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LTC2420C Datasheet(PDF) 7 Page - Linear Technology

Part # LTC2420C
Description  20-Bit uPower No Latency ADC in SO-8
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2420C Datasheet(HTML) 7 Page - Linear Technology

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7
LTC2420
APPLICATIO S I FOR ATIO
Figure 2. Output Data Timing
Table 2. LTC2420 Output Data Format
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Bit 15
…
Bit 0
Input Voltage
EOC
DMY
SIG
EXR
MSB
LSB
VIN > 9/8 • VREF
0
0
1100
0
11...
1
9/8 • VREF
0
0
1100
0
11...
1
VREF + 1LSB
0
0
1100
0
00...
0
VREF
0
0
1011
1
11...
1
3/4VREF + 1LSB
0
0
1011
0
00...
0
3/4VREF
0
0
1010
1
11...
1
1/2VREF + 1LSB
0
0
1010
0
00...
0
1/2VREF
0
0
1001
1
11...
1
1/4VREF + 1LSB
0
0
1001
0
00...
0
1/4VREF
0
0
1000
1
11...
1
0+/0–
0
0
1/0*
000
0
00...
0
–1LSB
0
0
0111
1
11...
1
–1/8 • VREF
0
0
0111
1
00...
0
VIN < –1/8 • VREF
0
0
0111
1
00...
0
*The sign bit changes state during the 0 code.
MSB
EXT
SIG
“0”
1
2
3
4
5
192024
BIT 0
BIT 19
BIT 4
LSB20
BIT 20
BIT 21
BIT 22
SDO
SCK
CS
EOC
BIT 23
SLEEP
DATA OUTPUT
CONVERSION
2420 F02
Hi-Z
Figure 3. Selectable 100 Samples/Second Turbo Mode
Figure 4. Total Error vs Output Rate (VREF = 5V)
FO
SCK
SDO
CS
VCC
VREF
VIN
GND
8
7
6
5
1
2
3
4
LTC2420
800Hz NOTCH (100 SAMPLES/SECOND)
60Hz NOTCH (7.5 SAMPLES/SECOND)
EXTERNAL 2.048MHz CLOCK SOURCE
INTERNAL 153.6kHz OSCILLATOR
2420 F03
OUTPUT RATE (SAMPLES/SEC)
0
96
128
160
12 BITS
13 BITS
14 BITS
16 BITS
2420 F04
64
32
0
50
100
192
224
256
VREF = 5V
150


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