LTC2238_15 Datasheet, PDF (1/28 Pages) Linear Technology – 10-Bit, 65/40/25Msps Low Noise 3V ADCs

FEATURES
■ _{Sample Rate: 65Msps/40Msps/25Msps}
■ _{Single 3V Supply (2.7V to 3.4V)}
■ _{Low Power: 205mW/120mW/75mW}
■ _{61.8dB SNR}
■ _{85dB SFDR}
■ _{No Missing Codes}
■ _{Flexible Input: 1VP-P to 2VP-P Range}
■ _{575MHz 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}
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
ANALOG
INPUT
+
INPUT
S/H
–
10-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
CLK
LTC2238/LTC2237/LTC2236
10-Bit, 65/40/25Msps
Low Noise 3V ADCs
DESCRIPTIO
The LTC^®2238/LTC2237/LTC2236 are 10-bit 65Msps/
40Msps/25Msps, low power 3V A/D converters designed
for digitizing high frequency, wide dynamic range signals.
The LTC2238/LTC2237/LTC2236 are perfect for demand-
ing imaging and communications applications with AC
performance that includes 61.8dB SNR and 85dB SFDR
for signals at the Nyquist frequency.
DC specs include ±0.1LSB INL (typ), ±0.05LSB DNL (typ)
and ±0.5LSB INL, ±0.5LSB DNL over temperature. The
transition noise is a low 0.07LSB_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 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.
OUTPUT
DRIVERS
LTC2238: SNR vs Input Frequency,
–1dB, 2V Range, 65Msps
62.5
OV_DD
61.5
D9
•
•
60.5
•
D0
59.5
OGND
58.5
223876 TA01
57.5
0
50
100
150
200
INPUT FREQUENCY (MHz)
223876 G09
223876fa
1