LTC2487
Typical perForMance characTerisTics
Integral Nonlinearity
(V
CC
= 5V, V
REF
= 5V)
3
2
INL (ppm of V
REF
)
1
0
85°C
–1
–2
–3
–2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5
INPUT VOLTAGE (V)
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 2.5V
F
O
= GND
25°C
INL (ppm of V
REF
)
–45°C
3
2
1
0
–1
–2
–3
–1.25
Integral Nonlinearity
(V
CC
= 5V, V
REF
= 2.5V)
V
CC
= 5V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
F
O
= GND
–45°C, 25°C, 85°C
INL (ppm of V
REF
)
3
2
1
0
–1
–2
Integral Nonlinearity
(V
CC
= 2.7V, V
REF
= 2.5V)
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
F
O
= GND
–45°C, 25°C, 85°C
2
2.5
–0.75
–0.25
0.25
0.75
INPUT VOLTAGE (V)
1.25
2487 G02
–3
–1.25
–0.75
–0.25
0.25
0.75
INPUT VOLTAGE (V)
1.25
2487 G03
2487 G01
12
8
TUE (ppm of V
REF
)
4
0
–4
–8
Total Unadjusted Error
(V
CC
= 5V, V
REF
= 5V)
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 2.5V
F
O
= GND
12
8
TUE (ppm of V
REF
)
4
0
–4
–8
Total Unadjusted Error
(V
CC
= 5V, V
REF
= 2.5V)
V
CC
= 5V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
F
O
= GND
85°C
25°C
TUE (ppm of V
REF
)
12
8
4
0
–4
–8
Total Unadjusted Error
(V
CC
= 2.7V, V
REF
= 2.5V)
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
F
O
= GND
25°C
85°C
25°C
85°C
–45°C
–45°C
–45°C
–12
–2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5
INPUT VOLTAGE (V)
2
2.5
–12
–1.25
–0.75
–0.25
0.25
0.75
INPUT VOLTAGE (V)
1.25
2487 G05
–12
–1.25
–0.75
–0.25
0.25
0.75
INPUT VOLTAGE (V)
1.25
2487 G06
2487 G04
Noise Histogram (6.8sps)
14
10,000 CONSECUTIVE
READINGS
12
RMS = 0.60µV
V
CC
= 5V
AVERAGE = –0.69µV
V
REF
= 5V
10 V
IN
= 0V
T
A
= 25°C
8 GAIN = 256
6
4
2
0
–3 –2.4 –1.8 –1.2 –0.6 0 0.6
OUTPUT READING (µV)
1.2
1.8
14
Noise Histogram (7.5sps)
10,000 CONSECUTIVE
READINGS
RMS = 0.59µV
12
V
CC
= 2.7V
AVERAGE = –0.19µV
V
REF
= 2.5V
10 V
IN
= 0V
T
A
= 25°C
8 GAIN = 256
6
4
2
0
–3 –2.4 –1.8 –1.2 –0.6 0 0.6
OUTPUT READING (µV)
1.2
1.8
5
4
3
ADC READING (µV)
2
1
0
–1
–2
–3
–4
–5
Long-Term ADC Readings
V
CC
= 5V
T
A
= 25°C
V
REF
= 5V
RMS NOISE = 0.60µV
V
IN
= 0V
GAIN = 256
V
IN(CM)
= 2.5V
NUMBER OF READINGS (%)
NUMBER OF READINGS (%)
0
10
30
40
20
TIME (HOURS)
50
60
2487 G09
2487 G07
2487 G08
2487fa
LINER [ LINEAR TECHNOLOGY ]
