AD7280AWBSTZ Analog Devices Inc, AD7280AWBSTZ Datasheet - Page 18

• Manufacturer Part Number: AD7280AWBSTZ
• Description: IC BATT MON LI-ION AUTO 48LQFP
• Manufacturer: Analog Devices Inc
• Series: -r

Specifications of AD7280AWBSTZ

• Function: Battery Monitor, Over/Under Voltage Protection
• Battery Chemistry: Lithium-Ion (Li-Ion)
• Voltage - Supply: 8 V ~ 30 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AD7280A
100nF
100nF
100nF
V
DD
FERRITE
(n – 1)
V
7
DD
0
10µF
10µF
10µF
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
100nF
V
V
V
V
DD
DD
DD
SS
VIN6
VIN5
VIN4
VIN3
VIN2
VIN1
VIN0
VIN6
VIN5
VIN4
VIN3
VIN2
VIN1
VIN0
VIN6
VIN5
VIN4
VIN3
VIN2
VIN1
VIN0
n
1
0
0
3
2
10kΩ
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
Figure 29. AD7280A Daisy-Chain Configuration
0.1µF
AD7280A
AD7280A
AD7280A
5
1µF
Rev. 0 | Page 18 of 48
MASTER
MASTER
1kΩ
4
6
ALERT
CNVST
ALERT
ALERT
V
V
V
1kΩ
SCLK
DV
AV
DRIVE
DV
AV
DRIVE
DV
AV
DRIVE
V
V
V
V
C
V
C
SDO
SDO
SDO
REG
REG
REG
SDI
REF
REF
REF
REF
PD
CS
CC
CC
CC
CC
CC
CC
V
DD
V
(n – 1)
DD
V
10kΩ
10kΩ
DD
0.1µF
0.1µF
1kΩ
1kΩ
1kΩ
1kΩ
n
1µF
1µF
0.1µF
0.1µF
0.1µF
0
4-WIRE SPI INTERFACE
NOTES
1µF
1µF
1µF
1
2
3
4
5
6
7
OPTIONAL INTERFACE PINS
ALL AD7280A DEVICES ON THE DAISY CHAIN
SHOULD BE LOCATED ON THE SAME PCB.
PLACE 22pF DAISY-CHAIN CAPACITORS
AS CLOSE AS POSSIBLE TO THEIR
TERMINATING PINS, THAT IS, CLOSE TO
THE PIN THAT HAS THE ARROW POINTING
TO IT ON THE DIAGRAM.
ROUTE V
A LOW IMPEDANCE CONNECTION BETWEEN THEM.
ROUTE DAISY-CHAIN TRACKS ON AN INNER
PCB LAYER.
ADD A V
DEVICE EXTENDED DOWN OVER AND UNDER
THE DAISY CHAIN TO ACT AS A SHIELD FOR
THE DAISY CHAIN.
PLACE AD7280A PARTS AS CLOSE TOGETHER
AS POSSIBLE ON THE BOARD TO MINIMIZE
THE LENGTH OF THE DAISY-CHAIN TRACKS.
FERRITES ON THE V
WITH 20Ω RESISTORS EXCEPT IN THE CASE OF THE
V
SHOULD BE REPLACED WITH A 0Ω RESISTOR.
SS
0 CONNECTION. IN THIS CASE, THE 20Ω RESISTOR
PROCESSOR
DSP/MICRO-
SS
DD
PLANE FROM THE UPPER SLAVE
AND V
SS
DD
TRACES TO ENSURE
LINES CAN BE REPLACED