General Information22
Table 1-lb. Supplemental Characteristics for Series 664xA (continued)1
Parameter Agilent Model Number
6641A 6642A 6643A 6644A 6645A
Maximum AC Line Current Ratings
100 Vac nominal:
120 Vac nominal:
220 Vac nominal:
230 Vac nominal:
240 Vac nominal:
4.4 A rms
3.8 A rms
2.2 A rms
2.1 A rms
2.0 A rms
Maximum Reverse Bias Current:
With AC input power applied and the dc output reverse
biased by an external dc source, the supply will continuously
withstand without damage a current equal to its output
current rating (see Table 1- 1a).
Remote Sensing Capability
Voltage Drop Per Lead:
Load Regulation:
Load Voltage:
Up to 1/2 of rated output voltage.
Add 3 mV to spec (see Table l-la) for each l-volt change in
the + output lead due to load current changes.
Subtract voltage drop in load leads from specified output
voltage rating.
Command Processing Time (Average time for output voltage to change after receipt of digital data when the supply
is connected directly to the GPIB Bus):
20 ms
Downprogrammer Current Capability (± 15%):
5.8 A 2.5 A 1.5 A 0.9 A 0.75 A
Output Voltage Programming Response Time
Rise/Fall Time (time for output to change from 90 % to 10% or from 10% to 90% of its total excursion):
<15 ms
Settling Time (time for output change to settle within 1 LSB (0.025% x rated voltage) of its final value):
<60 ms
Monotonicity:
Output is monotonic over entire rated voltage, current, and
temperature range.
Auto-Parallel Configuration:
Up to 3 identical models
Analog Programming (IP & VP)
Input Signal:*
Input Impedance:
*Signal source must be isolated.
0 to -5 V
10 kΩ, nominal
Current Monitor Output (+IM):
0 to -5 V represents zero to full-scale current output
Savable States
Nonvolatile Memory Locations:
Nonvolatile Memory Write Cycles:
Prestored State (factory default):
5 ( 0 through 4)
40,000, typical
Location 0
Notes: lFor Performance Specifications, see Table l-la.