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LTC2756 Datasheet(PDF) 10 Page - Linear Technology

Part # LTC2756
Description  Octal, 18-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range
PDF  40 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2756 Datasheet(HTML) 10 Page - Linear Technology

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LTC2345-18
10
234518f
For more information www.linear.com/LTC2345-18
Typical perForMance characTerisTics
32k Point FFT fSMPL = 200kHz,
fIN = 2kHz
SNR, SINAD vs VREFBUF,
fIN = 2kHz
THD, Harmonics vs VREFBUF,
fIN = 2kHz
SNR, SINAD
vs Input Frequency
THD, Harmonics
vs Input Frequency
THD, Harmonics vs Input
Common Mode, fIN = 2kHz
32k Point Arbitrary Two-Tone FFT
fSMPL = 200kHz, IN+ = –7dBFS 2kHz
Sine, IN– = –7dBFS 3.1kHz Sine
SNR, SINAD vs Input Level,
fIN = 2kHz
CMRR vs Input Frequency and
Channel
TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal
Reference and Buffer (VREFBUF  = 4.096V), fSMPL = 200ksps, unless otherwise noted.
2ND
THD
3RD
1VPP FULLY DIFFERENTIAL DRIVE
±4.096V RANGE
INPUT COMMON MODE (V)
0
1
2
3
4
5
–130
–125
–120
–115
–110
–105
–100
234518 G16
SNR
SINAD
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
±4.096V RANGE
INPUT LEVEL (dBFS)
–40
–30
–20
–10
0
92.0
92.2
92.4
92.6
92.8
93.0
234518 G17
ALL CHANNELS
IN+ = IN– = 3.6Vpp SINE
±4.096V RANGE
FREQUENCY (Hz)
10
100
1k
10k
100k
1M
80
90
100
110
120
130
140
150
234518 G18
SNR
SINAD
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
±VREFBUF RANGE
REFBUF VOLTAGE (V)
2.5
3
3.5
4
4.5
5
87
89
91
93
95
97
234518 G12
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
±4.096V RANGE
SNR
SINAD
FREQUENCY (Hz)
100
1k
10k
100k
78
82
86
90
94
98
102
234518 G14
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
±4.096V RANGE
THD
2ND
3RD
FREQUENCY (Hz)
100
1k
10k
100k
–130
–120
–110
–100
–90
–80
–70
234518 G15
ARBITRARY DRIVE
SNR = 92.1dB
SFDR = 120dB
±4.096V RANGE
FREQUENCY (KHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234518 G10
UNIPOLAR DRIVE (IN– = 0V)
0V TO 4.096V RANGE
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234518 G11
SNR = 86.1dB
THD = –111dB
SINAD = 86.1dB
SFDR = 112dB
THD
2ND
3RD
FULLY DIFFERENIAL DRIVE (IN– = –IN+)
±VREFBUF RANGE
REFBUF VOLTAGE (V)
2.5
3
3.5
4
4.5
5
–140
–135
–130
–125
–120
–115
–110
–105
–100
234518 G13



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