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LTC2440IGN Datasheet(PDF) 14 Page - Linear Technology

Part # LTC2440IGN
Description  24-Bit High Speed Differential delta-sigma ADC with Selectable Speed/Resolution
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2440IGN Datasheet(HTML) 14 Page - Linear Technology

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LTC2440
14
sn2440, 2440fas
APPLICATIO S I FOR ATIO
Table 4. LTC2440 Interface Timing Modes
Conversion
Data
Connection
SCK
Cycle
Output
and
Configuration
Source
Control
Control
Waveforms
External SCK, Single Cycle Conversion
External
CS and SCK
CS and SCK
Figures 5, 6
External SCK, 2-Wire I/O
External
SCK
SCK
Figure 7
Internal SCK, Single Cycle Conversion
Internal
CS
↓
CS
↓
Figures 8, 9
Internal SCK, 2-Wire I/O, Continuous Conversion
Internal
Continuous
Internal
Figure 10
MSB
BIT 28
BIT 27
BIT 26
BIT 25
BIT 1
BIT 0
LSB
Hi-Z
2440 F04
SIG
BIT 29
“0”
BIT 30
EOC
Hi-Z
CS
SCK
SDI
SDO
BUSY
BIT 31
*OSR4 BIT MUST BE AT FIRST SCK RISING EDGE DURING SERIAL DATA OUT CYCLE
OSR4*
OSR3
OSR2
OSR1
OSR0
Figure 4. SDI Speed/Resolution Programming
Table 3. SDI Speed/Resolution Programming
CONVERSION RATE
INTERNAL
EXTERNAL
RMS
OSR4 OSR3 OSR2 OSR1 OSR0 9MHz CLOCK 10.24MHz CLOCK NOISE ENOB
OSR
X
0
0
0
1
3.52kHz
4kHz
23
µV17
64
X
0
0
1
0
1.76kHz
2kHz
3.5
µV
20
128
0
0
0
0
0
880Hz
1kHz
2
µV
21.3
256*
X
0
0
1
1
880Hz
1kHz
2
µV
21.3
256
X
0
1
0
0
440Hz
500Hz
1.4
µV 21.8
512
X
0
1
0
1
220Hz
250Hz
1
µV
22.4
1024
X
0
1
1
0
110Hz
125Hz
750nV 22.9
2048
X
0
1
1
1
55Hz
62.5Hz
510nV 23.4
4096
X
1
0
0
0
27.5Hz
31.25Hz
375nV
24
8192
X
1
0
0
1
13.75Hz
15.625Hz
250nV 24.4
16384
X
1
1
1
1
6.875Hz
7.8125Hz
200nV 24.6 32768**
**Address allows tying SDI HIGH *Additional address to allow tying SDI LOW



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