LTC6802-1_1 Datasheet, PDF (3/38 Pages) Linear Technology – Multicell Battery Stack Monitor

LTC6802-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V⁺ = 43.2V, V^– = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
DC Specifications
V_ACC
Measurement Resolution
ADC Offset Voltage
Quantization of the ADC
(Note 2)
l
1.5
l –0.5
0.5
mV/Bit
mV
ADC Gain Error
(Note 2)
–0.12
l –0.22
0.12
%
0.22
%
V_ERR
Total Measurement Error
(Note 4)
V_CELL = 0V
V_CELL = 2.3V
V_CELL = 2.3V
V_CELL = 3.6V
V_CELL = 3.6V
V_CELL = 4.2V
V_CELL = 4.2V
V_CELL = 4.6V
V_TEMP = 2.3V
V_TEMP = 3.6V
V_TEMP = 4.2V
0.8
mV
–2.8
2.8
mV
l –5.1
5.1
mV
–4.3
4.3
mV
l –7.9
7.9
mV
–5
5
mV
l –9.2
9.2
mV
±8
mV
l –5.1
5.1
mV
l –7.9
7.9
mV
l –9.2
9.2
mV
V_CELL Cell Voltage Range
Full Scale Voltage Range
5
V
V_CM
Common Mode Voltage Range Measured Range of Inputs CN for <0.25% Gain Error, N = 3 to 11 l 3.7
Relative to V^–
Range of Input C3 for <1% Gain Error
l 1.8
Range of Input C2 for <0.25% Gain Error
l 1.2
Range of Input C1 for <0.25% Gain Error
l0
5•N
V
15
V
10
V
5
V
Overvoltage (OV) Detection Level
Programmed for 4.2V
l 4.182 4.200 4.218
V
Undervoltage (UV) Detection Level
Programmed for 2.3V
l 2.290 2.300 2.310
V
Die Temperature Measurement Error
V_REF
Reference Pin Voltage
Error in Measurement at 125°C
R_LOAD = 100k to V^–
3
°C
3.020 3.065 3.110
V
l 3.015 3.065 3.115
V
Reference Voltage Temperature Coefficient
8
ppm/°C
Reference Voltage Thermal Hysteresis 25°C to 85°C and 25°C to –40°C
Reference Voltage Long Term Drift
V_REG
Regulator Pin Voltage
10 < V⁺ < 50, No Load
I_LOAD = 4mA
Regulator Pin Short Circuit Current Limit
V_S
Supply Voltage, V⁺ Relative to V^–
V_ERR Specifications Met
Timing Specifications Met
100
ppm
60
ppm/√khr
l 4.5
5.0
5.5
V
l 4.1
4.8
V
l5
8
mA
l 10
l4
50
V
50
V
I_B
Input Bias Current
I_S
Supply Current, Active
I_M
Supply Current, Monitor Mode
I_QS
Supply Current, Idle
In/Out of Pins C1 Thru C12
When Measuring Cells
When Not Measuring Cells
l –10
10
μA
1
nA
Current Into the V⁺ Pin when Measuring Voltages
with the ADC
l
0.8 1.1
mA
1.2
mA
Average Current Into the V⁺ Pin While Monitoring
for UV and OV Conditions
Continuous Monitoring (CDC = 2)
800
μA
Monitor Every 130ms (CDC = 5)
225
μA
Monitor Every 500ms (CDC = 6)
150
μA
Monitor Every 2s (CDC = 7)
100
μA
Current into the V⁺ Pin When Idle
All Serial Port Pins at Logic ‘1’
35
60
80
μA
l 30
85
μA
I_CS
Supply Current, Serial I/O
All Serial Port Pins at Logic ‘0’ V_MODE = 0, This
Current is Added to I_S or I_QS
l3
4.5
mA
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