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LT6233 Datasheet(PDF) 24 Page - Linear Technology

Part # LT6233
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

LT6233 Datasheet(HTML) 24 Page - Linear Technology

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LTC2345-18
24
234518f
For more information www.linear.com/LTC2345-18
applicaTions inForMaTion
6V
–2V
LTC2345-18
234518 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
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
FULLY DIFFERENTIAL DRIVE (IN– = –IN+)
±4.096V RANGE
SINAD = 92.0dB
THD = –111dB
SNR = 92.1dB
FREQUENCY (KHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234518 F06c
SFDR = 113dB
SFDR = 110dB
BIPOLAR DRIVE (IN– = 2.5V)
±2.048V RANGE
SINAD = 86.2dB
THD = –109dB
SNR = 86.2dB
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234518 F06d
SFDR = 109dB
UNIPOLAR DRIVE (IN– = 0V)
0V TO 4.096V RANGE
SINAD = 86.1dB
THD = –108dB
SNR = 86.1dB
FREQUENCY (kHz)
0
20
40
60
80
100
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
234518 F06e
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 F06b



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