Features and Benefits
- Output IP3 at 100MHz: 47dBm
- Maximum Output Power: 21dBm
- Bandwidth: LF to 850MHz
- Propagation Delay: 0.8ns
- Maximum Gain: 33dB
- Noise Figure: 7.3dB (Max Gain)
- Gain Control Range: 22.5dB
- Gain Control Step: 1.5dB
- Gain Control Settling Time: 500ns
- Output Noise Floor: –134dBm/Hz (Max Gain)
- Reverse Isolation: –80dB
- Single Supply: 4.75V to 5.25V
- Low Power Mode
- Shutdown Mode
- Enable/Disable Time: 1µs
- Differential I/O Interface
- 20-Lead TSSOP Package
The LT5514 is a programmable gain amplifier (PGA) with bandwidth extending from low frequency (LF) to 850MHz. It consists of a digitally controlled variable attenuator, followed by a high linearity amplifier. The amplifier is configured with two identical transconductance amplifiers, hard wired in parallel with individual dedicated enable pins. When both amplifiers are enabled (Standard mode), the LT5514 offers an OIP3 of +47dBm (at 100MHz). Power dissipation can be reduced when a single amplifier is enabled (Low Power mode). Four parallel digital inputs control the gain over a 22.5dB range with 1.5dB step resolution. An on-chip power supply regulator/filter helps isolate the amplifier signal path from external noise sources.
The LT5514’s open-loop architecture offers stable operation for any practical load conditions, including peaking-free AC response when driving capacitive loads, and excellent reverse isolation.
The LT5514 may be operated broadband, where the output differential RC time constant sets the bandwidth, or it may be used as a narrowband driver with the appropriate output filter.
- High Linearity ADC Driver
- IF Sampling Receivers
- VGA IF Power Amplifier
- 50Ω Driver
- Instrumentation Applications
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
R409 Reliability Data3/23/2018
DC550A - Demo Manual9/24/2009
High Speed Amplifiers/ADC Drivers4/29/2015
Tools & Simulations
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
LT5514 Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT5514EFE#PBF||Material Declaration||Reliability Data||20-Lead TSSOP w/ EP|
|LT5514EFE#TRPBF||Material Declaration||Reliability Data||20-Lead TSSOP w/ EP|
|Wafer Fabrication Data||R409 Reliability Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.