AD7280AWBSTZ Analog Devices Inc, AD7280AWBSTZ Datasheet - Page 40

• 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
Example 3: Convert and Read All Parts, All Voltages,
and Three Auxiliary ADC Inputs per Part
In this example, it is assumed that all AD7280As in the daisy
chain have been initialized to their correct device addresses.
1.
2.
Table 25. Example 3: Converting and Reading All Voltages and Three Auxiliary ADC Inputs from All AD7280A Devices
Write Command
Write 1
Write 2
Write 3
Write 4
Write Register Address 0x00 to the read register on all
parts. A device address of 0x00 is used when computing
the CRC for commands to write to all parts. The 32-bit
write command is 0x038011CA (see Table 25, Write 1).
Note that 0x00 is the default value of the read register on
power-up and after a software reset; therefore, this write
operation may not be necessary.
Set Bit D15 and Bit D13 of the control register to 0 on all
parts. Set Bit D14 and Bit D12 of the control register to 1
on all parts. The 32-bit write command is 0x01AA1062
(see Table 25, Write 2).
Device Address
00000
00000
00000
11111
Register Address
011100
001101
011101
000000
Rev. 0 | Page 40 of 48
Data
00000000
01010000
00000010
00000000
3.
4.
5.
Write All
1
1
1
0
Program the CNVST control register to 0x02 on all parts
to allow conversions to be initiated using the CNVST pin.
The 32-bit write command is 0x03A0546A (see
Write 3).
Initiate conversions through the falling edge of CNVST .
Allow sufficient time for all conversions to be completed
plus t
apply a CS low pulse that frames 32 SCLKs for each conver-
sion result to be read back. The 32-bit write command is
0xF800030A, as described in the
(see
Table 25
WAIT
. Following the completion of all conversions,
D11
0
0
0
0
, Write 4).
8-Bit CRC
00111001
00001100
10000101
01100001
D2 to D0
010
010
010
010
Serial Interface
32-Bit Write
Command
0x038011CA
0x01AA1062
0x03A0546A
0xF800030A
Table 25
section
,