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LTC2249_15 Datasheet, PDF (1/24 Pages) Linear Technology – 14-Bit, 80Msps Low Power 3V ADC | |||
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FEATURES
â Sample Rate: 80Msps
â Single 3V Supply (2.7V to 3.4V)
â Low Power: 222mW
â 73dB SNR at 70MHz Input
â 90dB SFDR at 70MHz Input
â No Missing Codes
â Flexible Input: 1VP-P to 2VP-P Range
â 575MHz Full Power Bandwidth S/H
â Clock Duty Cycle Stabilizer
â Shutdown and Nap Modes
â 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)
â 32-Pin (5mm à 5Umm) QFN Package
APPLICATIO S
â Wireless and Wired Broadband Communication
â Imaging Systems
â Ultrasound
â Spectral Analysis
â Portable Instrumentation
LTC2249
14-Bit, 80Msps
Low Power 3V ADC
DESCRIPTIO
The LTC®2249 is a 14-bit 80Msps, low power 3V A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2249 is perfect for de-
manding imaging and communications applications with
AC performance that includes 73dB SNR and 90dB SFDR
for signals well beyond the Nyquist frequency.
DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and
no missing codes over temperature. The transition noise
is a low 1.2LSBRMS.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
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.
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
ANALOG
INPUT
+
INPUT
S/H
â
14-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
CLK
OUTPUT
DRIVERS
OVDD
D13
â¢
â¢
â¢
D0
OGND
2229 TA01
SNR vs Input Frequency,
â1dB, 2V Range
75
74
73
72
71
70
69
68
67
66
65
0
50
100
150
200
INPUT FREQUENCY (MHz)
2249 G09
2249fa
1
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