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Texas Instruments LMH6628MA-TI
- Part No.:
- LMH6628MA-TI
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6628MA-TI.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
LMH6628MA-TI from Texas Instruments is a dual, voltage-feedback operational amplifier optimized for wideband, low-noise signal conditioning in high-fidelity analog front-ends. It delivers 300MHz unity-gain bandwidth, 2nV/√Hz input voltage noise, and −74dBc third-harmonic distortion at 10MHz, enabling precise amplification in I/Q channel pairs for communications receivers and anti-aliasing buffers for 12–16-bit ADCs.
For engineers reviewing the LMH6628MA-TI datasheet, LMH6628MA-TI pinout, LMH6628MA-TI application, or LMH6628MA-TI equivalent, key selection criteria include its matched dual-channel settling time (12ns to 0.1%), ±85mA output drive capability, and operation across ±2.5V to ±6V supplies - critical for high-speed instrumentation, RF sampling systems, and full-duplex transmission line interfaces.
Technical Context
The LMH6628MA-TI employs TI's VIP10™ complementary bipolar process to achieve simultaneous high speed and low noise. Its voltage-feedback architecture ensures unity-gain stability without external compensation, while tightly matched channels support differential gain/phase tracking below 0.1° over 20MHz.
Each amplifier features rail-to-rail output swing (±3.5V into 100Ω), low 5.5mV typical input offset voltage, and integrated ESD protection (2kV HBM). The device operates across −40°C to +85°C and maintains <0.1dB gain flatness up to 200MHz with <0.1° linear phase deviation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 300MHz - enables stable closed-loop operation at gains ≥1 with minimal phase margin degradation |
| Input Voltage Noise | 2nV/√Hz - preserves SNR in low-amplitude sensor and IF amplifier stages |
| Settling Time | 12ns to 0.1% - supports >80MSPS sampling in ADC driver applications |
| Output Current | ±85mA - drives 50Ω transmission lines or active filter loads without external buffering |
| Supply Voltage Range | ±2.5V to ±6V - compatible with both low-power portable systems and high-dynamic-range industrial rails |
| Harmonic Distortion | −74dBc (3rd, 10MHz) - minimizes intermodulation in wideband receiver chains |
| Input Offset Voltage | ±2.6mV max - ensures DC accuracy in precision integrators and active filters |
Pinout & Package
LMH6628MA-TI is housed in an 8-pin SOIC (Package Drawing D), 3.9mm × 4.9mm body, 1.75mm max height, RoHS-compliant, with standard JEDEC MS-012AA footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (A) | High-impedance node for feedback network connection; requires symmetric layout to minimize capacitive imbalance |
| 2 | Non-Inverting Input (A) | DC-biased reference point; matched to Pin 1 for common-mode rejection in differential configurations |
| 3 | Output (A) | Low-impedance source capable of ±85mA; series resistor recommended for >100pF capacitive loads |
| 4 | V− | Negative supply rail; requires local 0.1µF ceramic bypass to ground, placed within 2mm |
| 5 | V+ | Positive supply rail; independent bypassing required even when using split supplies |
| 6 | Output (B) | Electrically isolated from Output A; enables true dual-path signal processing without crosstalk (>62dB @ 10MHz) |
| 7 | Non-Inverting Input (B) | Matched to Pin 2 for I/Q channel tracking; identical bias current and offset characteristics |
| 8 | Inverting Input (B) | Independent feedback node; supports separate gain-setting resistors per channel |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel matching | Channel-to-channel crosstalk <−62dB at 10MHz ensures independent I/Q path integrity |
| Wideband stability | Unity-gain stable without external compensation - eliminates risk of oscillation in gain-of-1 buffers |
| High-output drive | ±85mA short-circuit protected output sustains 50Ω line driving without thermal derating |
| Low-distortion architecture | −74dBc 3rd-harmonic distortion at 10MHz enables clean signal reconstruction in undersampling receivers |
| Thermal performance | θJA = 145°C/W (SOIC) allows continuous operation at 85°C ambient with ≤12mA per channel |
Applications
| Communications Receiver I/Q Amplifier | High-Speed ADC Driver |
|---|---|
Use Scenario: Amplifying matched in-phase and quadrature baseband signals in zero-IF radio architectures. IC Role / Device Role / Timing Role: Dual-channel voltage amplifier providing identical gain, phase, and settling behavior across both paths to preserve image rejection. Use Value: 0.1° channel-to-channel phase mismatch at 20MHz enables >70dB image suppression without calibration. | Use Scenario: Buffering analog inputs to high-resolution SAR or pipeline ADCs operating at ≥80MSPS. IC Role / Device Role / Timing Role: Fast-settling unity-gain buffer isolating source impedance from ADC input capacitance. Use Value: 12ns to 0.1% settling ensures full-scale step accuracy before next sample clock edge. |
| Full-Duplex Coaxial Transceiver | Low-Noise Active Filter |
Use Scenario: Simultaneous transmit and receive over single coaxial cable in video surveillance or industrial control links. IC Role / Device Role / Timing Role: One channel as line driver, second as differential receiver rejecting self-interference via impedance-matched topology. Use Value: >60dB common-mode rejection at 10MHz permits concurrent 1MHz and 10MHz signal transmission/reception. | Use Scenario: Implementing 4th-order low-pass or bandpass filters in medical imaging front-ends. IC Role / Device Role / Timing Role: Dual op-amp core for cascaded biquad sections with matched component sensitivity. Use Value: 2nV/√Hz noise density maintains >90dB SNR in 10kHz-bandwidth diagnostic ultrasound filters. |
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 (1.1nV/√Hz), but higher supply current (14mA/ch) | Better suited for >200MHz IF amplification where power budget allows | Select LMH6629MA/NOPB only if 300MHz bandwidth is insufficient and thermal headroom exists |
| ADA4898-2ARMZ | Lower distortion (−90dBc HD3 @ 10MHz), wider supply range (±3V to ±12V), but slower settling (20ns) | Preferred for ultra-low-distortion audio or precision test equipment requiring DC accuracy | Choose ADA4898-2ARMZ when harmonic purity outweighs speed requirements |
Compared with LMH6628MA-TI, LMH6629MA/NOPB trades higher power for extended bandwidth and lower noise, while ADA4898-2ARMZ prioritizes distortion performance and DC precision over raw speed - making LMH6628MA-TI the optimal balance for cost-sensitive, high-speed I/Q and ADC driver designs.
Availability
LMH6628MA-TI is available at Aetrix Electronics and suitable for high-speed communications infrastructure, precision data acquisition systems, and industrial signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMH6628MA-TI 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 innovation in high-performance op amps and signal chain solutions.
The LMH6628MA-TI belongs to TI's high-speed voltage-feedback op amp product line, engineered specifically for wide dynamic range, low-noise, dual-channel applications including I/Q modulation, ADC buffering, and full-duplex transmission interfaces.
FAQ
What is the maximum capacitive load the LMH6628MA-TI can drive without instability?
The LMH6628MA-TI remains stable driving up to 100pF with proper PCB layout and local 0.1µF bypassing. For loads exceeding 100pF, a 10Ω to 22Ω series resistor at the output is recommended to isolate capacitance and maintain phase margin. This technique is validated in TI's Application Note OA-15 and confirmed in Figure 22 of the LMH6628MA-TI datasheet. Exceeding this limit risks peaking or oscillation, especially in unity-gain configurations.
Does the LMH6628MA-TI support single-supply operation?
Yes, the LMH6628MA-TI supports single-supply operation from 5V to 12V, with input common-mode range extending to V− and output swing reaching within 1.5V of each rail under load. When operated on +5V/0V, the device delivers ±3.2V output into 100Ω (per Electrical Characteristics Table). Rail-splitting networks or level-shifting circuitry may be needed for AC-coupled signals near ground potential.
How does channel matching in the LMH6628MA-TI benefit I/Q applications?
LMH6628MA-TI achieves <0.1° gain and phase mismatch between channels up to 20MHz, directly enabling >70dB image rejection in zero-IF receivers without calibration. Its matched input offset voltages (±2.6mV max), bias currents, and thermal drift ensure consistent DC operating points across both paths - critical for maintaining quadrature fidelity in LTE, WiFi, and radar front-ends where I/Q imbalance degrades EVM and ACLR.
What is the recommended power supply decoupling for the LMH6628MA-TI?
TI specifies a minimum 0.1µF ceramic capacitor placed within 2mm of each supply pin (Pins 4 and 5), connected directly to a low-inductance ground plane. For systems with noisy digital supplies, adding a 4.7µF tantalum or polymer capacitor in parallel improves low-frequency PSRR. Layout must avoid shared traces between V+ and V− bypass paths, and ground vias should be placed adjacent to each capacitor pad to minimize loop inductance - as demonstrated on the CLC730036 evaluation board.
Is the LMH6628MA-TI pin-compatible with the CLC428?
Yes, the LMH6628MA-TI is a direct drop-in replacement for the CLC428, sharing identical 8-pin SOIC (D) package, pinout, and supply voltage range (±2.5V to ±6V). It improves upon the CLC428 with 300MHz bandwidth (vs. 220MHz), lower noise (2nV/√Hz vs. 2.7nV/√Hz), and enhanced harmonic distortion performance (−74dBc HD3 vs. −65dBc). No PCB changes are required when upgrading from CLC428 to LMH6628MA-TI.
LMH6628MA-TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-TI FAQ
1.How can I place an order for LMH6628MA-TI through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6628MA-TI 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-TI reliable?
The price and inventory of LMH6628MA-TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6628MA-TI is usually 5 days.
3.What payment methods are accepted for LMH6628MA-TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6628MA-TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6628MA-TI?
LMH6628MA-TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6628MA-TI 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-TI?
For technical support, including LMH6628MA-TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6628MA-TI requirements.
6.How does Aetrix verify that LMH6628MA-TI is sourced from the original manufacturer or authorized distributors?
All LMH6628MA-TI 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-TI meets industry standards.
7.What is the process for return or replacement of LMH6628MA-TI?
All LMH6628MA-TI units undergo pre-shipment inspection (PSI). If there is an issue with LMH6628MA-TI, 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-TI part is unused and in its original packaging.
Return procedure for LMH6628MA-TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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