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Texas Instruments LMH6628MA/NOPB
- Part No.:
- LMH6628MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6628MA/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:270
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Product details
Overview
LMH6628MA/NOPB from Texas Instruments is a dual, voltage-feedback operational amplifier optimized for high-speed, low-noise signal conditioning in precision analog front-ends. It delivers 300MHz unity-gain bandwidth, 2nV/√Hz input voltage noise, and −74dBc third-harmonic distortion at 10MHz, enabling wide-dynamic-range amplification in I/Q channel pairs and anti-aliasing buffer stages for high-resolution ADCs.
For engineers reviewing the LMH6628MA/NOPB datasheet, LMH6628MA/NOPB pinout, LMH6628MA/NOPB application, or LMH6628MA/NOPB equivalent, key selection criteria include its matched dual-channel performance, ±85mA output drive capability, 12ns 0.1% settling time, and operation across ±2.5V to ±6V supplies - critical for high-fidelity instrumentation, communications receivers, and fast detector circuits.
Technical Context
The LMH6628MA/NOPB employs TI's VIP10™ complementary bipolar process to achieve simultaneous high speed and ultra-low noise. Its voltage-feedback architecture ensures unity-gain stability without external compensation while maintaining tight channel-to-channel matching in gain, phase, and distortion (<−62dB crosstalk at 10MHz).
Designed for demanding time-domain accuracy, it achieves 4ns rise/fall time and 1% overshoot on 1V steps, with closed-loop output resistance of 0.1Ω and rail-to-rail output swing (±3.5V into 100Ω) under ±5V supplies. Input common-mode range extends to ±3.7V, supporting wide-swing sensor interface topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 300MHz - enables stable gain-of-1 amplification up to VHF frequencies without peaking or instability. |
| Input Voltage Noise | 2nV/√Hz - preserves SNR in low-level signal chains such as photodiode preamps and active filters. |
| Settling Time (0.1%) | 12ns - supports accurate sampling of fast transients in ADC driver and peak detector applications. |
| Output Current | ±85mA - drives low-impedance loads (e.g., 50Ω cables, capacitive DAC buffers) without clipping. |
| Supply Range | ±2.5V to ±6V - accommodates both portable (5V single-supply derived) and industrial (±5V/±6V) systems. |
| Harmonic Distortion (HD3) | −74dBc at 10MHz - minimizes intermodulation artifacts in RF receiver I/Q paths and spectrum analyzers. |
| Channel Matching | Matched gain/phase within 0.1dB/0.1° - essential for differential line drivers and coherent beamforming circuits. |
Pinout & Package
LMH6628MA/NOPB is housed in an 8-pin SOIC (D) package with 1.27mm pitch, 3.91mm body width, and 1.75mm max height per JEDEC MS-012AA. The package supports standard reflow (MSL Level-1, 260°C peak) and features Sn lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Low-impedance buffered output capable of ±85mA drive into resistive or moderate capacitive loads. |
| 2 (−IN A) | Inverting input A | High-impedance node (200kΩ differential, 500kΩ common-mode) requiring careful layout to minimize parasitic capacitance. |
| 3 (+IN A) | Non-inverting input A | Matches −IN A in DC bias current (±0.7µA typ) and offset voltage; used for unity-gain follower or non-inverting gain configurations. |
| 4 (V−) | Negative supply rail | Connects to system ground (in single-supply) or negative rail; requires local 0.1µF bypass capacitor per TI layout guidelines. |
| 5 (+IN B) | Non-inverting input B | Electrically identical to Pin 3; enables independent configuration of second channel without cross-talk degradation. |
| 6 (−IN B) | Inverting input B | Matches Pin 2 in noise, offset, and bandwidth; supports fully differential or interleaved signal processing architectures. |
| 7 (OUT B) | Amplifier B output | Functionally identical to Pin 1; dual outputs allow matched I/Q amplification or parallel processing without gain mismatch. |
| 8 (V+) | Positive supply rail | Accepts up to +6V; must be decoupled with 0.1µF ceramic capacitor placed <2mm from pin per high-frequency layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Wideband voltage feedback topology | 300MHz GBW with unity-gain stability eliminates need for external compensation in most configurations. |
| Tightly matched dual channels | Channel-to-channel crosstalk ≤−62dB at 10MHz enables precise differential signaling without calibration overhead. |
| Low-distortion output stage | −65dBc HD2 / −74dBc HD3 at 10MHz supports clean signal reconstruction in baseband and IF stages. |
| High-output-current capability | ±85mA drive allows direct interfacing to 50Ω transmission lines, ADC inputs, and active filter networks. |
| Fast, accurate settling | 12ns to 0.1% with only 1% overshoot ensures fidelity in pulse-amplification and sample-and-hold buffer roles. |
| Robust supply flexibility | Operates from ±2.5V to ±6V (5V–12V total), supporting legacy ±5V systems and modern low-voltage embedded designs. |
Applications
| Instrumentation Amplifier Core | I/Q Channel Amplifier |
|---|---|
|
Use Scenario: Building a high-precision, low-drift instrumentation amplifier for strain gauge or thermocouple measurement. IC Role / Device Role / Timing Role: LMH6628MA/NOPB serves as matched gain-setting and output buffer stages in a 3-op-amp topology, leveraging channel matching to suppress common-mode error. Use Value: Achieves >100dB CMRR at 1kHz and sub-1µV/°C drift due to matched input offset voltage (±0.5mV max) and temperature coefficients across channels. |
Use Scenario: Amplifying in-phase (I) and quadrature (Q) signals in a software-defined radio (SDR) receiver front-end. IC Role / Device Role / Timing Role: LMH6628MA/NOPB provides simultaneous, phase-coherent amplification of I and Q baseband paths prior to ADC sampling. Use Value: Maintains <0.1° phase mismatch and <0.1dB gain mismatch across 0–50MHz, preserving EVM and constellation integrity in QAM demodulation. |
| Anti-Aliasing Buffer | High-Speed Peak Detector |
|
Use Scenario: Driving the input of a 14-bit, 100MSPS analog-to-digital converter in a digitizer or oscilloscope acquisition path. IC Role / Device Role / Timing Role: LMH6628MA/NOPB acts as a unity-gain, low-noise buffer between active RC anti-aliasing filter and ADC input. Use Value: 12ns 0.1% settling ensures full-scale transitions settle before ADC aperture window, preventing harmonic folding and SNR degradation. |
Use Scenario: Capturing transient amplitude peaks in RF power monitoring or laser pulse detection systems. IC Role / Device Role / Timing Role: LMH6628MA/NOPB implements a dual-op-amp peak detector: one channel as high-speed comparator, the other as hold amplifier. Use Value: 4ns rise time and 2nV/√Hz noise enable detection of sub-10ns pulses with <1mV amplitude resolution in noisy environments. |
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 450MHz GBW but higher 3.3nV/√Hz noise; requires ±3V min supply. | Better suited for >100MHz closed-loop gain stages where bandwidth outweighs noise sensitivity. | Select LMH6629MA/NOPB when >350MHz small-signal bandwidth is required and noise floor can be relaxed by ≥1.3nV/√Hz. |
| THS3202D | Current-feedback architecture; 600MHz bandwidth but no DC precision (±3mV VOS, 10µV/°C drift). | Optimized for fixed-gain video/RF amplification, not precision DC-coupled or low-distortion applications. | Choose THS3202D only for AC-coupled, high-gain (>10V/V), wideband video or cable driver use where DC accuracy is irrelevant. |
Compared with LMH6628MA/NOPB, LMH6629MA/NOPB trades noise performance for extra bandwidth, while THS3202D abandons DC precision entirely for raw speed - making LMH6628MA/NOPB the optimal balance of noise, distortion, settling, and DC accuracy in dual-channel wide-dynamic-range systems.
Availability
LMH6628MA/NOPB is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure, and precision test equipment requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for LMH6628MA/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 digital signal technologies, with over 90 years of innovation in high-performance analog design.
The LMH6628MA/NOPB belongs to TI's high-speed precision op amp product line, engineered specifically for wide-dynamic-range signal conditioning in communications, instrumentation, and medical imaging systems where noise, distortion, and timing accuracy are critical.
FAQ
What is the maximum operating temperature range for the LMH6628MA/NOPB?
The LMH6628MA/NOPB is specified for continuous operation from −40°C to +85°C ambient temperature, with thermal resistance θJA = 145°C/W in SOIC package. Junction temperature must remain below +150°C under all conditions; derating is required above +70°C ambient when dissipating >125mW per channel.
Does the LMH6628MA/NOPB support single-supply operation?
Yes, the LMH6628MA/NOPB operates from a single 5V to 12V supply (e.g., V+ = 5V, V− = GND). Input common-mode range extends to within 1.3V of rails, and output swings to ±3.5V into 100Ω with ±5V supplies - enabling true single-supply use in rail-to-rail signal chains when biased appropriately.
How does the LMH6628MA/NOPB compare to the CLC428 in terms of performance?
The LMH6628MA/NOPB is explicitly documented as an improved replacement for the CLC428, offering 300MHz bandwidth (vs. 200MHz), 2nV/√Hz noise (vs. 2.7nV/√Hz), −74dBc HD3 (vs. −68dBc), and tighter channel matching. It retains pin compatibility with CLC428 in SOIC-8, allowing drop-in upgrades in existing designs without layout changes.
What layout practices are recommended to maintain stability with the LMH6628MA/NOPB?
TI recommends placing 0.1µF ceramic bypass capacitors within 2mm of Pins 4 (V−) and 8 (V+), routing power traces away from sensitive inputs (Pins 2,3,5,6), and minimizing trace length to output pins. Ground plane continuity beneath the SOIC footprint and guard rings around inverting inputs reduce parasitic capacitance that causes peaking or oscillation.
Can the LMH6628MA/NOPB drive a 50Ω coaxial cable directly?
Yes - the LMH6628MA/NOPB delivers ±85mA output current and maintains 12ns 0.1% settling even into 50Ω loads. For optimal return loss and impedance matching, use a series 50Ω resistor at the output pin (not internal to device) and terminate the far end of the cable with 50Ω to ground, per TI's full-duplex transmission reference design.
LMH6628MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LMH6628MA/NOPB FAQ
1.How can I place an order for LMH6628MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6628MA/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 LMH6628MA/NOPB reliable?
The price and inventory of LMH6628MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6628MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6628MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6628MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6628MA/NOPB?
LMH6628MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6628MA/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 LMH6628MA/NOPB?
For technical support, including LMH6628MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6628MA/NOPB requirements.
6.How does Aetrix verify that LMH6628MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6628MA/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 LMH6628MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6628MA/NOPB?
All LMH6628MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6628MA/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 LMH6628MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6628MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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