Datasheet

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SBAS255C − JUNE 2004 − REVISED APRIL 2009
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10
S
A/D1A
VREF
Integrator A
Voltage Output
Configuration of
Integrator A
WaitConvert WaitConvertIntegrate
S
REF1
S
REF2
S
INTA
S
INTB
S
RESET
CONV
CLK
Wait
Reset
Wait
Reset
Figure 4. Basic Integration Timing Diagram (as shown in Figure 3)
To Converter
S
RESET
S
REF2
S
A/D
VREF
S
REF1
S
INT
IN
C
F
a) Reset Configuration
To Converter
S
RESET
S
REF2
S
A/D
VREF
S
REF1
S
INT
IN
C
F
c) Integrate Configuration
To Converter
S
RESET
S
REF2
S
A/D
VREF
S
REF1
S
INT
IN
C
F
d) Convert Configuration
To Converter
S
RESET
S
REF2
S
A/D
VREF
S
REF1
S
INT
IN
C
F
b) Wait Configuration
Figure 5. Diagrams for the Four Configurations of the Front End Integrators of the DDC114