LTC2400CS8#PBF Linear Technology, LTC2400CS8#PBF Datasheet - Page 24

• Manufacturer Part Number: LTC2400CS8#PBF
• Description: IC A/D CONV 24BIT MICRPWR 8-SOIC
• Manufacturer: Linear Technology

Specifications of LTC2400CS8#PBF

• Number Of Bits: 24
• Sampling Rate (per Second): 7.5
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS
LTC2400
V
and full-scale readings for every 1
resistance.
In addition to the input current spikes, the input ESD
protection diodes have a temperature dependent leakage
current. This leakage current, nominally 1nA ( 10nA
max), results in a fixed offset shift of 10 V for a 10k source
resistance.
Reference Current (V
Similar to the analog input, the reference input has a
dynamic input current. This current has negligible effect
on the offset. However, the reference current at V
is similar to the input current at full-scale. For large values
of reference capacitance (C
error shift is 0.3ppm/ of external reference resistance
independent of the capacitance at V
the capacitance tied to V
input resistance of up to 20k (20pF parasitic capacitance
at V
Unlike the analog input, the integral nonlinearity of the
device can be degraded with excessive external RC time
constants tied to the reference input. If the capacitance at
node V
can tolerate large external resistances without reduction
in INL, see Figure 24. If the external capacitance is large
(C
0.15ppm/
Figure 25.
24
REF
VREF
REF
= 5V). This corresponds to a 0.3ppm shift in offset
) may be tolerated, see Figure 23.
REF
Figure 21. Full-Scale Error vs R
> 0.01 F), the linearity will be degraded by
–100
–150
–200
–250
–300
–50
is small (C
0
0
independent of capacitance at V
200
U
C
C
IN
VREF
IN
REF
= 10 F
= 1 F
400
R
REF
INFORMATION
SOURCE
)
C
U
< 0.01 F), the reference input
IN
C
VREF
IN
is small (C
= 0.01 F
= 0.1 F
600
( )
> 0.01 F), the full-scale
SOURCE
W
800
REF
V
V
V
T
A
CC
REF
IN
= 25 C
= 5V
VREF
= 5V
, see Figure 22. If
= 5V
2400 F21
of input source
(Large C)
1000
< 0.01 F), an
U
IN
REF
= V
, see
REF
Figure 23. Full-Scale Error vs R
Figure 22. Full-Scale Error vs R
–10
–20
–10
600
500
400
300
200
100
50
40
30
20
10
50
40
30
20
10
0
Figure 24. INL Error vs R
0
0
1
1
0
V
V
V
T
V
V
T
V
V
V
T
CC
REF
IN
A
A
CC
REF
CC
REF
IN
A
= 25 C
= 25 C
= 5V
= 25 C
= 5V
= 5V
= 5V
= 5V
= 5V
= 5V
= 5V
C
C
C
200
10
C
10
C
VREF
VREF
VREF
C
VREF
VREF
VREF
RESISTANCE AT V
RESISTANCE AT V
RESISTANCE AT V
C
C
VREF
VREF
= 0.01 F
= 1000pF
= 0.01 F
= 1000pF
= 100pF
= 100pF
100
100
400
C
= 10 F
= 0pF
VREF
C
VREF
= 0.01 F
600
1k
1k
= 0.1 F
REF
REF
C
REF
VREF
VREF
( )
( )
C
( )
VREF
10k
VREF
10k
= 1 F
VREF
800
(Small C)
= 0pF
2400 F23
2400 F24
2400 F22
(Small C)
(Large C)
100k
100k
1000