Picotest
Picotest J2171A High PSRR Regulated Adapter - Precision Power Supply for Signal Injectors
Picotest J2171A High PSRR Regulated Adapter - Precision Power Supply for Signal Injectors
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Key Features
- Universal AC input voltage (100V-240V) for worldwide use
- +/-12V 200mA output with ultra-high PSRR
- Very low noise for precise measurements
- Low output impedance, even at high frequencies
- Stable performance with large ceramic decoupling capacitors
- Discrete design approach for superior performance
- Compatible with Picotest J2110A, J2111A, J2112A, J2113A, and other signal injectors
Overview
The Picotest J2171A High PSRR Regulated Adapter is a specialised power supply designed for Picotest signal injectors, including the J2110A, J2111A, J2112A, and J2113A. This adapter offers superior performance to off-the-shelf alternatives, featuring a universal worldwide input of 100-240 VAC and dual high-performance linear regulators. The J2171A delivers +/-12V output at 200mA with ultra-high PSRR, low noise, and low output impedance.
Unlike typical switching regulators that produce significant ripple above 100kHz, the J2171A employs a discrete design approach. This results in stable performance with large ceramic decoupling capacitors and exceptional PSRR. The adapter maintains a low noise floor, which is crucial for precise measurements in professional engineering applications. Its low output impedance at high frequencies overcomes the limitations of standard power supplies, making it ideal for demanding electronic design and testing scenarios.
The J2171A has a comprehensive user manual and a one-year warranty, ensuring reliability and support for professional design engineers. Its compact design and worldwide voltage compatibility make it a versatile tool for electronic laboratories and field testing environments.
While there are many off-the-shelf power supplies available that can provide a universal input voltage and 12V output voltage, they do not provide the same performance as the J2170B. Most switching regulators produce significant ripple at and above 100kHz. This ripple passes through the PSRR of the internal opamps, reducing the noise floor. While this may work in many applications, it is less than ideal. Typical switching power supplies and even typical linear regulators have a high output impedance at 40MHz, due to the ESL of the output capacitors and the nature of the control loop.The Picotest J2170B uses a discrete design approach, offering very low output impedance, stable performance with large ceramic decoupling capacitors and ultra high PSRR compared with typical off-the-shelf devices. To maintain a good noise floor for various measurements, the power supply must have very low noise.
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