Agilent/Keysight 6655A DC Power Supply

The Agilent/Keysight 6655A is a single-output DC power supply delivering 480 W across a 0–120 V, 0–4 A range. Designed for automated test systems and high-throughput production environments, this instrument combines precise voltage and current programming with exceptional transient response and low-noise output characteristics.

– Technical Specifications

Output Ratings
• Single output: 0–120 V, 0–4 A at 40°C (3.6 A at 50°C, 3.4 A at 55°C)
• Total power: 480 W

Programming & Readback Accuracy (at 25°C ± 5°C)
• Voltage programming: 0.06% + 51 mV
• Current programming: 0.15% + 4 mA
• Voltage readback: 0.07% + reading offset
• Current readback: 0.15% + reading offset

Output Quality
• Voltage ripple and noise (20 Hz–20 MHz): 700 µV RMS, 7 mV peak-to-peak
• Current noise: 2 mA RMS
• Load regulation: 1 mV (voltage), 2 mA (current)
• Line regulation: 0.5 mV (voltage), 2 mA (current)

Response Characteristics
• Programming response: 15 ms rise/fall time (10–90%), 60 ms settling to 1 LSB
• Command processing time: 20 ms (GPIB-connected)
• Transient recovery: <100 µs to within 0.1% of rated voltage or 20 mV (whichever is greater) after 50% load step

Resolution
• Voltage: 2 mV average
• Current: 15 mA average
• OVP accuracy: 160 mV

– Key Features

• GPIB (IEEE 488.2) primary interface with SCPI command compatibility
• Analog control inputs for voltage and current programming
• Daisy-chain capability: up to 16 supplies via single GPIB address
• VXIplug&play driver support for test system integration
• Fast crowbar and mode crossover protection
• LCD readout with fan speed control to minimize acoustic noise
• Input: 1,380 VA (1,100 W at full load, 120 W no-load); 47–63 Hz

– Physical Specifications

• Dimensions: 425.5 mm W × 132.6 mm H × 497.8 mm D
• Weight: 25 kg (net), 28 kg (shipping)

– Typical Applications

Automated test systems, semiconductor characterization, component screening, laboratory benchtop development, and production-level functional testing requiring stable, low-noise DC power with fast transient response.