ES51945(5000counts)
Dual Display/No Cap
The ºC & ºF readings are shown on the dual-display LCD simultaneously. In
temperature2 measurement mode, the default range is 5000 ºC or 9032 ºF manual range. In
temperature1 measurement mode, the default range is 500.0/5000 ºC or 932.0/9032 ºF auto
range. The TSEL pin (pin104) is pulled to V-, the temperature1 measurement mode will be
set to 500.0 ºC manual mode.
Range
Temp1
Temp2
Full scale range
Auto 500.0℃ / 5000℃
Manual 5000℃
Input terminal
ADP V.S. SGND (50mV/500mV)
ADP V.S. SGND (500mV)
2.10 Multi-level low battery voltage detection
ES51945 provides a voltage detection input (pin 121: LBAT9) for multi-level low battery
application. There are two internal voltage reference Vt1 & Vt2 for comparing with LBAT9.
If LBAT9 is larger than Vt1, the LCD segment of SLB3 – SLB1 will active always. This
status implies Full battery. When LBAT9 is less than Vt1 but larger than Vt2, the LCD
segment of SLB3 will disappear and this status implies Half battery. When LBAT9 is less
than Vt2, the LCD segment of SLB2 will disappear and this status implies Low battery.
When the Low battery status lasts for 10 seconds, the LCD segment of SLB1 will be
blinking. When the SLB1 is blinking for 20 seconds, the operation of meter will be
inhibited and LCD panel will show “ Lo.bt”. In this case, it is suggested to replace a new
battery immediately. After “Lo.bt” appears and lasts for 60 seconds, ES51945 will enter to
auto power off mode.
Low battery condition > 30s
Operation not allowed
Full battery
Half battery
Low battery
blinking
AUTO
DC
AUTO
DC
AUTO
DC
AUTO
DC
1.8 0 0 V 1.8 0 0
1.8 0 0
L o.b t
V
V
Low battery test circuit (a)
Low battery test circuit (b)
3V
9V
150K
BA
910K
BA
LBAT9
LBAT9
TT
0.1u
TT
0.1u
AGND
V-
AGND
V-
470K
300K
0V
0V
v2.3
15
10/06/25
CYRUSTEK [ Cyrustek corporation ]
