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LTC2222 Datasheet

  • LTC2222

  • 14-Bit, 125/105Msps Low Power 3V ADCs

  • 24頁

  • LINER

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LTC2255/LTC2254
14-Bit, 125/105Msps
Low Power 3V ADCs
FEATURES
鈻?/div>
鈻?/div>
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鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
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DESCRIPTIO
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Sample Rate: 125Msps/105Msps
Single 3V Supply (2.85V to 3.4V)
Low Power: 395mW/320mW
72.4dB SNR
88dB SFDR
No Missing Codes
Flexible Input: 1V
P-P
to 2V
P-P
Range
640MHz Full Power Bandwidth S/H
Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Pin Compatible Family
125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit)
105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit)
80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit)
65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit)
40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit)
25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)
10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit)
32-Pin (5mm
脳
5mm) QFN Package
The LTC
廬
2255/LTC2254 are 14-bit 125Msps/105Msps,
low power 3V A/D converters designed for digitizing high
frequency, wide dynamic range signals. The LTC2255/
LTC2254 are perfect for demanding imaging and commu-
nications applications with AC performance that includes
72.3dB SNR and 85dB SFDR for signals at the Nyquist
frequency.
DC specs include
鹵1LSB
INL (typ),
鹵0.5LSB
DNL (typ) and
no missing codes over temperature. The transition noise
is a low 1.3 LSB
RMS
.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.3V
logic.
A single-ended CLK input controls converter operation. An
optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Wireless and Wired Broadband Communication
Imaging Systems
Ultrasound
Spectral Analysis
Portable Instrumentation
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
OV
DD
SNR (dBFS)
+
ANALOG
INPUT
INPUT
S/H
鈥?/div>
14-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
OUTPUT
DRIVERS
D13
鈥?/div>
鈥?/div>
鈥?/div>
D0
OGND
CLOCK/DUTY
CYCLE
CONTROL
22554 TA01a
CLK
22554f
U
LTC2255: SNR vs Input Frequency,
鈥?dB, 2V Range, 125Msps
75
74
73
72
71
70
69
68
67
66
65
0
50
100 150 200 250 300 350
33554 G09
INPUT FREQUENCY (MHz)
U
U
1

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