Features and Benefits
- 800MHz –3dB Small-Signal Bandwidth
- Continuously-Adjustable Gain Control
- –14dB to +17dB Linear-in-dB Gain Range
- 35dBm OIP3 at 240MHz Across All Gain Settings
- 10dB Noise Figure at Maximum Gain
- (IIP3 – NF) = +8dBm at 240MHz Across All Gains
- 2.7nV/√Hz Input Referred Noise
- Differential Inputs and Outputs
- 50Ω Input Impedance Across all Gains
- Single Supply Operation from 3V to 3.6V
- 110mA Supply Current
- 4mm × 4mm × 0.75mm 24-Pin QFN Package
The LTC6412 is a fully differential variable gain amplifier with linear-in-dB analog gain control. It is designed for AC-coupled operation in IF receiver chains from 1MHz to 500MHz. The part has a constant OIP3 across a wide output amplitude range and across the 31dB gain control range. The output noise (NF + Gain) is also fl at versus gain to provide a uniform spurious-free dynamic range (SFDR) >120dB over the full gain control range at 240MHz.
The LTC6412 is ideal for interfacing with the LT5527 and LT5557 downconverting mixers, LTC6410-6 IF amplifier and the LTC6400/LTC6401/LTC6416 ADC drivers for use in 12-, 14-, and 16-bit ADC applications.
The LTC6412 recovers quickly from an overdrive condition, and the EN pin allows for a fast output signal disable to protect sensitive downstream components. Asserting the SHDN pin reduces the current consumption below 1mA for power-down or sleep modes.
- IF Signal Chain Automatic Gain Control (AGC)
- 2.5G and 3G Cellular Basestation Transceivers
- WiMAX, WiBro, WLAN Receivers
- Satellite and GPS Receiver IF
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
R532 Reliability Data3/26/2018
High Speed Amplifiers/ADC Drivers4/29/2015
Analog VGA Simplifies Design and Outperforms Competing Gain Control Methods9/1/2009 LT Journal
Software & Systems Requirements
Tools & Simulations
Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.
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.
LTC6412 Companion Parts
Recommended µModule Receiver
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|
|LTC6412CUF#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC6412CUF#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC6412IUF#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|LTC6412IUF#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R532 Reliability Data|
Sample & Buy
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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.