LTC2485 LINER [Linear Technology], LTC2485 Datasheet - Page 9

• Manufacturer Part Number: LTC2485
• Description: 24-Bit ?? ADC with Easy Drive Input Current Cancellation and I2C Interface
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
500
450
400
350
300
250
200
150
100
–1
–2
–3
3
2
1
0
–1.25
0
Conversion Current
vs Output Data Rate
Integral Nonlinearity (2x Speed
Mode; V
V
IN
IN
CA0/F
T
V
V
V
A
REF
CC
REF
IN(CM)
+
–
10
= 25°C
OUTPUT DATA RATE (READINGS/SEC)
= GND
= GND
–45°C, 25°C
= 2.7V
= V
–0.75
= 2.5V
0
90°C
20
= EXT OSC
= 1.25V
CC
CC
30
INPUT VOLTAGE (V)
= 2.7V, V
–0.25
40
50
200
198
196
194
192
190
188
186
184
182
180
0.25
–1
60
Offset Error vs V
(2x Speed Mode)
V
REF
CC
V
V
V
T
CC
REF
IN
A
V
70
= 5V
= 25°C
CC
= 2.5V)
= 0V
= 5V
0
= 5V
= 3V
0.75
W
80
1
90
2485 G28
2485 G31
U
1.25
100
V
IN(CM)
2
IN(CM)
(V)
3
–1
–2
–3
16
14
12
10
3
2
1
0
4
8
0
6
4
2
–2.5
179
Integral Nonlinearity (2x Speed
Mode; V
Noise Histogram
(2x Speed Mode)
10,000 CONSECUTIVE
READINGS
V
V
V
T
A
CC
REF
IN
–2
5
= 25°C
= 0V
= 5V
2485 G34
= 5V
–1.5
181.4
6
CC
OUTPUT READING (µV)
–1
INPUT VOLTAGE (V)
= 5V, V
–0.5
183.8
0
REF
25°C, 90°C
AVERAGE = 0.184mV
0.5
RMS = 0.86µV
= 5V)
V
V
V
1
–45°C
CC
REF
IN(CM)
186.2
= 5V
1.5
= 5V
= 2.5V
220
210
190
180
160
240
230
200
170
2485 G29
2
2485 G32
–45
Offset Error vs Temperature
(2x Speed Mode)
188.6
2.5
V
V
V
V
CC
REF
IN
IN(CM)
–30
= 0V
= 5V
= 5V
–15
= GND
TEMPERATURE (°C)
1.0
0.8
0.4
0.2
0.6
0
–1
–2
–3
3
2
1
0
0
–1.25
Integral Nonlinearity (2x Speed
Mode; V
RMS Noise vs V
(2x Speed Mode)
0
15
V
V
V
V
V
V
T
CC
IN
IN(CM)
A
CC
REF
IN(CM)
= 25°C
= 0V
30
= 5V
= 5V
–0.75
= 2.5V
1
= GND
= 1.25V
–45°C, 25°C
CC
45
90°C
INPUT VOLTAGE (V)
= 5V, V
–0.25
60
2
V
REF
REF
75
2485 G35
REF
(V)
LTC2485
0.25
90
3
= 2.5V)
0.75
4
2485 G30
2485 G33
2485fa
9
1.25
5