Datasheet
LTC2442
6
2442fa
For more information www.linear.com/LTC2442
INPUT VOLTAGE (V)
–1.25
REJECTION (dB)
2
6
10
0.75
2442 G02
–2
–6
0
4
8
–4
–8
–10
–0.75
–0.25
0.25
1.25
V
CC
= 5V
V
REF
= 2.5V
V
IN
CM = 1.25
F
O
= GND
V
+
= 7V
V
–
= –2V
–40°C
25°C 90°C
INPUT VOLTAGE (V)
–2.5
REJECTION (dB)
2
6
10
1.5
2442 G03
–2
–6
0
4
8
–4
–8
–10
–1.5
–0.5
0.5
2.5
V
CC
= 5V
V
REF
= 5V
V
IN
CM = 1.25
F
O
= GND
V
+
= 7V
V
–
= –2V
–40°C
25°C
90°C
V
IN
(V)
–2.5
INL ERROR (ppm)
2
6
10
1.5
2442 G04
–2
–6
0
4
8
–4
–8
–10
–1.5
–0.5
0.5
2.5
V
CC
= 5V
V
–
= GND
F
O
= GND
V
REF
= 5V
V
IN
CM = 2.5V
V
+
= 5V
V
+
= 5.25V
V
+
= 5.5V
V
IN
(V)
–2.5
INL ERROR (ppm)
2
6
10
1.5
2442 G05
–2
–6
0
4
8
–4
–8
–10
–1.5
–0.5
0.5
2.5
V
CC
= 5V
V
+
= 5.5
F
O
= GND
V
REF
= 5V
V
IN
CM = 2.5V
V
–
= 0V
V
–
= –1V
V
–
= –2V
V
INCM
(V)
0
OFFSET ERROR (ppm OF V
REF
)
0
2.5
4
2442 G08
–2.5
–5.0
1
2
3
5
5.0
V
CC
= 5V
V
REF
= 5V
V
REF
+
= 5V
V
REF
–
= GND
SEL
+
= SEL
–
= V
INCM
OSR = 32768
F
O
= GND
T
A
= 25°C
TEMPERATURE (°C)
–55
–5.0
OFFSET ERROR (µV)
–2.5
0
2.5
5.0
–25
5 35 65
2442 G09
95 125
V
CC
= 4.5V
V
REF
= 2.5V
V
REF
+
= 2.5V
V
REF
–
= GND
SEL
+
= SEL
–
= GND
OSR = 256
F
O
= GND
V
CC
= 5.5V, 5V
V
REF
= 5V
V
REF
+
= 5V
V
REF
–
= GND
SEL
+
= SEL
–
= GND
OSR = 256
F
O
= GND
V
CC
= 5V
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
(V)
4.5
OFFSET ERROR (ppm OF V
REF
)
0
2.5
5.3
2442 G06
–2.5
–5.0
4.7
4.9
5.1
5.5
5.0
V
REF
= 2.5V
V
REF
+
= 2.5V
V
REF
–
= GND
SEL
+
= SEL
–
= GND
OSR = 32768
F
O
= GND
T
A
= 25°C
Integral Non-Linearity
Integral Non-Linearity
vs Temperature
Integral Non-Linearity
vs Temperature
INL vs Op Amp Positive Supply
Voltage (V
+
)
INL vs Op Amp Negative Supply
Voltage (V
–
)
Offset Error vs Supply Voltage
Offset Error vs Conversion Rate
Offset Error vs Common Mode
Input Voltage
Offset Error vs Temperature
V
IN
DIFFERENTIAL (V)
–2.048
–5
ERROR (ppm)
–4
–2
–1
0
5
2
–1.024
0
2442 TA02
–3
3
4
1
1.024
2.048
V
INCM
= 2.048V
V
REF
= 4.096V
V
CC
= 5V
V
+
= 5V
V
–
= 0V
CONVERSION RATE (Hz)
0
–5.0
OFFSET ERROR (ppm OF V
REF
)
–2.5
0
2.5
5.0
500 1000 1500 2000
2442 G07
2500 3000 3500
V
CC
= 5V
V
REF
= 5V
V
REF
+
= 5V
V
REF
–
= GND
SEL
+
= SEL
–
= GND
F
O
= GND
T
A
= 25°C
V
+
= 5V
V
–
= –2V
typical perForMance characteristics