Datasheet

LTC6802-2
3
68022fa
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 Quantization of the ADC
l
1.5 mV/Bit
ADC Offset Voltage (Note 2)
l
–0.5 0.5 mV
ADC Gain Error (Note 2)
l
–0.12
–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
l
l
l
l
l
l
–2.8
–5.1
–4.3
–7.9
–5
–9.2
–5.1
–7.9
–9.2
0.8
±8
2.8
5.1
4.3
7.9
5
9.2
5.1
7.9
9.2
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
CELL
Cell Voltage Range Full-Scale Voltage Range 5 V
V
CM
Common Mode Voltage Range Measured
Relative to V
–
Range of Inputs Cn for <0.25% Gain Error, n = 3 to 11
Range of Input C3 for <1% Gain Error
Range of Input C2 for <0.25% Gain Error
Range of Input C1 for <0.25% Gain Error
l
l
l
l
3.7
1.8
1.2
0
5 • n
15
10
5
V
V
V
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 Error in Measurement at 125°C 3 °C
V
REF
Reference Pin Voltage R
LOAD
= 100k to V
–
l
3.020
3.015
3.065
3.065
3.110
3.115
V
V
Reference Voltage Temperature
Coefficient
8 ppm/°C
Reference Voltage Thermal Hysteresis 25°C to 85°C and 25°C to –40°C 100 ppm
Reference Voltage Long-Term Drift 60 ppm/√kHr
V
REG
Regulator Pin Voltage 10 < V
+
< 50, No Load
I
LOAD
= 4mA
l
l
4.5
4.1
5.0
4.8
5.5 V
V
Regulator Pin Short-Circuit Current Limit
l
5 8 mA
V
S
Supply Voltage, V
+
Relative to V
–
V
ERR
Specifications Met
Timing Specifications Met
l
l
10
4
50
50
V
V
I
B
Input Bias Current In/Out of Pins C1 Through C12
When Measuring Cells
When Not Measuring Cells
l
–10
1
10 µA
nA
I
S
Supply Current, Active Current Into the V
+
Pin When Measuring Voltages with
the ADC
l
0.8 1.1
1.2
mA
mA
I
M
Supply Current, Monitor Mode Average Current Into the V
+
Pin While Monitoring for
UV and OV Conditions
Continuous Monitoring (CDC = 2)
Monitor Every 130ms (CDC = 5)
Monitor Every 500ms (CDC = 6)
Monitor Every 2 Seconds (CDC = 7)
800
225
150
100
µA
µA
µA
µA
I
QS
Supply Current, Idle Current Into the V
+
Pin When Idle
All Serial Port Pins at Logic ‘1’
l
37.5
32.5
62.5 82.5
87.5
µA
µA