TC835CBU Ver la hoja de datos (PDF) - TelCom Semiconductor Inc => Microchip
Número de pieza
componentes Descripción
Fabricante
TC835CBU Datasheet PDF : 12 Pages
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PERSONAL COMPUTER
DATA ACQUISITION A/D CONVERTER
TYPICAL APPLICATIONS DIAGRAMS
4-1/2 Digit ADC With Multiplexed Common Anode LED Display +5V
1
TC835
2
20 19 18 17 12
D1 D2 D3 D4 D5
4
INT OUT
0.33µF
1 µF
5
AZ IN
6
100 kΩ
22
200 kHz
100 kΩ
+
ANALOG
INPUT
–
10
1 µF
9
BUFF
OUT
fIN
+INPUT
–INPUT
TC835
3 ANALOG
COMMON
POL 23
C–REF 7
C+REF 8
16
B8
15
B4 14
B2
B1 13
V–
REF
IN
V+
12
6.8 kΩ 11
4.7 kΩ
1 µF
–5V
100 kΩ
TC04
bc
BLANK MSD ON ZERO
6D
2
C
1
B
7A
7
7
7
7
X7
5 9–15
RBI
7447
16 +5V
RC Oscillator Circuit
R2
R1
C
fO
GATES ARE 74C04
1.
fO =
1
, RP =
2 C(0.41 RP + 0.7 R1)
R1 R2
R1 + R2
a. If R1 = R2 = R1, f ≅ 0.55/RC
b. If R2 >> R1, f ≅ 0.45/R1C
c. If R2 << R1, f ≅ 0.72/R1C
2. Examples:
a. f = 120 kHz, C = 420 pF
R1 = R2 ≈ 10.9 kΩ
b. f = 120 kHz, C = 420 pF, R2 = 50 kΩ
R1 = 8.93 kΩ
c. f = 120 kHz, C = 220 pF, R2 = 5 kΩ
R1 = 27.3 kΩ
Comparator Clock Circuits
+5V
0.22 µF
16 kΩ
16 kΩ
56 kΩ
2+ 8
LM311 7
3–
1
4
1 kΩ
VOUT
30 kΩ
390 pF
R2
100 kΩ
+5V R4
2 kΩ
R2
100 kΩ
C1
0.1 µF
2+ 6
LM311
3–
4
1
C2
10 pF
7
VOUT
R3
50 kΩ
3
4
5
6
7
8
TELCOM SEMICONDUCTOR, INC.
3-75
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