LTC2942-1I View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC2942-1I
Linear Technology
'LTC2942-1I' PDF : 16 Pages View PDF
Typical Performance Characteristics
Total Charge Error
vs Sense Current
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
1
VSENSE+ = 2.7V
VSENSE+ = 4.2V
10
100
|ISENSE| (mA)
1000
29421 G01
Supply Current vs Supply Voltage
100
TA = 25°C
TA = –40°C
90
TA = 85°C
80
Total Charge Error
vs Supply Voltage
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
2.5 3
|ISENSE| = 1A
|ISENSE| = 200mA
3.5 4 4.5 5 5.5 6
VSENSE+ (V)
29421 G02
Shutdown Supply Current
vs Supply Voltage
2.0
1.5
70
1.0
60
50
40
2.5 3.0
3.5 4.0 4.5 5.0
VSENSE+ (V)
5.5 6.0
29421 G04
Voltage Measurement ADC
Integral Nonlinearity
1.0
TA = 85°C
0.5
0.5
0
2.5 3.0
3.5 4.0 4.5
TA = 25°C
TA = –40°C
TA = 85°C
5.0 5.5 6.0
VSENSE+ (V)
29421 G05
Temperature Error vs Temperature
3
2
1
0
0
TA = –40°C
–0.5
TA = 25°C
–1
–2
–1.0
2.5 3.0
3.5 4.0 4.5 5.0
VSENSE– (V)
5.5 6.0
29421 G07
–3
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
29421 G08
LTC2942-1
Total Charge Error vs Temperature
1.00
TEMPERATURE
0.75
COMPENSATION
TRIM DEVIATION
0.50
+50ppm/K
OPTIMUM
0.25
–50ppm/K
0
–0.25
–0.50
–0.75
–1.00
–50 –25 0
|ISENSE| = 200mA
25 50 75 100
TEMPERATURE (°C)
24921 G03
Voltage Measurement ADC
Total Unadjusted Error
10
8
6
4
TA = 85°C
2
0
–2
TA = –45°C
–4
–6
TA = 25°C
–8
–10
2.5 3.0
3.5 4.0 4.5 5.0
VSENSE– (V)
5.5 6.0
29421 G06
Sense Resistor Stability
0
ACCELERATED LOAD LIFE TEST
DATA SCALED TO TAMB = 85°C,
–0.5
ISENSE = 1A CONDITIONS
–1.0
–1.5
–2.0
–2.5
–3.0
0
10
20
30
40
50
kHOURS
29421 G09
29421f
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