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Texas Instruments LMH6628MAX/NOPB
- Part No.:
- LMH6628MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6628MAX/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,543
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Product details
Overview
LMH6628MAX/NOPB from Texas Instruments is a dual, wideband, low-noise voltage feedback operational amplifier in an 8-pin SOIC package, delivering 300MHz unity-gain bandwidth, 2nV/√Hz input voltage noise, and 12ns settling time to 0.1% - enabling high-fidelity signal conditioning in I/Q channel amplifiers, anti-aliasing buffers for high-resolution ADCs, and fast peak detectors.
For engineers reviewing the LMH6628MAX/NOPB datasheet, LMH6628MAX/NOPB pinout, LMH6628MAX/NOPB application, or LMH6628MAX/NOPB equivalent, key selection criteria include its matched dual-channel performance, ±85mA output drive, ±2.5V to ±6V supply flexibility, and low harmonic distortion (−65/−74dBc at 10MHz) in high-speed analog front-ends.
Technical Context
The LMH6628MAX/NOPB implements a traditional voltage-feedback architecture with unity-gain stability and VIP10™ complementary bipolar process optimization. Its two tightly matched channels share identical AC/DC specifications - including 300MHz −3dB bandwidth at AV = +1, 2nV/√Hz voltage noise, and 300–550V/µs slew rate - enabling precise differential signal processing without inter-channel skew.
It operates across −40°C to +85°C with ±2.5V to ±6V dual supplies (or 5V–12V single supply), supports ±3.5V output swing into 100Ω, and features 500kΩ common-mode input resistance and 0.1Ω closed-loop output impedance - critical for driving transmission lines and active filter topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 300MHz - enables stable operation with gain ≥1 and preserves signal integrity up to VHF frequencies. |
| Input Voltage Noise | 2nV/√Hz - minimizes added noise in low-level signal amplification, e.g., sensor interfaces and preamp stages. |
| Settling Time | 12ns to 0.1% - ensures accurate sampling of fast transients in ADC buffer and pulse detection applications. |
| Output Current | ±85mA - drives heavy loads such as 50Ω cables or multiple downstream inputs without gain compression. |
| Harmonic Distortion | −65dBc (2nd), −74dBc (3rd) at 10MHz - maintains spectral purity in communication I/Q paths and RF signal chains. |
| Supply Range | ±2.5V to ±6V - accommodates both low-voltage portable systems and higher-headroom industrial signal chains. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded and instrumentation environments. |
Pinout & Package
LMH6628MAX/NOPB is housed in an 8-pin SOIC (D) package per JEDEC MS-012 variation AA, with 1.27mm pitch, 3.91mm body width, and 4.9mm body length. Pin 1 is marked by a beveled corner and located at the top-left when viewing the top side with the marking side up and the bevel to the upper-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node for negative feedback configuration; requires low-parasitic layout to avoid peaking. |
| 2 | Non-Inverting Input (Channel A) | High-impedance reference input; matching trace length to Pin 1 minimizes common-mode rejection degradation. |
| 3 | Output (Channel A) | Low-impedance buffered output capable of ±85mA; series resistor recommended for capacitive load stability. |
| 4 | Negative Supply (V−) | Power rail return for both channels; requires local 0.1µF ceramic bypass capacitor to ground. |
| 5 | Non-Inverting Input (Channel B) | Independent high-Z input for second channel; electrically matched to Pins 1 and 2 within 0.1mV offset. |
| 6 | Inverting Input (Channel B) | Second channel's feedback node; symmetry with Pin 1 enables balanced differential driver/receiver designs. |
| 7 | Output (Channel B) | Matched output stage to Pin 3; supports independent loading or parallel connection for increased drive capability. |
| 8 | Positive Supply (V+) | Main power rail; decoupling must be placed adjacent to this pin to suppress high-frequency supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel matching | Typical input offset voltage mismatch <0.5mV and gain-bandwidth tracking <1% - enables precision I/Q signal paths without calibration. |
| Low-noise voltage feedback | 2nV/√Hz input voltage noise combined with 2pA/√Hz current noise - optimized for resistive source impedances <1kΩ. |
| High-output drive | ±85mA continuous output current into 100Ω - eliminates need for external buffer stages in line-driver applications. |
| Fast settling & low distortion | 12ns to 0.1% with −65/−74dBc harmonic distortion at 10MHz - meets requirements for 12-bit+ ADC input buffering. |
| Wide supply range | Operates from ±2.5V to ±6V - supports both battery-powered portables and industrial ±5V systems without redesign. |
Applications
| I/Q Channel Amplifier | Anti-Aliasing ADC Buffer |
|---|---|
|
Use Scenario: Simultaneous amplification of in-phase and quadrature baseband signals in direct-conversion receivers. IC Role / Device Role / Timing Role: Dual-channel voltage feedback op amp providing matched gain, phase, and group delay across both paths. Use Value: Maintains <0.1° phase mismatch and <0.5mV offset mismatch between channels - preserving EVM in QAM-64/256 systems. |
Use Scenario: Driving the analog input of a 14-bit, 100MSPS ADC in data acquisition systems. IC Role / Device Role / Timing Role: High-speed unity-gain buffer isolating ADC input capacitance from preceding filter stage. Use Value: 12ns settling to 0.1% ensures full-scale step accuracy before next sample clock edge - preventing aperture uncertainty errors. |
| Full-Duplex Coaxial Transceiver | Active Low-Noise Filter |
|
Use Scenario: Bidirectional analog video or control signal transmission over single coaxial cable in industrial PLCs. IC Role / Device Role / Timing Role: One channel acts as line driver, the other as differential receiver rejecting common-mode interference. Use Value: >60dB CMRR at 10MHz enables simultaneous 1MHz and 10MHz signal reception - verified in TI Application Note SNOSA02D Figure 31. |
Use Scenario: Implementing 4th-order low-pass filtering in medical ultrasound front-ends with minimal added noise. IC Role / Device Role / Timing Role: Dual op amp configured as cascaded Sallen-Key stages with shared bias network. Use Value: 2nV/√Hz input noise dominates filter thermal noise - achieving <1.5µVrms integrated output noise in 10MHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher GBW (450MHz), lower noise (1.4nV/√Hz), but narrower supply range (±2.7V to ±5.5V) and no SOIC packaging. | Preferred for >200MHz closed-loop designs where layout allows QFN-8; not drop-in compatible due to different package and thermal pad. | Select LMH6629MA/NOPB only when 300MHz bandwidth is insufficient and board redesign for thermal management is feasible. |
| ADA4898-2ARZ | Lower noise (1.1nV/√Hz), wider supply (±3V to ±12V), but slower settling (25ns to 0.1%) and higher quiescent current (15mA/channel). | Better suited for ultra-low-noise DC-coupled instrumentation; less optimal for fast transient capture or RF IF stages. | Choose ADA4898-2ARZ when sub-1.2nV/√Hz noise is mandatory and speed requirements are ≤50MHz. |
Compared with LMH6628MAX/NOPB, LMH6629MA/NOPB trades SOIC compatibility and supply flexibility for higher speed and lower noise, while ADA4898-2ARZ prioritizes noise floor over settling speed - making LMH6628MAX/NOPB the optimal balance of bandwidth, noise, package maturity, and industrial temperature support.
Availability
LMH6628MAX/NOPB is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure, and industrial test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant tape-and-reel delivery.
Supply support for LMH6628MAX/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 connectivity technologies, with decades of expertise in high-performance op amps and signal chain solutions.
The LMH6628MAX/NOPB belongs to TI's high-speed voltage-feedback op amp product line, engineered specifically for wide-dynamic-range, low-distortion analog signal processing in communications, instrumentation, and imaging systems.
FAQ
What is the maximum operating junction temperature for LMH6628MAX/NOPB?
The LMH6628MAX/NOPB has a maximum junction temperature of +150°C, as specified in the Absolute Maximum Ratings table. Its SOIC package exhibits θJA = 145°C/W and θJC = 65°C/W, meaning thermal design must ensure ambient temperature and power dissipation keep TJ ≤ 150°C - for example, at 18mA total supply current and 5V supply, PD ≈ 90mW, allowing ~13°C rise above ambient under typical PCB conditions.
Does LMH6628MAX/NOPB support single-supply operation?
Yes, LMH6628MAX/NOPB supports single-supply operation from 5V to 12V, as confirmed in the datasheet's DESCRIPTION and Operating Ratings sections. With a 5V supply, it achieves ±2.5V output swing into high-Z loads; for rail-to-rail input/output, external level-shifting or biasing is required since its input common-mode range extends to within 1.3V of rails and output swings to within 1.5V of rails.
Is LMH6628MAX/NOPB pin-compatible with CLC428?
Yes, LMH6628MAX/NOPB is explicitly documented as an improved replacement for CLC428 in the datasheet's FEATURES section, and both devices use identical 8-pin SOIC (D) packages with matching pin functions - including V+, V−, dual in/out assignments - enabling direct PCB-level substitution without layout changes.
What evaluation board is recommended for LMH6628MAX/NOPB?
The CLC730036 evaluation board is officially supported for LMH6628MAX/NOPB, as stated in the datasheet's "To reduce design times…" paragraph. It provides solderable SOIC-8 footprints, optimized high-frequency layout, and configurable gain/test points - enabling rapid validation of bandwidth, settling, and crosstalk performance per SNOSA02D test conditions.
How does LMH6628MAX/NOPB handle capacitive loads?
LMH6628MAX/NOPB can drive capacitive loads up to ~100pF stably in unity-gain configuration; beyond that, oscillation risk increases. The datasheet recommends adding a small series resistor (e.g., 10–50Ω) between the output pin and the capacitive load to isolate the op amp's output impedance from the load capacitance - a technique validated in Figure 22 and Application Section "OUTPUT AND SUPPLY CONSIDERATIONS".
LMH6628MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 550V/µs
- Gain Bandwidth Product:
- 200 MHz
- -3db Bandwidth:
- 300 MHz
- Current - Input Bias:
- 700 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 9mA (x2 Channels)
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMH6628MAX/NOPB FAQ
1.How can I place an order for LMH6628MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6628MAX/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 LMH6628MAX/NOPB reliable?
The price and inventory of LMH6628MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6628MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6628MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6628MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6628MAX/NOPB?
LMH6628MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6628MAX/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 LMH6628MAX/NOPB?
For technical support, including LMH6628MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6628MAX/NOPB requirements.
6.How does Aetrix verify that LMH6628MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6628MAX/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 LMH6628MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6628MAX/NOPB?
All LMH6628MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6628MAX/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 LMH6628MAX/NOPB part is unused and in its original packaging.
Return procedure for LMH6628MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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