26 Current Bias Generator (CBG)
Note: This data sheet summarizes the features
of the dsPIC33CK512MPT608 family of devices. It is not
intended to be a comprehensive reference source. To complement the information in this data
sheet, refer to “Current Bias Generator (CBG)” (www.microchip.com/DS70005253) in the “dsPIC33/PIC24 Family Reference
Manual”.
The Current Bias Generator (CBG) consists of two classes of current sources: 10 μA and 50 μA sources. The major features of each current source are:
- 10 μA Current Sources:
- Current sourcing only
- Up to four independent sources
- 50 μA Current Sources:
- Selectable current sourcing or sinking
- Selectable current mirroring for sourcing and sinking
Package Type | ISRCx | IBIASx |
---|---|---|
100-Pin | 0,1,2,3 | 0,1,2,3 |
A simplified block diagram of the CBG module is shown in Figure 26-1.
Note:
- RESD is typically 350 Ohms.
- The ADC analog input is shown only for clarity. Each analog peripheral connected to the pin has a separate Electrostatic Discharge (ESD) resistor.