TC835CBU Ver la hoja de datos (PDF) - TelCom Semiconductor Inc => Microchip
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TC835CBU Datasheet PDF : 12 Pages
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TC835
PERSONAL COMPUTER
DATA ACQUISITION A/D CONVERTER
SET VREF = 1V –5V
VREF IN
100 kΩ
1 V–
28
2
UNDERRANGE
REF IN
OVERRANGE 27
3 ANALOG
COMMON
STROBE 26
ANALOG GND
0.47
µF
1 µF
4
INT OUT
5
AZ IN
6
BUFF OUT
RUN/HOLD 25
24
DIGTAL GND
23
POLARITY
SIGNAL
INPUT
100 kΩ
100
kΩ
7
1 µF 8
9
CR– EF
CR+EF
–INPUT
22
CLOCK IN
BUSY 21
20
(LSD) D1
+5V
0.1 µF
10
11
+INPUT
V+
TC835
D2 19
D3 18
12 D5 (MSD)
D4 17
13 B1 (LSB)
14 B2
(MSB) B8 16
B4 15
CLOCK
INPUT
120 kHz
SW I
+ IN
ANALOG
INPUT BUFFER
+
RINT
SW
–
RI
SW
+
RI
–
REF
IN
SWR
CREF
SWIZ SWZ
SWZ
ANALOG
COM
SW
+
RI
SW R– I
SWZ
CINT
CSZ
–
+
INTEGRATOR
COMPARATOR
+
–
TO
DIGITAL
SECTION
SW I
– IN
SW1
SWITCH OPEN
SWITCH CLOSED
Figure 1. Test Circuit
V+
LOGIC
INPUT
BUFFER
Figure 2. Digital Logic Input
SW I
+ IN
SW
–
RI
SW
+
RI
REF
IN
SWR
CREF
SWZ
ANALOG
COM
SW
+
RI
SW
–
RI
ANALOG
INPUT BUFFER
+
RINT
–
SWIZ SWZ
SWZ
CINT
CSZ
–
+
INTEGRATOR
COMPARATOR
+
–
TO
DIGITAL
SECTION
SW I
– IN
SW1
3-68
Figure 3A. Analog Circuit Function Diagram
Figure 3B. System Zero Phase
SW I
+ IN
ANALOG
INPUT BUFFER
+
RINT
SW
–
RI
SW
+
RI
–
REF
IN
SWR
CREF
SWIZ SWZ
SWZ
ANALOG
COM
SW
+
RI
SW R– I
SWZ
CINT
CSZ
–
+
INTEGRATOR
COMPARATOR
+
–
TO
DIGITAL
SECTION
SW I
– IN
SW1
SWITCH OPEN
SWITCH CLOSED
Figure 3C. Input Signal Integration Phase
SW I
+ IN
ANALOG
INPUT BUFFER
+
RINT
SW
–
RI
SW
+
RI
–
REF
IN
SWR
CREF
SWIZ SWZ
SWZ
ANALOG
COM
SW
+
RI
SW R– I
SWZ
CINT
CSZ
–
+
INTEGRATOR
COMPARATOR
+
–
TO
DIGITAL
SECTION
SW I
– IN
SW1
SWITCH OPEN
SWITCH CLOSED
Figure 3D. Reference Voltage Integration Cycle
TELCOM SEMICONDUCTOR, INC.
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