Datasheet

6
LTC2420
TYPICAL PERFOR A CE CHARACTERISTICS
UW
RMS Noise vs Reference Voltage Offset Error vs V
CC
REFERENCE VOLTAGE (V)
0
0
RMS NOISE (ppm OF V
REF
)
10
20
30
40
50
60
1234
2420 G10
5
V
CC
= 5V
T
A
= 25°C
V
CC
(V)
2.7
–10
OFFSET ERROR (ppm)
–5
0
5
10
3.2 3.7 4.2 4.7
2420 G11
5.2 5.5
V
REF
= 2.5V
T
A
= 25°C
RMS Noise vs V
CC
V
CC
(V)
2.7
0
RMS NOISE (ppm)
2.5
5.0
7.5
10.0
3.2 3.7 4.2 4.7
2420 G12
5.2 5.5
V
REF
= 2.5V
T
A
= 25°C
Noise Histogram
RMS Noise vs Code Out Offset Error vs Temperature
CODE OUT (HEX)
0 7FFFFF FFFFFF
0
RMS NOISE (ppm)
1.25
2.50
3.75
5.00
2420 G14
V
CC
= 5V
V
REF
= 5V
V
IN
= 0.3V TO 5.3V
T
A
= 25°C
TEMPERATURE (°C)
–55
–10
OFFSET ERROR (ppm)
–5
0
5
10
–30 –5 20 45
2420 G15
70 95 120
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
Full-Scale Error vs Temperature
Full-Scale Error vs V
CC
TEMPERATURE (°C)
–55
–10
FULL-SCALE ERROR (ppm)
–5
0
5
10
–30 –5 20 45
2420 G16
70 95 120
V
CC
= 5V
V
REF
= 5V
V
IN
= 5V
Full-Scale Error
vs Reference Voltage
REFERENCE VOLTAGE (V)
0
–150
FULL-SCALE ERROR (ppm)
–125
–100
–75
–50
–25
0
1234
2420 G17
5
V
CC
= 5V
V
IN
= V
REF
V
CC
(V)
2.7
–10
FULL-SCALE ERROR (ppm)
–5
0
5
10
3.2 3.7 4.2 4.7
2420 G18
5.2 5.5
V
REF
= 2.5V
V
IN
= 2.5V
T
A
= 25°C
OUTPUT CODE (ppm)
0
50
100
150
200
250
300
350
26
2420G13
–2 0
4
NUMBER OF READINGS
V
CC
= 5
V
REF
= 5
V
IN
= 0