LTC2228_15 Datasheet, PDF (1/28 Pages) Linear Technology – 12-Bit, 65/40/25Msps Low Power 3V ADCs

FEATURES
n _{Sample Rate: 65Msps/40Msps/25Msps}
n _{Single 3V Supply (2.7V to 3.4V)}
n _{Low Power: 205mW/120mW/75mW}
n _{71.3dB SNR}
n _{90dB SFDR}
n _{No Missing Codes}
n _{Flexible Input: 1VP-P to 2VP-P Range}
n _{575MHz Full Power Bandwidth S/H}
n _{Clock Duty Cycle Stabilizer}
n _{Shutdown and Nap Modes}
n _{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)
n _{32-Pin (5mm × 5mm) QFN Package}
APPLICATIONS
n _{Wireless and Wired Broadband Communication}
n _{Imaging Systems}
n _Ultrasound
n _{Spectral Analysis}
n _{Portable Instrumentation}
LTC2228/LTC2227/LTC2226
12-Bit, 65/40/25Msps
Low Power 3V ADCs
DESCRIPTION
The LTC^®2228/LTC2227/LTC2226 are 12-bit 65Msps/
40Msps/25Msps, low power 3V A/D converters designed
for digitizing high frequency, wide dynamic range signals.
The LTC2228/LTC2227/LTC2226 are perfect for demand-
ing imaging and communications applications with AC
performance that includes 71.3dB SNR and 90dB SFDR
for signals at the Nyquist frequency.
DC specs include ±0.3LSB INL (typ), ±0.15LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.25LSB_RMS.
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 performance
at full speed for a wide range of clock duty cycles.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
REFH
REFL
FLEXIBLE
REFERENCE
ANALOG
INPUT
+
INPUT
S/H
–
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
CLK
OUTPUT
DRIVERS
OV_DD
D11
•
•
•
D0
OGND
222876 TA01
LTC2228: SNR vs Input Frequency,
–1dB, 2V Range, 65Msps
72
71
70
69
68
0
50
100
150
200
INPUT FREQUENCY (MHz)
2228 G09
222876fb
1