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ICM7216B, ICM7216D
Timing Diagram
40ms
INTERNAL
STORE
30ms TO 40ms
INTERNAL
RESET
60ms
FUNCTION:
TIME INTERVAL
40ms
UPDATE
190ms TO 200ms
PRIMING
MEASUREMENT INTERVAL
UPDATE
MEASUREMENT
IN PROGRESS
(INTERNAL ON
7216B)
INPUT A
PRIMING EDGES
INPUT B
250ns MIN
MEASURED
INTERVAL
NOTE:
(FIRST)
MEASURED
INTERVAL
(LAST)
5. If range is set to 1 event, first and last measured interval will coincide.
FIGURE 1. WAVEFORMS FOR TIME INTERVAL MEASUREMENT (OTHERS ARE SIMILAR, BUT WITHOUT PRIMING PHASE)
Typical Performance Curves
20
f A (MAX) FREQUENCY UNIT COUNTER,
FREQUENCY RATIO MODES
30
4.5 ≤ V DD ≤ 6V
-20 o C
25 o C
15
20
85 o C
10
5
T A = 25 o C
f A (MAX) f B (MAX) PERIOD,
TIME INTERVAL MODES
10
0
3
4
5
6
0
0
1
2
3
V DD -V SS (V)
FIGURE 2. f A (MAX), f B (MAX) AS A FUNCTION OF SUPPLY
6
V DD -V OUT (V)
FIGURE 3. TYPICAL I SEG vs V DD -V OUT
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