TC500 Datasheet, PDF (15/17 Pages) TelCom Semiconductor, Inc – PRECISION ANALOG FRONT ENDS

PRECISION ANALOG FRONT ENDS
1 ^TC500
TC500A
TC510
TC514
TC05
CINT
1µF ^0.33µF
CAZ
0.22µF
+5V
10k
RINT
100k
10k
CREF
0.22µF
1 _VO–UT
2
C_INT
3
C_AZ
4
BUF
5 _ACOM
6 _CR–EF
7 ^CR+ EF
10k
C1, .01µF
9
V
+
REF
8 _VR–EF
CAP^{– 28}
DGND ²⁷
CAP^{+ 26}
25
V_DD
A0 ²²
A1 ¹⁹
CMPTR ²³
A ²²
B ²¹
TC514
CH1+ ¹⁸
CH1– ¹³
CH2+ 17
CH2– ¹²
CH3+ ¹⁶
CH3– ¹¹
CH4+ 15
CH4– 10
1µF
+5V
+5V
ANALOG
MUX LOGIC
MICRO
CONTROLLER
INPUT 1+
INPUT 1–
INPUT 2+
INPUT 2–
INPUT 3+
INPUT 3–
INPUT4+
INPUT4–
TYPICAL WAVEFORMS
PIN 2
VI+N
PIN 23
VI–N ^{PIN 2}
PIN 23
Figure 10. TC514 Design Example (See "Design Example")
+5V
+
INPUT 1
–
+
INPUT 2
–
+
INPUT 3
–
+
INPUT 4
–
ANALOG MUX
CONTROL LOGIC
IBM
PRINTER PORT
2
PORT
0378
3
HEX
10
25
18 _{CH1+ VDD}
13 _CH1–
1
V_O–UT
17 _CH2+
12 _CH2–
16 _CH3+
11 _CH3–
15 _CH4+
10 CH4–
TC514
20 _A0
19 _A1
22
A
21
B
23 _CMPTR
28
CAP –
26
CAP+
C_R+EF ⁷
C_R–EF 6
V_R+EF 9
V_R–EF 8
1µF
1µF
0.22µF
10k
10k
0.01µF
BUF ^{4 100kΩ}
C_AZ
C_INT
3
0.22µF
2
0.33µF
10kΩ
TC04
DGND
27
5
ACOM
Figure 11. TC514 to IBM Compatible Printer Port
TELCOM SEMICONDUCTOR, INC.
2
3
4
5
6
7
8
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