Signal Conditioning
Operational Amplifiers (Op Amps)
High Speed Amplifiers
Signal Conditioning
Operational Amplifiers (Op Amps)
Differential Amplifiers
High Frequency & Optical
IF Amplifiers / ADC Drivers
LTC6400-20 - 1.8GHz Low Noise, Low Distortion Differential ADC Driver for 300MHz IF
Features
- 1.8GHz –3dB Bandwidth
- Fixed Gain of 10V/V (20dB)
- –94dBc IMD3 at 70MHz (Equivalent OIP3 = 51dBm)
- –65dBc IMD3 at 300MHz (Equivalent OIP3 = 36.5dBm)
- 1nV/rHz Internal Op Amp Noise
- 2.1nV/rHz Total Input Noise
- 6.2dB Noise Figure
- Differential Inputs and Outputs
- 200ohm Input Impedance
- 2.85V to 3.5V Supply Voltage
- 90mA Supply Current (270mW)
- 1V to 1.6V Output Common Mode Voltage, Adjustable
- DC- or AC-Coupled Operation
- Max Differential Output Swing 4.4VP-P
- Small 16-Lead 3mm × 3mm × 0.75mm QFN Package
Typical Application
Description
The LTC6400-20 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 LTC6400-20 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 20dB (10V/V).
The LTC6400-20 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6400-20 is packaged in a compact 16-lead 3mm x 3mm QFN package and operates over the –40°C to 85°C temperature range.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
QFN-16
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- 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 | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC6400CUD-14 | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-14#PBF | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-14#TR | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-14#TRPBF | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-20 | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-20#PBF | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-20#TR | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-20#TRPBF | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-26 | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-26#PBF | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-26#TR | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-26#TRPBF | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-8 | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-8#PBF | QFN | 16 | C | $4.57 | $3.20 | View |
| LTC6400CUD-8#TR | QFN | 16 | C | $3.26 | View | |
| LTC6400CUD-8#TRPBF | QFN | 16 | C | $3.26 | View | |
| LTC6400IUD-14 | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-14#PBF | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-14#TR | QFN | 16 | I | $3.74 | View | |
| LTC6400IUD-14#TRPBF | QFN | 16 | I | $3.74 | View | |
| LTC6400IUD-20#PBF | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-20#TRPBF | QFN | 16 | I | $3.74 | View | |
| LTC6400IUD-26 | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-26#PBF | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-26#TR | QFN | 16 | I | $3.74 | View | |
| LTC6400IUD-26#TRPBF | QFN | 16 | I | $3.74 | View | |
| LTC6400IUD-8 | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-8#PBF | QFN | 16 | I | $5.26 | $3.68 | View |
| LTC6400IUD-8#TR | QFN | 16 | I | $3.74 | View | |
| LTC6400IUD-8#TRPBF | QFN | 16 | I | $3.74 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request 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 |
|---|---|---|---|
| DC1004A-06H | Combo Demoboard for LTC2207 and LTC6400-20( 20dB) | Contact Factory | |
| DC987B-C | LTC6400-20 3GHz Fully Differential ADC Driver Demo Circuit | $80.00 | |
| Buy Now | |||
Applications
- Differential ADC Driver
- Differential Driver/Receiver
- Single Ended to Differential Conversion
- IF Sampling Receivers
- SAW Filter Interfacing
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Related models available in LTspice IV
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.
