ICS1722
Table 8: Timing Characteristics
R
≈
16k
Ω
, C
≈
100pF
PARAMETER
Clock Frequency
Reset Pulse Duration
Charge Pulse Width
Discharge Pulse Width
Rest Time
Data Acquisition Time
Cycle Time
Capacitor Discharge Pulse Width
Capacitor Discharge Pulse Period
Polling Detect Pulse Width
Polling Detect Pulse Period
Soft Start Initial Pulse Width
Soft Start Incremental Pulse Width
Discharge Mode Pulse Width
Discharge Mode Pulse Period
RESET to SEL Dynamic Reprogram Period
SYMBOL
t
RESET
t
CHG
t
DCHG
t
R
t
DA
t
CYCLE
REFERENCE
see Figure B
see Figure A
see Figure A
see Figure A
see Figure A
see Figure A
t
RSA
see Figure B
TYP
1.0
700
1048
5.0
4.0
16.4
1077
5.0
100
100
624
200
7.0
400
1050
1160
UNITS
MHz
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
Timing Diagrams
Figure A:
t
CHG
CHG
DCHG
t
CYCLE
t
R
voltage
t
DCHG
t
R
t
DA
Figure B:
t
RE S E T
R ES E T
SEL0
SEL1
AU X 0
AU X 1
t
RS A
14
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