EL2120
100MHz Current Feedback Amplifier
Typical Diagram
Key Features
- Excellent differential gain and phase on ±5V to ±15V supplies
- 100MHz -3dB bandwidth from gains of ±1 to ±10
- 700V/µs slew rate
- 0.1dB flatness to 20MHz
- Output disable in 50ns - remains high impedance even when driven with large slew rates
- Single +5V supply operation
- AC characteristics are lot and temperature stable
- Available in small SO-8 package
Description
The EL2120 is a wideband current feedback amplifier optimized for video performance. Its 0.01% differential gain and 0.03o differential phase performance when at ±5V supplies exceeds the performance of other amplifiers running on ±15V supplies. Operating on ±8 to ±15V supplies reduces distortions to 0.01% and 0.01o and below. The EL2120 can operate with supplies as low as ±2.5V or a single +5V supply.
Being a current feedback design, bandwidth is a relatively constant 100MHz over the ±1 to ±10 gain range. The EL2120 has been optimized for flat gain over frequency and all characteristics are maintained at positive unity gain. Because the input slew rate is similar to the 700V/µs output slew rate the part makes an excellent high-speed buffer.
The EL2120 has a superior output disable function. Time to enable or disable is 50ns and does not change markedly with temperature. Furthermore, in disable mode the output does not draw excessive currents when driven with 1000V/µs slew rates. The output appears as a 3pF load when disabled.
Applications
- Video gain blocks
- Residue amplifiers
- Multiplexers
- Current-to-voltage converters
- Coax cable drivers with gain of 2
- ADC drivers
