Datasheet

LTC2942
5
2942fa
Typical perFormance characTerisTics
Supply Current vs Supply Voltage
Shutdown Supply Current
vs Supply Voltage
Voltage Measurement ADC
Total Unadjusted Error
Temperature Error vs Temperature
Total Charge Error vs Differential
Sense Voltage
Total Charge Error
vs Supply Voltage Total Charge Error vs Temperature
V
SENSE
(mV)
0.1
–1
CHARGE ERROR (%)
0
–2
2
1
1 10 100
2942 G01
–3
3
V
SENSE
+ = 2.7V
V
SENSE
+ = 4.2V
V
SENSE
+
(V)
2.5
CHARGE ERROR (%)
–1.00
–0.50
–0.25
0
1.00
0.25
3.5
4.5
5.0
2942 G02
–0.75
0.50
0.75
3.0
4.0
5.5
6.0
V
SENSE
= –50mV
V
SENSE
= –10mV
TEMPERATURE (°C)
–50
CHARGE ERROR (%)
–1.00
–0.50
–0.25
0
0.50
25
50
2942 G03
–0.75
0.75
1.00
0.25
–25 0
75
100
V
SENSE
= –50mV
V
SENSE
= –10mV
V
SENSE
+
(V)
2.5
I
SUPPLY
(µA)
80
90
100
4.0 5.0
2942 G04
70
60
3.0 3.5
4.5 5.5 6.0
50
40
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
V
SENSE
+
(V)
2.5
0
I
SHUTDOWN
(µA)
1.0
2.0
3.5
4.5
5.0
2942 G05
0.5
1.5
3.0
4.0
5.5
6.0
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
Voltage Measurement ADC
Integral Nonlinearity
TEMPERATURE (°C)
–50 –25
–3
TEMPERATURE ERROR (°C)
–2
–1
0
1
2
3
0 755025 100
2942 G08
V
SENSE
–
(V)
2.5
–10
TOTAL UNADJUSTED ERROR (mV)
–8
–4
–2
0
10
4
3.5
4.5
5.0
2942 G06
–6
6
8
2
3.0
4.0
5.5
6.0
T
A
= 25°C
T
A
= 85°C
T
A
= –45°C
V
SENSE
–
(V)
2.5
INL (V
LSB
)
4.0
2942 G07
0
–1.0
3.0 3.5 4.5
1.0
0.5
–0.5
5.0 5.5 6.0
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C