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Texas Instruments LMH6628MAX
- Part No.:
- LMH6628MAX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6628MAX.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,186
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Product details
Overview
LMH6628MAX from Texas Instruments is a dual, wideband, low-noise voltage-feedback operational amplifier in an 8-pin SOIC package. It delivers 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 and anti-aliasing buffers for high-resolution ADCs.
For engineers reviewing the LMH6628MAX datasheet, LMH6628MAX pinout, LMH6628MAX application, or LMH6628MAX equivalent, this page provides verified specifications, SOIC-8 terminal mapping, real-world use cases in transmission systems and active filters, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The LMH6628MAX implements a traditional voltage-feedback architecture with unity-gain stability across both channels, fabricated on TI's VIP10™ complementary bipolar process. Its matched dual topology supports differential line drivers/receivers and precision peak detectors without external trimming.
Each channel operates from ±2.5V to ±6V supplies, delivers ±85mA output current, and maintains −65/−74dBc harmonic distortion at 10MHz - critical for wide-dynamic-range analog front-ends in communication and instrumentation systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 300MHz - enables stable gain-of-1 operation up to VHF frequencies without compensation. |
| Input Voltage Noise | 2nV/√Hz - sets fundamental noise floor for low-amplitude signal amplification in sensor interfaces. |
| Settling Time | 12ns to 0.1% - ensures accurate sampling of fast transients before ADC conversion windows close. |
| Supply Voltage Range | ±2.5V to ±6V - supports single-supply (5V–12V) or dual-supply operation in mixed-signal systems. |
| Output Current | ±85mA - drives 100Ω loads with full ±3.2V swing, suitable for coaxial cable termination and active filter loads. |
| Harmonic Distortion | −65dBc (2nd), −74dBc (3rd) at 10MHz - preserves signal integrity in RF/IF chain stages where spectral purity is critical. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded systems and base station subsystems. |
Pinout & Package
LMH6628MAX is housed in an 8-pin SOIC (D) package with 1.27mm pitch, 3.9mm width, and 1.75mm max height per JEDEC MS-012 AA. Pin 1 is marked by a beveled corner and located in quadrant Q1 of the tape-and-reel carrier.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node for feedback network connection; requires low-parasitic layout to prevent peaking. |
| 2 | Non-Inverting Input (Channel A) | Reference point for single-ended or differential input; matched to Pin 1 for common-mode rejection. |
| 3 | Output (Channel A) | Capable of ±85mA drive into 100Ω; series resistor recommended for >100pF capacitive loads. |
| 4 | Negative Supply (V−) | Shared supply rail for both amplifiers; requires local 0.1µF ceramic bypass to ground. |
| 5 | Non-Inverting Input (Channel B) | Electrically identical to Pin 2; enables independent configuration of second channel. |
| 6 | Inverting Input (Channel B) | Matched to Pin 1; supports fully differential configurations when paired with Pins 2 and 5. |
| 7 | Output (Channel B) | Independent output stage; crosstalk to Channel A is −62dB at 10MHz (input-referred). |
| 8 | Positive Supply (V+) | Shared supply rail; decoupling must be placed within 2mm of Pin 8 and Pin 4 to minimize PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel matching | Channel-to-channel gain mismatch <0.1dB and phase mismatch <0.1° at 10MHz - enables precise I/Q signal processing without calibration. |
| Low distortion architecture | −65/−74dBc HD2/HD3 at 10MHz - reduces intermodulation products in full-duplex transmission systems. |
| High output drive | ±85mA short-circuit protected output - eliminates need for external buffer stages when driving 50Ω/75Ω lines. |
| Wide supply range | Operates from ±2.5V to ±6V - allows direct interface with legacy ±5V logic and modern low-voltage FPGAs. |
| SOIC-8 thermal performance | θJA = 145°C/W - supports continuous operation at 7.5mA/channel with ≤40°C ambient rise on standard FR-4 PCB. |
Applications
| High-Speed Differential Line Driver | I/Q Channel Amplifier |
|---|---|
|
Use Scenario: Transmitting baseband I and Q signals over twisted-pair or coaxial cable in software-defined radio front-ends. IC Role / Device Role / Timing Role: Dual-channel amplifier configured as matched driver (Channel A) and receiver (Channel B) in a full-duplex hybrid circuit. Use Value: −62dB input-referred crosstalk and 300MHz bandwidth preserve signal orthogonality and minimize inter-channel interference. |
Use Scenario: Amplifying in-phase and quadrature components in zero-IF receivers prior to ADC sampling. IC Role / Device Role / Timing Role: Simultaneous, tightly matched gain and phase response across both channels to maintain vector accuracy. Use Value: 0.1dB/0.1° channel matching at 10MHz ensures EVM degradation <0.5% in 64-QAM systems. |
| Anti-Aliasing Buffer for High-Resolution ADC | Low-Noise Active Filter Stage |
|
Use Scenario: Driving the input of a 16-bit, 100MSPS ADC in medical imaging or test equipment. IC Role / Device Role / Timing Role: Unity-gain stable buffer isolating filter output from ADC input capacitance and charge kickback. Use Value: 12ns settling to 0.1% prevents sampling error during aperture time; 2nV/√Hz noise avoids SNR degradation. |
Use Scenario: Implementing 4th-order low-pass filtering in ultrasound beamforming or spectrum analyzers. IC Role / Device Role / Timing Role: Dual op amp used in cascaded Sallen-Key and multiple-feedback topologies with shared bias networks. Use Value: Low 2pA/√Hz current noise minimizes resistor-generated thermal noise in high-Z filter nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher GBW (450MHz), lower noise (1.9nV/√Hz), but only available in SOIC-8 with higher quiescent current (13mA/ch). | Better suited for >200MHz IF amplification; less optimal for battery-powered systems due to 30% higher supply current. | Select LMH6629MA/NOPB when bandwidth headroom and noise margin outweigh power constraints. |
| ADA4898-2ARZ | Lower distortion (−84/−90dBc at 10MHz), rail-to-rail output, but narrower bandwidth (175MHz −3dB) and higher cost. | Preferred for DC-coupled precision instrumentation where harmonic suppression dominates over speed. | Choose ADA4898-2ARZ when THD specification is primary and 175MHz bandwidth suffices. |
Compared with LMH6628MAX, LMH6629MA/NOPB trades higher power for extended bandwidth and marginal noise improvement, while ADA4898-2ARZ sacrifices speed for ultra-low distortion and rail-to-rail capability - making LMH6628MAX the balanced choice for high-speed, low-noise, cost-sensitive dual-channel designs.
Availability
LMH6628MAX is available at Aetrix Electronics and suitable for high-speed data acquisition, RF front-end signal conditioning, and industrial instrumentation requiring stable component supply across long production lifecycles.
Supply support for LMH6628MAX 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 amp design and manufacturing.
The LMH6628MAX belongs to TI's high-speed voltage-feedback op amp product line, engineered specifically for wide-dynamic-range, low-distortion signal chains in communications, test equipment, and medical imaging systems.
FAQ
What is the maximum operating supply voltage for LMH6628MAX?
The LMH6628MAX has an absolute maximum supply voltage rating of ±6.75V (13.5V total), but its specified operating range is ±2.5V to ±6V. Operation at ±6V delivers full ±3.5V output swing into 100Ω loads, while maintaining 12ns settling and −65dBc distortion at 10MHz. Exceeding ±6V risks parametric shift and reduced reliability.
Does LMH6628MAX support single-supply operation?
Yes, LMH6628MAX supports single-supply operation from 5V to 12V. With a 5V supply, the input common-mode range extends to ±3.7V (relative to mid-supply), and output swings to ±3.2V into 100Ω. Proper biasing of non-inverting inputs at VCC/2 and use of AC-coupled outputs are required for rail-to-rail signal handling.
What is the thermal resistance (θJA) of LMH6628MAX in SOIC-8 package?
The LMH6628MAX in SOIC-8 (D) package has a published θJA of 145°C/W under JEDEC-standard board conditions. This value assumes a 2-layer FR-4 PCB with 1in² copper pour under the package. Adding internal ground/power planes can reduce θJA to ~95°C/W, enabling sustained 9mA/channel operation at 85°C ambient.
How does LMH6628MAX achieve low crosstalk between channels?
LMH6628MAX achieves −62dB input-referred crosstalk at 10MHz through proprietary VIP10™ bipolar process isolation and symmetrical die layout. The dual amplifiers share no active circuitry; substrate coupling is minimized via guard rings and separate collector diffusion zones. Layout best practices - such as separating input traces and avoiding shared supply routing - preserve this spec in end systems.
Is LMH6628MAX pin-compatible with CLC428?
Yes, LMH6628MAX is a drop-in replacement for CLC428 in SOIC-8 packages, sharing identical pinout, supply connections, and output drive capability. Key improvements include 300MHz vs. 220MHz bandwidth, 2nV/√Hz vs. 2.7nV/√Hz noise, and −65/−74dBc vs. −58/−65dBc distortion at 10MHz - all without requiring PCB changes or layout modifications.
LMH6628MAX 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:
- Obsolete
- 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 FAQ
1.How can I place an order for LMH6628MAX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6628MAX 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 reliable?
The price and inventory of LMH6628MAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6628MAX is usually 5 days.
3.What payment methods are accepted for LMH6628MAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6628MAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6628MAX?
LMH6628MAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6628MAX 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?
For technical support, including LMH6628MAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6628MAX requirements.
6.How does Aetrix verify that LMH6628MAX is sourced from the original manufacturer or authorized distributors?
All LMH6628MAX 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 meets industry standards.
7.What is the process for return or replacement of LMH6628MAX?
All LMH6628MAX units undergo pre-shipment inspection (PSI). If there is an issue with LMH6628MAX, 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 part is unused and in its original packaging.
Return procedure for LMH6628MAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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