AD7280A Datasheet, PDF (3/48 Pages) Analog Devices – Lithium Ion Battery Monitoring System Cell balancing interface

AD7280A
SPECIFICATIONS
VDD = 8 V to 30 V, VSS = 0 V, DVCC = AVCC = VREG, VDRIVE = 2.7 V to 5.5 V, TA = −40°C to +105°C, unless otherwise noted.
Table 1.
Parameter
DC ACCURACY (VIN0 TO VIN6)¹
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Error Match
Gain Error
Gain Error Match
ADC Unadjusted Error^{2, 3}
Total Unadjusted Error^{4, 5}
Min
Typ
12
±1
±0.8
±1
1
±1
1
±1.2
CELL VOLTAGE INPUTS (VIN0 TO VIN6)
Pseudo Differential Input Voltage
VIN(x) − VIN(x − 1)
Absolute Input Voltage
Common-Mode Input Voltage
Static Leakage Current⁷
Dynamic Leakage Current⁷
Input Capacitance
DC ACCURACY (AUX1 TO AUX6)^{1, 8}
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Error Match
Gain Error
Gain Error Match
ADC Unadjusted Error⁹
Total Unadjusted Error¹⁰
AUXILIARY ADC INPUTS (AUX1 TO AUX6)
Input Voltage Range
Static Leakage Current⁷
Dynamic Leakage Current⁷
Input Capacitance
REFERENCE
Reference Voltage
Reference Voltage Temperature
Coefficient
Output Voltage Hysteresis
Long-Term Drift
Line Regulation
Turn-On Settling Time^{11, 12}
±1.6
1
VCM − VREF
0.5
±5
15
12
±1
±0.8
±2
2
±2
2
±1.2
±1.6
0
±15
15
2.494
2.5
2.494
2.5
±3
±11
50
150
±5
5.5
Max
Unit
Bits
LSB
LSB
LSB
LSB
LSB
LSB
mV
±9
mV
±10
mV
±14.5
mV
Test Conditions/Comments
No missing codes
VIN range⁶ = 1 V to 4.1 V, −10°C to +85°C
VIN range⁶ = 1 V to 4.1 V, −40°C to +85°C
VIN range⁶ = 1 V to 4.1 V, −40°C to +105°C
2 × VREF
V
VCM + VREF V
27.5
V
±70
nA
±3
nA
pF
CNVST pulse every 100 ms
Bits
LSB
LSB
LSB
LSB
LSB
LSB
mV
±20
mV
±22
mV
No missing codes
−40°C to +85°C
−40°C to +105°C
2 × VREF
V
nA
±3
nA
pF
CNVST pulse every 100 ms
2.506
2.509
±15
10
V
V
ppm/°C
−40°C to +85°C
−40°C to +105°C
−40°C to +85°C
ppm/°C
ppm
ppm/1000
hours
ppm/V
ms
−40°C to +105°C
−40°C to +105°C
VREG = 1 μF, VREF = 1 μF, CREF = 100 nF
Rev. 0 | Page 3 of 48