TC7116CPL(2002) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TC7116CPL Datasheet PDF : 22 Pages
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TC7116/A/TC7117/A
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
Pin Number
(40-Pin PDIP)
(40-Pin CERDIP)
Pin Number
(44-Pin PQFP)
Symbol
Description
1
8
HLDR Hold pin, Logic 1 holds present display reading.
2
9
D1
Activates the D section of the units display.
3
10
C1
Activates the C section of the units display.
4
11
B1
Activates the B section of the units display.
5
12
A1
Activates the A section of the units display.
6
13
F1
Activates the F section of the units display.
7
14
G1
Activates the G section of the units display.
8
15
E1
Activates the E section of the units display.
9
16
D2
Activates the D section of the tens display.
10
17
C2
Activates the C section of the tens display.
11
18
B2
Activates the B section of the tens display.
12
19
A2
Activates the A section of the tens display.
13
20
F2
Activates the F section of the tens display.
14
21
E2
Activates the E section of the tens display.
15
22
D3
Activates the D section of the hundreds display.
16
23
B3
Activates the B section of the hundreds display.
17
24
F3
Activates the F section of the hundreds display.
18
25
E3
Activates the E section of the hundreds display.
19
26
AB4 Activates both halves of the 1 in the thousands display.
20
27
POL Activates the negative polarity display.
21
28
BP/ LCD backplane drive output (TC7116/TC7116A). Digital ground
GND (TC7117/TC7117A).
22
29
G3
Activates the G section of the hundreds display.
23
30
A3
Activates the A section of the hundreds display.
24
31
C3
Activates the C section of the hundreds display.
25
32
G2
Activates the G section of the tens display.
26
34
V-
Negative power supply voltage.
27
35
VINT Integrator output. Connection point for integration capacitor.
See Section 4.3, Integrating Capacitor for more details.
28
36
VBUFF Integration resistor connection. Use a 47kΩ resistor for a 200mV full scale range
and a 470kΩ resistor for 2V full scale range.
29
37
CAZ 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.
30
38
VIN- The analog LOW input is connected to this pin.
31
39
VIN+ The analog HIGH input signal is connected to this pin.
32
40
COMMON This pin is primarily used to set the Analog Common mode voltage for battery
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.
33
41
CREF- See Pin 34.
34
42
CREF+ A 0.1µF capacitor is used in most applications. If a large Common mode voltage
exists (for example, the VIN- pin is not at analog common), and a 200mV scale is
used, a 1µF capacitor is recommended and will hold the rollover error to
0.5 count.
DS21457B-page 6
© 2002 Microchip Technology Inc.
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