TC7106
TC7106A
TC7107
TC7107A
3-190
TYPICAL SEGMENT OUTPUT
+
V
0.5mA
SEGMENT
OUTPUT
2mA
LCD DISPLAY
TC7106A
INTERNAL DIGITAL GROUND
BACKPLANE
21
+
C REF
+
VREF
34
36
CREF
–
VREF
35
RINT
–
C REF V BUFF
33
28
V
+
1
CAZ
CINT
VINT
LCD SEGMENT DRIVERS
Figure 3. TC7106A Block Diagram
29
INTEGRATOR
27
TO
DIGITAL
SECTION
7 SEGMENT
DECODE
7 SEGMENT
DECODE
7 SEGMENT
DECODE
÷
200
–
10
µA
31
INT
A/Z
ANALOG
COMMON
–
V IN
32
30
INT
DE (+)
DE (–)
DE
(–)
DE
(+)
–
+
V+– 3.0V
LOW
TEMPCO
VREF
A/Z
A/Z
+
–
+
+
–
DATA LATCH
A/Z
+
V IN
COMPARATOR
THOUSANDS
HUNDREDS
TENS
UNITS
TO SWITCH DRIVERS
FROM COMPARATOR OUTPUT
CLOCK
fOSC
1
÷4
6.2V
37
V+
3-1/2 DIGIT A/D CONVERTERS
AZ & DE (±)
26
–
V
40
OSC 1
39
OSC 2
ROSC
38
OSC 3
COSC
CONTROL LOGIC
INTERNAL DIGITAL GOUND
VTH
= 1V
500
Ω
26
TEST
TELCOM SEMICONDUCTOR, INC.
V–
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
