LMH6553SD Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LMH6553SD is a high-speed fully differential amplifier with wide bandwidth and low noise, designed to drive high-speed ADC inputs and amplify differential signals in data acquisition, communications, and test equipment applications.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LMH6553SD Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LMH6553SD?
- High-speed fully differential amplifier with wide GHz-range bandwidth
- Low input voltage noise for high dynamic range ADC driving
- Differential-to-differential signal conversion with adjustable gain
- Output common-mode voltage control for direct ADC input biasing
- Low harmonic distortion suitable for 14-bit and 16-bit ADC front ends
- Compact package optimized for high-frequency PCB layout
What is LMH6553SD used for?
The LMH6553SD is deployed as an ADC driver in high-speed data acquisition systems, software-defined radio receivers, and oscilloscope front ends where maintaining signal fidelity from DC to several hundred MHz is critical. It also suits differential signal amplification in communications equipment and medical imaging systems that require low-noise, high-linearity amplification across wide bandwidths with precise output common-mode control.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the LMH6553SD datasheet?
LMH6553SD Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LMH6553SD?
Compatible alternatives and drop-in replacements for LMH6553SD:
Frequently Asked Questions
For what type of signal chain is the LMH6553SD primarily designed?
The LMH6553SD is designed as a fully differential amplifier for driving high-speed ADC inputs. It converts single-ended or differential signals to a differential output with controlled common-mode voltage, maintaining the low-noise, high-linearity performance required for 12-bit to 16-bit ADCs sampling at 100 Msps to 1 Gsps in communications and instrumentation systems.
How does the LMH6553SD's output common-mode control benefit ADC interface design?
The LMH6553SD allows the output common-mode voltage to be set via the VOCM pin, enabling the amplifier output to be biased precisely to the ADC's preferred input common-mode level (typically 0.9 V to 1.5 V for modern high-speed ADCs). This eliminates the need for AC coupling or additional bias networks, simplifying the signal path and preserving DC-coupled accuracy for frequency content down to DC.
What supply voltage and current does the LMH6553SD typically require for high-speed operation?
High-speed differential amplifiers of this class typically operate from ±5 V dual supplies or a single 5 V rail, drawing 15 mA to 25 mA quiescent current to sustain GHz-range bandwidth. The LMH6553SD is designed for these supply conditions, allowing direct integration into data acquisition boards powered from standard ±5 V linear regulators or low-noise switching supplies.
How does the LMH6553SD compare to a transformer balun for differential signal conversion in RF designs?
Unlike a passive transformer balun limited to a specific frequency band — often 10 MHz to 500 MHz — the LMH6553SD provides active gain, DC coupling, and programmable output common mode from DC through several hundred MHz. It avoids the insertion loss and impedance-matching constraints of a balun, and its low noise figure (typically 10 nV/√Hz) makes it preferable in noise-sensitive receiver front ends operating over wide instantaneous bandwidths exceeding 200 MHz.
In which instrumentation applications does the LMH6553SD provide the most value over a standard op-amp?
The LMH6553SD outperforms standard single-ended op-amps in oscilloscope and spectrum analyzer front ends where differential signal acquisition at 500 Msps or higher rejects common-mode noise and ground-loop interference. Its balanced differential architecture achieves even-order harmonic distortion cancellation, improving spurious-free dynamic range by 6 dB to 10 dB compared to single-ended stages at the same signal frequency and gain setting.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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