IDN-PID2145
Operating Characteristics
Temperature: -40 C to +85 C
Operating Voltage: +5V (4.80Vmin to 5.20Vmax)
Typical Supply Current: 50 mA
PID Controller Algorithm
When your application requires reaching a set point quickly with limited overshoot, PID control is an excellent solution. Idean’s PID algorithm incorporates proportional, integral (to eliminate steady-state errors) and derivative (to reduce overshoot and settling time) terms to rapidly reach the set point. Our algorithm responds to a set of previous inputs thus considering the trend of the feedback (input). This complete solution is embedded into a single controller and can be customized for your unique application.
Package Description
Package: DIP-28
Pin Description
PIN |
NAME |
DESCRIPTION |
1 |
Set_Point |
0 to +5V analog for defining the set point. |
2 |
Sensor |
0 to +5V analog input, provided by external sensor. |
3 |
DAC |
0 to +5V analog output, generated internally by the PID algorithm. |
4 |
PWM |
PWM digital output, generated internally by the PID algorithm. |
5 |
DIR |
Direction digital output, generated internally by the PID algorithm. |
14 |
VSS |
GND |
24 |
EN |
Digital input, which enables both the DAC and PWM outputs. |
25 |
ID_Mode |
Digital input, which sets pin ID to either Integral input (low) or Derivative input (high). |
26 |
P |
0 to +5V analog input, which is translated into the gain selected by the ID_Mode pin. |
27 |
P |
0 to +5V analog input, which is translated into Proportional gain. |
28 |
VDD |
+5 VDC |
PID Coefficient Tuning
The Proportional Gain is used to reduce the rise time or the time needed to reach the target set point from the current pressure, but will not eliminate steady-state error. This gain also increases the tendency for the controller to overshoot the target as the controller becomes more aggressive.
The Integral Gain has the effect of eliminating the steady-state error.
The Derivative Gain has the effect of increasing the stability of the system, reducing the overshoot, and improving the transient response.
Tips