參數(shù)資料
型號(hào)： TC7136CPL
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)： 10/15頁(yè)
文件大?。?/td> 134K
代理商： TC7136CPL
4
TC7136
TC7136A
Low Power 3-1/2 Digit Analog-To-
Digital Converters
TC7136-6
10/18/96
2001 Microchip Technology Inc.
DS21461A
COMMON
TC7136/A PIN DESCRIPTION
Pin No.
40-Pin PDIP
Normal
(Reverse)
Name
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
Backplane drive output.
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
The integrating capacitor should be selected to give the maximum voltage
swing that ensures component tolerance buildup will not allow the integrator
output to saturate. When analog common is used as a reference and the
conversion rate is 3 readings per second, a 0.047
F capacitor may be used.
The capacitor must have a low dielectric constant to prevent roll-over errors.
See Integrating Capacitor section for additional details.
28
(13)
VBUFF
Integration resistor connection. Use a 180k
for a 20 mV full-scale range and
a 1.8M
for 2V full-scale range.
29
(12)
CAZ
The size of the auto-zero capacitor influences the system noise. Use a 0.47
F
capacitor for a 200mV full scale, and a 0.1
F capacitor for a 2V full scale. See
paragraph on Auto-Zero Capacitor for more details.
30
(11)
VIN
–
The low input signal is connected to this pin.
31
(10)
VIN
+
The high input signal is connected to this pin.
32
(9)
ANALOG
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. See paragraph on Analog Common for more details. It also acts as a
reference voltage source.
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