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Texas Instruments LMH6554LEE/NOPB
- Part No.:
- LMH6554LEE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-UFQFN
- Datasheet:
-
LMH6554LEE/NOPB.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 14UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
LMH6554LEE/NOPB from Texas Instruments is a 2.8-GHz ultra-linear fully differential amplifier (FDA) designed as a high-fidelity ADC driver for 8- to 16-bit data acquisition systems. It delivers 1.8-GHz large-signal bandwidth at 2 VPP, −96 dBc HD2/−97 dBc HD3 at 75 MHz, 0.9 nV/√Hz input voltage noise, and operates from ±2.5-V or single 5-V supplies in a 2.5 mm × 2.5 mm UQFN-14 package.
For engineers reviewing the LMH6554LEE/NOPB datasheet, LMH6554LEE/NOPB pinout, LMH6554LEE/NOPB application, or LMH6554LEE/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed differential driving use cases (e.g., single-ended-to-differential conversion for 16-bit ADCs), and real-world alternative part comparisons - all grounded in TI's production-grade SNOSB30Q datasheet (Rev. March 2026).
Technical Context
The LMH6554LEE/NOPB employs a proprietary differential current-mode input stage enabling gain-bandwidth independence: small-signal bandwidth remains 2.8 GHz at unity gain and sustains 1.6 GHz at AV = 4 without sacrificing flatness or distortion. Its integrated output common-mode control circuit sets VOCM independently of input common mode via the VCM pin (1 V/V gain, ±1.25 V range) and forces balanced ±OUT outputs even with single-ended input drive.
This FDA uses internal compensation optimized for RF = 200 Ω, supports enable/disable via VEN (2.5 V threshold, 15 ns switching), and achieves 16-bit linearity up to 75 MHz driving 2 VPP into 200 Ω loads. Thermal resistance is 60 °C/W (RθJA), and ESD ratings are ±2000 V HBM per ANSI/ESDA/JEDEC JS-001.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 2.8 GHz at AV = 1 - enables wideband signal conditioning before high-speed ADC sampling. |
| Large-Signal Bandwidth | 1.8 GHz at 2 VPP - supports full-scale analog input to 16-bit converters without slew-induced distortion. |
| OIP3 | 46.5 dBm at 150 MHz - ensures robust RF/IF gain block performance in multi-tone environments. |
| Harmonic Distortion | −96 dBc HD2 / −97 dBc HD3 at 75 MHz - meets dynamic range requirements for precision digitization. |
| Input Noise Density | 0.9 nV/√Hz - preserves SNR in low-amplitude, wideband sensor or IF chain amplification. |
| Supply Current | 52 mA typical at ±2.5 V - balances high-speed performance with manageable power in dense PCB layouts. |
| Enable Threshold | 2.5 V on VEN (±0.3 V tolerance) - allows direct interfacing with standard 3.3-V/5-V logic for power gating. |
Pinout & Package
LMH6554LEE/NOPB is housed in a 14-pin UQFN package (2.50 mm × 2.50 mm, 0.5-mm pitch) with wettable flanks and exposed thermal pad. Pin 1 is marked by top-side dot; pins 11 and 14 are no-connect (NC) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply (pins 1, 10) | Dual connection for low-impedance +2.5 V (split) or +5 V (single-supply) routing; decoupling required near both pins. |
| V− | Negative supply (pins 3, 8) | Dual connection for −2.5 V (split) or GND (single-supply); shared return path must minimize ground bounce. |
| +IN / −IN | Differential input (pins 6, 5) | Current-mode inputs with 19 Ω differential resistance; require matched external termination (e.g., 50 Ω) for optimal CMRR. |
| +FB / −FB | Feedback nodes (pins 4, 7) | Direct connection points for external RF resistors; mismatch >0.1% degrades balance error and DC offset. |
| +OUT / −OUT | Differential output (pins 13, 12) | Low-impedance outputs capable of ±1.42 V swing into 200 Ω; require series isolation resistors when driving capacitive ADC inputs. |
| VCM | Output common-mode setpoint (pin 2) | High-impedance input referenced to mid-supply; must be bypassed with 0.1 µF ceramic capacitor to suppress noise coupling. |
| VEN | Enable control (pin 9) | Active-high logic input; pulls to ~2.5 V internally when floating; drives output stage into high-Z state when low. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Decouples gain setting from bandwidth trade-offs - maintains 2.8 GHz SSBW across AV = 1 to 8 with fixed RF = 200 Ω. |
| Integrated VCM control | 1 V/V buffered VCM pin enables precise output common-mode alignment to ADC reference (e.g., 1.2 V), critical for DC-coupled systems. |
| Ultra-low distortion | −96 dBc HD2/−97 dBc HD3 at 75 MHz ensures <0.001% THD+N for baseband and IF signals in medical imaging or spectrum analyzers. |
| Single-ended-to-differential conversion | Validated operation with one input driven - eliminates need for baluns in DC-coupled applications like oscilloscope front-ends. |
| Thermal performance | 60 °C/W RθJA with exposed pad allows sustained 260 mW dissipation in compact layouts without forced air cooling. |
Applications
| Differential ADC Driver | Single-Ended to Differential Converter |
|---|---|
|
Use Scenario: Driving 16-bit, 100-MSPS ADC inputs in test equipment with 2 VPP full-scale range and DC coupling requirement. IC Role / Device Role / Timing Role: Fully differential amplifier providing matched gain, phase, and common-mode control to maximize ENOB and SFDR. Use Value: Delivers 16-bit linearity up to 75 MHz into 200 Ω loads while maintaining −96 dBc HD2 - directly enabling high-resolution time-domain capture. |
Use Scenario: Replacing RF transformers in ultrasound beamformer receive chains where DC response and size constraints prohibit magnetic components. IC Role / Device Role / Timing Role: Single-ended input amplifier generating balanced differential outputs with <−64 dB balance error up to 100 MHz. Use Value: Eliminates transformer insertion loss and frequency roll-off, preserving SNR across 0.1–20 MHz bandwidth with no DC blocking caps. |
| IF/RF Gain Block | SAW Filter Buffer/Driver |
|
Use Scenario: Amplifying 150-MHz IF signals in cellular base station receivers prior to downconversion, requiring high OIP3 and low noise figure. IC Role / Device Role / Timing Role: High-linearity gain stage with 46.5 dBm OIP3 and 7.7 dB NF at 100 MHz to maintain adjacent-channel rejection. Use Value: Enables >100 dB spurious-free dynamic range in multi-carrier LTE systems without cascaded gain stages. |
Use Scenario: Isolating and driving 200-MHz SAW filters in GPS/GNSS front-ends where impedance matching and group delay flatness are critical. IC Role / Device Role / Timing Role: Low-output-impedance buffer minimizing filter loading effects and preserving passband shape. Use Value: Maintains <0.1 dB gain flatness to 830 MHz - ensuring consistent time-of-arrival measurement accuracy across satellite bands. |
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 bandwidth (1.8 GHz SSBW), higher input noise (1.1 nV/√Hz), same 14-pin UQFN package. | Better DC precision (0.1 mV VOS) but reduced RF/IF linearity (OIP3 = 42 dBm @ 150 MHz). | Choose THS4561IRGET when DC accuracy and lower quiescent current (28 mA) outweigh wideband distortion requirements. |
| ADA4940-1ACPZ-R7 | Lower bandwidth (1.1 GHz SSBW), lower power (12.5 mA), SOIC-8 package (no thermal pad). | Optimized for precision instrumentation (−110 dBc HD2 @ 10 MHz) rather than RF/ADC driving. | Choose ADA4940-1ACPZ-R7 for battery-powered portable instruments needing rail-to-rail output swing and low THD at sub-50 MHz. |
Compared with THS4561IRGET and ADA4940-1ACPZ-R7, LMH6554LEE/NOPB uniquely combines 2.8-GHz bandwidth, −96 dBc HD2 at 75 MHz, and integrated VCM control - making it the only option qualified for 16-bit, >100-MSPS ADC driving with DC-coupled single-ended sources.
Availability
LMH6554LEE/NOPB is available at Aetrix Electronics and suitable for high-speed data acquisition, RF receiver front-ends, and precision test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMH6554LEE/NOPB 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 delivering analog and embedded processing solutions, with over 50 years of innovation in high-performance signal chain products.
The LMH6554LEE/NOPB belongs to TI's high-speed fully differential amplifier product line, engineered specifically for ultra-wideband, low-distortion signal conditioning in ADC driver, RF/IF gain block, and high-fidelity instrumentation applications.
FAQ
What is the maximum operating junction temperature for LMH6554LEE/NOPB?
The absolute maximum operating junction temperature for LMH6554LEE/NOPB is 150°C, as specified in Section 5.1 of the TI SNOSB30Q datasheet. Derating is required above +125°C ambient; thermal design must ensure RθJA = 60°C/W and proper PCB copper pour under the exposed pad to maintain reliability in continuous 260-mW operation.
Can LMH6554LEE/NOPB operate from a single 5-V supply?
Yes, LMH6554LEE/NOPB supports single 5-V operation with V+ = 5 V and V− = GND. However, input common-mode range is limited (±1.25 V), so AC coupling is typically required for single-ended inputs. For DC-coupled operation or lowest distortion, split ±2.5-V supplies are recommended per Section 6.3 of the datasheet.
What is the function of the VCM pin on LMH6554LEE/NOPB?
The VCM pin on LMH6554LEE/NOPB sets the output common-mode voltage with 1 V/V gain and ±1.25 V range. It must be driven by a low-impedance reference (e.g., ADC VREF) and bypassed to ground with a 0.1-µF ceramic capacitor. Any noise or ripple on VCM directly modulates the output common mode, degrading balance and distortion performance.
How does LMH6554LEE/NOPB achieve single-ended-to-differential conversion?
LMH6554LEE/NOPB achieves single-ended-to-differential conversion using its internal common-mode feedback loop: when only +IN is driven, the −OUT is actively forced to the inverse of +OUT, maintaining balance without requiring a complementary input signal. This eliminates baluns while preserving DC response, as validated in Figure 7-1 and Section 7.2.1 of the datasheet.
What external resistor tolerance is recommended for LMH6554LEE/NOPB to maintain optimal CMRR?
Texas Instruments recommends ≤0.1% tolerance for RF and RG resistors in LMH6554LEE/NOPB circuits. Mismatch >0.1% directly degrades CMRR, DC offset, and output balance error - critical for 16-bit ADC interface integrity. Section 6.3 specifies that resistor matching is the dominant factor in achieving <−64 dB balance error across frequency.
LMH6554LEE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 6200V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2.8 GHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 6.5 mV
- Current - Supply:
- 52mA
- Current - Output / Channel:
- 150 mA
- Voltage - Supply Span (Min):
- 4.7 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)
LMH6554LEE/NOPB FAQ
1.How can I place an order for LMH6554LEE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6554LEE/NOPB 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 LMH6554LEE/NOPB reliable?
The price and inventory of LMH6554LEE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6554LEE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6554LEE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6554LEE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6554LEE/NOPB?
LMH6554LEE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6554LEE/NOPB 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 LMH6554LEE/NOPB?
For technical support, including LMH6554LEE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6554LEE/NOPB requirements.
6.How does Aetrix verify that LMH6554LEE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6554LEE/NOPB 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 LMH6554LEE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6554LEE/NOPB?
All LMH6554LEE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6554LEE/NOPB, 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 LMH6554LEE/NOPB part is unused and in its original packaging.
Return procedure for LMH6554LEE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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