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| 型號： | TC7107ILW713 |
| 元件分類： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 31/34頁 |
| 文件大小： | 482K |
| 代理商： | TC7107ILW713 |
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TC7106/A/TC7107/A
DS21455D-page 6
2008 Microchip Technology Inc.
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)
Normal
Pin No.
(40-Pin PDIP)
(Reversed
Symbol
Description
1
(40)
V+
Positive supply voltage.
2
(39)
D1
Activates the D section of the units display.
3
(38)
C1
Activates the C section of the units display.
4
(37)
B1
Activates the B section of the units display.
5
(36)
A1
Activates the A section of the units display.
6
(35)
F1
Activates the F section of the units display.
7
(34)
G1
Activates the G section of the units display.
8
(33)
E1
Activates the E section of the units display.
9
(32)
D2
Activates the D section of the tens display.
10
(31)
C2
Activates the C section of the tens display.
11
(30)
B2
Activates the B section of the tens display.
12
(29)
A2
Activates the A section of the tens display.
13
(28)
F2
Activates the F section of the tens display.
14
(27)
E2
Activates the E section of the tens display.
15
(26)
D3
Activates the D section of the hundreds display.
16
(25)
B3
Activates the B section of the hundreds display.
17
(24)
F3
Activates the F section of the hundreds display.
18
(23)
E3
Activates the E section of the hundreds display.
19
(22)
AB4
Activates both halves of the 1 in the thousands display.
20
(21)
POL
Activates the negative polarity display.
21
(20)
BP/GND
LCD Backplane drive output (TC7106A). Digital Ground (TC7107A).
22
(19)
G3
Activates the G section of the hundreds display.
23
(18)
A3
Activates the A section of the hundreds display.
24
(17)
C3
Activates the C section of the hundreds display.
25
(16)
G2
Activates the G section of the tens display.
26
(15)
V-
Negative power supply voltage.
27
(14)
VINT
Integrator output. Connection point for integration capacitor. See INTEGRATING
CAPACITOR section for more details.
28
(13)
VBUFF
Integration resistor connection. Use a 47 k
Ω resistor for a 200 mV full scale range
and a 47 k
Ω resistor for 2V full scale range.
29
(12)
CAZ
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 Section 7.1
“Auto-Zero Capacitor (CAZ)” on Auto-Zero Capacitor for more details.
30
(11)
VIN-
The analog LOW input is connected to this pin.
31
(10)
VIN+
The analog HIGH input signal is connected to this pin.
32
(9)
ANALOG
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 8.3 “Analog Common (Pin
32)” on ANALOG COMMON for more details.
33
(8)
CREF-
See Pin 34.
34
(7)
CREF+
A 0.1 F 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 200 mV scale is
used, a 1 F capacitor is recommended and will hold the rollover error to 0.5 count.
35
(6)
VREF-
See Pin 36.
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