IO Voltage Levels

Overview of the voltage limits and protection measures for the analog and digital IOs on HIL 4/6 Series hardware devices

HIL output stages are designed to minimize the possibility of accidentally damaging the IO stage, which is done at the price of the output driving capacity. For that reason, the output stages can only drive high impedance inputs.

When the simulation is not running, the analog and digital outputs are set to 0 as the default value.

Digital IO Voltage Levels

Table 1. HIL 402 and HIL 404 digital IO characteristics
Parameter Test condition Min Typ Max
Digital inputs
VIH High-level input voltage   2 V    
VIL Low-level input voltage       0.8 V
RIN Input resistance     10 kΩ  
Digital outputs
VOH High-level output voltage RLOAD= 1 MΩ 4.8 V    
VOL Low-level output voltage RLOAD= 1 MΩ     0.2 V
ROUT Output resistance     430 Ω  
Table 2. HIL 603 digital IO characteristics
Parameter Test condition Min Typ Max
Digital inputs
VIH High-level input voltage   2 V    
VIL Low-level input voltage       0.8 V
RIN Input resistance     100 kΩ*  
Digital outputs
VOH High-level output voltage RLOAD= 1 MΩ 4.8 V    
VOL Low-level output voltage RLOAD= 1 MΩ     0.2 V
ROUT Output resistance     1.4 kΩ  
Table 3. HIL 602+ and HIL 604 digital IO characteristics
Parameter Test condition Min Typ Max
Digital inputs
VIH High-level input voltage   2 V    
VIL Low-level input voltage       0.8 V
RIN Input resistance     10 kΩ  
Digital outputs
VOH High-level output voltage RLOAD= 1 MΩ 4.8 V    
VOL Low-level output voltage RLOAD= 1 MΩ     0.2 V
ROUT Output resistance     430 Ω  

Analog IO Voltage Levels

Table 4. HIL 402 and HIL 404 analog IO characteristics
Parameter Test condition Value Tolerance
Analog inputs
VAIH Input voltage range upper limit   10 V  
VAIL Input voltage range lower limit   -10 V  
RIN Input resistance   ~30 kΩ  
  Gain error   0.01%  
  Offset error   0.5 mV  
Analog outputs
VAOH Output voltage range upper limit RLOAD= 1 MΩ 10 V  
VAOL Output voltage range lower limit RLOAD= 1 MΩ -10 V  
ROUT Output resistance   ~0 Ω  
IOUT Maximum output current VOUT= 5 V 20 mA  
IOUT Maximum output current VOUT= 10 V 4.5 mA  
  Gain error   0.01%  
  Offset error   0.5 mV  
Table 5. HIL 603 analog IO characteristics
Parameter Test condition Value Tolerance
Analog inputs
VAIH Input voltage range upper limit   5 V 0.5%
VAIL Input voltage range lower limit   -5 V 0.5%
RIN Input resistance   20 kΩ 1%
Analog outputs
VAOH Output voltage range upper limit RLOAD= 1 MΩ 5 V 0.5%
VAOL Output voltage range lower limit RLOAD= 1 MΩ -5 V 0.5%
ROUT Output resistance   0 Ω -
Table 6. HIL 602+ and HIL 604 analog IO characteristics
Parameter Test condition Value Tolerance
Analog inputs
VAIH Input voltage range upper limit   10 V  
VAIL Input voltage range lower limit   -10 V  
RIN Input resistance   ~30 kΩ  
  Gain error   0.01%  
  Offset error   0.5 mV  
Analog outputs
VAOH Output voltage range upper limit RLOAD= 1 MΩ 10 V  
VAOL Output voltage range lower limit RLOAD= 1 MΩ -10 V  
ROUT Output resistance   0 Ω  
IOUT Maximum output current VOUT= 5 V 20 mA  
IOUT Maximum output current VOUT= 10 V 4.5 mA  
  Gain error   0.01%  
  Offset error   0.5 mV  

IO Protection

HIL series devices are protected against overvoltage conditions with the following protection limits:

Table 7. HIL input voltage tolerance
IO type Lower voltage limit Upper voltage limit
Digital input -24 V +24 V
Digital output -24 V +24 V
Analog input -24 V +24 V
Analog output -24 V +24 V