LTC2440
6
2440fd
TYPICAL PERFORMANCE CHARACTERISTICS
Integral Nonlinearity
fOUT = 6.875Hz
Integral Nonlinearity
vs Conversion Rate
Integral Nonlinearity vs VINCM
Integral Nonlinearity
vs Temperature
Integral Nonlinearity
vs Temperature
–Full-Scale Error vs VREF
+Full-Scale Error vs VREF
–Full-Scale Error vs VCC
+Full-Scale Error vs VCC
VIN (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
VCC = 5V
VREF = 5V
VREF
+ = 5V
VREF
– = GND
VINCM = 2.5V
fO = GND
TA = 25°C
CONVERSION RATE (Hz)
0
INL
ERROR
(ppm
OF
V
REF
)
2.5
5.0
7.5
10.0
500
1000 1500 2000
2440 G11
2500 3000 3500
VCC = 5V
VREF = 5V
VREF
+ = 5V
VREF
– = GND
–2.5V ≤ VIN ≤ 2.5V
VINCM = 2.5V
fO = GND
TA = 25°C
VIN (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
VCC = 5V
VREF = 2.5V
VREF
+ = 2.5V
VREF
– = GND
OSR = 32768
fO = GND
TA = 25°C
VINCM = 1.25V
VINCM = 3.75V
VINCM = 2.5V
VIN (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
VCC = 5V
VREF = 2.5V
VREF
+ = 2.5V
VREF
– = GND
VINCM = 1.25V
OSR = 32768
fO = GND
TA = 25°C
TA = –55°C
TA = 125°C
VIN (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
VCC = 5V
VREF = 5V
VREF
+ = 5V
VREF
– = GND
VINCM = 2.5V
OSR = 32768
fO = GND
TA = –25°C
TA = 125°C
TA = 25°C
VREF (V)
0
–FULL-SCALE
ERROR
(ppm
OF
V
REF
)
0
10
4
2440 G15
–10
–20
1
2
3
5
20
VREF (V)
0
+FULL-SCALE
ERROR
(ppm
OF
V
REF
)
0
10
4
2440 G16
–10
–20
1
2
3
5
20
VCC (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
VREF = 2.5V
VREF
+ = 2.5V
VREF
– = GND
VINCM = 1.25V
OSR = 32768
fO = GND
TA = 25°C
VCC (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
VREF = 2.5V
VREF
+ = 2.5V
VREF
– = GND
VINCM = 1.25V
OSR = 32768
fO = GND
TA = 25°C