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TC835 Datasheet(PDF) 4 Page - TelCom Semiconductor, Inc

Part # TC835
Description  PERSONAL COMPUTER DATA ACQUISITION A/D CONVERTER
PDF  12 Pages
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Manufacturer  TELCOM [TelCom Semiconductor, Inc]
Direct Link  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC835 Datasheet(HTML) 4 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
+
–
+ IN
IN
REF
ANALOG
COM
– IN
SWI
SWR
SWZ
SWI
SW1
SWZ
SWIZ
SWZ
INTEGRATOR
SWITCH CLOSED
SWITCH OPEN
SW RI
+
SWRI
–
COMPARATOR
TO
DIGITAL
SECTION
SW RI
+
SWRI
–
ANALOG
INPUT BUFFER
RINT
CINT
CREF
CSZ
+
–
+ IN
IN
REF
ANALOG
COM
– IN
SWI
SWR
SWZ
SWI
SW1
SWZ
SWIZ
SWZ
INTEGRATOR
SWITCH CLOSED
SWITCH OPEN
SW RI
+
SWRI
–
COMPARATOR
TO
DIGITAL
SECTION
SW RI
+
SWRI
–
ANALOG
INPUT BUFFER
RINT
CINT
CREF
CSZ
+
–
+ IN
IN
REF
ANALOG
COM
– IN
SWI
SWR
SWZ
SWI
SW1
SWZ
SWIZ
SWZ
INTEGRATOR
ANALOG
INPUT BUFFER
SW RI
+
SWRI
–
COMPARATOR
TO
DIGITAL
SECTION
SW RI
+
SWRI
–
RINT
CINT
CREF
CSZ
Figure 3A. Analog Circuit Function Diagram
Figure 1. Test Circuit
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28
27
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15
100 k
Ω
ANALOG GND
100
k
Ω
SIGNAL
INPUT
0.1 µF
SET VREF = 1V
V –
REF IN
ANALOG
COMMON
INT OUT
AZ IN
BUFF OUT
CREF
CREF
–INPUT
+INPUT
D5 (MSD)
B1 (LSB)
B2
V
+
UNDERRANGE
OVERRANGE
STROBE
RUN/HOLD
DIGTAL GND
POLARITY
CLOCK IN
BUSY
(LSD) D1
D2
D4
(MSB) B8
B4
D3
+5V
1 µF
100 k
Ω
1 µF
0.47
µF
VREF IN
CLOCK
INPUT
120 kHz
–5V
+
–
TC835
BUFFER
LOGIC
INPUT
V
+
Figure 3D. Reference Voltage Integration Cycle
+
–
+ IN
IN
REF
ANALOG
COM
– IN
SWI
SWR
SWZ
SWI
SW1
SWZ
SWIZ
SWZ
INTEGRATOR
SWITCH CLOSED
SWITCH OPEN
SW RI
+
SWRI
–
COMPARATOR
TO
DIGITAL
SECTION
SW RI
+
SWRI
–
ANALOG
INPUT BUFFER
RINT
CINT
CREF
CSZ
Figure 2. Digital Logic Input
Figure 3C. Input Signal Integration Phase
Figure 3B. System Zero Phase
PERSONAL COMPUTER
DATA ACQUISITION A/D CONVERTER
TC835



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