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LT6204 Datasheet(PDF) 15 Page - Linear Technology

Part # LT6204
Description  2GHz, 3.5mA Gain of 7 Stable Rail-to-Rail I/O Dual Op Amp
PDF  18 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT6204 Datasheet(HTML) 15 Page - Linear Technology

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LTC6253-7
15
62537f
For more information www.linear.com/LTC6253-7
TYPICAL APPLICATIONS
ADC Driver with Gain
Figure 3 shows the LTC6253-7 acting as a gain of 7 stage
driving the LTC2314-14 14-bit A/D converter. With a gain
of 7V/V, for a 20.5kHz signal a handsome SFDR of 89dB
can be obtained at a –1dBFS input signal, with an SNR of
72dB, at a sampling frequency of 2Msps. Figure 4 shows
the FFT of the ADC’s output.
High Speed Low Voltage Instrumentation Amplifier
Figure5showsahighspeedthreeopampinstrumentation
amplifier with a gain of 41V/V and bandwidth of 47MHz,
operating from a total supply of 3.3V. Op amps U1 and U2
Figure 4. Dynamic Performance, LTC6253-7 Driving LTC2314-14
Figure 3. ADC Driver with Gain
C6
2.2µF
5V
C5
2.2µF
CS
CS
SCK
SCK
SDO
SDO
GND
62537 F03
AIN
C1
47pF
R1
100
VIN = 0V TO
580mV
VDD
REF
LTC2314-14
8-PIN TSOT
OVDD
3.3V
R3
200Ω
C7
2.2µF
4.4V
–0.7V
–
+
½ LTC6253-7
R2
1.21k
OUT
V–
V+
fS = 2Msps
F1 = 20.5kHz
F1 AMPLITUDE = –0.916dBFS
SFDR = 89dB
SNR = 72dB
FREQUENCY (kHz)
0 100 200 300 400 500 600 700 800 900 1000
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
62537 F04
Figure 5. High Speed Low Voltage Instrumentation Amplifier
62537 F05
R5
750Ω
R6
750Ω
R7
750Ω
R8
750Ω
R1
1.2k
R3
30.1Ω
U1
½ LTC6253-7
VS+
VS–
R2
1.2k
R9
200
C1
15pF
AV = 41
BW = 47MHz
VS = ±1.65V
IS = 9mA
U2
½ LTC6253-7
IN+
IN–
VS+
VS–
U3
½ LTC6253
VOUT
R4
30.1Ω
are channels from an LTC6253-7. Op amp U3 can be an
LTC6252 or one channel of an LTC6253. An RC snubber
is used at the common terminal of the 30Ω gain setting
resistorstoeliminatetheeffectsofanyboardlayoutinduced
coupling from the output of an amplifier to the negative
input of the other amplifier. Figure 6 shows the measured
frequency response of the instrumentation amplifier for
Figure 6. Instrumentation Amplifier Frequency Response
FREQUENCY (Hz)
10k
100k
1M
10M
100M 400M
0
4
8
12
16
20
24
28
32
36
40
62537 F06



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