ES51970(6000counts)
DMM Analog front end with Inrush
2.11 Sleep
Set CS pin (pin 80) to logic low to make the ES51970 entering the sleep mode. The current
consumption will be less than 3uA typically. Set CS pin to logic high or kept floating, the
ES51970 will return to normal operation.
2.12 Multi-level battery voltage indication
The ES51970 is built-in a comparator for batter voltage indication. The voltage is applied to
LBAT pin (pin 89) vs. V- terminal. MPU could check the status bit BTS1/BTS0 and monitor
the LBAT voltage status.
Battery voltage
VLBT > Vt1
Vt2 < VLBT < Vt1
Vt3 < VLBT < Vt2
VLBT < Vt3
BTS1
BST0
1
1
0
0
1
0
1
0
Low battery configuration for 9V/1.5V*4/1.5V*3 battery
Low battery test circuit (a)
Low battery test circuit (b)
6V
9V
360K
BA
470K
BA
LBAT
LBAT
TT
0.1u
TT
0.1u
AGND
V-
AGND
V-
270K
180K
0V
0V
Low battery test circuit (c)
4.5V
360K
BA
LBAT
TT
0.1u
AGND
V-
470K
0V
ver. 2.8
23
12/01/12
CYRUSTEK [ Cyrustek corporation ]
