sensor interfaces |
| HD2 / HD3 | −90 dBc / −94 dBc at 1 MHz, 2 VPP - ensures minimal harmonic contamination in precision AC-coupled paths |
Pinout & Package
LMH6629MFE/NOPB is housed in a 3.0 mm × 3.0 mm, 0.75 mm height, thermally enhanced WSON-8 package (NGQ08A) with exposed thermal pad for improved power dissipation (RθJA = 71 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 7) | Amplifier output | Delivers full ±250 mA drive into 100 Ω load; rail-to-rail swing supports single-supply dynamic range maximization |
| COMP (Pin 6) | Compensation control | Pull low for stable operation at AV ≥ 4 V/V; pull high for AV ≥ 10 V/V - eliminates need for external compensation components |
| PD (Pin 1) | Power-down enable | Active-low digital input; asserts shutdown mode drawing only 1.1–2.0 mA, enabling burst-mode operation |
| IN+ (Pin 4) | Non-inverting input | DC-coupled input with CMVR from −0.3 V to 3.8 V (5 V supply); supports ground-referenced sensors |
| IN− (Pin 3) | Inverting input | High-impedance node for feedback network connection; differential input capacitance = 4 pF |
| V− (Pin 5) | Negative supply | Accepts ground or negative rail; input common-mode extends 0.3 V below this rail |
| V+ (Pin 8) | Positive supply | Supports 2.7–5.5 V; PSRR = 78 dB ensures immunity to supply ripple in noisy environments |
| FB (Pin 2) | Feedback connection | Internal node for unity-gain stable configuration; used in non-inverting gain setups with external resistor network |
Key Features
| Feature | Design Value |
|---|---|
| Selectable minimum gain | Configurable stability for AV ≥ 4 V/V or ≥ 10 V/V via COMP pin - removes external compensation capacitor and layout sensitivity |
| Ultra-low input noise | 0.69 nV/√Hz + 2.6 pA/√Hz - enables high-gain, low-noise amplification in optical and ultrasound front-ends |
| Rail-to-rail output swing | Swings to within 0.8 V of both rails at full load - maximizes dynamic range in 5 V or 3.3 V single-supply systems |
| Fast enable/disable | 75 ns enable / 80 ns disable - supports microsecond-scale power gating in portable and battery-constrained applications |
| High output current | ±250 mA continuous drive - directly interfaces with 50 Ω cables, ADC drivers, and active filter stages without buffering |
Applications
| Ultrasound Pre-amplifiers | Transimpedance Amplifiers |
|---|---|
Use Scenario: Amplifying weak, high-frequency signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: Primary low-noise gain stage with wide bandwidth and low distortion to preserve echo timing fidelity and spatial resolution. Use Value: 0.69 nV/√Hz noise floor and −94 dBc HD3 at 1 MHz ensure detection of low-amplitude returning echoes without harmonic masking. | Use Scenario: Converting photocurrent from high-speed photodiodes in fiber-optic receivers or LiDAR systems. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable gain and fast settling for pulse-based optical detection. Use Value: 1600 V/μs slew rate and 900 MHz bandwidth support >100 MSPS signal acquisition with sub-ns rise time preservation. |
| Wideband Active Filters | Medical Imaging Signal Chains |
Use Scenario: Implementing 5th-order Chebyshev or elliptic filters in MRI gradient amplifiers and RF receive paths. IC Role / Device Role / Timing Role: High-linearity, low-phase-error op-amp in multiple feedback (MFB) or state-variable topologies. Use Value: −90 dBc HD2 and −94 dBc HD3 at 1 MHz minimize intermodulation artifacts in multi-tone imaging waveforms. | Use Scenario: Front-end conditioning of EEG, ECG, or neural probe signals in compact diagnostic devices. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier with shutdown for power-managed channel multiplexing. Use Value: ±800 µV max VOS over temperature and 75 ns enable time allow precise DC-coupled acquisition with minimal offset drift and fast channel switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6624MF/NOPB | Lower bandwidth (1.5 GHz SSBW), no COMP/PD pins, fixed gain ≥ 5 V/V, SOT-23-5 only | Lacks power-down and gain-select features; suited for always-on, space-constrained designs | Choose when board area is critical and gain is fixed ≥5 V/V; not suitable for burst-mode or gain-flexible systems |
| ADA4898-1ARZ | Higher VOS drift (±1.5 µV/°C), lower output current (±50 mA), no shutdown, SOIC-8 package | Better DC precision but insufficient drive for 50 Ω loads; lacks fast enable/disable | Prefer for low-frequency, high-DC-accuracy applications where output loading is light and power cycling is unnecessary |
Compared with LMH6629MFE/NOPB, LMH6624MF/NOPB offers higher small-signal bandwidth but sacrifices configurability and power control, while ADA4898-1ARZ provides superior DC specs at the cost of dynamic drive strength and system-level power management capability.
Availability
LMH6629MFE/NOPB is available at Aetrix Electronics and suitable for ultrasound pre-amps, transimpedance amplifiers, and wideband active filters requiring stable component supply, long-term manufacturability, and guaranteed TI production continuity.
Supply support for LMH6629MFE/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 decades of expertise in high-performance op-amps and signal chain solutions.
The LMH6629MFE/NOPB belongs to TI's LMH ultra-low-noise, high-speed op-amp family-engineered specifically for demanding applications in medical imaging, optical sensing, and test & measurement where noise, bandwidth, and output drive are co-critical.
FAQ
What is the minimum stable gain for LMH6629MFE/NOPB, and how is it configured?
The LMH6629MFE/NOPB supports two minimum stable gains: ≥4 V/V when the COMP pin is pulled low, and ≥10 V/V when COMP is pulled high. This internal compensation selection eliminates external capacitors and allows flexible gain design without stability trade-offs. The configuration is static and must be set before operation.
Does LMH6629MFE/NOPB support true single-supply operation with ground-referenced inputs?
Yes. LMH6629MFE/NOPB accepts input common-mode voltages down to −0.3 V (with 5 V supply), enabling direct interface with ground-referenced sensors and transducers. Its rail-to-rail output swings to within 0.8 V of both supply rails, preserving dynamic range in single-supply systems.
What is the typical supply current of LMH6629MFE/NOPB in normal and shutdown modes?
In normal operation (PD pin high or open), LMH6629MFE/NOPB draws 15.5 mA typical at 5 V. In shutdown mode (PD pin low), supply current drops to 1.1–2.0 mA across −40°C to +125°C, enabling significant power savings in duty-cycled systems.
Can LMH6629MFE/NOPB drive a 50 Ω load directly, and what is its large-signal bandwidth under that condition?
Yes. LMH6629MFE/NOPB delivers ±250 mA output current and is specified for RL = 100 Ω terminated to mid-supply-but it can directly drive 50 Ω loads with verified performance. At AV = 10 V/V and VO = 2 VPP, its large-signal −3dB bandwidth is 380 MHz into 100 Ω; derating for 50 Ω yields usable bandwidth >300 MHz.
How does the noise performance of LMH6629MFE/NOPB compare between voltage and current contributions in transimpedance applications?
LMH6629MFE/NOPB delivers 0.69 nV/√Hz voltage noise and 2.6 pA/√Hz current noise. In transimpedance amplifiers with feedback resistors >1 kΩ, voltage noise dominates; with Rf < 500 Ω, current noise becomes more significant. Its balanced noise profile makes it optimal for Rf = 1–10 kΩ photodiode interfaces.
LMH6629MFE/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:
- 1600V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 GHz
- Current - Input Bias:
- 15 µA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 15.5mA
- Current - Output / Channel:
- 250 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMH6629MFE/NOPB FAQ
1.How can I place an order for LMH6629MFE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6629MFE/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 LMH6629MFE/NOPB reliable?
The price and inventory of LMH6629MFE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6629MFE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6629MFE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6629MFE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6629MFE/NOPB?
LMH6629MFE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6629MFE/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 LMH6629MFE/NOPB?
For technical support, including LMH6629MFE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6629MFE/NOPB requirements.
6.How does Aetrix verify that LMH6629MFE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6629MFE/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 LMH6629MFE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6629MFE/NOPB?
All LMH6629MFE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6629MFE/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 LMH6629MFE/NOPB part is unused and in its original packaging.
Return procedure for LMH6629MFE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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