ETAS ES5340.2, Руководство пользователя

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ES5340.2 Electric Drive Simulation Board -User’s Guide 32
Hardware Description ETAS
3.1 Generating Analog Signals
These outputs are used for different analog signals via an output multiplexer.
The ES5340.2-M has eight analog outputs , two of which are dedicated to
simulating the analog speed sensor/resolver. The other six analog outputs can be
used to simulate additional analog speed sensors or to output analog signals.
The ES5340.1-S has six analog outputs (no simulation of speed sensors possi-
ble).
3.1.1 Specification
The output voltage range is -10 V to +10 V for internal reference or -12 V to
+12 V for external reference voltage – the resolution of the D/A converter is
16 bits.
All outputs are electrically insulated and have an electric strength of ±60 V.
In addition, each output has a cutoff relay.
The accuracy (internal reference) is ±5 mV, while the maximum current of an
output is ±30 mA.
The following illustration shows the schematic circuit diagram of an output.
Fig. 3-1 Schematic circuit diagram of the analog outputs
For each of the six channels CH0 to CH5, you can choose between the internal
(10 V) and the external source for the reference voltage (in LABCAR-RTC:
"ES5340-Analog-Out-Mux" device, "Signals" tab, "Reference Voltage"
column).
Only the same external reference can be assigned to the two channels reserved
for the simulation of the analog resolver speed sensor, CH6 and CH7. In this
case, the external reference can be connected to two pins: one for GND and one
for the signal of the external reference (see "Assignment of the connectors for
the inputs" on page 100) .
REF
IN
OUT = IN x REF
OUT
FPGA
External
Reference
Galv. Iso.
10 V Ref
Galv. Iso.
DAC
ECU
ADC
Sensor Supply
Voltage