LTC2440 Linear Technology, LTC2440 Datasheet - Page 7

• Manufacturer Part Number: LTC2440
• Description: 24-Bit High Speed Differential delta-sigma ADC
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
–2.5
–5.0
–5.0
–2.5
–20
–10
–15
5.0
2.5
5.0
2.5
10
–5
20
15
0
0
5
0
–55
–55
0
Offset Error vs Temperature
Offset Error vs Conversion Rate
Negative Full-Scale Error
vs Temperature
V
V
V
V
V
5.5V
CC
REF
REF
REF
CC
500 1000 1500 2000
4.5V
= 5V
= 5V
+
–
–25
–25
= 5V
= 5V
= GND
V
V
V
V
V
OSR = 256
F
5V
O
CC
REF
REF
REF
IN
= GND
CONVERSION RATE (Hz)
+
= 4.5V
+
–
= V
= 2.5V
TEMPERATURE (°C)
TEMPERATURE (°C)
V
= 2.5V
= GND
5
V
V
V
V
V
OSR = 32768
F
5
CC
IN
O
CC
REF
REF
REF
INCM
V
F
T
–
O
A
= GND
IN
= 5.5V
= 4.5V
= GND
+
–
= GND
= 25°C
+
= 4.5V
= 4.5V
= GND
= V
= 2.25V
35
35
IN
–
V
V
V
V
V
OSR = 256
F
V
= GND
O
CC
REF
REF
REF
IN
CC
65
65
= GND
2500 3000 3500
+
V
V
V
V
V
OSR = 32768
F
= 5.5V, 5V
= 4.5V
+
–
O
= V
CC
REF
REF
REF
INCM
= 5V
= 5V
= GND
= GND
W
= 5.5V, 5V
IN
+
–
= 5V
–
= 5V
= GND
95
95
= 2.5V
= GND
2440 G19
2440 G22
2440 G25
U
125
125
–2.5
–5.0
–20
–10
–15
5.0
2.5
20
18
16
14
12
10
10
–5
20
15
8
6
4
2
0
2000
0
5
0
–55
0
INL vs Output Rate
(OSR = 128) External Clock Sweep
10MHz to 20MHz
Offset Error vs V
Positive Full-Scale Error
vs Temperature
V
V
V
V
EXTERNAL CLOCK 10MHz
(OR INTERNAL OSCILLATOR)
5.5V
CC
REF
REF
REF
V
TEMP = 25°C
SWEEP (V
REF
4.5V
= 5V
+
–
–25
= 5V
= 5V
= GND
= V
1
2500
5V
CC
IN
OUTPUT RATE (Hz)
TEMPERATURE (°C)
= 5V
– V
5
V
V
V
V
V
OSR = 32768
F
V
OSR = 32768
F
T
O
O
A
CC
REF
REF
REF
INCM
IN
2
REF
= GND
= GND
= 25°C
V
+
= 4.5V
INCM
+
–
= V
= 4.5V
3000
/2) TO V
= 4.5V
= GND
= 2.25V
INCM
35
IN
(V)
–
= V
3
REF
65
EXTERNAL
CLOCK 20MHz
INCM
V
V
V
V
V
OSR = 32768
F
3500
O
CC
REF
REF
REF
INCM
/2
= GND
= 5.5V, 5V
+
–
4
= 5V
95
= 5V
= GND
= 2.5V
2440 G20
2440 G26
2440 G23
4000
125
5
–2.5
–5.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
5.0
2.5
5
4
3
2
1
0
2000
0
–55
4.5
RMS Noise vs Output Rate
(OSR = 128) External Clock Sweep
10MHz to 20MHz
RMS Noise vs Temperature
Offset Error vs V
V
V
V
V
V
TEMP = 25°C
V
REF
REF
REF
IN
REF
IN
+
–25
± V
+
–
= V
= 2.5V
= V
V
V
V
V
V
OSR = 256
F
= 2.5V
= GND
4.7
O
2500
CC
REF
REF
REF
IN
REF
IN
= GND
CC
+
–
V
V
V
= 4.5V
+
–
/2
= V
= 2.5V
TEMPERATURE (°C)
OUTPUT RATE (Hz)
= GND
CC
CC
CC
= 5V
= 2.5V
= GND
5
IN
= 4.5V
= 5V
= 5.5V
4.9
–
= GND
V
3000
OSR = 32768
F
T
CC
O
A
35
LTC2440
CC
= GND
= 25°C
(V)
5.1
V
V
V
V
V
OSR = 256
F
O
CC
REF
REF
REF
IN
65
= GND
+
= 5.5V, 5V
+
–
3500
= V
= 5V
sn2440, 2440fas
= 5V
= GND
IN
5.3
–
95
= GND
2440 G27
2440 G24
2440 G21
7
4000
125
5.5