Features and Benefits
- 2.2GHz –3dB Bandwidth
- Fixed Gain of 2.5V/V (8dB)
- –99dBc IMD3 at 70MHz (Equivalent OIP3 = 53.4dBm)
- –61dBc IMD3 at 300MHz (Equivalent OIP3 = 34.8dBm)
- 1nV/√Hz Internal Op Amp Noise
- 7.6dB Noise Figure
- Differential Inputs and Outputs
- 400Ω Input Impedance
- 2.85V to 3.5V Supply Voltage
- 85mA Supply Current (255mW)
- 1V to 1.6V Output Common Mode, Adjustable
- DC- or AC-Coupled Operation
- Max Differential Output Swing 4.8VP-P
- Small 16-Lead 3mm × 3mm × 0.75mm QFN Package
The LTC6400-8 is a high-speed differential amplifier targeted at processing signals from DC to 300MHz. The part has been specifically designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block.
The LTC6400-8 is easy to use, with minimal support circuitry required. The output common mode voltage is set using an external pin, independent of the inputs, which eliminates the need for transformers or AC-coupling capacitors in many applications. The gain is internally ﬁxed at 8dB (2.5V/V).
The LTC6400-8 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6400-8 is packaged in a compact 16-lead 3mm × 3mm QFN package and operates over the –40°C to 85°C temperature range.
- Differential ADC Driver
- Differential Driver/Receiver
- Single Ended to Differential Conversion
- IF Sampling Receivers
- SAW Filter Interfacing
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 (1)
DC987B-A: Demo Board for the LTC6400-8 2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz.
Documentation & Resources
R532 Reliability Data3/26/201831 K
DC987B - Demo Manual9/24/2009207K
High Speed Amplifiers/ADC Drivers4/29/2015152K
SiGe Differential Amplifier Drives High Speed ADCs at Hundreds of MHz6/1/2007 LT Journal
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
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.
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|
|LTC6400CUD-8#PBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|LTC6400CUD-8#TRPBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|LTC6400IUD-8#PBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|LTC6400IUD-8#TRPBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R532 Reliability Data|
Support & Discussions
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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.