Datasheet

LTC2495
9
2495fd
typical perForMance characteristics
Sleep Mode Current
vs Temperature
Conversion Current
vs Output Data Rate
Integral Nonlinearity (2x Speed
Mode; V
CC
= 5V, V
REF
= 5V)
Integral Nonlinearity (2x Speed
Mode; V
CC
= 5V, V
REF
= 2.5V)
Integral Nonlinearity (2x Speed
Mode; V
CC
= 2.7V, V
REF
= 2.5V)
Noise Histogram
(2x Speed Mode)
RMS Noise vs V
REF
(2x Speed Mode)
Offset Error vs V
IN(CM)
(2x Speed Mode)
TEMPERATURE (°C)
–45
0
SLEEP MODE CURRENT (µA)
0.2
0.6
0.8
1.0
2.0
1.4
–15
15
30 90
2495 G25
0.4
1.6
1.8
1.2
–30 0
45
60
75
V
CC
= 5V
V
CC
= 2.7V
f
O
= GND
OUTPUT DATA RATE (READINGS/SEC)
0
SUPPLY CURRENT (µA)
500
450
400
350
300
250
200
150
100
80
2495 G26
20 40 60 1007010 30 50 90
V
CC
= 5V
V
CC
= 3V
V
REF
= V
CC
IN
+
= GND
IN
–
= GND
f
O
= EXT OSC
T
A
= 25°C
INPUT VOLTAGE (V)
–3
INL (µV)
–1
1
3
–2
0
2
–1.5 –0.5 0.5 1.5
2495 G27
2.5–2–2.5 –1 0 1 2
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 2.5V
f
O
= GND
25°C, 85°C
–45°C
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–0.75 –0.25 0.25 0.75
2495 G28
1.25–1.25
V
CC
= 5V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
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
2495 G29
1.25–1.25
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
f
O
= GND
85°C
–45°C, 25°C
OUTPUT READING (µV)
179
NUMBER OF READINGS (%)
8
10
12
186.2
2495 G30
6
4
181.4 183.8 188.6
2
0
16
14
10,000 CONSECUTIVE
READINGS
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
T
A
= 25°C
GAIN = 128
RMS = 0.85µV
AVERAGE = 0.184µV
V
REF
(V)
0
RMS NOISE (µV)
0.6
0.8
1.0
4
2495 G31
0.4
0.2
0
1
2
3
5
V
CC
= 5V
V
IN
= 0V
V
IN(CM)
= GND
f
O
= GND
T
A
= 25°C
GAIN = 128
V
IN(CM)
(V)
–1
180
OFFSET ERROR (µV)
182
186
188
190
200
194
1
3
4
2495 G32
184
196
198
192
0
2
5
6
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
f
O
= GND
T
A
= 25°C