Datasheet

LTC2480
7
2480fd
Typical perForMance characTerisTics
Integral Nonlinearity
(V
CC
= 5V, V
REF
= 5V)
Integral Nonlinearity
(V
CC
= 5V, V
REF
= 2.5V)
Integral Nonlinearity
(V
CC
= 2.7V, V
REF
= 2.5V)
Total Unadjusted Error
(V
CC
= 5V, V
REF
= 5V)
Total Unadjusted Error
(V
CC
= 5V, V
REF
= 2.5V)
Total Unadjusted Error
(V
CC
= 2.7V, V
REF
= 2.5V)
Noise Histogram (6.8sps) Noise Histogram (7.5sps) Long-Term ADC Readings
INPUT VOLTAGE (V)
–12
TUE (ppm OF V
REF
)
–4
4
12
–8
0
8
–1.5 –0.5 0.5 1.5
2480 G01
2.5–2–2.5 –1 0 1 2
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 2.5V
f
O
= GND
85°C
25°C
–45°C
INPUT VOLTAGE (V)
–12
TUE (ppm OF V
REF
)
–4
4
12
–8
0
8
–0.75 –0.25 0.25 0.75
2480 G02
1.25–1.25
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 1.25V
f
O
= GND
85°C
25°C
–45°C
INPUT VOLTAGE (V)
–12
TUE (ppm OF V
REF
)
–4
4
12
–8
0
8
–0.75 –0.25 0.25 0.75
2480 G03
1.25–1.25
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
f
O
= GND
85°C
25°C
–45°C
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–1.5 –0.5 0.5 1.5
2480 G04
2.5–2–2.5 –1 0 1 2
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 2.5V
f
O
= GND
85°C
–45°C
25°C
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–0.75 –0.25 0.25 0.75
2480 G05
1.25–1.25
V
CC
= 5V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
f
O
= GND
–45°C, 25°C, 90°C
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–0.75 –0.25 0.25 0.75
2480 G06
1.25–1.25
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
f
O
= GND
–45°C, 25°C, 90°C
OUTPUT READING (µV)
–3
NUMBER OF READINGS (%)
8
10
12
0.6
2480 G07
6
4
–1.8 –0.6
–2.4 1.2
–1.2 0 1.8
2
0
14
10,000 CONSECUTIVE
READINGS
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
GAIN = 256
T
A
= 25°C
RMS = 0.60µV
AVERAGE = –0.69µV
OUTPUT READING (µV)
–3
NUMBER OF READINGS (%)
8
10
12
0.6
2480 G08
6
4
–1.8 –0.6
–2.4 1.2
–1.2 0 1.8
2
0
14
10,000 CONSECUTIVE
READINGS
V
CC
= 2.7V
V
REF
= 2.5V
V
IN
= 0V
GAIN = 256
T
A
= 25°C
RMS = 0.59µV
AVERAGE = –0.19µV
TIME (HOURS)
0
–5
ADC READING (µV)
–3
–1
1
10
20
30 40
2480 G09
50
3
5
–4
–2
0
2
4
60
V
CC
= 5V, V
REF
= 5V, V
IN
= 0V, V
IN(CM)
= 2.5V
GAIN = 256, T
A
= 25°C, RMS NOISE = 0.60µV