ES5120
3 3/4 DIGIT A/D CONVERTER
Pin No. Pin No.
(40-pin (44-pin Flat
Package) Package) Symbol Descrlption
Dual-purpose input.In voltage mode:When connected to V＋; the
19
15 RANGE/
FREQ
FREQ integration time will be 200 counts instead of 2000
counts,and the LCD will display the analog input divided by 10. In
frequency mode, this pin is the frequency input. A digital signal
applied to this pin will be measured with a one second timebase.
There is an internal 5μA pulldown to DGND.
20
16
DP0/LO Dual-purpose input. Decimal Point select input for voltage
measurements. In logic mode, connecting this pin to V＋ will turn
on "low" LCD segment. There is an internal 5μA pulldown to
DGND in volts mode only. Decimal point logic:
DP1 DP0 Decimal Point Selected
0
0
1
1
0
1
0
1
None
DP1
DP2
Dp3
21
22
17
DP1/HI
Dual-purpose input. Decimal Point select input for voltage
measurements. In logic mode, connecting this pin to V＋ will turn
on the "high" LCD segment. There is an internal 5μA pulldown to
DGND in volts mode only.
18 BUZOUT Buzzer output. Audio frequency, 2.5K or 5.0K for choice
determined by chip bonding, output which drives a piezo buzzer.
CYRUSTEK [ Cyrustek corporation ]
