LTC2494 Linear Technology, LTC2494 Datasheet - Page 9

• Manufacturer Part Number: LTC2494
• Description: 16-Bit 8-/16-Channel ADC
• Manufacturer: Linear Technology

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TYPICAL PERFORMANCE CHARACTERISTICS
150
250
200
100
0.2
–1
–2
–3
1.0
0.8
0.6
0.4
50
3
2
1
0
–1.25
0
0
0
2
Integral Nonlinearity (2x Speed
Mode; V
RMS Noise vs V
(2x Speed Mode)
Offset Error vs V
(2x Speed Mode)
V
V
V
F
V
V
V
F
T
V
V
V
F
T
GAIN = 128
O
CC
REF
IN(CM)
O
A
O
REF
IN
IN(CM)
A
CC
IN
IN(CM)
= GND
= GND
= 25°C
= GND
= 25°C
= 0V
2.5
= 5V
= 0V
= 5V
–0.75
= 2.5V
= 2.5V
1
= 1.25V
= GND
= GND
–45°C, 25°C
CC
85°C
INPUT VOLTAGE (V)
3
= 5V, V
–0.25
2
3.5
V
V
REF
CC
REF
CC
(V)
REF
(V)
0.25
4
3
= 2.5V)
4.5
0.75
4
5
2494 G28
2494 G34
2494 G31
1.25
5.5
5
200
198
196
194
192
190
188
186
184
182
180
200
240
230
220
210
190
180
170
160
–1
–2
–3
3
2
1
0
–1.25
–1
0
Integral Nonlinearity (2x Speed
Mode; V
Offset Error vs V
(2x Speed Mode)
Offset Error vs V
(2x Speed Mode)
V
V
V
F
V
V
V
F
T
V
V
V
F
T
O
O
CC
REF
IN(CM)
CC
REF
IN
A
O
A
CC
IN
IN(CM)
= GND
= GND
= 25°C
= GND
= 25°C
–45°C, 25°C
= 0V
= 0V
= 2.7V
= 5V
= 5V
–0.75
0
= 2.5V
= 5V
85°C
1
= 1.25V
= GND
CC
1
INPUT VOLTAGE (V)
= 2.7V, V
–0.25
V
2
IN(CM)
2
V
REF
IN(CM)
REF
(V)
0.25
(V)
3
REF
3
= 2.5V)
4
0.75
4
5
2494 G29
2494 G32
2494 G35
1.25
6
5
–100
–120
–140
220
210
190
160
–20
–40
–60
–80
240
230
200
180
170
16
14
12
10
0
0
8
6
4
2
179
–45
1
Noise Histogram
(2x Speed Mode)
Offset Error vs Temperature
(2x Speed Mode)
PSRR vs Frequency at V
(2x Speed Mode)
10,000 CONSECUTIVE
READINGS
V
V
V
GAIN = 128
T
V
REF
REF
IN
IN
F
T
V
V
V
V
F
O
CC
REF
IN
A
A
O
CC
CC
REF
IN
IN(CM)
+
–
–30
= 25°C
= GND
= 25°C
= GND
= 0V
+
–
= GND
= GND
= 5V
= 0V
= 4.1V DC
= 5V
10
= 5V
= 5V
= 2.5V
= GND
–15
181.4
= GND
FREQUENCY AT V
OUTPUT READING (μV)
TEMPERATURE (°C)
100
0
15
183.8
LTC2494
1k
30
AVERAGE = 0.184mV
RMS = 0.85μV
CC
10k
45
(Hz)
186.2
CC
60
100k
75
2494 G33
2494 G30
2494 G36
2494fb
9
188.6
1M
90