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Texas Instruments LMH6628MA
- Part No.:
- LMH6628MA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6628MA.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,016
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Product details
Overview
LMH6628MA 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 −65/−74dBc harmonic distortion at 10MHz - enabling high-fidelity signal conditioning in I/Q channel amplifiers, anti-aliasing buffers for high-resolution ADCs, and fast-settling active filters.
For engineers reviewing the LMH6628MA datasheet, LMH6628MA pinout, LMH6628MA application, or LMH6628MA equivalent, key selection criteria include its ±85mA output drive capability, 12ns 0.1% settling time, dual-channel matching performance, and operation across ±2.5V to ±6V supplies - critical for precision high-speed analog front-ends.
Technical Context
The LMH6628MA implements a traditional voltage-feedback architecture with unity-gain stability and enhanced slew-rate circuitry. Its VIP10™ complementary bipolar process enables simultaneous high bandwidth (300MHz SSBW), ultra-low noise (2nV/√Hz), and low distortion (−74dBc HD3 at 10MHz) - all within matched dual channels.
Each channel supports rail-to-rail output swing up to ±3.5V into 100Ω and maintains 57–63dB CMRR/PSRR across −40°C to +85°C. The device requires minimal external components: 0.1μF bypass capacitors near supply pins and matched RF/RG resistors for optimal noise and offset performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 300MHz - enables stable closed-loop operation at gains ≥1 with full small-signal bandwidth retention. |
| Input Voltage Noise | 2nV/√Hz - sets fundamental noise floor for low-amplitude signal amplification in sensor interfaces and integrators. |
| Settling Time | 12ns to 0.1% - ensures accurate sampling of fast transients in ADC driver and peak detector applications. |
| Output Current | ±85mA - drives heavy loads including 50Ω transmission lines and active filter networks without gain compression. |
| Supply Range | ±2.5V to ±6V - supports both low-voltage portable systems and higher-dynamic-range industrial signal chains. |
| Harmonic Distortion | −65dBc (HD2), −74dBc (HD3) at 10MHz - preserves spectral purity in communication I/Q paths and RF receiver IF stages. |
| Input Offset Voltage | ±2.6mV max - limits DC error accumulation in multi-stage precision gain blocks and active filter topologies. |
Pinout & Package
LMH6628MA is housed in an 8-pin SOIC (D) package with 1.27mm pitch, 3.91mm body width, and 1.75mm max height - compatible with standard surface-mount assembly processes and IPC-7351 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node for feedback network connection; differential input resistance = 200kΩ. |
| 2 | Non-Inverting Input (Channel A) | High-impedance node for signal reference; common-mode input range extends to ±3.7V. |
| 3 | Output (Channel A) | Low-impedance source (0.1Ω closed-loop) capable of ±85mA drive into reactive or resistive loads. |
| 4 | V− Supply | Negative power rail connection; requires local 0.1μF ceramic bypass capacitor to ground. |
| 5 | V+ Supply | Positive power rail connection; same bypass requirement as V− for high-frequency PSRR integrity. |
| 6 | Inverting Input (Channel B) | Matched to Pin 1; enables tightly coupled dual-path designs such as differential line drivers/receivers. |
| 7 | Non-Inverting Input (Channel B) | Matched to Pin 2; supports independent or correlated biasing with Channel A for I/Q channel alignment. |
| 8 | Output (Channel B) | Matched to Pin 3; allows simultaneous processing of two signals with <1% gain/phase mismatch at 10MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel matching | Tight gain, phase, and distortion tracking between channels enables precise I/Q signal processing without calibration. |
| Low 2nd/3rd harmonic distortion | −65/−74dBc at 10MHz preserves signal integrity in wideband communication receivers and spectrum analyzers. |
| High output current drive | ±85mA per channel supports direct interface to 50Ω coaxial cables and active filter RC networks without buffers. |
| Fast 0.1% settling | 12ns response to 2V step ensures accurate digitization of fast pulses in time-of-flight and LIDAR front-ends. |
| Wide supply flexibility | Operates from ±2.5V to ±6V - accommodates battery-powered instrumentation and high-dynamic-range industrial systems. |
Applications
| Instrumentation Amplifier Front-End | I/Q Channel Amplifier |
|---|---|
Use Scenario: Dual-op-amp configuration forming a high-speed, low-noise instrumentation amplifier for medical ECG or industrial sensor signal extraction. IC Role / Device Role / Timing Role: LMH6628MA provides matched gain stages for differential input buffering and common-mode rejection enhancement. Use Value: 62dB typical CMRR and 2nV/√Hz noise enable sub-microvolt signal recovery in noisy environments. |
Use Scenario: Simultaneous amplification of in-phase (I) and quadrature (Q) baseband signals in software-defined radio receivers. IC Role / Device Role / Timing Role: LMH6628MA serves as dual-path, phase-matched gain block prior to IQ mixer or ADC sampling. Use Value: <1% inter-channel gain/phase mismatch at 10MHz ensures minimal image rejection degradation in complex modulation schemes. |
| ADC Anti-Aliasing Buffer | Full-Duplex Coaxial Transceiver |
Use Scenario: Driving the input of a 14-bit, 100MSPS analog-to-digital converter in radar or communications test equipment. IC Role / Device Role / Timing Role: LMH6628MA acts as a low-distortion, fast-settling buffer between anti-aliasing filter and ADC input. Use Value: 12ns 0.1% settling and −74dBc HD3 prevent harmonic folding and maintain effective number of bits (ENOB). |
Use Scenario: Bidirectional analog signal transmission over single coaxial cable in video surveillance or remote sensor links. IC Role / Device Role / Timing Role: LMH6628MA implements driver/receiver pair in differential topology for simultaneous transmit and receive. Use Value: >60dB channel-to-channel crosstalk suppression at 10MHz enables clean separation of forward and reverse signals. |
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 | Higher GBW (450MHz), lower noise (1.4nV/√Hz), but narrower supply range (±3V to ±5.5V) and no SOIC packaging. | Better suited for >200MHz closed-loop gain stages where layout allows QFN thermal management. | Select LMH6629MA only when bandwidth/noise requirements exceed LMH6628MA and SOIC footprint is not mandatory. |
| OPA2691U | Lower distortion (−82dBc HD3), wider supply (±2.5V to ±6.5V), but higher input noise (3.3nV/√Hz) and slower settling (15ns). | Preferred for ultra-low-distortion video line drivers where noise floor is secondary to harmonic suppression. | Choose OPA2691U when HD3 < −80dBc is required and 15ns settling meets system timing budgets. |
Compared with LMH6628MA, LMH6629MA trades SOIC compatibility and supply flexibility for higher speed and lower noise, while OPA2691U prioritizes distortion performance over settling speed and noise - making LMH6628MA the balanced choice for general-purpose high-speed dual-channel signal conditioning where board space and thermal constraints favor SOIC.
Availability
LMH6628MA is available at Aetrix Electronics and suitable for high-speed data acquisition, broadband communications infrastructure, and precision test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMH6628MA 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 innovation in high-performance op amps and signal chain solutions.
The LMH6628MA belongs to TI's high-speed voltage-feedback op amp product line, engineered specifically for wide dynamic range, low-noise, dual-channel applications in communications, instrumentation, and high-fidelity signal processing.
FAQ
What is the maximum operating temperature range for the LMH6628MA?
The LMH6628MA is rated for continuous operation from −40°C to +85°C ambient temperature. Its thermal resistance (θJA = 145°C/W) and junction temperature limit (+150°C) allow reliable performance under typical PCB layouts with standard SOIC copper pour. Derating is required above 70°C ambient if total power dissipation exceeds 150mW per channel.
Does the LMH6628MA support single-supply operation?
Yes, the LMH6628MA supports single-supply operation from 5V to 12V, with input common-mode range extending to within 1.3V of the negative rail and output swing to within 1.5V of either rail under load. For true rail-to-rail input/output, external level-shifting or biasing is required - the device itself is not rail-to-rail.
What evaluation board is recommended for the LMH6628MA?
The CLC730036 evaluation board is officially supported for the LMH6628MA. It features SOIC socketing, configurable gain networks, SMA connectors for high-frequency I/O, and optimized layout for low-noise, high-speed measurement - enabling rapid validation of settling time, distortion, and frequency response per the datasheet.
How does the LMH6628MA handle capacitive loads?
The LMH6628MA can drive up to 100pF directly without instability, but larger capacitive loads require isolation via a series output resistor (e.g., 10–50Ω). Figure 22 in the datasheet shows recommended RS values versus CL; adding this resistor restores phase margin and prevents peaking or oscillation while preserving bandwidth within design limits.
Is the LMH6628MA RoHS compliant and lead-free?
Yes, the LMH6628MA/NOPB.A variant is RoHS compliant and features 100% matte tin (Sn) lead finish. It carries JEDEC MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for reflow up to 260°C peak - fully compatible with standard lead-free assembly processes.
LMH6628MA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LMH6628MA FAQ
1.How can I place an order for LMH6628MA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6628MA 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 reliable?
The price and inventory of LMH6628MA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6628MA is usually 5 days.
3.What payment methods are accepted for LMH6628MA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6628MA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6628MA?
LMH6628MA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6628MA 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?
For technical support, including LMH6628MA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6628MA requirements.
6.How does Aetrix verify that LMH6628MA is sourced from the original manufacturer or authorized distributors?
All LMH6628MA 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 meets industry standards.
7.What is the process for return or replacement of LMH6628MA?
All LMH6628MA units undergo pre-shipment inspection (PSI). If there is an issue with LMH6628MA, 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 part is unused and in its original packaging.
Return procedure for LMH6628MA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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