LTC2484CDD#PBF Linear Technology, LTC2484CDD#PBF Datasheet - Page 31

• 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
through the input and the reference pins. If large external
input and/or reference capacitors (C
previous section provides formulae for evaluating the effect
of the source resistance upon the converter performance for
any value of f
capacitors (C
source resistance upon the LTC2484 typical performance
can be inferred from Figures 13, 14, 15 and 16 in which
the horizontal axis is scaled by 307200/f
Figure 20. Offset Error vs Output Data Rate and Temperature
Figure 22. –FS Error vs Output Data Rate and Temperature
–1000
–1500
–2000
–2500
–3500
–3000
–500
–10
50
40
30
20
10
0
0
EOSC
IN
0
0
V
V
V
f
V
V
f
, C
O
O
IN(CM)
CC
IN
IN(CM)
CC
10
10
= EXT CLOCK
= EXT CLOCK
OUTPUT DATA RATE (READINGS/SEC)
OUTPUT DATA RATE (READINGS/SEC)
= 0V
. If small external input and/or reference
= V
REF
= V
20
20 30
REF
REF
= V
= V
) are used, the effect of the external
REF(CM)
= 5V
30
REF(CM)
= 5V
T
T
T
A
40
A
40
A
= 85°C
= 85°C
= 25°C
50
50
60
60
T
A
70
70
= 25°C
IN
80
80
, C
REF
90
90 100
2484 F20
2484 F22
EOSC
100
) are used, the
.
Third, an increase in the frequency of the external oscillator
above 1MHz (a more than 3× increase in the output data
rate) will start to decrease the effectiveness of the internal
autocalibration circuits. This will result in a progressive
degradation in the converter accuracy and linearity. Typical
measured performance curves for output data rates up to
100 readings per second are shown in Figures 20 to 27. In
order to obtain the highest possible level of accuracy from
this converter at output data rates above 20 readings per
Figure 21. +FS Error vs Output Data Rate and Temperature
3500
3000
2000
1000
Figure 23. Resolution (Noise
vs Output Data Rate and Temperature
2500
1500
500
24
22
20
18
16
14
12
10
0
0
0
V
V
f
V
V
V
f
RES = LOG 2 (V
O
O
IN(CM)
CC
IN(CM)
CC
IN
10
10
= EXT CLOCK
OUTPUT DATA RATE (READINGS/SEC)
= EXT CLOCK
OUTPUT DATA RATE (READINGS/SEC)
= V
= 0V
= V
T
A
20 30
20 30
REF
= V
= 85°C
REF
= V
REF(CM)
= 5V
REF(CM)
= 5V
REF
T
40
40
A
= 85°C
/NOISE
50
50
T
A
60
60
RMS
= 25°C
70
70
T
)
A
RMS
= 25°C
80
80
≤ 1LSB)
LTC2484
90 100
90 100
2484 F21
2484 F23
31
2484fc