Datasheet

LTC2440
6
2440fd
TYPICAL PERFORMANCE CHARACTERISTICS
Integral Nonlinearity
f
OUT
= 6.875Hz
Integral Nonlinearity
vs Conversion Rate Integral Nonlinearity vs V
INCM
Integral Nonlinearity
vs Temperature
Integral Nonlinearity
vs Temperature –Full-Scale Error vs V
REF
+Full-Scale Error vs V
REF
–Full-Scale Error vs V
CC
+Full-Scale Error vs V
CC
V
IN
(V)
–2.5
INL ERROR (ppm OF V
REF
)
0
5
1.5
2440 G10
–5
–10
–1.5
–0.5
0
2.5
10
0.5
–2
–1
2
1
V
CC
= 5V
V
REF
= 5V
V
REF
+
= 5V
V
REF
–
= GND
V
INCM
= 2.5V
f
O
= GND
T
A
= 25°C
CONVERSION RATE (Hz)
0
0
INL ERROR (ppm OF V
REF
)
2.5
5.0
7.5
10.0
500 1000 1500 2000
2440 G11
2500 3000 3500
V
CC
= 5V
V
REF
= 5V
V
REF
+
= 5V
V
REF
–
= GND
–2.5V ≤ V
IN
≤ 2.5V
V
INCM
= 2.5V
f
O
= GND
T
A
= 25°C
V
IN
(V)
–1.25
INL ERROR (ppm OF V
REF
)
0
5
0.75
2440 G12
–5
–10
–0.75
–0.25
1.25
10
0.25
V
CC
= 5V
V
REF
= 2.5V
V
REF
+
= 2.5V
V
REF
–
= GND
OSR = 32768
f
O
= GND
T
A
= 25°C
V
INCM
= 1.25V
V
INCM
= 3.75V
V
INCM
= 2.5V
V
IN
(V)
–1.25
INL ERROR (ppm OF V
REF
)
0
5
0.75
2440 G13
–5
–10
–0.75
–0.25
1.25
10
0.25
V
CC
= 5V
V
REF
= 2.5V
V
REF
+
= 2.5V
V
REF
–
= GND
V
INCM
= 1.25V
OSR = 32768
f
O
= GND
T
A
= 25°C
T
A
= –55°C
T
A
= 125°C
V
IN
(V)
–2.5
INL ERROR (ppm OF V
REF
)
0
5
1.5
2440 G14
–5
–10
–1.5
–0.5
0
2.5
10
0.5
–2
–1
2
1
V
CC
= 5V
V
REF
= 5V
V
REF
+
= 5V
V
REF
–
= GND
V
INCM
= 2.5V
OSR = 32768
f
O
= GND
T
A
= –25°C
T
A
= 125°C
T
A
= 25°C
V
REF
(V)
0
–FULL-SCALE ERROR (ppm OF V
REF
)
0
10
4
2440 G15
–10
–20
1
2
3
5
20
V
REF
(V)
0
+FULL-SCALE ERROR (ppm OF V
REF
)
0
10
4
2440 G16
–10
–20
1
2
3
5
20
V
CC
(V)
4.5
FULL-SCALE ERROR (ppm OF V
REF
)
6
8
10
5.3
2440 G17
4
2
5
7
9
3
1
0
4.7
4.9
5.1
5.5
V
REF
= 2.5V
V
REF
+
= 2.5V
V
REF
–
= GND
V
INCM
= 1.25V
OSR = 32768
f
O
= GND
T
A
= 25°C
V
CC
(V)
4.5
FULL-SCALE ERROR (ppm OF V
REF
)
–4
–2
0
5.3
2440 G18
–6
–8
–5
–3
–1
–7
–9
–10
4.7
4.9
5.1
5.5
V
REF
= 2.5V
V
REF
+
= 2.5V
V
REF
–
= GND
V
INCM
= 1.25V
OSR = 32768
f
O
= GND
T
A
= 25°C