TC7117 TelCom, TC7117 Datasheet - Page 6

• Manufacturer Part Number: TC7117
• Description: 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS WITH HOLD
• Manufacturer: TelCom

PIN DESCRIPTION (Cont.)
40-Pin CerDIP
3-208
TC7116
TC7116A
TC7117
TC7117A
Pin Number
40-Pin PDIP
Normal
33
34
35
36
37
38
39
40
Flat Package
Plastic Quad
Pin Number
44-Pin
41
42
43
44
3
4
6
7
Symbol
OSC
OSC
OSC
C
TEST
V
C
V
+
+
–
REF
REF
REF
+
3
2
1
Description
See pin 34.
A 0.1 F capacitor is used in most applications. If a
large, common-mode voltage exists (e.g., the V
not at analog common), and a 200 mV scale is used, a 1
error to 0.5 count.
Positive power supply voltage.
The analog input required to generate a full-scale output
(1999 counts). Place 100 mV between pins 32 and 36
for 199.9 mV full scale. Place 1V between pins 32 and
36 for 2V full scale. See paragraph on Reference
Voltage.
Lamp test. When pulled HIGH (to V
be turned on and the display should read –1888. It may
also be used as a negative supply for externally-
generated decimal points. See Test paragraph for more
details.
See pin 40.
See pin 40.
Pins 40, 39 and 38 make up the oscillator section. For
a 48 kHz clock (3 readings per sec), connect pin 40 to
the junction of a 100 k resistor and a 100 pF capacitor.
The 100 k
capacitor is tied to pin 38.
3-1/2 DIGIT ANALOG-TO-DIGITAL
F capacitor is recommended and will hold the roll-over
CONVERTERS WITH HOLD
resistor is tied to pin 39 and the 100 pF
TELCOM SEMICONDUCTOR, INC.
+
), all segments will
IN
–
pin is