LMH6518SQ Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
LMH6518SQ is a digitally controlled variable gain amplifier from Texas Instruments. Features programmable gain via SPI interface, 900 MHz bandwidth, and low noise. Ideal for medical imaging, test equipment, and communications systems.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LMH6518SQ Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Digitally programmable gain control via SPI interface with 32 gain steps
- Wide 900 MHz bandwidth supporting high-speed signal processing
- Low noise figure enabling high-fidelity signal amplification
- Voltage-feedback operational amplifier architecture with 45 dB minimum CMRR
- Compact 16-pin Quad Flat No-Lead (QFN) package for space-constrained designs
Applications
The LMH6518SQ is widely used in medical imaging equipment such as ultrasound machines where variable gain amplification is critical for signal conditioning. It is also employed in automated test and measurement instruments, software-defined radios, and wideband communications receivers that require precise, digitally adjustable gain control.
Specifications
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 140 µA |
| Bias Current-Max (IIB) @25C | 100 µA |
| Common-mode Reject Ratio-Min | 45dB |
| Common-mode Reject Ratio-Nom | 86dB |
| Frequency Compensation | YES |
| JESD-30 Code | S-XQCC-N16 |
| JESD-609 Code | e0 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | UNSPECIFIED |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 235 |
| Power | NO |
| Programmable Power | NO |
| Supply Current-Max | 230mA |
| Supply Voltage Limit-Max | 5.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Tin/Lead (Sn85Pb15) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Wideband | NO |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the gain control range and interface of the LMH6518SQ?
The LMH6518SQ offers digitally programmable gain control via a 3-wire SPI interface, providing 32 discrete gain steps. This allows precise gain adjustment in high-speed signal chains without manual hardware changes, making it ideal for automated test systems and adaptive receivers.
What are the key bandwidth and noise specifications of the LMH6518SQ?
The LMH6518SQ features a bandwidth of approximately 900 MHz, enabling high-frequency signal amplification. It has a maximum bias current (IIB) of 100 µA at 25°C and a minimum common-mode rejection ratio (CMRR) of 45 dB, with a nominal CMRR of 86 dB for excellent noise rejection.
What are the typical applications for the LMH6518SQ amplifier?
The LMH6518SQ is commonly used in medical ultrasound front-end signal conditioning, wideband communications receivers, automated test and measurement equipment, and software-defined radio platforms. Its digitally controlled gain makes it well-suited for any application requiring dynamic amplitude control over wide bandwidths.
What package type does the LMH6518SQ come in and what does that mean for PCB design?
The LMH6518SQ is available in a 16-pin Quad Flat No-Lead (QFN) package, which provides a compact footprint and excellent thermal performance. The exposed pad on the bottom of the package aids heat dissipation, and the small size is beneficial for high-density PCB layouts in portable or space-constrained applications.
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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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