LT6402-20 - 300MHz Low Distortion, Low Noise Differential Amplifier/ADC Driver (AV = 20dB)
Features
- 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
Typical Application
Description
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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT6402CUD-20#PBF | 3x3 QFN-16 | UD | C | 05-08-1691 | Yes |
| LT6402CUD-20#TRPBF | 3x3 QFN-16 | UD | C | 05-08-1691 | Yes |
| LT6402IUD-20#PBF | 3x3 QFN-16 | UD | I | 05-08-1691 | Yes |
| LT6402IUD-20#TRPBF | 3x3 QFN-16 | UD | I | 05-08-1691 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT6402CUD-20#PBF | 3x3 QFN-16 | C | $3.39 | $2.39 | Yes | |
| LT6402CUD-20#TRPBF | 3x3 QFN-16 | C | $2.45 | Yes | ||
| LT6402IUD-20#PBF | 3x3 QFN-16 | I | $3.90 | $2.75 | Yes | |
| LT6402IUD-20#TRPBF | 3x3 QFN-16 | I | $2.81 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC954A-C | LT6402-20 300MHz diff In/Out ADC Driver | $50.00 | |
| Buy Now | |||
Applications
- Differential ADC Driver for:
Imaging
Communications - Differential Driver/Receiver
- Single Ended to Differential Conversion
- Differential to Single Ended Conversion
- Level Shifting
- IF Sampling Receivers
- SAW Filter Interfacing/Buffering
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LT6402-12
LT6402-20
LT6402-6
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
