Datasheet

LTC2481
9
2481fc
TYPICAL PERFORMANCE CHARACTERISTICS
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)
Offset Error vs Temperature
(2x Speed Mode)
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)
OUTPUT DATA RATE (READINGS/SEC)
0
SUPPLY CURRENT (µA)
500
450
400
350
300
250
200
150
100
80
2481 G28
20 40 60 1007010 30 50 90
V
CC
= 5V
V
CC
= 3V
V
REF
= V
CC
IN
+
= GND
IN
–
= GND
CA0/f
0
= EXT OSC
T
A
= 25°C
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–1.5 –0.5 0.5 1.5
2481 G29
2.5–2–2.5 –1 0 1 2
V
CC
= 5V
V
REF
= 5V
V
IN(CM)
= 2.5V
25°C, 90°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
2481 G30
1.25–1.25
V
CC
= 5V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
90°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
2481 G31
1.25–1.25
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
90°C
–45°C, 25°C
OUTPUT READING (µV)
179
NUMBER OF READINGS (%)
8
10
12
186.2
2481 G32
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
GAIN = 256
T
A
= 25°C
RMS = 0.86µV
AVERAGE = 0.184mV
V
REF
(V)
0
RMS NOISE (µV)
0.6
0.8
1.0
4
2481 G33
0.4
0.2
0
1
2
3
5
V
CC
= 5V
V
IN
= 0V
V
IN(CM)
= GND
T
A
= 25°C
V
IN(CM)
(V)
–1
180
OFFSET ERROR (µV)
182
186
188
190
200
194
1
3
4
2481 G34
184
196
198
192
0
2
5
6
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
T
A
= 25°C
TEMPERATURE (°C)
–45
OFFSET ERROR (µV)
200
210
220
75
2481 G35
190
180
160
–15
15
45
–30 90
0
30
60
170
240
230
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
V
IN(CM)
= GND