LTC6400-26 - 1.9GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz
Features
- 1.9GHz -3dB Bandwidth
- Fixed Gain of 20V/V (26dB)
- -94dBc IMD3 at 70MHz (Equivalent OIP3 = 51dBm)
- -71dBc IMD3 at 300MHz (Equivalent OIP3 = 39.5dBm)
- 1nV/√Hz Internal Op Amp Noise
- 1.5nV/√Hz Total Input Referred Noise
- 6.8dB Noise Figure
- Differential Inputs and Outputs
- 50Ω 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 4.7VP-P
- Small 16-Lead 3mm × 3mm x 0.75mm QFN Package
Typical Application
Description
The LTC6400-26 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 LTC6400-26 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 of transformers or AC-coupling capacitors in many applications. The gain is internally fixed at 26dB (20V/V).
The LTC6400-26 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6400-26 is packaged in a compact 16-lead 3mm x 3mm QFN package and operates over the -40°C to 85°C 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 |
|---|---|---|---|---|---|
| LTC6400CUD-26#PBF | 3x3 QFN-16 | UD | C | 05-08-1691 | Yes |
| LTC6400CUD-26#TRPBF | 3x3 QFN-16 | UD | C | 05-08-1691 | Yes |
| LTC6400IUD-26#PBF | 3x3 QFN-16 | UD | I | 05-08-1691 | Yes |
| LTC6400IUD-26#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 | |
|---|---|---|---|---|---|---|
| LTC6400CUD-26#PBF | 3x3 QFN-16 | C | $4.57 | $3.20 | Yes | |
| LTC6400CUD-26#TRPBF | 3x3 QFN-16 | C | $3.26 | Yes | ||
| LTC6400IUD-26#PBF | 3x3 QFN-16 | I | $5.26 | $3.68 | Yes | |
| LTC6400IUD-26#TRPBF | 3x3 QFN-16 | I | $3.74 | 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 |
|---|---|---|---|
| DC987B-D | LTC6400-26 3GHz Fully Differential ADC Driver Demo Circuit | $100.00 | |
| Buy Now | |||
Applications
- Differential ADC Driver
- Differential Driver/Receiver
- Single Ended to Differential Conversion
- IF Sampling Receivers
- SAW Filter Interfacing
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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:
LTC6400-14
LTC6400-20
LTC6400-26
LTC6400-8
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.
