TC14433 Datasheet, PDF (9/10 Pages) TelCom Semiconductor, Inc – 3-1/2 DIGIT A/D CONVERTERS

3-1/2 DIGIT A/D CONVERTERS
1
TC14433
TC14433A
470k 0.1µF 0.1µF
+5V _{VX INPUT}
27kΩ
TC04
100kΩ
R₁ R₁/C₁ C₁ C0₁ C0₂
V_X
CLK1
V_AG
CLK0
DU
OR
EOC
Q0
TC14433 ^Q1
V_REF
Q₂
300k
V_SS
+5V
VDD
V_EE
DS4 DS3 DS 2 DS1
A ^B1 a
B
b
C
c
D I4511B d
LT
e
LE
V_SS
f
VDD^g
RESISTOR
NETWORK
OR
INDIVIDUAL
RESISTOR*
R
R_DP
For V_REF = 2000V
V : 1.999V full scale
For V_REF = 200 mV
V : 199.9 mV full scale
(change 470k to R = 27k
and decimal point position)
Peak digit current for an eight
displayed is 7 times the segment
current.
*To increase segment current
capability add two 75491 ICs
between 14511B and Resistor
Network. The use of the 1413
as digit driver increases digit
current capability over the 75492.
**V can range between –2.8 and
–11V.
R_M
V_EE**
+5V
(MINUS)
MINUS
CONTROL
ALTERNATE OVERRANGE CIRCUIT
WITH SEPARATED LED
1/6 75492
OR
OR
1/7 1413
R_R
+5V
75492
OR
1413*
DIGIT DRIVERS
2
3
COMMON
CATHODE
LED DISPLAY
4
5
Figure 14. 3-1/2 Digit Voltmeter with Low Component Count Using Common Cathode Displays
6
7
TELCOM SEMICONDUCTOR, INC.
8
3-135