Description

The J2181A is a low noise preamplifier that provides a fixed, AC-coupled 60dB gain while converting a 1 MOhm input impedance to a 50 Ohm output impedance.

With a 3dB bandwidth of 10Hz to 1MHz, the preamplifier improves the sensitivity of oscilloscopes, network analyzers, and spectrum analyzers, while reducing the effective noise floor and spurious response.

The J2181A includes wrap-around high-permeability shielding to reduce susceptibility to ambient noise. The preamplifier also serves as a low-frequency DC blocker (6.3V) for a spectrum analyzer or you can use it to connect a high-input impedance oscilloscope probe to 50 Ohm equipment.

The J2181A preamplifier offers very low noise, fast 100V/uS slew rate for ultra-low noise measurement for PLL, LNA, ADC power rails, and ultra-low noise voltage references and regulators, using an oscilloscope or spectrum analyzer. A typical noise plot shows the noise is 1.5nV/rt_Hz.

Key Features

• High Gain – 60dB
• Wide bandwidth 10Hz – 1MHz – Very Flat Response
• Ultra-Low Noise amplifier
• Integrated bi-direction DC-Block
• Works with near-field probes for EMI troubleshooting
• Improves effective noise floor and spurious response
• Works with all oscilloscopes, spectrum analyzers, and network analyzers
• Compatible with the P2106A probe for ultra-low noise measurement to 2MHz
• Available with J2171A external power supply (standard) or rechargeable battery (J2181B) USB-PD charging

What’s included

• J2181A Ultra Low Noise Preamp
• J2171A High PSRR Regulated Adapter
• User manual
• 1 Year Warranty