Datasheet

LTC2942-1
5
29421f
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 Sense Current
Total Charge Error
vs Supply Voltage Total Charge Error vs Temperature
|I
SENSE
| (mA)
1
–0.50
CHARGE ERROR (%)
0
–0.25
–0.75
0.25
0.50
10 100 1000
29421 G01
–1.00
1.00
0.75
V
SENSE
+ = 2.7V
V
SENSE
+ = 4.2V
V
SENSE
+
(V)
2.5
–1.0
CHARGE ERROR (%)
–0.8
–0.4
–0.2
0
1.0
0.4
3.5
4.5
5
29421 G02
–0.6
0.6
0.8
0.2
3
4
5.5
6
|I
SENSE
| = 1A
|I
SENSE
| = 200mA
TEMPERATURE (°C)
–50
CHARGE ERROR (%)
–0.25
0
0.25
25
75
24921 G03
–0.50
–0.75
–1.00
–25 0 50
0.50
0.75
1.00
100
+50ppm/K
OPTIMUM
–50ppm/K
TEMPERATURE
COMPENSATION
TRIM DEVIATION
|I
SENSE
| = 200mA
V
SENSE
+
(V)
2.5
I
SUPPLY
(µA)
80
90
100
4.0 5.0
29421 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
29421 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
29421 G08
V
SENSE
–
(V)
2.5
–10
TOTAL UNADJUSTED ERROR (mV)
–8
–4
–2
0
10
4
3.5
4.5
5.0
29421 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
29421 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
Sense Resistor Stability
kHOURS
–3.0
∆R/R
O
(%)
–2.0
–1.0
0
–2.5
–1.5
–0.5
10 20 30 40
29421 G09
500
ACCELERATED LOAD LIFE TEST
DATA SCALED TO T
AMB
= 85°C,
I
SENSE
= 1A CONDITIONS