TC7107RCPL Microchip Technology, TC7107RCPL Datasheet - Page 18
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TC7107RCPL
Manufacturer Part Number
TC7107RCPL
Description
IC ADC 3 1/2DGT LED DVR REV40DIP
Manufacturer
Microchip Technology
Datasheet
1.TC7107CPL.pdf
(26 pages)
Specifications of TC7107RCPL
Display Type
LED
Configuration
7 Segment
Digits Or Characters
A/D 3.5 Digits
Current - Supply
800µA
Voltage - Supply
5V
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 - Analog
5V
Supply Current
800µA
Digital Ic Case Style
DIP
No. Of Pins
40
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
Q834953
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TC7107RCPL
Manufacturer:
TEICOM
Quantity:
20 000
TC7106/A/TC7107/A
10.4
The true differential input and differential reference
make ratiometric reading possible. Typically in a ratio-
metric operation, an unknown resistance is measured,
with respect to a known standard resistance. No accu-
rately defined reference voltage is needed.
The unknown resistance is put in series with a known
standard and a current passed through the pair. The
voltage developed across the unknown is applied to the
input and the voltage across the known resistor is
applied to the reference input. If the unknown equals
the standard, the display will read 1000.
The displayed reading can be determined from the
following expression:
The display will over range for:
FIGURE 10-2:
FIGURE 10-3:
DS21455B-page 18
R
UNKNOWN
R
160kΩ
1N4148
Sensor
STANDARD
Displayed Reading
Ratiometric Resistance
Measurements
50kΩ
R
UNKNOWN
R
2
(
300kΩ
50kΩ
R
≥ 2 x R
1
LOW PARTS COUNT
RATIOMETRIC
RESISTANCE
MEASUREMENT
TEMPERATURE SENSOR
V
V
V
Analog
Common
V
IN
REF
IN
REF
TC7106A
+
300kΩ
-
)
+
-
=
STANDARD
V+
RUnknown
-------------------------------x1000
RS
V
V
V
V
Common
IN
IN
REF
REF
V+
tan
-
+
+
-
+
TC7106A
dard
V
FS
LCD Display
= 2V
9V
V-
FIGURE 10-4:
FIGURE 10-5:
0.7%/°C
TC7106A
PTC
5.6kΩ
1N914
To Pin 1
R
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
3
20kΩ
20kΩ
0.22µF
0.47µF
To Display
R
R
0.1µF
1
2
COEFFICIENT RESISTOR
TEMPERATURE SENSOR
TC7106A, USING THE
INTERNAL REFERENCE:
200mV FULL SCALE, 3
READINGS-PER-SECOND
(RPS)
POSITIVE TEMPERATURE
©
To Backplane
100kΩ
100pF
2002 Microchip Technology Inc.
160kΩ
Set V
1kΩ
47kΩ
REF
0.01µF
V
V
V
V
Common
V+
IN
IN
REF
REF
= 100mV
TC7106A
-
+
22kΩ
1MΩ
+
-
+
+
–
9V
9V
V-
+
–
IN