My Inquiry
My Account
Texas Instruments LMH5401IRMST
- Part No.:
- LMH5401IRMST
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-UFQFN
- Datasheet:
-
LMH5401IRMST.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 14UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,279
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMH5401IRMST 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), and 1.25 nV/√Hz input voltage noise. It drives GSPS ADCs in high-speed data acquisition systems with precise common-mode control via the CM pin.
For engineers reviewing the LMH5401IRMST datasheet, LMH5401IRMST pinout, LMH5401IRMST application, or LMH5401IRMST equivalent, this page provides verified specifications, UQFN-14 package details, distortion vs. frequency behavior, and validated alternatives for RF/IF gain block, ADC driver, and balun-replacement use cases.
Technical Context
The LMH5401IRMST employs a complementary BiCMOS architecture enabling DC–2 GHz usable bandwidth in both single-ended-to-differential (SE-DE) and differential-to-differential (DE-DE) modes. Its internal feedback network supports fixed-gain configurations (e.g., 4 V/V = 12 dB) without external resistors when using FB+ and FB– pins.
It integrates a dedicated CM input pin to align output common-mode voltage with ADC requirements, supports ±2.5 V or 3.3 V split supplies, and features logic-controlled power-down (PD pin) reducing quiescent current to ≤6 mA. Output impedance is tightly controlled at 16–24 Ω (differential, DC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 GHz - enables stable 12 dB gain up to ~6 GHz small-signal bandwidth |
| Slew Rate | 17,500 V/µs - supports clean 2 VPP large-signal step response with 80 ps rise time |
| HD2 @ 100 MHz | –104 dBc (1 VPP) - ensures minimal even-order distortion in baseband/IF sampling |
| Input Voltage Noise | 1.25 nV/√Hz - preserves SNR when driving high-resolution ADCs like ADC12J4000 |
| Supply Current | 55 mA (active), ≤6 mA (power-down) - balances performance and power in portable test equipment |
| Common-Mode Control | CM pin accepts 1.35–1.55 V (3.3 V supply) or 1.4–2.0 V (5 V supply) - directly sets VOCM within ADC input range |
| Output Impedance | 16–24 Ω differential - matches standard 200 Ω ADC termination without series resistors |
Pinout & Package
LMH5401IRMST is housed in a 2.50 mm × 2.50 mm, 14-pin UQFN (Ultra-Thin Quad Flat No-lead) package with wettable flanks, optimized for RF layout and thermal dissipation (RθJA = 101 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential input pair | Accepts single-ended (via IN+) or differential input; VICL/VICH limits define safe common-mode range |
| OUT+, OUT– | Differential output pair | Delivers 5.8 VPP swing (5 V supply) into 200 Ω load; 47 dBc balance error at 1 GHz ensures ADC sampling fidelity |
| FB+, FB– | Feedback node connections | Enable closed-loop gain configuration; internal resistors set G = 12 dB unless externally modified |
| CM | Common-mode reference input | Directly programs output VOCM; 0.98–1.01 V/V gain ensures accurate tracking of ADC reference |
| PD | Power-down enable (active-high) | Logic ≥1.2 V disables amplifier; turnoff/on delay ≤10 ns supports burst-mode operation |
| VS+, VS–, GND | Supply and ground terminals | Support 3.15–5.25 V total supply; dual-supply operation required for full dynamic range |
Key Features
| Feature | Design Value |
|---|---|
| DC–2 GHz usable bandwidth | Enables direct IF sampling at L-band without image-reject filtering |
| SE-DE conversion without balun | Eliminates discrete transformer, saving board area and insertion loss in compact RF front ends |
| Low IMD3 at 1 GHz (–60 dBc) | Maintains SFDR > 70 dBFS in wideband receivers with two-tone 200 MHz spacing |
| Power-down mode (≤6 mA) | Reduces system-level power by >90% during idle cycles in battery-powered instrumentation |
| UQFN-14 thermal performance | RθJB = 61 °C/W enables sustained 275 mW operation on 2-layer PCBs without heatsink |
Applications
| RF Signal Chain Driver | GSPS ADC Interface |
|---|---|
Use Scenario: Driving differential inputs of ADC12J4000 in microwave backhaul receiver. IC Role / Device Role / Timing Role: SE-DE gain block with precise VOCM alignment to ADC's 0.95 V common-mode requirement. Use Value: Replaces discrete balun + op-amp stage, improving amplitude/phase matching and reducing group delay variation <10 ps across 1 GHz. |
Use Scenario: Conditioning IF signal from mixer to 4 GSPS ADC in spectrum analyzer. IC Role / Device Role / Timing Role: High-linearity buffer with 800 MHz 0.1-dB flatness supporting ENOB > 9.5 bits. Use Value: HD2/HD3 < –75 dBc at 500 MHz preserves SFDR while enabling single-chip digitization of 200 MHz instantaneous bandwidth. |
| SAW Filter Buffer | Level Shifter for Mixed-Supply Systems |
Use Scenario: Amplifying output of 214 MHz SAW filter before ADC in LTE femtocell baseband. IC Role / Device Role / Timing Role: Low-noise gain block compensating SAW insertion loss while maintaining OIP3 > 35 dBm. Use Value: 1.25 nV/√Hz input noise + –95 dBc IMD2 at 200 MHz prevents degradation of adjacent-channel rejection ratio. |
Use Scenario: Interfacing 1.8 V FPGA DAC output to 3.3 V ADC input in software-defined radio. IC Role / Device Role / Timing Role: Single-ended input, differential output level translator with rail-to-rail VOCM control. Use Value: CM pin accepts 1.5 V reference to shift output common-mode from 0.9 V to 1.65 V, eliminating level-shifting resistors. |
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 - requires external common-mode feedback | Better suited for cost-sensitive, lower-frequency (<500 MHz) ADC drivers where VOCM flexibility is not required | Select THS4561IRGET only if bandwidth demand ≤3 GHz and system-level common-mode control is already implemented externally |
| LMH5400IRMST | Same UQFN-14 package and pinout; lacks power-down (PD) pin and has reduced HD3 performance (–52 dBc @1 GHz vs –58 dBc) | Targeted at always-on, space-constrained applications where power gating is unnecessary | LMH5400IRMST is a drop-in replacement *only* for non-power-cycled designs; LMH5401IRMST adds critical PD functionality and 6 dB HD3 improvement |
Compared with THS4561IRGET, LMH5401IRMST delivers 2.5× higher bandwidth and 0.85× lower input noise for wideband IF sampling; versus LMH5400IRMST, it adds power-down capability and improves third-harmonic suppression by 6 dB - critical for multi-carrier LTE and 5G NR signal generation.
Availability
LMH5401IRMST is available at Aetrix Electronics and suitable for GSPS ADC drivers, RF/IF gain blocks, and balun-replacement applications requiring stable component supply, consistent parametric performance across temperature, and long-term industrial lifecycle support.
Supply support for LMH5401IRMST 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 decades of expertise in RF and high-speed amplifier design.
The LMH5401IRMST belongs to TI's high-frequency fully differential amplifier product line, engineered specifically for DC-coupled, wideband signal conditioning in test & measurement, broadband communications, and high-speed data acquisition systems.
FAQ
What is the maximum small-signal bandwidth of LMH5401IRMST at G = 12 dB?
The LMH5401IRMST achieves 6.2 GHz small-signal (–3 dB) bandwidth at G = 12 dB with 5 V supply, as specified in the Electrical Characteristics table under SSBW. This bandwidth remains usable up to 2 GHz with <0.1 dB gain flatness, making it suitable for L-band and S-band RF applications where amplitude consistency is critical.
Does LMH5401IRMST support single-supply operation?
No, LMH5401IRMST requires dual-supply operation (e.g., ±2.5 V or ±1.65 V) to achieve its full dynamic range and specified distortion performance. The datasheet specifies recommended operating conditions only for split supplies, and the input common-mode voltage range (VICL/VICH) is defined relative to VS– and VS+, confirming dual-rail dependency.
How does the CM pin function in LMH5401IRMST?
The CM pin on LMH5401IRMST is a high-impedance input that directly programs the output common-mode voltage (VOCM) with 0.98–1.01 V/V gain. When driven with a stable reference (e.g., 0.95 V), it forces VOCM to match ADC input requirements without feedback resistors - enabling seamless interface to devices like ADC12J4000 without external level-shifting circuitry.
What is the power-down current consumption of LMH5401IRMST?
With PD pin held ≥1.2 V, LMH5401IRMST draws ≤6 mA quiescent current across temperature (–40°C to +85°C), reducing total power from 275 mW to <30 mW. Turnoff and turnon delays are both ≤10 ns, allowing rapid cycling in time-interleaved or burst-mode systems without compromising settling accuracy.
Can LMH5401IRMST drive a 50 Ω differential load?
LMH5401IRMST is characterized for 200 Ω differential loads (RO = 40 Ω per side), and its 16–24 Ω output impedance is mismatched to 50 Ω. Driving 50 Ω directly causes gain error and degraded distortion; TI recommends using 200 Ω termination or adding series resistors (e.g., 30 Ω each) to match 50 Ω while preserving stability and linearity per Application Report SBAA309.
LMH5401IRMST 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:
- 6.2 GHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 55mA
- Current - Output / Channel:
- -
- 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)
LMH5401IRMST FAQ
1.How can I place an order for LMH5401IRMST through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH5401IRMST 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 LMH5401IRMST reliable?
The price and inventory of LMH5401IRMST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH5401IRMST is usually 5 days.
3.What payment methods are accepted for LMH5401IRMST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH5401IRMST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH5401IRMST?
LMH5401IRMST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH5401IRMST 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 LMH5401IRMST?
For technical support, including LMH5401IRMST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH5401IRMST requirements.
6.How does Aetrix verify that LMH5401IRMST is sourced from the original manufacturer or authorized distributors?
All LMH5401IRMST 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 LMH5401IRMST meets industry standards.
7.What is the process for return or replacement of LMH5401IRMST?
All LMH5401IRMST units undergo pre-shipment inspection (PSI). If there is an issue with LMH5401IRMST, 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 LMH5401IRMST part is unused and in its original packaging.
Return procedure for LMH5401IRMST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMH5401IRMST Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
