TC7136 View Datasheet(PDF) - TelCom Semiconductor Inc => Microchip
Part Name
Description
Manufacturer
TC7136 Datasheet PDF : 12 Pages
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TC7136
TC7136A
TC7136/A PIN DESCRIPTION
Pin No.
40-Pin PDIP
Normal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
(Reverse)
(40)
(39)
(38)
(37)
(36)
(35)
(34)
(33)
(32)
(31)
(30)
(29)
(28)
(27)
(26)
(25)
(24)
(23)
(22)
(21)
(20)
(19)
(18)
(17)
(16)
(15)
(14)
Name
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
BP
G3
A3
C3
G2
V–
VINT
28
(13)
29
(12)
VBUFF
CAZ
30
(11)
VIN–
31
(10)
VIN+
32
(9)
ANALOG
COMMON
LOW POWER, 3-1/2 DIGIT
ANALOG-TO-DIGITAL CONVERTERS
Description
Positive supply voltage.
Activates the D section of the units display.
Activates the C section of the units display.
Activates the B section of the units display.
Activates the A section of the units display.
Activates the F section of the units display.
Activates the G section of the units display.
Activates the E section of the units display.
Activates the D section of the tens display.
Activates the C section of the tens display.
Activates the B section of the tens display.
Activates the A section of the tens display
Activates the F section of the tens display.
Activates the E section of the tens display.
Activates the D section of the hundreds display.
Activates the B section of the hundreds display.
Activates the F section of the hundreds display.
Activates the E section of the hundreds display.
Activates both halves of the 1 in the thousands display.
Activates the negative polarity display.
Backplane drive output.
Activates the G section of the hundreds display.
Activates the A section of the hundreds display.
Activates the C section of the hundreds display.
Activates the G section of the tens display.
Negative power supply voltage.
The integrating capacitor should be selected to give the maximum voltage
swing that ensures component tolerance build-up 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 µF capacitor may be used.
The capacitor must have a low dielectric constant to prevent roll-over errors.
See Integrating Capacitor section for additional details.
Integration resistor connection. Use a 180 kΩ for a 200 mV full-scale range
and a 1.8 MΩ for 2V full-scale range.
The size of the auto-zero capacitor influences the system noise. Use a 0.47 µF
capacitor for a 200 mV full scale, and a 0.1 µF capacitor for a 2V full scale. See
paragraph on Auto-Zero Capacitor for more details.
The low input signal is connected to this pin.
The high input signal is connected to this pin.
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.
3-250
TELCOM SEMICONDUCTOR, INC.
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