Datasheet

LTC2480
10
2480fe
For more information www.linear.com/LTC2480
TYPICAL PERFORMANCE CHARACTERISTICS
Integral Nonlinearity (2x Speed
Mode; V
CC
= 5V, V
REF
= 2.5V)
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–0.75 –0.25 0.25 0.75
2480 G35
1.25–1.25
V
CC
= 5V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
f
O
= GND
90°C
–45°C, 25°C
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)
INPUT VOLTAGE (V)
–3
INL (ppm OF V
REF
)
–1
1
3
–2
0
2
–0.75 –0.25 0.25 0.75
2480 G36
1.25–1.25
V
CC
= 2.7V
V
REF
= 2.5V
V
IN(CM)
= 1.25V
f
O
= GND
90°C
–45°C, 25°C
OUTPUT READING (µV)
179
NUMBER OF READINGS (%)
8
10
12
186.2
2480 G37
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
2480 G38
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
Offset Error vs V
IN(CM)
(2x Speed Mode)
Offset Error vs Temperature
(2x Speed Mode)
V
IN(CM)
(V)
–1
180
OFFSET ERROR (µV)
182
186
188
190
200
194
1
3
4
2480 G39
184
196
198
192
0
2
5
6
V
CC
= 5V
V
REF
= 5V
V
IN
= 0V
f
O
= GND
T
A
= 25°C
TEMPERATURE (°C)
–45
OFFSET ERROR (µV)
200
210
220
75
2480 G40
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
f
O
= GND
Offset Error vs V
CC
(2x Speed Mode)
Offset Error vs V
REF
(2x Speed Mode)
PSRR vs Frequency at V
CC
(2x Speed Mode)
V
CC
(V)
2 2.5
0
OFFSET ERROR (µV)
100
250
3
4
4.5
2480 G41
50
200
150
3.5
5
5.5
V
REF
= 2.5V
V
IN
= 0V
V
IN(CM)
= GND
f
O
= GND
T
A
= 25°C
V
REF
(V)
0
OFFSET ERROR (µV)
190
200
210
3
5
2480 G42
180
170
160
1 2 4
220
230
240
V
CC
= 5V
V
IN
= 0V
V
IN(CM)
= GND
f
O
= GND
T
A
= 25°C
FREQUENCY AT V
CC
(Hz)
1
0
–20
–40
–60
–80
–100
–120
–140
1k 100k
2480 G43
10 100
10k 1M
REJECTION (dB)
V
CC
= 4.1V DC
REF
+
= 2.5V
REF
–
= GND
IN
+
= GND
IN
–
= GND
f
O
= GND
T
A
= 25°C