Datasheet

LTC2442
3
2442fa
For more information www.linear.com/LTC2442
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SEL
+
Absolute/Common Mode SEL
+
Voltage SEL
+
is the Positive Selected
Input Channel, see Table 3
l
GND – 0.3 V
CC
+ 0.3 V
SEL
–
Absolute/Common Mode SEL
–
Voltage SEL
–
is the Negative Selected
Input Channel, see Table 3
l
GND – 0.3 V
CC
+ 0.3 V
V
IN
Input Differential Voltage Range
(SEL
+
– SEL
–
)
l
–V
REF
/2 V
REF
/2 V
REF
+
Absolute/Common Mode REF
+
Voltage
l
0.1 V
CC
V
REF
–
Absolute/Common Mode REF
–
Voltage
l
GND V
CC
– 0.1 V
V
REF
Reference Differential Voltage Range
(REF
+
– REF
–
)
l
0.1 V
CC
V
C
S(ADCINA)
ADCINA Sampling Capacitance 2 pF
C
S(ADCINB)
ADCINB Sampling Capacitance 2 pF
C
S(REF
+
)
REF
+
Sampling Capacitance 2 pF
C
S(REF
–
)
REF
–
Sampling Capacitance 2 pF
I
DC_LEAK(SEL
+
, SEL
–
,
REF
+
, REF
–
)
Leakage Current, Inputs and Reference CS = V
CC
, SEL
+
= GND, SEL
–
=
GND, REF
+
= 5V, REF
–
= GND
l
–15 1 15 nA
t
OPEN
MUX Break-Before-Make 50 ns
QIRR MUX Off Isolation V
IN
= 2V
P-P
DC to 1.8MHz 120 dB
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 15)
The
l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4, 15)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1V ≤ V
REF
≤ V
CC
, –0.5 • V
REF
≤ V
IN
≤ 0.5 • V
REF
(Note 5)
l
24 Bits
Integral Nonlinearity V
CC
= 5V, REF
+
= 5V, REF
–
= GND, V
INCM
= 2.5V (Note 6, 14)
V
CC
= 5V, REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V (Note 6, 14)
REF
+
= 4.096V, REF
–
= GND, V
INCM
= 2.048V (Note 6, 14)
l
l
2
2
1
10
7
ppm of V
REF
ppm of V
REF
ppm of V
REF
Offset Error 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ SEL
+
= SEL
–
≤ V
CC
(Note 12)
l
2.5 5 µV
Offset Error Drift 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ SEL
+
= SEL
–
≤ V
CC
20 nV/°C
Positive Full-Scale Error REF
+
= 5V, REF
–
= GND, SEL
+
= 3.75V, SEL
–
= 1.25V
REF
+
= 2.5V, REF
–
= GND, SEL
+
= 1.875V, SEL
–
= 0.625V
l
l
10
10
50
50
ppm of V
REF
ppm of V
REF
Positive Full-Scale Error Drift 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
SEL
+
= 0.75 • REF
+
, SEL
–
= 0.25 • REF
+
0.2 ppm of V
REF
/°C
Negative Full-Scale Error REF
+
= 5V, REF
–
= GND, SEL
+
= 1.25V, SEL
–
= 3.75V
REF
+
= 2.5V, REF
–
= GND, SEL
+
= 0.625V, SEL
–
= 1.875V
l
l
10
10
50
50
ppm of V
REF
ppm of V
REF
Negative Full-Scale Error Drift 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
SEL
+
= 0.25 • REF
+
, SEL
–
= 0.75 • REF
+
0.2 ppm of V
REF
/°C
Total Unadjusted Error 5V ≤ V
CC
≤ 5.5V, REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V (Note 6)
5V ≤ V
CC
≤ 5.5V, REF
+
= 5V, REF
–
= GND, V
INCM
= 2.5V (Note 6)
REF
+
= 2.5V, REF
–
= GND, V
INCM
= 1.25V (Note 6)
12
12
12
ppm of V
REF
ppm of V
REF
ppm of V
REF
Input Common Mode Rejection DC 2.5V ≤ REF
+
≤ V
CC
, REF
–
= GND,
GND ≤ SEL
–
= SEL
+
≤ V
CC
120 dB
electrical characteristics
analog input and reFerence