LTC2484CDD#PBF Linear Technology, LTC2484CDD#PBF Datasheet - Page 29

• Manufacturer Part Number: LTC2484CDD#PBF
• Description: IC ADC 24BIT 10-DFN
• Manufacturer: Linear Technology

Specifications of LTC2484CDD#PBF

• Number Of Bits: 24
• Sampling Rate (per Second): 6.8
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 480µW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 10-WFDFN Exposed Pad
• Number Of Elements: 1
• Resolution: 24Bit
• Architecture: Delta-Sigma
• Sample Rate: 0.0075KSPS
• Input Polarity: Bipolar
• Input Type: Voltage
• Rated Input Volt: ±2.75V
• Differential Input: Yes
• Power Supply Requirement: Single
• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 2.7V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Integral Nonlinearity Error: 10ppm of Vref
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 10
• Package Type: DFN EP
• Input Signal Type: Differential
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS INFORMATION
in 1.67 • 10
–FS errors for various combinations of source resistance
seen by the V
to that pin are shown in Figures 15-18.
In addition to this gain error, the converter INL per-
formance is degraded by the reference source imped-
ance. The INL is caused by the input dependent terms
–V
pin current as expressed in Figure 11. When using internal
IN
2
Figure 15. +FS Error vs R
Figure 17. +FS Error vs R
/(V
REF
100
–10
500
400
300
200
–6
90
80
70
60
50
40
30
20
10
• R
0
0
REF
0
0
• f
V
V
V
V
f
T
V
V
V
V
f
T
EQ
O
O
A
CC
REF
IN
IN
A
CC
REF
IN
IN
EOSC
= GND
= GND
= 25°C
= 25°C
+
–
pin and external capacitance connected
+
–
) – (0.5 • V
= 5V
= 5V
= 3.75V
= 1.25V
= 3.75V
= 1.25V
= 5V
= 5V
C
200
10
C
REF
C
REF
REF
ppm gain error. The typical +FS and
C
= 0.001μF
REF
= 0.01μF
= 100pF
= 0pF
100
400
R
R
SOURCE
SOURCE
SOURCE
SOURCE
REF
C
REF
600
(Ω)
(Ω)
• D
1k
= 1μF, 10μF
at V
at V
T
C
)/R
REF
C
REF
800
10k
REF
REF
= 0.01μF
EQ
= 0.1μF
2484 F15
(Small C
2484 F17
(Large C
in the reference
100k
1000
REF
REF
)
)
oscillator and 60Hz mode, every 100Ω of reference source
resistance translates into about 0.67ppm additional INL
error. When using internal oscillator and 50Hz/60Hz mode,
every 100Ω of reference source resistance translates into
about 0.61ppm additional INL error. When using internal
oscillator and 50Hz mode, every 100Ω of reference source
resistance translates into about 0.56ppm additional INL
error. When f
frequency f
Figure 18. –FS Error vs R
Figure 16. –FS Error vs R
–100
–300
–400
–500
–200
EOSC
–10
–20
–30
–40
–50
–60
–70
–80
–90
10
0
0
O
0
0
V
V
V
V
f
T
V
V
V
V
f
T
O
O
is driven by an external oscillator with a
A
, every 100Ω of source resistance driving
A
CC
REF
IN
IN
CC
REF
IN
IN
= GND
= GND
= 25°C
= 25°C
+
–
+
–
C
C
= 5V
= 5V
REF
= 1.25V
= 3.75V
= 1.25V
= 3.75V
= 5V
C
= 5V
REF
C
200
REF
10
REF
C
= 1μF, 10μF
= 0.001μF
REF
= 0.01μF
= 100pF
= 0pF
400
R
100
R
SOURCE
SOURCE
SOURCE
SOURCE
600
(Ω)
(Ω)
1k
at V
C
at V
REF
C
REF
800
10k
= 0.01μF
REF
REF
= 0.1μF
LTC2484
2484 F18
(Large C
2484 F16
(Small C
1000
100k
REF
REF
29
)
)
2484fc