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Low Noise Preamplifier
World’s top level preamplifier with extremely low noise
SA-200 series / SA-400 series
Wide voltage range measurement (sub micro-Volt to milli-Volt) Wide frequency range measurement (DC to 100MHz) Covering the various signal source impedance
SA series are preamplifiers for submicro-signal detection, which have been developed to assure noise reduction never achieved before. 9 types of SA series amplifiers, which vary by a frequency, input form, and input impedance, are available.
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| Frequency Range | Input Form | Input Impedance | Voltage Noise* | Current Noise* | Noise Figure* | Voltage Gain | |
|---|---|---|---|---|---|---|---|
| SA-200F3 | DC to 800kHz | Single-ended | 1kΩ/10kΩ/100kΩ | 0.5nV/√Hz | 2.2pA/√Hz | - | 40dB |
| SA-220F5 | 1kHz to 80MHz | Single-ended | 1MΩ | 0.5nV/√Hz | 200fA/√Hz | - | 46dB |
| SA230F5 | 1kHz to 100MHz | Single-ended | 50Ω | 0.25nV/√Hz | 5.0pA/√Hz | 0.6dB | 46dB |
| SA240F5 | DC to 20MHz | Single-ended | 1MΩ/10MΩ/open | 1.2nV/√Hz | 5fA/√Hz | - | 46dB |
| SA410F3 | DC to 1MHz | Differential | 1kΩ/10kΩ/100kΩ | 0.75nV/√Hz | 4.5pA/√Hz | - | 40dB |
| SA420F5 | 1kHz to 70MHz | Differential | 1MΩ | 0.9nV/√Hz | 100fA/√Hz | - | 46dB |
| SA421F5 | 30Hz to 30MHz | Differential | 1MΩ | 0.5nV/√Hz | 100fA/√Hz | - | 46dB |
| SA430F5 | 1kHz to 100MHz | Differential | 50Ω | 0.35nV/√Hz | 7.0pA/√Hz | 1.10dB | 46dB |
| SA440F5 | DC to 20MHz | Differential | 1MΩ/10MΩ/open | 1.8nV/√Hz | 25fA/√Hz | - | 40dB |
*Typical value
Extremely low-noise characteristics
Equivalent input noise voltage density against Cut-off frequency
Equivalent input noise voltage density against input impedance
Wide measurement range (Amplifies extremely small voltage such as sub micro-Volt.)
Input voltage against frequency
Applications
SA series are used to foster versatility as sensor head amplifiers or preamplifier for sensitivity improvement and noise reduction in analyzers and measurement instruments.
- Superconducting device in quantum computers
- MCT (Mercury Cadmium Tellurium) sensor for infrared detection
- Squid sensor for micro-magnet detection
- High-temperature superconducting Josephson device for microwave detection
- Electromagnetic sensor for MRI systems
- Photodetector such as a photo-multiplier and photo-transistor
- Improving sensitivity of lock-in amplifiers