HP / Agilent 6625A Precision System Power Supply, 25W or 50W, 2 outputs

The HP/Agilent 6625A is a dual-output precision DC power supply delivering 25W or 50W per isolated output. It combines programmable voltage and current control with low-noise performance and comprehensive protection, making it ideal for R&D, automated test systems, and precision measurement applications. Front-panel keypad or GPIB remote control enables straightforward integration into complex test environments. The unit supports SCPI commands and VXIplug&play drivers for seamless instrument coordination.

## Technical Specifications

**Output Capability:**
Two independently isolated outputs, each configurable as either 25W or 50W. The 25W configuration offers a low range of 0–7 V, 0–15 mA and a high range of 0–50 V, 0–500 mA. The 50W configuration provides low-range operation at 0–16 V, 0–200 mA and high-range operation at 0–50 V, 0–1 A or 0–16 V, 0–2 A.

**Programming Accuracy (25°C ±5°C):**
Voltage accuracy reaches ±(0.016% of setting + 1.5 mV) in the 25W low range and ±(0.016% of setting + 10 mV) in high range. Current accuracy is ±(0.04% of setting + 15 µA) for 25W low range and ±(0.04% of setting + 100 µA) for high range. The 50W configuration delivers ±(0.016% of setting + 53 mV) voltage accuracy in low range and ±(0.016% of setting + 10 mV) in high range, with current accuracy of ±(0.04% of setting + 185 µA) and ±(0.04% of setting + 500 µA) respectively.

**Output Quality:**
Ripple and noise across 20 Hz to 20 MHz measures 500 µV RMS and 3 mV peak-to-peak in constant voltage mode, with 1 mA RMS in constant current mode. Readback accuracy tracks programming accuracy within tight tolerances across all ranges.

## Key Features

• Active down-programmer sinks full rated current with fast response time
• Programmable overvoltage and overcurrent protection
• Fast CV/CC crossover for stable operation across load transitions
• Remote sensing compensates for up to 10 V drop per load lead
• Dual isolated outputs for independent load control

## Typical Applications

Research and development, component and subsystem characterization, automated test system integration, and precision power delivery to analog and digital circuits.

## Compatibility & Integration

GPIB remote control interface with SCPI command support and VXIplug&play driver availability enable direct integration into test automation frameworks.