AD7280AWBSTZ Analog Devices Inc, AD7280AWBSTZ Datasheet - Page 28

• 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
REGISTER MAP
Table 13.
Register Name
Cell Voltage 1
Cell Voltage 2
Cell Voltage 3
Cell Voltage 4
Cell Voltage 5
Cell Voltage 6
AUX ADC 1
AUX ADC 2
AUX ADC 3
AUX ADC 4
AUX ADC 5
AUX ADC 6
Self-Test
Control
Cell Overvoltage
Cell Undervoltage
AUX ADC Overvoltage
AUX ADC Undervoltage
Alert
Cell Balance
CB1 Timer
CB2 Timer
CB3 Timer
CB4 Timer
CB5 Timer
CB6 Timer
PD Timer
Read
CNVST Control
CELL VOLTAGE REGISTERS
The cell voltage registers store the conversion result from each cell
input. The conversion result is in 12-bit straight binary format.
AUXILIARY ADC REGISTERS
The AUX ADC registers store the conversion result from each
auxiliary ADC input. The conversion result is in 12-bit straight
binary format.
SELF-TEST REGISTER
The self-test register stores the conversion result of the ADC
self-test. The conversion result is in 12-bit straight binary format.
CONTROL REGISTER
The control register is a 16-bit register that is used to configure
the AD7280A. Table 14 describes the operation of each bit in
the control register.
Register
Address
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
Register
Data
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D11 to D0
D15 to D8
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
D7 to D0
Read/Write
Register
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read only
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Rev. 0 | Page 28 of 48
Table 14. Control Register Settings
Bits
[D15:D14]
[D13:D12]
D11
[D10:D9]
D8
D7
[D6:D5]
D4
D3
D2
D1
D0
Description
Select conversion inputs
00 = six cell voltages and six AUX ADCs (default)
01 = six cell voltages and AUX1, AUX3, and AUX5
10 = six cell voltages only
11 = ADC self-test
Read conversion results
00 = six voltages and six AUX ADCs (default)
01 = six voltages and AUX1, AUX3, and AUX5
10 = six cell voltages only
11 = no-read operation
Conversion start format
0 = falling edge of CNVST input (default)
1 = rising edge of CS
Conversion averaging
00 = single conversion only (default)
01 = average by 2
10 = average by 4
11 = average by 8
Power-down format
0 = falling edge of PD input (default)
1 = software power-down
Software reset
0 = take the AD7280A out of reset (default)
1 = reset the AD7280A
Set acquisition time
00 = 400 ns (default)
01 = 800 ns
10 = 1.2 μs
11 = 1.6 μs
Reserved; set to 1
Thermistor termination resistor
0 = function not in use (default)
1 = termination resistor connected
Lock device address
0 = does not lock to new device address; continues
to operate with Device Address 0x00 (default)
1 = part locks to new device address that it is
presented with
Increment device address
0 = does not increment the device address when
transferring data up the daisy chain
1 = increments the device address when
transferring data up the daisy chain (default)
Daisy-chain register readback
0 = function not in use; registers are read in single
register readback mode
1 = set daisy chain for register readback (default)