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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
DR9 Driver/Receiver Board H-9
Description
Characteristics
Output Resolution
< 5 mV
Output Accuracy (DVH and DVL)
± (50mV + 1% of PV) Slow, Default, Medium
slew settings
± (75mV + 1% of PV) Fast slew setting
Output Drive Current
± 85 mA typical (Source/Sink)
Output Impedance
(Selectable/Channel)
Direct (12 Ω) or Series (50 Ω), ± 4 Ω
Slew Rate (Selectable/Channel or
custom)
0.25 V/ns
0.7 V/ns, 1.0 V/ns or 1.3 V/ns: typical
Input Threshold Ranges*
-14.75 V to +14 V (VM0)
-6.75 V to +21 V (VM1)
Input Threshold Resolution
< 5 mV
Input Threshold Accuracy (CVH and
CVL)
± (50mV + 1% of PV)
Skew (Chan. to Chan.)
< 3 ns (drive and compare)
Current Source/Sink
(Programmable/Channel)
Range: ±0.4 mA to ±20 mA (usable to 24 mA)
Resolution: < 10 μA
Accuracy: 3% of PV + 120uA
Commutating Voltage: V
com
(CMH
and CML)
Range: same as driver
Resolution: < 5 mV
Accuracy:
± (50mV + 1% of PV)
Over Current Alarm (IAH and IAL)
Range: ±800 mA
Resolution: < 30
μA
Accuracy: ± (50mA + 1% of PV)
Resistive Loads
(Selectable/Channel)
140 Ω to ~1 KΩ (8 selections) to Vcom
Accuracy: 30%
PMU capability
Voltage Range/Resolution/Accuracy: same as
driver
DUT_GND Reference Input
(per Driver/Receiver board)
Offset range: ±3 V
Interrupt Voltage: 390 mV
Resistive load: 100 kΩ
Bypass Relay: On or Off
Power Input Using Optional Front
Panel Power Input Conncector
(for Pin Electronics devices)
V+: 10 to 28 V
V-: -4 to -19 V
V+ to V- delta: <32 V
DR9 Channel Over-voltage
Protection
Clamped to 0.4 V beyond V+ or V-
•
Max current 200mA for < 10ms
Auto Shutdown:
•
DC level within 1 V of V+ or V-
•
A 5 µs spike exceeding V+ or V-
Channel Capacitance
<120 pF
Channel Crosstalk
<250 mV pk-pk