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Texas Instruments LMH6629SDE/NOPB
- Part No.:
- LMH6629SDE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LMH6629SDE/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:188
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Product details
Overview
LMH6629SDE/NOPB from Texas Instruments is an ultra-low-noise, high-speed voltage-feedback operational amplifier in WSON-8 package, delivering 0.69 nV/√Hz input voltage noise, 900 MHz −3dB bandwidth at AV = 10 V/V, and ±250 mA output drive capability - enabling precision wideband signal conditioning in ultrasound pre-amps and transimpedance amplifiers.
For engineers reviewing the LMH6629SDE/NOPB datasheet, LMH6629SDE/NOPB pinout, LMH6629SDE/NOPB application, or LMH6629SDE/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 rail-to-rail output swing within 0.8 V of supplies on 2.7–5.5 V operation.
Technical Context
The LMH6629SDE/NOPB uses a proprietary SiGe process to achieve simultaneous high bandwidth and ultra-low noise. Its internal compensation architecture allows user-selectable stability for minimum gains of 4 V/V (COMP = LO) or 10 V/V (COMP = HI), eliminating external compensation capacitors required by competing amplifiers.
It features a shutdown function (PD pin) with fast 75 ns enable/disable timing and supports single-supply operation with input common-mode range extending 0.3 V below ground and output swing to within 0.8 V of rails - critical for DC-coupled instrumentation and medical imaging front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3dB Bandwidth | 900 MHz at AV = 10 V/V, RL = 100 Ω - enables RF and optical signal chain designs up to UHF frequencies |
| Input Voltage Noise | 0.69 nV/√Hz - preserves SNR in low-level sensor interfaces like photodiode TIA stages |
| Slew Rate | 1600 V/μs - supports clean 2 VPP large-signal step response without distortion at >100 MHz |
| 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 while maintaining full AC performance |
| Enable Time | 75 ns - allows rapid power cycling in time-gated applications such as pulsed ultrasound receivers |
| HD2 / HD3 | −90 dBc / −94 dBc at 1 MHz, 2 VPP - meets stringent linearity requirements in base-station and test equipment |
Pinout & Package
LMH6629SDE/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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PD | Digital input | Active-low power-down control; pulls supply current from 15.5 mA to 1.1 mA when asserted |
| 2 - FB | Feedback node | Internal connection to output for unity-gain stable configurations; used in non-inverting gain setups |
| 3 - IN+ | Analog input | Non-inverting input with 1.7 pF common-mode capacitance and 450 kΩ input resistance |
| 4 - IN− | Analog input | Inverting input; accepts differential or single-ended signals with CMVR extending to −0.3 V |
| 5 - V− | Power supply | Negative supply rail; supports single-supply operation down to ground or dual-supply ±2.5 V |
| 6 - COMP | Digital input | Selects internal compensation: LO = min gain 4 V/V, HI = min gain 10 V/V |
| 7 - OUT | Analog output | Capable of ±250 mA sink/source into 100 Ω load; swings to within 0.8 V of either rail |
| 8 - V+ | Power supply | Positive supply rail; operates from 2.7 V to 5.5 V with PSRR > 78 dB up to 100 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Selectable minimum gain | Configurable 4 V/V or 10 V/V stability via COMP pin - eliminates external compensation components and layout sensitivity |
| Ultra-low noise floor | 0.69 nV/√Hz + 2.6 pA/√Hz - enables high-gain, low-noise transimpedance amplification without degrading SNR |
| Rail-to-rail output swing | 0.8 V headroom to both rails at ±250 mA - maximizes dynamic range in single-supply 3.3 V or 5 V systems |
| Fast enable/disable | 75 ns enable / 80 ns disable timing - supports burst-mode operation in portable medical and test instrumentation |
| High linearity | HD2/HD3 = −90/−94 dBc at 1 MHz - ensures fidelity in wideband active filters and IF amplifiers |
Applications
| Ultrasound Pre-amplifiers | Transimpedance Amplifiers |
|---|---|
Use Scenario: Amplifying weak, high-frequency echo signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier with selectable gain and fast settling for time-of-flight measurement. Use Value: 0.69 nV/√Hz noise and 900 MHz bandwidth preserve signal integrity across 1–15 MHz imaging bands. | Use Scenario: Converting photocurrent from avalanche photodiodes in optical receivers and LiDAR front-ends. IC Role / Device Role / Timing Role: High-speed, low-noise transimpedance amplifier with programmable gain and shutdown for power gating. Use Value: ±250 mA output drive supports low-RF feedback networks; 75 ns enable allows synchronous detection. |
| Wideband Active Filters | Base-Station Amplifiers |
Use Scenario: Implementing 5th-order Butterworth or Chebyshev filters in RF test equipment requiring flat group delay. IC Role / Device Role / Timing Role: High-gain, high-linearity op-amp in multiple-feedback or state-variable topologies. Use Value: −90 dBc HD2 at 1 MHz and 0.1 dB bandwidth of 330 MHz ensure minimal passband distortion. | Use Scenario: Intermediate-frequency (IF) amplification in LTE and 5G small-cell base stations with tight ACLR specs. IC Role / Device Role / Timing Role: Low-distortion, wideband gain block operating from 10 MHz to 300 MHz. Use Value: OIP3 of 31 dBm at 25 MHz and PSRR > 78 dB suppress supply-induced intermodulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6624MA/NOPB | Higher noise (1.0 nV/√Hz), no shutdown, fixed gain ≥5, SOT-23-5 only | Lacks PD pin and COMP flexibility; limited to space-constrained, always-on designs | Choose when board area is critical and gain ≥5 suffices without power gating |
| OPA847IDR | Lower bandwidth (3.9 GHz GBW but 400 MHz −3dB), higher noise (0.85 nV/√Hz), no COMP pin | Optimized for very high closed-loop gain (>20 V/V); less flexible for low-gain, wideband use | Prefer when targeting >20 V/V gain with moderate bandwidth and no need for gain selection |
Compared with LMH6629SDE/NOPB, LMH6624MA/NOPB trades shutdown and gain selectability for smaller footprint, while OPA847IDR offers higher GBW but sacrifices low-gain stability and noise performance - making LMH6629SDE/NOPB optimal for adaptive, low-noise, wideband gain stages.
Availability
LMH6629SDE/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 original stock traceability.
Supply support for LMH6629SDE/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 amplifiers and signal-chain solutions.
The LMH6629 product line targets ultra-low-noise, high-speed analog front-ends for medical imaging, optical sensing, and communications infrastructure - emphasizing simultaneous bandwidth, linearity, and power efficiency.
FAQ
What is the minimum stable gain configuration for LMH6629SDE/NOPB?
The LMH6629SDE/NOPB supports two internally compensated minimum gains: 4 V/V when the COMP pin is pulled low, and 10 V/V when COMP is high. This eliminates external compensation components and allows design flexibility across different gain requirements without sacrificing stability. The WSON-8 package enables this selection, unlike the SOT-23-5 variant which is fixed at ≥10 V/V.
Does LMH6629SDE/NOPB support true single-supply operation?
Yes, LMH6629SDE/NOPB supports true single-supply operation from 2.7 V to 5.5 V. Its input common-mode range extends to −0.3 V (below ground) and output swings to within 0.8 V of both rails - enabling DC-coupled configurations in 3.3 V or 5 V systems without level-shifting circuitry. This is confirmed under recommended operating conditions across −40°C to +125°C.
How does the power-down feature affect supply current in LMH6629SDE/NOPB?
When the PD pin is driven low, LMH6629SDE/NOPB enters shutdown mode and reduces supply current from 15.5 mA (typical, normal operation) to 1.1 mA (typical, 3.3 V supply) or 1.85 mA (typical, 5 V supply). This 93% reduction enables significant power savings in battery-powered or burst-mode systems such as portable ultrasound scanners.
What is the maximum output current capability of LMH6629SDE/NOPB?
LMH6629SDE/NOPB delivers ±250 mA continuous linear output current into a 100 Ω load terminated at mid-supply, verified at 25°C and across −40°C to +125°C. This enables direct driving of 50 Ω cables, active filter stages, and low-impedance sensor interfaces without external buffers - a key advantage over standard op-amps rated for <100 mA.
Can LMH6629SDE/NOPB be used in transimpedance amplifier configurations?
Yes, LMH6629SDE/NOPB is explicitly validated for transimpedance amplifier (TIA) use, with design guidance in TI's application notes and typical performance curves showing optimized CF compensation (e.g., 0.6 pF series). Its 0.69 nV/√Hz noise, 900 MHz bandwidth, and low input bias current (±23 µA max) make it ideal for high-gain, wideband photodiode and current-output sensor interfaces.
LMH6629SDE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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:
- 900 MHz
- 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:
- 8-WSON (3x3)
LMH6629SDE/NOPB FAQ
1.How can I place an order for LMH6629SDE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6629SDE/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 LMH6629SDE/NOPB reliable?
The price and inventory of LMH6629SDE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6629SDE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6629SDE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6629SDE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6629SDE/NOPB?
LMH6629SDE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6629SDE/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 LMH6629SDE/NOPB?
For technical support, including LMH6629SDE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6629SDE/NOPB requirements.
6.How does Aetrix verify that LMH6629SDE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6629SDE/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 LMH6629SDE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6629SDE/NOPB?
All LMH6629SDE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6629SDE/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 LMH6629SDE/NOPB part is unused and in its original packaging.
Return procedure for LMH6629SDE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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