Fluke 867B - Power Supply Output Voltages and Currents

867B,863
Service Manual
2-6
Power Supply Output Voltages and Currents 2-6.
Refer to Table 2-2.
Table 2-2. Power Supply Outputs
Name Voltage
Tol ±
±±
± V Tol ±
±±
±%
Ripple
(peak to
peak)
mA Power Notes
VDD 5.2V 0.26 5.0% 50 mV rms** 43 mA 224 mW 0.2V p-p maximum noise
to 1 MHz BW
VAD 3.27V 0.07 2.0% 50 mV rms** 12 mA 40 mW ±0.02%/C max
VCC 3.27V 0.07 2.0% 50 mV rms** 82 mA 271 mW VAD and VCC are tied
together, unregulated
DC used for IBL+
VSS -5.2V 0.26 5.0% 50 mV rms** 32 mA 166 mW 0.2V p-p maximum noise
to 1 MHz BW
VEE -20V na 5 mA 115 mW TC = -38 mV/°C, center
value adjusted and
stored at test
IBL+ * 4V ±15% na 80 mA 264 mW current for backlight
LED, ±15%
IBL- na Current Return for IBL+,
max 1.5V burden voltage
* IBL is controlled by a linear current source taken from unregulated DC.
** Measured with an 8842A in AC rms mode.