ES5120
3 3/4 DIGIT A/D CONVERTER
Pin No. Pin No.
(40-pin (44-pin Flat Package) Package) Symbol Descrlption
12
7
BC1BT
LCD segment drive for"b"and"c"segments of LSD and "low
battery".
13
14
15
8
9
10
11
BP3
BP2
BP1
VDISP
LCD backplane #3.
LCD backplane #2.
LCD backplane #1.
Sets peak LCD drive signal : V
PEAK
=(V+)-VDISP may also be set to
compensate for temperature variation of LCD crystal threshold
voltage.(default: The VDISP pin is connected to DGND.)
16
12
DGND
Internal logic digital ground, the logic "O" level. Nominally 4.7V
below V＋
17
13
ANNUNC Square wave output at the backplane frequency, synchronized to
BP1 ANNUNC can be used to control display annunciators.
Connecting an LCD segment to ANNUNC turns it on; connecting it
to its backplane turns it off.
18
14
LOGIC
"Logic Mode" control input. When connected to V＋ the converter
is in logic mode. The LCD displays "OL" and the decimal point
inputs control the "high" and "low" annunciators. When the "low"
annunciator is on, the buzzer will also be on. When unconnected or
connected to DGND, the ES5120 is in the voltage frequency
measurement mode. This pin has a 5μA internal pulldown to
DGND.
CYRUSTEK [ Cyrustek corporation ]
