Application Note 123 introduces the LTC6400 differential amplifier/ADC driver and provides design optimization recommendations for low distortion, low noise, gain and power options, input considerations, dynamic range and output networks, stability, and layout considerations.
The document introduces the Linear Technology LTC6400 family of ADC drivers, designed to meet the requirements of modern high-speed analog-to-digital converters. Key features include low distortion (equivalent output IP3 = 51dBm), low input-referred noise density (1.4nV/√Hz), and operation at frequencies up to 70MHz with power dissipation as low as 120mW on a single 3V supply.
| Distortion (at 70MHz) | -94dBc |
|---|---|
| Equivalent Output IP3 | 51dBm |
| Input-referred noise density | 1.4nV/√Hz |
| Supply Voltage | 3V |
| Package Size | 3mm x 3mm QFN |
The LTC6400 family boasts distortion as low as –94dBc.
The input-referred noise density is 1.4nV/√Hz.
No, the output does not require any impedance-matching components when driving an ADC.