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參數(shù)資料
| 型號： | TC815CBUTR |
| 元件分類： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, PQFP64 |
| 封裝： | PLASTIC, QFP-64 |
| 文件頁數(shù)： | 11/26頁 |
| 文件大?。?/td> | 575K |
| 代理商： | TC815CBUTR |
2005 Microchip Technology Inc.
DS21474C-page 19
TC815
TABLE 9-1:
10.0
EXTERNAL CRYSTAL
The TC815 is designed to operate with a 32,768Hz
crystal. This frequency is internally divided by two to
give a 61.04sec clock period. One conversion takes
8000 clock periods or 488.3 msec (
≈ 2 conversions/
second). Integration time is 1638.5 clock periods or
100msec.
The 32kHz quartz crystal is readily available and inex-
pensive. The 32kHz crystal is commonly used in digital
clocks and counters.
Several crystal sources exist. A partial listing is:
Statek Corporation
512 N. Main
Orange, CA 92668
(714) 639-7810
TWX: 910-593-1355
TELEX: 67-8394
Fox Electronics
5570 Enterprise Parkway
Fort Myers, FL 33905
(941) 693-0099
Contact manufacturer for full specifications.
PAD
BP1
BP2
BP3
PAD
COM1
COM2
COM3
1
BP1
/
19
/
2
/
BP2
/
20
/
3
/
BP3
21
/
4
/
LO
Ω
A
22
/
5
/
W
V
23
/
6
HOLD
k
m
24
/
7
b1
c1
/
25
/
8
a1
g1
d1
26
/
9
f1
e1
/
27
/
10
b2
c2
P2
28
/
11
a2
g2
d2
29
/
12
f2
e2
/
30
/
13
b3
c3
P3
31
/
14
a3
g3
d3
32
/
15
f3
e3
/
33
/
16
b4
c4
P4
34
/
17
AC
Auto
35
/
18
–MEM
/
36
/
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