PDVS 2 Mini v2 - ADR1399

PDVS 2 Mini v2 - ADR1399

Precision Digital Voltage Source. The well known and proven PDVS 2 Mini with further incremental improvements for v2.

For more on the background and measurements, see the v2 development blog posts.

• Careful changes to the analogue section:
  • Improved step response with faster risetime and elimination of ~25% overshoot
    
  •  Lower noise, both in low-frequency (0.1–10 Hz) and wideband (10 Hz–10 kHz) ranges — roughly half of v1 levels
  • Improved temperature coefficent to below -0.2ppm/K for units tested
    
  • All units now equipped with the ADR1399 reference and gold plated output jacks

• Further updates and enhancements:
  • Integration of the charging PCB onto the main PCB. Changed DC connector size to standard 2.5x5.5 mm and not mounted recessed anymore so all styles of connectors can be used (instead of specific slim ones for v1 units)
  • New microcontroller at faster clock speed and large parts of firmware rewritten for snappier feel and more stable serial connection (now up to 230400 baud, fully compatible with the IUSL)
  • Combination of power and ok buttons and software changes to avoid accidential turn offs

Functions and Features: 

• True 0 to 10.22222 V DC user adjustable output in 10 µV steps
• Integrated digital temperature sensor for internal temperature readout with 0.1°C resolution, internal and ambient temperature noted on calibration certificate
• Fully remote controllable via serial connection, incl. output of internal temperature and further parameters
  
• All digital calibration, full recalibration and adjustment possible by user
• Integrated battery management IC to charge 9V Li-Ion batteries, incl. battery voltage monitor, low voltage warning, autoshutdown, charging status and battery reverse polarity protection

Specification Summary

• Voltage reference: ADR1399
• 0.00000 V to 10.22222 V in 10 µV (0.00001 V) steps
• Load = 10mA max; internally protected against indefinite short circuiting of output
• Accuracy = Within 50 µV. Typically 0.0005% at 10 V output
• Stability = 0.00005 V variation worst case. Orientation of the unit may effect output (calibrated horizontally), as will powering from external DC source
• Temperature coefficient (whole unit) = Typically < 2 ppm across a 10K temperature change 
  
• Stabilization time: around 20 minutes depending on ambient temperature, coming off battery charge and last use
  
• Power (batteries) = Two Lithium-Ion re-chargeable 9V PP3 batteries (Not supplied, 600mAh batteries recommended)
• Charging (external power)  = 18 to 20 V DC. For battery charging, 250 mA max. charge current. Uses a standard 2.5x5.5mm barrel jack connector; charging cablesupplied.
• Battery consumption = ~100 mA at power up, reducing to ~50 mA when reference heater has stabilized (a few minutes)
• Battery quiescent current (unit switched off) ~4 µA.
• Battery = Approx. 12 hours typical continuous operation with recommended EBL 6F22 Li-ion 600 mAh batteries . Any rechargeable Lithium-Ion 6F22 batteries will do, ranging from 500 mAh to 1000 mAh
• Dimensions = 105 x 65x 52 mm

Included Items

• PDVS 2 Mini v2
• Charging cable with barrel plug and unterminated end
• Certificate of calibration