
LTC2495
2495fd
typical perForMance characteristics
Long-Term ADC Readings
RMS Noise
vs Input Differential Voltage
RMS Noise vs VIN(CM)
RMS Noise vs Temperature (TA)
RMS Noise vs VCC
RMS Noise vs VREF
Offset Error vs VIN(CM)
Offset Error vs Temperature
TIME (HOURS)
0
–5
ADC
READING
(V)
–3
–1
1
10
20
30
40
2495 G09
50
3
5
–4
–2
0
2
4
60
VCC = 5V
VREF = 5V
VIN = 0V
VIN(CM) = 2.5V
TA = 25°C
RMS NOISE = 0.60V
GAIN = 256
INPUT DIFFERENTIAL VOLTAGE (V)
0.4
RMS
NOISE
(V)
0.6
0.8
1.0
0.5
0.7
0.9
–1.5
–0.5
0.5
1.5
2495 G10
2.5
–2
–2.5
–1
0
1
2
VCC = 5V
VREF = 5V
VIN(CM) = 2.5V
TA = 25°C
fO = GND
VIN(CM) (V)
–1
RMS
NOISE
(V)
0.8
0.9
1.0
2
4
2495 G11
0.7
0.6
0
1
3
5
6
0.5
0.4
VCC = 5V
VREF = 5V
VIN = 0V
TA = 25°C
fO = GND
GAIN = 256
TEMPERATURE (°C)
–45
0.4
RMS
NOISE
(V)
0.5
0.6
0.7
0.8
1.0
–30 –15
15
0
30 45 60
2495 G12
75 90
0.9
VCC = 5V
VREF = 5V
VIN = 0V
VIN(CM) = GND
fO = GND
GAIN = 256
VCC (V)
2.7
RMS
NOISE
(V)
0.8
0.9
1.0
3.9
4.7
2495 G13
0.7
0.6
3.1
3.5
4.3
5.1
5.5
0.5
0.4
VREF = 2.5V
VIN = 0V
VIN(CM) = GND
TA = 25°C
fO = GND
GAIN = 256
VREF (V)
0
0.4
RMS
NOISE
(V)
0.5
0.6
0.7
0.8
0.9
1.0
1
2
3
4
2495 G14
5
VCC = 5V
VIN = 0V
VIN(CM) = GND
TA = 25°C
fO = GND
GAIN = 256
VIN(CM) (V)
–1
OFFSET
ERROR
(ppm
of
V
REF
)
0.1
0.2
0.3
2
4
2495 G15
0
–0.1
0
1
3
5
6
–0.2
–0.3
VCC = 5V
VREF = 5V
VIN = 0V
TA = 25°C
fO = GND
TEMPERATURE (°C)
–45
–0.3
OFFSET
ERROR
(ppm
of
V
REF
)
–0.2
0
0.1
0.2
–15
15 30
90
2495 G16
–0.1
–30
0
45 60 75
0.3
VCC = 5V
VREF = 5V
VIN = 0V
VIN(CM) = GND
fO = GND