Datasheet

5
LTC2420
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Total Unadjusted Error (3V Supply)
Negative Input Extended Total
Unadjusted Error (3V Supply)
INPUT VOLTAGE (V)
0
ERROR (ppm)
2
6
10
2.0
2420 G01
–2
–6
0
4
8
–4
–8
–10
0.5
1.0
1.5
2.5
V
CC
= 3V
V
REF
= 2.5V
T
A
= –55°C, –45°C, 25°C, 90°C
INPUT VOLTAGE (V)
0
ERROR (ppm)
2
6
10
2.0
2420 G02
–2
–6
0
4
8
–4
–8
–10
0.5
1.0
1.5
2.5
V
CC
= 3V
V
REF
= 2.5V
T
A
= –55°C, –45°C, 25°C, 90°C
INPUT VOLTAGE (V)
0
–10
–6
–2
2
–0.05
–0.10
–0.15 –0.20
2420 G03
–0.25
10
–0.30
ERROR (ppm)
6
–8
–4
0
8
4
V
CC
= 3V
V
REF
= 2.5V
T
A
= 90°C
T
A
= 25°C
T
A
= –45°C
T
A
= –55°C
INL (3V Supply)
Positive Input Extended Total
Unadjusted Error (3V Supply)
INPUT VOLTAGE (V)
2.50
–10
–6
–2
2
2.55
2.60
2.65 2.70
2420 G04
2.75
10
2.80
ERROR (ppm)
6
–8
–4
0
8
4
V
CC
= 3V
V
REF
= 2.5V
T
A
= –55°C, –45°C, 25°C, 90°C
INPUT VOLTAGE (V)
0
ERROR (ppm)
2
6
10
4
2420 G05
–2
–6
0
4
8
–4
–8
–10
1
2
3
5
V
CC
= 5V
V
REF
= 5V
T
A
= –55°C, –45°C, 25°C, 90°C
Total Unadjusted Error (5V Supply) INL (5V Supply)
INPUT VOLTAGE (V)
0
ERROR (ppm)
2
6
10
4
2420 G06
–2
–6
0
4
8
–4
–8
–10
1
2
3
5
V
CC
= 5V
V
REF
= 5V
T
A
= –55°C, –45°C, 25°C, 90°C
Negative Input Extended Total
Unadjusted Error (5V Supply)
INPUT VOLTAGE (V)
0
–10
–6
–2
2
–0.05
–0.10
–0.15 –0.20
2420 G07
–0.25
10
–0.30
ERROR (ppm)
6
–8
–4
0
8
4
V
CC
= 5V
V
REF
= 5V
T
A
= 90°C
T
A
= 25°C
T
A
= –55°C
T
A
= –45°C
Positive Input Extended Total
Unadjusted Error (5V Supply)
INPUT VOLTAGE (V)
5.00
–10
–6
–2
2
5.05
5.10
5.15 5.20
2420 G08
5.25
10
5.30
ERROR (ppm)
6
–8
–4
0
8
4
V
CC
= 5V
V
REF
= 5V
T
A
= –45°C
T
A
= –55°C
T
A
= 25°CT
A
= 90°C
Offset Error vs Reference Voltage
REFERENCE VOLTAGE (V)
0
OFFSET ERROR (ppm)
90
120
150
4
2420 G09
60
30
0
1
2
3
5
V
CC
= 5V
T
A
= 25°C