Datasheet

 2002-2012 Microchip Technology Inc. DS21456D-page 3
TC7109/A
Typical Application
Input
High
AZ
BUFF
C
AZ
INT
Buffer
Integrator
AZ
ZI
AZ
ZI
DE
(+)
AZ
INT
AZ
Comparator
Comp
Out
35
3130
C
REF
AZ
DE (±)
ZI
33
34
Common
Input Low
INT
37 36
REF
IN+
DE
(–)
DE
(–)
DE
(+)
R
INT
C
INT
3839
REF
CAP-
REF
CAP+
ZI
6.2V
10mA
28 40
V+
V-
29
REF
OUT
17 3 4 5 6 7 8 9 10 11 12 13 14
22622
23
24
25
21
To Analog
Section
Comp Out
AZ
INT
DE (±)
ZI
Conversion
Control Logic
Oscillator and
Clock Circuitry
Handshake
Logic
15 16
27
18
19
20
LBEN
HBEN
CE/LOAD
1
GND
14 Latches
12-Bit Counter
16 Three-State Outputs
Send
Mode
BUFF
OSC
OUT
OSC
SEL
OSC
OUT
OSC
IN
RUN/
HOLD
Status
POL OR TEST
High Order
Byte Inputs
Low Order
Byte Inputs
TC7109A
REF
IN-
B
12
B
11
B
10
B
9
B
8
B
7
B
6
B
5
B
4
B
3
B
2
B
1
Latch
Clock
32
+
+
–
–
+
–