HA-5101
Single 10MHz and 100MHz, Low Noise Operationals Amplifier
Not Recommended for New Designs.
Recommended Replacement Parts HA-2525, HA-2842.
Typical Diagram

Key Features
- Low Noise 3.0nV/√Hz at 1kHz
- Bandwidth 10MHz
- Slew Rate 10V/µs
- Low Offset Voltage Drift 3µV/oC
- High Gain 1 x 106V/V
- High CMRR/PSRR 100dB
- High Output Drive Capability 30mA
Description
The HA-5101 is a dielectrically isolated operational amplifier featuring low noise, (3.0nV/√Hz at 1kHz). DC characteristics of the HA-5101 assure accurate performance. The 0.5mV offset voltage is externally adjust- able and offset voltage drift is just 3µV/oC. An offset current of only 30nA reduces input current errors and an open loop voltage gain of 1 x 106V/V increases loop gain for low distortion amplification.
The HA-5101 is ideal for audio applications, especially lowlevel signal amplifiers such as microphone, tape head and phono cartridge preamplifiers. Additionally, it is well suited for low distortion oscillators, low noise function generators and high Q filters.
Applications
- High Quality Audio Preamplifiers
- High Q Active Filters
- Low Noise Function Generators
- Low Distortion Oscillators
- Low Noise Comparators
- For Further Design Ideas, See Application Note AN554

