Datasheet
ADP8860
Rev. 0 | Page 25 of 52
• The ADP8860 has an integrated noise filter on the nRST
pin. Under normal conditions, it is not necessary to filter
the reset line. However, if exposed to an unusually noisy
signal, then it is beneficial to add a small RC filter or
bypass capacitor on this pin. If the nRST pin is not used, it must
be pulled well above the V
IH(MIN)
level (see Table 1). Do not allow
the nRST pin to float.
EXAMPLE CIRCUITS
V
07967-028
D3
D1
E3
D2
E4
D3
D4
D4
C4
D5
B4
D6
B3
D7
C3
CMP_IN
V
OUT
OPTIONAL
PHOTOSENSOR
PHOTOSENSOR
ALS
0.1µF
0.1µF
E1
VDDIO
nRST
C2
VDDIO
SDA
E2
VDDIO
SCL
D2
VDDIO
nINT
A3
V
IN
1µF
A4
GND1
D1
GND2
B1
C2+
B2
C2–
C2
1µF
A1
C1+
C1
C1–
C1
1µF
V
OUT
1µF
A2
ADP8860
Figure 44. Generic Application Schematic
KEYPAD LIGHT
UP TO 10 LEDs (6mA EACH)
60mA MAX TOTAL CURRENT
ACCESSORY
LIGHTS OR
SUB-DISPLAY BL
PH1
MAIN
PHOTOSENSOR
PH2
OPTIONAL
PHOTOSENSOR
0
7967-029
D3
D1
DL1
E3
D2
DL2
E4
D3
DL3
D4
D4
DL4
C4
D5
DL5
B4
D6/
CMP_IN2
DL6
B3
D7
C3
CMP_IN
E1
R1 R2 R3 R4
VDDIO
C2
SDA
E2
SCL
D2
B1
C2+
B2
C2–
A1
C1+
VOUT
GND2
C1
C1–
ADP8860
VIN
GND1
A3
A4
V
IN
A2
D1
DISPLAY BACKLIGHT
DL7
R5
DL8
R6
DL17
R15
2.8V
nRST
nINT
nRST
nINT
0.1µF
0.1µF
C2
1µF
C1
1µF
1µF
1µF
I
2
C
CONTROL
SIGNALS
Figure 45. Application Schematic with Keypad Light Control