tc7109a Microchip Technology Inc., tc7109a Datasheet - Page 21

• Manufacturer Part Number: tc7109a
• Description: 12-bit ?-compatible Analog-to-digital Converters
• Manufacturer: Microchip Technology Inc.

FIGURE 4-7:
FIGURE 4-8:
© 2006 Microchip Technology Inc.
Analog In
+5V
GND
GND
+5V
+5V
+5V
+5V
10
11
25
26
39
40
20
1
4
5
6
7
9
TC7109A
MODE CE/
HBEN
T0
RESET
SS
INT
EA
WR
PSEN
ALE
PROG
V
T1
V
GND
DD
CC
XTAL1
2
LOAD
μPD8748H/49H
Microcomputer
RUN/HOLD
Handshake Interface for Multiplexed Converters
Connection Diagram
POL, OR
CMOS
B
SEND
LBEN
B
9
1
- B
- B
DB0 - DB7
P20 - P27
P14 - P17
12
XTAL2
TBRL DRR
8
3
6
8
P13
P12
P11
P10
RD
+5V
2
21-24,
35-38
31-34
30
29
28
27
12-19
8
Analog In
TBRE
8
5
6402 CMOS UART
8
Other I/O
RBR1 - RBR8
2
TC7109A
MODE CE/
HBEN
8-Bit Data Bus
GND
+5V
LOAD
6
8
RUN/HOLD
9-16
3
3-8
POL, OR
40
17
26
18
19
20
B
1
2
SEND
LBEN
B
9
GND
SFD
1
- B
V+
GND
TEST
RUN/HOLD
STATUS
LBEN
HBEN
B
POL, OR
B
CE/LOAD
- B
9
1
12
- B
- B
8
TBR1 - TBR8
TC7109A
12
8
6
8
Serial Output
,
BUFF OSC OUT
Serial Input
+5V
REF CAP+
REF CAP-
Analog In
OSC OUT
REF OUT
OSC SEL
REF IN+
REF IN-
OSC IN
MODE
SEND
HI LO
BUFF
COM
IN HI
INT
AZ
V-
39
38
37
36
35
34
33
32
31
30
29
28
27
25
24
23
22
21
TC7109A
MODE CE/
HBEN
-5V
GND
C
0.33μF
TC7109/A
AZ
1μF
0.01μF
3.58MHz
Crystal
LOAD
1MΩ
C
0.15μF
RUN/HOLD
10 k
INT
R
20k
POL, OR
INT
DS21456C-page 21
B
SEND
LBEN
B
9
Ω
Ω
1
- B
0.2 V
1 V
External
Reference
- B
12
+
+
–
–
Analog
GND
8
REF
Input
REF
6
8
+5V