User manual

TMCM-1141 Hardware Manual (Rev. 1.02 / 2012-JUL-27) 12
www.trinamic.com
3.2.2.2 Analog Input AIN_1
The eight pin connector of the TMCM-1141 provides one dedicated analog input AIN_1.
This dedicated analog input offers a full scale input range of 0… +10V with a resolution of the internal
analog-to-digital converter of the microcontroller of 12 bit (0… 4095).
The input is protected against higher voltages up-to +24 V using voltage resistor dividers together with
limiting diodes against voltages below 0 V (GND) and above +3.3 V DC (see figure below).
+3.3V
AIN_1
ADC input
(microcontroller)
22k
10k
10nF
GND
GND GND
Figure 3.6 General purpose inputs (simplified input circuit)
3.2.2.3 Outputs OUT_0, OUT_1
The eight pin connector of the TMCM-1141 offers two general purpose outputs OUT_0 and OUT_1. These
two outputs are open-drain outputs and can sink up to 100 mA each. The outputs of the N-channel
MOSFET transistors are connected to freewheeling diodes each for protection against voltage spikes
especially from inductive loads (relais etc.) above supply voltage (see figure below).
Using free-wheeling diodes connected to VDD supply voltage:
None of the two outputs should be connected to any voltage above supply voltage of the module.
VDD
OUT_0,
OUT_1
microcontroller
GND
Figure 3.7 General purpose outputs