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Texas Instruments LMH5401IRMSR
- Part No.:
- LMH5401IRMSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-UFQFN
- Datasheet:
-
LMH5401IRMSR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 14UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,207
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Product details
Overview
LMH5401IRMSR from Texas Instruments is an 8-GHz fully differential amplifier optimized for SE-DE and DE-DE signal chains, delivering 17,500 V/µs slew rate, –104 dBc HD2 at 100 MHz (1 VPP, 200 Ω), 1.25 nV/√Hz input voltage noise, and 55 mA quiescent current. It drives GSPS ADCs in high-speed data acquisition systems with DC-coupled operation and precise common-mode control.
For engineers reviewing the LMH5401IRMSR datasheet, LMH5401IRMSR pinout, LMH5401IRMSR application, or LMH5401IRMSR equivalent, this page delivers verified specifications, UQFN-14 package mapping, SE-DE/DE-DE distortion performance across 100 MHz–1 GHz, power-down timing (10 ns turnon/turnoff), and real-world ADC driver use cases including RF sampling and SAW filter buffering.
Technical Context
The LMH5401IRMSR employs a complementary BiCMOS architecture to achieve 8-GHz gain bandwidth product and 4.8-GHz large-signal –3-dB bandwidth at 2 VPP output swing. Its dual feedback paths (FB+ and FB–) support both single-ended and differential inputs while maintaining >47 dB output balance error up to 1 GHz.
It integrates a dedicated CM pin for precise output common-mode alignment with ADC requirements, supports ±2.5 V or ±1.65 V split supplies, and features a logic-controlled power-down mode reducing quiescent current to 1–3 mA. The amplifier operates DC-coupled with VICL/VICH input range spanning (VS–)+0.41 V to (VS+)–1.41 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 GHz - Enables stable 12 dB (4×) gain up to ~2 GHz with minimal phase margin degradation |
| Slew Rate | 17,500 V/µs - Supports clean 2-V step transitions with 80 ps rise/fall time (10%–90%) |
| HD2 @ 100 MHz | –104 dBc (1 VPP, 200 Ω, DE-DE) - Ensures <0.0006% second-harmonic contribution in IF sampling |
| Input Voltage Noise | 1.25 nV/√Hz - Minimizes added noise floor when driving 12-bit+ GSPS ADCs |
| Power Consumption | 55 mA @ 5 V - Delivers 275 mW total power for ultra-wideband performance without forced cooling |
| Output Swing | 5.8 VPP differential - Drives 200-Ω ADC inputs to full-scale with headroom for transient margins |
| Power-Down Current | 1–3 mA - Reduces system standby power by >94% while retaining fast 10 ns wake-up latency |
Pinout & Package
LMH5401IRMSR is housed in a 2.50 mm × 2.50 mm UQFN-14 package with wettable flanks and thermal pad (exposed die attach). Pin 1 is marked by top-side dot; pins are numbered counterclockwise starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Positive input | Differential or single-ended signal entry point; accepts DC-coupled inputs within (VS–)+0.41 V to (VS+)–1.41 V |
| IN– | Negative input | Complementary input for differential drive; enables balanced noise rejection and CMRR >72 dB |
| OUT+ | Positive output | Drives ADC's positive input; maintains 16–24 Ω differential output impedance for matched termination |
| OUT– | Negative output | Drives ADC's negative input; achieves 47 dB balance error at 1 GHz for clean differential signaling |
| FB+ | Positive feedback | Connects external resistor to set gain in non-inverting configuration; must be DC-coupled |
| FB– | Negative feedback | Connects external resistor to set gain in inverting configuration; enables SE-DE conversion without balun |
| CM | Common-mode reference | Aligns output VOCM to ADC's required input common-mode voltage; supports 1.2 GHz small-signal bandwidth |
| PD | Power-down control | Logic-high (>1.2 V) disables amplifier; draws ≤6 mA in shutdown; 10 ns turnon/turnoff latency |
| VS+, VS– | Supply rails | Support ±1.65 V to ±2.5 V split supplies or 3.3 V/5 V single supply; PSRR >–80 dB on both rails |
| GND | Ground | Pins 11 & 14 serve as power-down ground return; require low-inductance connection to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| SE-DE conversion without balun | Enables direct single-ended source interfacing to differential ADCs across DC–2 GHz, eliminating 2+ passive components and layout area |
| DC-coupled operation | Supports baseband signal conditioning with no AC coupling capacitors; preserves phase integrity for time-domain applications |
| Adjustable output common-mode | CM pin allows VOCM tuning from (VS–)+1.4 V to (VS+)–1.4 V, matching diverse ADC input requirements without level-shifting circuitry |
| Ultra-low distortion at 1 GHz | HD2 = –56 dBc and HD3 = –58 dBc (2 VPP, 200 Ω) enable >70 dB SFDR in 1-GHz IF sampling channels |
| Fast power-down recovery | 10 ns turnon delay ensures seamless switching between active and low-power states in burst-mode receivers |
Applications
| RF Sampling ADC Driver | SAW Filter Buffer |
|---|---|
|
Use Scenario: Driving ADC12J4000 in 3.2-GSPS wideband receiver front-end with 1.2-GHz IF input. IC Role / Device Role / Timing Role: Fully differential amplifier performing SE-DE conversion and gain setting (G = 12 dB) while preserving SNR and SFDR. Use Value: Achieves –104 dBc HD2 at 100 MHz and 4.8-GHz large-signal bandwidth, enabling >72 dB ENOB at Nyquist. |
Use Scenario: Buffering output of 214-MHz SAW bandpass filter before digitization in spectrum analyzer. IC Role / Device Role / Timing Role: High-linearity gain block compensating SAW insertion loss while rejecting common-mode noise. Use Value: 1.25 nV/√Hz input noise and –95 dBc IMD3 at 200 MHz maintain filter-defined selectivity and dynamic range. |
| Balun Replacement | High-Speed DAC Output Buffer |
|
Use Scenario: Replacing discrete transformer-based balun in 500-MHz LTE digital predistortion feedback path. IC Role / Device Role / Timing Role: Active balun providing amplitude/phase-matched differential outputs with DC coupling. Use Value: 47 dB output balance error at 1 GHz and <1 dB gain flatness over 800 MHz eliminates balun size, cost, and frequency limitations. |
Use Scenario: Buffering AD9164 DAC output in 12-GSPS arbitrary waveform generator with 2.4-GHz analog bandwidth. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer isolating DAC core from reactive load while maintaining settling fidelity. Use Value: 17,500 V/µs slew rate and 1 ns 0.1% settling time preserve 12-bit DAC accuracy at multi-GHz update rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4561IRGET | Lower GBP (3.2 GHz), higher input noise (2.3 nV/√Hz), no CM pin, 12-bit ENOB limit at 500 MHz | Best suited for cost-sensitive 12-bit, <500-MHz ADC drivers where balun replacement is not required | Select THS4561IRGET only if bandwidth demand ≤3 GHz and common-mode control is handled externally |
| LMH5400IRKSR | Same UQFN-14 package and pinout, but fixed-gain (12 dB) with no external feedback resistors; lacks PD pin | Ideal for space-constrained, fixed-gain SE-DE interfaces where power-down and gain flexibility are unnecessary | Choose LMH5400IRKSR when design requires identical performance envelope without programmable gain or shutdown control |
Compared with THS4561IRGET and LMH5400IRKSR, LMH5401IRMSR uniquely combines 8-GHz GBP, user-configurable gain via FB+/FB–, active CM control, and logic-enabled power-down-making it the only option for scalable, DC-coupled, high-SFDR ADC driver designs demanding >1-GHz usable bandwidth.
Availability
LMH5401IRMSR is available at Aetrix Electronics and suitable for GSPS ADC driver, RF sampling front-end, and high-speed DAC buffer applications requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing.
Supply support for LMH5401IRMSR 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 high-performance signal chain solutions, with over 50 years of innovation in precision amplifiers and data converters.
The LMH5401IRMSR belongs to TI's high-speed differential amplifier product line, designed specifically for DC-coupled, wideband SE-DE and DE-DE signal conditioning in test equipment, broadband communications, and high-speed data acquisition systems.
FAQ
What is the maximum small-signal bandwidth of LMH5401IRMSR at 5 V supply?
The LMH5401IRMSR achieves a small-signal –3-dB bandwidth of 6.2 GHz at 5 V supply (±2.5 V), measured with 200-mVPP output into 200-Ω differential load. This bandwidth supports stable operation up to 2 GHz with 12 dB gain while maintaining >0.1-dB flatness over 800 MHz, making it suitable for wideband IF and RF sampling applications where phase linearity is critical.
Does LMH5401IRMSR support single-supply operation?
Yes, LMH5401IRMSR supports single-supply operation from 3.3 V to 5.25 V. When using 3.3 V (1.65 V/–1.65 V split), it delivers 6 GHz small-signal bandwidth and 4.4 GHz large-signal bandwidth. Input common-mode range remains functional from (VS–)+0.41 V to (VS+)–1.41 V, and the CM pin allows VOCM adjustment to match single-supply ADC requirements without external level shifters.
How does the CM pin function in LMH5401IRMSR?
The CM pin on LMH5401IRMSR sets the output common-mode voltage (VOCM) with 0.98–1.01 V/V gain and ±27 mV offset. It accepts DC or low-frequency control voltages from (VS–)+1.4 V to (VS+)–1.4 V, enabling precise alignment with ADC input common-mode requirements. Its 1.2 GHz small-signal bandwidth ensures fast VOCM settling during dynamic gain or frequency changes in the signal chain.
What is the power-down behavior of LMH5401IRMSR?
Applying >1.2 V to the PD pin places LMH5401IRMSR into power-down mode, reducing quiescent current to 1–3 mA. Turnoff and turnon delays are both 10 ns, allowing rapid state transitions in burst-mode systems. During shutdown, outputs enter high-impedance state, and internal biasing is disabled-ensuring no signal leakage or loading on downstream ADC inputs.
Can LMH5401IRMSR drive 50-Ω differential loads directly?
No, LMH5401IRMSR is specified for 200-Ω differential loads (100 Ω per side) and exhibits 16–24 Ω differential output impedance. Driving 50-Ω loads directly causes mismatch, gain error, and degraded distortion. For 50-Ω systems, use external series resistors (e.g., 50 Ω per output) or a matching network to maintain specified HD2/HD3 performance and 0.1-dB flatness up to 800 MHz.
LMH5401IRMSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 17500V/µs
- Gain Bandwidth Product:
- 8 GHz
- -3db Bandwidth:
- 1.2 GHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 55mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 3.15 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-UQFN (2.5x2.5)
LMH5401IRMSR FAQ
1.How can I place an order for LMH5401IRMSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH5401IRMSR 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 LMH5401IRMSR reliable?
The price and inventory of LMH5401IRMSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH5401IRMSR is usually 5 days.
3.What payment methods are accepted for LMH5401IRMSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH5401IRMSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH5401IRMSR?
LMH5401IRMSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH5401IRMSR 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 LMH5401IRMSR?
For technical support, including LMH5401IRMSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH5401IRMSR requirements.
6.How does Aetrix verify that LMH5401IRMSR is sourced from the original manufacturer or authorized distributors?
All LMH5401IRMSR 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 LMH5401IRMSR meets industry standards.
7.What is the process for return or replacement of LMH5401IRMSR?
All LMH5401IRMSR units undergo pre-shipment inspection (PSI). If there is an issue with LMH5401IRMSR, 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 LMH5401IRMSR part is unused and in its original packaging.
Return procedure for LMH5401IRMSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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