TC7126CPL Microchip Technology, TC7126CPL Datasheet - Page 7

• Manufacturer Part Number: TC7126CPL
• Description: IC ADC 3 1/2DGT LCD DVR 40-DIP
• Manufacturer: Microchip Technology

Specifications of TC7126CPL

• Display Type: LCD
• Configuration: 7 Segment
• Digits Or Characters: A/D 3.5 Digits
• Current - Supply: 55µA
• Voltage - Supply: 9V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.600", 15.24mm)
• Resolution (bits): 3.5bit
• Input Channel Type: Differential
• Data Interface: Parallel
• Supply Voltage Range - Analogue: 9V
• Supply Current: 55µA
• No. Of Pins: 40
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: DIP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: TC7126CPLR; TC7126CPLR

2.0
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
© 2006 Microchip Technology Inc.
(40-Pin PDIP)
Pin Number
Normal
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
1
2
3
4
5
6
7
8
9
PIN DESCRIPTIONS
PIN FUNCTION TABLE
(Reversed)
(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)
(13)
(12)
(10)
(11)
(9)
(8)
COMMON
ANALOG
Symbol
V
C
V
POL
V
AB
C
V
BUFF
BP
V+
D
C
B
A
G
E
D
C
B
A
E
D
B
E
G
A
C
G
REF
F
F
F
V-
IN
INT
IN
AZ
1
1
1
1
1
1
2
2
2
2
2
2
3
3
3
3
3
3
1
3
2
4
+
-
-
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.
LCD Backplane drive output (TC7106A). Digital Ground (TC7107A).
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 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 0.047μF capacitor may be used. The capacitor must have a low
dielectric constant to prevent rollover errors. See Section 6.3 “Integrating Capaci-
tor (CINT)”, Integrating Capacitor for additional details.
Integration resistor connection. Use a 180kΩ resistor for a 200mV full-scale range
and a 1.8MΩ resistor for a 2V full scale range.
The size of the auto-zero capacitor influences system noise. Use a 0.33μF capacitor
for 200mV full scale, and a 0.033μF capacitor for 2V full scale. See Section 6.1
“Auto-Zero Capacitor (CAZ)”, Auto-Zero Capacitor for additional details.
The analog LOW input is connected to this pin.
The analog HIGH input signal is connected to this pin.
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 7.3 “Analog Common (Pin 32)”,
Analog Common for additional details.
See Pin 34.
Description
TC7126/A
DS21458C-page 7