TC7117 TelCom, TC7117 Datasheet - Page 5

• Manufacturer Part Number: TC7117
• Description: 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS WITH HOLD
• Manufacturer: TelCom

3-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTERS WITH HOLD
PIN DESCRIPTION
40-PinCerDIP
40-Pin PDIP/
Pin Number
Normal
TELCOM SEMICONDUCTOR, INC.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
39
1
2
3
4
5
6
7
8
Flat Package
Plastic Quad
Pin Number
44-Pin
10
11
12
13
14
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
8
9
9
COMMON
Symbol
HLDR
V
GND
POL
V
AB
C
V
V
BP
BUFF
D
C
B
A
G
E
16
C
B
A
E
D
B
E
G
A
C
G
V
F
F
F
INT
AZ
+
IN
–
1
2
3
IN
1
1
1
1
1
1
2
2
2
2
3
3
3
3
3
3
2
–
4
Description
Hold pin, Logic 1 holds present display reading.
Activates the D section of the units display.
Activates the C section of the units display.
Activates the B section of the units display.
Activates the A section of the units display.
Activates the F section of the units display.
Activates the G section of the units display.
Activates the E section of the units display.
D
Activates the C section of the tens display.
Activates the B section of the tens display.
Activates the A section of the tens display.
Activates the F section of the tens display.
Activates the E section of the tens display.
Activates the D section of the hundreds display.
Activates the B section of the hundreds display.
Activates the F section of the hundreds display.
Activates the E section of the hundreds display.
Activates both halves of the 1 in the thousands display.
Activates the negative polarity display.
LCD backplane drive output (TC7116/TC7116A).
Digital ground (TC7117/TC7117A).
Activates the G section of the hundreds display.
Activates the A section of the hundreds display.
Activates the C section of the hundreds display.
Activates the G section of the tens display.
Negative power supply voltage.
Integrator output. Connection point for integration
capacitor. See Integration Capacitor section for
additional details.
Integration resistor connection. Use a 47 k resis tor for
200 mV full-scale range and a 470 k resistor for 2V
full-scale range.
The size of the auto-zero capacitor influences system
noise. Use a 0.47 F capacitor for 200 mV full scale and
a 0.047 F capacitor for 2V full scale. See Auto-Zero
Capacitor paragraph for more details.
The analog LOW input is connected to this pin.
The analog HIGH input is connected to this pin.
This pin is primarily used to set the analog common-
mode COMMON voltage for battery operation or in
systems where the input signal is referenced to the
power supply. See Analog Common paragraph for more
details. It also acts as a reference voltage source.
2
Activates the D section of the tens display.
TC7116A
TC7117A
TC7116
TC7117
3-207
1
2
3
4
5
6
7
8