Features and Benefits
- 300 MHz –3dB Bandwidth
- Fixed Gain of 20dB
- Low Distortion:
- 48.5dBm OIP3, –81dBc HD3 (20MHz, 2VP-P)
- Low Noise:
- 12.4dB NF, en= 1.9nV/√Hz (20MHz)
- Differential Inputs and Outputs
- Additional Filtered Outputs
- Adjustable Output Common Mode Voltage
- DC- or AC-Coupled Operation
- Minimal Support Circuitry Required
- Small 0.75mm Proﬁle 16-Lead 3mm × 3mm QFN Package
The LT6402-20 is a low distortion, low noise differential ampliﬁer/ADC driver for use in applications from DC to 300MHz. The LT6402-20 has been designed for ease of use, with minimal support circuitry required. Exceptionally low input-referred noise and low distortion (with either single-ended or differential inputs) make the LT6402-20 an excellent solution for driving high speed 12-bit and 14-bit ADCs. In addition to the normal unfiltered outputs (+OUT and –OUT), the LT6402-20 has a built-in 75MHz differential low pass filter and an additional pair of filtered outputs (+OUTFILTERED, –OUTFILTERED) to reduce external filtering components when driving high speed ADCs. The output common mode voltage is easily set via the VOCM pin, eliminating an output transformer or AC-coupling capacitors in many applications.
The LT6402-20 is designed to meet the demanding requirements of communications transceiver applications. It can be used as a differential ADC driver, a general-purpose differential gain block, or in other applications requiring differential drive. The LT6402-20 can be used in data acquisition systems required to function at frequencies down to DC.
The LT6402-20 operates on a 5V supply and consumes 30mA. It comes in a compact 16-lead 3mm × 3mm QFN package and operates over a –40ºC to 85ºC temperature range.
- Differential ADC Driver for:
- Differential Driver/Receiver
- Single Ended to Differential Conversion
- Differential to Single Ended Conversion
- Level Shifting
- IF Sampling Receivers
- SAW Filter Interfacing/Buffering
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)
DC954A-C: Demo Board for the LT6402-20 300MHz Low Distortion, Low Noise Differential Amplifier/ADC Driver (AV = 20dB).
Documentation & Resources
R512 Reliability Data3/26/201820 K
DC954A - Demo Manual9/24/2009200K
High Speed Amplifiers/ADC Drivers4/29/2015152K
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|
|LT6402CUD-20#PBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|LT6402CUD-20#TRPBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|LT6402IUD-20#PBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|LT6402IUD-20#TRPBF||Material Declaration||Reliability Data||16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R512 Reliability Data|
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