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参数资料
| 型号： | TC835CPI |
| 元件分类： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 7/24页 |
| 文件大小： | 543K |
| 代理商： | TC835CPI |
2002 Microchip Technology Inc.
DS21478B-page 15
TC835
FIGURE 6-2:
RC OSCILLATOR CIRCUIT
FIGURE 6-3:
COMPARATOR CLOCK
CIRCUITS
FIGURE 6-4:
4-1/2 DIGIT ADC WITH MULTIPLEXED COMMON CATHODE LED DISPLAY
R2
R1
FO
Gates are 74C04
C
1. fO =
1
2C(0.41RP +0.7R1)
R1 R2
R1 +R2
a. If R1 =R2 =R1,F
0.55/RC
b. If R2 >> R1,f
0.45/R
1C
c. If R
2 << R1,f
0.72/R
1C
2. Examples:
a. f = 120kHz, C = 420pF
R1 =R2
≈ 10.9k
b. f = 120kHz, C = 420pF, R
2 = 50k
R
1 = 8.93k
c. f = 120kHz, C = 220pF, R
2 =5k
R1 = 27.3k
,RP =
+5V
VOUT
390pF
30k
7
8
2
3
16k
0.22
F
16k
4
1k
1
+5V
VOUT
2
3
1
4
7
6
R2
100k
R2
100k
R3
50k
C2
10pF
R4
2k
C1
0.1
F
-
+
LM311
-
+
LM311
56k
28
27
26
25
24
23
22
21
9
8
7
6
5
4
3
2
1
REF IN
ANALOG
GND
INT
OUT
AZ IN
BUFF
OUT
CREF+
+5V
–5V
UR
DGND
POLARITY
OR
STROBE
RUN/HOLD
CLK IN
BUSY
1
2
3
4
5
6
7
8
9
SET VREF = 1V
100
k
Analog
GND
0.33
F
100 k
1
F
1
F
47
k
150
+5V
150
10
11
12
13
14
15
16
17
18
+5V
MC14513
1
F
20
19
18
17
16
15
–INPUT
+INPUT
V+
D5 (MSD)
B1 (LSB)
B2
(LSD) D1
D2
D3
D4
B4
(MSB) B8
10
11
12
13
14
100
k
SIG
IN
+
–
0.1
F
+5V
FOSC = 200kHz
CREF-
V-
TC835
MCP1525
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