LTC2251_15 Datasheet, PDF (1/24 Pages) Linear Technology – 10-Bit, 125/105Msps Low Noise 3V ADCs

FEATURES
■ _{Sample Rate: 125Msps/105Msps}
■ _{Single 3V Supply (2.85V to 3.4V)}
■ _{Low Power: 395mW/320mW}
■ _{61.6dB SNR}
■ _{85dB SFDR}
■ _{No Missing Codes}
■ _{Flexible Input: 1VP-P to 2VP-P Range}
■ _{640MHz Full Power Bandwidth S/H}
■ _{Clock Duty Cycle Stabilizer}
■ _{Shutdown and Nap Modes}
■ _{Pin Compatible Family:}
125Msps: LTC2251 (10-Bit), LTC2253 (12-Bit)
105Msps: LTC2250 (10-Bit), LTC2252 (12-Bit)
80Msps: LTC2239 (10-Bit), LTC2229 (12-Bit)
65Msps: LTC2238 (10-Bit), LTC2228 (12-Bit)
40Msps: LTC2237 (10-Bit), LTC2227 (12-Bit)
25Msps: LTC2236 (10-Bit), LTC2226 (12-Bit)
■ _{32-Pin (5mm × 5mm) QFN Package}
U
APPLICATIO S
■ _{Wireless and Wired Broadband Communication}
■ _{Imaging Systems}
■ _Ultrasound
■ _{Spectral Analysis}
■ _{Portable Instrumentation}
LTC2251/LTC2250
10-Bit, 125/105Msps
Low Noise 3V ADCs
DESCRIPTIO
The LTC^®2251/LTC2250 are 10-bit 125Msps/105Msps,
low noise 3V A/D converters designed for digitizing high
frequency, wide dynamic range signals. The LTC2251/
LTC2250 are perfect for demanding imaging and commu-
nications applications with AC performance that includes
61.6dB SNR and 85dB SFDR for signals at the Nyquist
frequency.
DC specs include ±0.1LSB INL (typ), ±0.05LSB DNL (typ)
and ±0.6LSB INL, ±0.6LSB DNL over temperature. The
transition noise is a low 0.08LSB_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.
TYPICAL APPLICATIO
REFH
REFL
ANALOG
INPUT
FLEXIBLE
REFERENCE
+
INPUT
S/H
–
CLOCK/DUTY
CYCLE
CONTROL
CLK
10-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
OUTPUT
DRIVERS
OV_DD
D9
•
•
•
D0
OGND
22510 TA01
LTC2251: SNR vs Input Frequency,
–1dB, 2V Range, 125Msps
65
64
63
62
61
60
59
58
57
56
55
0
50 100 150 200 250 300 350
INPUT FREQUENCY (MHz) 22510 G09
22510fa
1