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LT6237 Datasheet(PDF) 24 Page - Linear Technology

Part # LT6237
Description  Octal, 16-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

LT6237 Datasheet(HTML) 24 Page - Linear Technology

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LTC2345-16
24
234516f
For more information www.linear.com/LTC2345-16
applicaTions inForMaTion
Figure 6a. Buffering Arbitrary, Fully Differential, Bipolar, and Unipolar Signals. See
Table 2 For Recommended Amplifier and Filter Combinations
Figure 6b. Two-Tone Test. IN+ = –7dBFS 2kHz Sine, IN– =
–7dBFS 3.1kHz Sine, Common Mode = 2.5V, 32k Point FFT,
fSMPL = 200ksps. Circuit Shown in Figure 6a with LT6237
Amplifiers, RFILT = 40.2Ω, CFILT = 1nF
Arbitrary Drive
Fully Differential Drive
Bipolar Drive
Unipolar Drive
Figure 6c. IN+/IN– = –1dBFS 2kHz Fully Differential Sine,
Common Mode = 2.5V, 32k Point FFT, fSMPL = 200ksps. Circuit
Shown in Figure 6a with LT6237 Amplifiers, RFILT = 40.2Ω,
CFILT = 1nF
Figure 6d. IN+ = –1dBFS 2kHz Bipolar Sine, IN– = 2.5V, 32k
Point FFT, fSMPL = 200ksps. Circuit Shown in Figure 6a with
LT6237 Amplifiers, RFILT = 40.2Ω, CFILT = 1nF
Figure 6e. IN+ = –1dBFS 2kHz Unipolar Sine, IN– = 0V, 32k Point
FFT, fSMPL = 200ksps. Circuit Shown in Figure 6a with LT6237
Amplifiers, RFILT = 40.2Ω, CFILT = 1nF
SFDR = 120dB
SNR = 91.3dB
±4.096V RANGE
ARBITRARY DRIVE
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234516 F06b
±4.096V RANGE
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
SNR = 91.3dB
THD = –113dB
SINAD = 91.2dB
SFDR = 115dB
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234516 F06c
±2.048V RANGE
BIPOLAR DRIVE (IN– = 2.5V)
SNR = 86.0dB
THD = –110dB
SINAD = 86.0dB
SFDR = 113dB
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234516 F06d
0V TO 4.096V RANGE
UNIPOLAR DRIVE (IN– = 0V)
SNR = 86.1dB
THD = –109dB
SINAD = 86.0dB
SFDR = 110dB
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234516 F06e
6V
–2V
LTC2345-16
234516 F06a
ONLY CHANNEL 0 SHOWN FOR CLARITY
–
+
0.1µF
47µF
IN0+
IN0–
AMPLIFIER
AMPLIFIER
REFIN
REFBUF
OPTIONAL
LOWPASS FILTERS
CFILT
CFILT
RFILT
RFILT
IN+
IN–
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
5V
0V
FULLY
DIFFERENTIAL
5V
0V
BIPOLAR
5V
0V
ARBITRARY
5V
0V
UNIPOLAR



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