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Texas Instruments LMH3401IRMSR
- Part No.:
- LMH3401IRMSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-UFQFN
- Datasheet:
-
LMH3401IRMSR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 14UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,891
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Product details
Overview
LMH3401IRMSR from Texas Instruments is a 7-GHz, ultra-wideband, fixed-gain (16 dB), fully-differential amplifier optimized for single-ended-to-differential conversion in RF/IF and high-speed data acquisition systems. It delivers –96 dBc HD2 / –102 dBc HD3 at 10 MHz, supports 5-V or 3.3-V split/single supplies, and drives GSPS ADCs with 2-VPP differential output swing into 200-Ω load.
For engineers reviewing the LMH3401IRMSR datasheet, LMH3401IRMSR pinout, LMH3401IRMSR application, or LMH3401IRMSR equivalent, key selection criteria include its 7-GHz –3-dB bandwidth, OIP3 of 45 dBm at 200 MHz, power-down feature with 10-ns enable timing, and UQFN-14 package compatibility with high-density RF layouts.
Technical Context
The LMH3401IRMSR employs a complementary BiCMOS architecture to achieve simultaneous wide bandwidth and low distortion across DC–2 GHz. Its on-chip 50-Ω input termination and matched 20-Ω output impedance simplify interface design with 50-Ω sources and ADC inputs.
It integrates a dedicated CM pin for precise output common-mode voltage control (±1.6 V range, 3.3-GHz bandwidth), enabling direct alignment with ADC reference requirements without external level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3-dB Bandwidth | 7 GHz - Enables baseband-to-RF signal conditioning up to C-band without gain peaking compensation. |
| Fixed Voltage Gain | 16 dB - Eliminates external gain-setting resistors; ensures stable, repeatable signal amplification. |
| HD2 / HD3 @ 1 GHz | –64 dBc / –72 dBc - Supports high-fidelity digitization of wideband signals in 12-bit+ ADC front-ends. |
| OIP3 @ 200 MHz | 45 dBm - Provides robust linearity for multi-tone RF applications such as broadband communications test equipment. |
| Supply Current | 55 mA @ 5 V - Delivers ultra-wideband performance at only 275 mW quiescent power. |
| Power-Down Quiescent Current | 3 mA max - Reduces system standby power while maintaining fast 10-ns wake-up for burst-mode operation. |
| Output Common-Mode Control | CM pin with 0.98–1.01 V/V gain - Allows precise, rail-to-rail-adjustable output VCM to match ADC input range. |
Pinout & Package
LMH3401IRMSR is housed in a 2.50 mm × 2.50 mm, 14-pin UQFN package with wettable flanks for automated optical inspection. Thermal resistance RθJA = 101°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | Accepts single-ended or differential input; 50-Ω matched when used with external 50-Ω resistor to ground on IN–. |
| IN– | Inverting input | Used with IN+ for differential input; grounded via 50-Ω resistor for single-ended input configuration. |
| OUT+ | Noninverting output | Delivers amplified, phase-aligned output; 20-Ω nominal impedance simplifies 50-Ω transmission line matching. |
| OUT– | Inverting output | Provides complementary output; balanced with OUT+ to <45 dBc error at 1 GHz for clean ADC sampling. |
| CM | Common-mode control input | Sets output VCM ≈ VCM; supports 3.3-GHz bandwidth for dynamic adjustment during signal acquisition. |
| PD | Power-down enable | Active-high logic: >1.2 V disables amplifier; <0.9 V enables full operation with 10-ns turn-on delay. |
| VS+, VS– | Positive/negative supply rails | Support ±1.65 V to ±2.5 V split supply or 3.3 V / 5 V single supply; PSRR >60 dB minimizes supply noise coupling. |
| GND (Pins 11, 14) | Digital reference ground | Isolated from analog signal path; serves as reference for PD pin threshold and digital control logic. |
Key Features
| Feature | Design Value |
|---|---|
| Single-ended-to-differential conversion | Optimized from DC to 2 GHz with <0.1-dB gain flatness over 700 MHz - eliminates need for baluns in IF/RF sampling paths. |
| Ultra-low harmonic distortion | –96 dBc HD2 / –102 dBc HD3 at 10 MHz - preserves signal integrity for high-resolution spectral analysis and radar pulse fidelity. |
| Integrated output impedance matching | 20-Ω differential output impedance - enables direct connection to 100-Ω differential ADC inputs without series resistors. |
| High slew rate | 18,000 V/µs - supports fast transient response for pulsed RF and time-domain applications like TDR and LIDAR. |
| Low-noise figure | 9 dB @ 200 MHz (50-Ω source) - maintains SNR in sensitive receiver front-ends before ADC quantization. |
Applications
| GSPS ADC Driver | 1-GBPS Ethernet over Microwave |
|---|---|
Use Scenario: Driving TI's ADC12J4000 4-GSPS ADC in wideband spectrum monitoring systems. IC Role / Device Role / Timing Role: Front-end differential driver providing 2-VPP, 7-GHz bandwidth signal conditioning with precise VCM alignment to ADC input range. Use Value: Enables full utilization of ADC ENOB by minimizing harmonic distortion and maintaining <45 dBc output balance at 1 GHz. |
Use Scenario: Transmit path conditioning in point-to-point microwave backhaul operating at 2.3–2.7 GHz. IC Role / Device Role / Timing Role: IF-stage amplifier converting baseband I/Q signals to differential format prior to upconversion. Use Value: Delivers 45 dBm OIP3 at 200 MHz and –55 dBc HD2 at 2 GHz - meets ETSI spectral mask requirements for adjacent channel leakage. |
| High-Speed Data Acquisition | Wideband Gain Stage |
Use Scenario: Signal conditioning in oscilloscope front-ends requiring >1-GHz analog bandwidth and low group delay variation. IC Role / Device Role / Timing Role: Fixed-gain, low-phase-error amplifier between probe interface and digitizer ASIC. Use Value: 80-ps rise/fall time and 1-ns settling to 1% ensure accurate pulse edge capture without overshoot or ringing. |
Use Scenario: Cascaded gain block in broadband test equipment signal generators (e.g., Keysight PXA). IC Role / Device Role / Timing Role: Wideband intermediate amplifier with flat frequency response and minimal group delay ripple. Use Value: 0.1-dB gain flatness over 700 MHz reduces calibration complexity and improves amplitude accuracy across multi-GHz sweeps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully-differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH5401RTAJ | 6.2-GHz bandwidth, –80 dBc HD2 at 500 MHz, 1.25 nV/√Hz input noise - lower noise but reduced bandwidth vs. LMH3401IRMSR. | Better suited for low-noise, sub-6-GHz IF amplification where OIP3 >40 dBm is sufficient. | Select LMH5401RTAJ when noise figure (<7 dB) dominates over bandwidth; avoid if >6.5-GHz signal content must be preserved. |
| LMH6554MA/NOPB | 1.6-GHz bandwidth, –79 dBc HD2 at 250 MHz, 0.9 nV/√Hz noise - narrower bandwidth, lower power (25 mA), SOIC-8 package. | Targeted at cost-sensitive, lower-frequency instrumentation where PCB space and thermal budget constrain UQFN adoption. | Choose LMH6554MA/NOPB for ≤1.5-GHz applications needing proven reliability in legacy SOIC layout; not suitable for GSPS ADC driving above 500 MHz. |
Compared with LMH5401RTAJ and LMH6554MA/NOPB, the LMH3401IRMSR uniquely balances 7-GHz bandwidth, –96 dBc HD2 at 10 MHz, and UQFN-14 footprint-making it the only option capable of driving 4-GSPS ADCs with <1% gain error across DC–2 GHz without external equalization.
Availability
LMH3401IRMSR is available at Aetrix Electronics and suitable for GSPS ADC driver, broadband communications test equipment, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMH3401IRMSR 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-speed amplifier design and RF signal chain solutions.
The LMH3401IRMSR belongs to TI's LMH ultra-wideband amplifier product line, engineered specifically for demanding single-ended-to-differential conversion in GSPS data converters and microwave infrastructure.
FAQ
What is the maximum small-signal bandwidth of the LMH3401IRMSR?
The LMH3401IRMSR achieves a 7-GHz –3-dB small-signal bandwidth at 5-V supply (VS = ±2.5 V), verified under 200-mVPP output conditions. This bandwidth remains usable up to 2 GHz with exceptional harmonic suppression, making LMH3401IRMSR ideal for C-band RF signal conditioning and ultra-fast transient response applications.
Does the LMH3401IRMSR support single-supply operation?
Yes, the LMH3401IRMSR supports both single-supply (3.3 V or 5 V) and split-supply (±1.65 V or ±2.5 V) configurations. When operated from a 5-V single supply, VS+ = 5 V and VS– = 0 V, with CM pin biasing the outputs to mid-supply (2.5 V); all AC performance specs-including 7-GHz bandwidth and –96 dBc HD2-are maintained per TI SBOS695A characterization.
How does the CM pin function in the LMH3401IRMSR?
The CM pin on the LMH3401IRMSR directly controls the output common-mode voltage (VOUT_CM ≈ VCM) with 0.98–1.01 V/V gain and 3.3-GHz small-signal bandwidth. It allows precise alignment of differential output VCM to match ADC input requirements (e.g., 0.9 V for ADS54J60), eliminating external level-shifters and reducing board area and signal path complexity in LMH3401IRMSR-based designs.
What is the power-down behavior of the LMH3401IRMSR?
The LMH3401IRMSR enters low-power mode when PD pin voltage exceeds 1.2 V (typical), reducing quiescent current to ≤3 mA. Turn-on occurs within 10 ns after PD falls below 0.9 V. During power-down, outputs enter high-impedance state-critical for time-division multiplexed signal chains. This behavior is fully characterized in LMH3401IRMSR's Electrical Characteristics tables for both 3.3-V and 5-V supplies.
Can the LMH3401IRMSR drive a 100-Ω differential load?
Yes, the LMH3401IRMSR is specified for 200-Ω differential load (100 Ω per leg), delivering 2-VPP output swing with –64 dBc HD2 at 1 GHz. Driving a 100-Ω differential load (50 Ω per leg) is feasible but reduces output swing and increases distortion; Figure 14 in SBOS695A confirms –62 dBc HD2 at 1 GHz under 100-Ω load, validating LMH3401IRMSR use in compact, high-density ADC interfaces where load impedance varies.
LMH3401IRMSR 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:
- 18000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 7 GHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 55mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3.3 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)
LMH3401IRMSR FAQ
1.How can I place an order for LMH3401IRMSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH3401IRMSR 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 LMH3401IRMSR reliable?
The price and inventory of LMH3401IRMSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH3401IRMSR is usually 5 days.
3.What payment methods are accepted for LMH3401IRMSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH3401IRMSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH3401IRMSR?
LMH3401IRMSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH3401IRMSR 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 LMH3401IRMSR?
For technical support, including LMH3401IRMSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH3401IRMSR requirements.
6.How does Aetrix verify that LMH3401IRMSR is sourced from the original manufacturer or authorized distributors?
All LMH3401IRMSR 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 LMH3401IRMSR meets industry standards.
7.What is the process for return or replacement of LMH3401IRMSR?
All LMH3401IRMSR units undergo pre-shipment inspection (PSI). If there is an issue with LMH3401IRMSR, 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 LMH3401IRMSR part is unused and in its original packaging.
Return procedure for LMH3401IRMSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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