參數(shù)資料
型號(hào)： TC7117CPL
元件分類： ADC
英文描述： 1-CH 22-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 21/24頁
文件大?。?/td> 410K
代理商： TC7117CPL
TC7116/A/TC7117/A
DS21457C-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)
(40-Pin CERDIP)
Pin Number
(44-Pin PQFP)
Symbol
Description
1
8
HLDR
Hold pin, Logic 1 holds present display reading.
29
D1
Activates the D section of the units display.
310
C1
Activates the C section of the units display.
411
B1
Activates the B section of the units display.
512
A1
Activates the A section of the units display.
613
F1
Activates the F section of the units display.
714
G1
Activates the G section of the units display.
815
E1
Activates the E section of the units display.
916
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/
GND
LCD backplane drive output (TC7116/TC7116A). Digital ground
(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”, Integrating Capacitor for more
details.
28
36
VBUFF
Integration resistor connection. Use a 47k
Ω resistor for a 200mV full scale range
and a 470k
Ω resistor for 2V full scale range.
29
37
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 4.1 “Auto-Zero Capacitor”, 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 sup-
ply. It also acts as a reference voltage source. See Section 3.1.6 “Analog Com-
mon”, Analog Common for more details.
33
41
CREF-
See Pin 34.
相關(guān)PDF資料
PDF描述
TC7117ACLW713 1-CH 22-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC44
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