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Crossfire GX1 - PWM Output Signal Specifications

Crossfire GX1
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CrossFire GX1
Date: Apr 26, 11
Manual and reference handbook
www.crosscontrol.com
18
Electrical Characteristics for Analog Inputs
Signal Name
Parameter
Value
Unit
Comment
Min
Typ
Max
Analog Input
Channel B
0 5 V
Input Voltage
0
+5 REF
V
Voltage Protection
-0.1
5.1
V
150 mA max
Leakage Current
0
0.005
mA
@5 Volts
Bias Resistance, Rb
1
MΩ
Pull-down
Input Resistance, R
15
kΩ
Input Capacitance, C
100
nF
Time Constant
1.5
ms
= R x C
Resolution
10
(12)*
bit
Temp. compensated
Total Unadj. Error
±2
LSB
@polling freq of 200 Hz
Analog Input
Channel A
0 20 mA
Input Current
0
4 20
25
mA
@ 6 Volts
Bias Resistance, Rb
240
Pull-down
Input Resistance, R
15
kΩ
Input Capacitance, C
100
nF
Time Constant,
1.5
ms
= R x C
Resolution
10
(12)*
bit
Temp. compensated
Total Unadj. Error
±2
LSB
@polling freq of 200 Hz
Internal
Analog Inputs
Input Voltage
0
40
V
Max continuous voltage
Maximum input voltage
55
V
Time Constant
1.5
ms
= R x C
Resolution
10
bit
Temp. compensated
* Note 12 bits resolution for Ports 1 and 2
7.2. PWM Outputs (Analog Outputs)
There are 16 DIOP ports, all of which are capable of being configured as a PWM Outputs as shown
below. All of the PWMs are per default current regulated in hardware. The current regulation is
achieved by completing the circuit to PWM GND (pin 3 on all DIOP connectors). Although digital
in nature, the ports are considered to be Analog Outputs for the purposes of the CANopen interface,
which uses 16-bit values to represent the PWM Outputs, just as would for true Analog Outputs.
Note that there is only one PWM GND for each pair of PWM Outputs. Therefore, the PWM Outputs
must be used in opposing pairs if both outputs are to be used. i.e. “forwards/backwards”, “left
right” or “up/down” etc. In this way, the PWM GND is never used simultaneously by both PWM
Outputs in the pair. The pairs are matched on the same connector. Each of the pairs are split into
channels A and B.
The ports are protected against ESD, short circuit and current overload.