參數(shù)資料
型號(hào)： TC7117CPI
元件分類： ADC
英文描述： 1-CH DUAL-SLOPE ADC, PDIP40
封裝： PLASTIC, DIP-40
文件頁(yè)數(shù)： 29/32頁(yè)
文件大?。?/td> 515K
代理商： TC7117CPI
TC7106/A/TC7107/A
DS21455C-page 6
2006 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 47k
Ω resistor for a 200mV full scale range and
a 47k
Ω resistor for 2V full scale range.
29
(12)
CAZ
The size of the auto-zero capacitor influences system noise. Use a 0.47
μF capacitor
for 200mV full scale, and a 0.047
μF 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 opera-
tion 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 0.1μF 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 1
μF capacitor is recommended and will hold the rollover error to 0.5 count.
35
(6)
VREF-
See Pin 36.
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