Datasheet

FS98O22

Rev. 1.6 46/146

5.6. Chopper Operation Amplifier Input Control Signal

The OPAMP embedded in FS98O22 has a chopper function to cancel the inverting and non-inverting sides

voltage bias offsets. After the Chopper operation, OPAMP input voltage bias is removed. Users could setup the

S_CH1CK[1:0] to choose the Chopper Control Signal. (Please see Table 5-17, Table 5-18 and Table 5-19)

Table 5-17 CLK selection table

M1_CK

0 MCK

1 MCK/4

Table 5-18 MCK selection table

M3_CK M0_CK

MCK

X 0 ICK

0 1 ECK

1 1 ECK/2

Table 5-19 chopper control signal selection table

S_CH1CK [1] S_CH1CK [0] Chopper Control Signal

0 0 0

0 1 1

1 0 CLK/500

1 1 CLK/1000

FORTUNE'

Properties

For Reference Only