TC7116 Microchip, TC7116 Datasheet - Page 6

• Manufacturer Part Number: TC7116
• Description: 3-1/2 Digit Analog-to-Digital Converters with Hold
• Manufacturer: Microchip

TC7116/A/TC7117/A
DS21457B-page 6
2.0
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
(40-Pin CERDIP)
(40-Pin PDIP)
Pin Number
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
11
1
2
3
4
5
6
7
8
9
PIN DESCRIPTIONS
PIN FUNCTION TABLE
(44-Pin PQFP)
Pin Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
41
42
8
9
COMMON This pin is primarily used to set the Analog Common mode voltage for battery
Symbol
C
HLDR
V
C
GND
POL
V
V
AB
C
V
BP/
BUFF
REF
G
G
G
D
C
B
A
E
D
C
B
A
E
D
B
E
A
C
REF
F
F
F
V-
INT
IN
IN
AZ
1
1
1
1
1
1
2
2
2
2
2
2
3
3
3
3
3
3
1
3
2
+
4
-
+
-
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.
Activates the D section of the tens display.
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 Section 4.3, Integrating Capacitor for more details.
Integration resistor connection. Use a 47kΩ resistor for a 200mV full scale range
and a 470kΩ resistor for 2V full scale range.
The size of the auto-zero capacitor influences system noise. Use a 0.47µF
capacitor for 200mV full scale, and a 0.047µF capacitor for 2V full scale.
See Section 4.1, Auto-Zero Capacitor for more details.
The analog LOW input is connected to this pin.
The analog HIGH input signal is connected to this pin.
operation, or in systems where the input signal is referenced to the power supply.
It also acts as a reference voltage source. See Section 3.1.6, Analog Common
for more details.
See Pin 34.
A 0.1µF capacitor is used in most applications. If a large Common mode voltage
exists (for example, the V
used, a 1µF capacitor is recommended and will hold the rollover error to
0.5 count.
IN
- pin is not at analog common), and a 200mV scale is
Description
©
2002 Microchip Technology Inc.