Datasheet LTC2238, LTC2237, LTC2236 (Analog Devices)

LTC2238/LTC2237/LTC2236 10-Bit, 65/40/25Msps Low Noise 3V ADCs
U FEATURES DESCRIPTIO
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Sample Rate: 65Msps/40Msps/25Msps
The LTC®2238/LTC2237/LTC2236 are 10-bit 65Msps/ ■
Single 3V Supply (2.7V to 3.4V)
40Msps/25Msps, low power 3V A/D converters designed ■
Low Power: 205mW/120mW/75mW
for digitizing high frequency, wide dynamic range signals. ■
61.8dB SNR
The LTC2238/LTC2237/LTC2236 are perfect for demand- ■
85dB SFDR
ing imaging and communications applications with AC ■ No Missing Codes performance that includes 61.8dB SNR and 85dB SFDR ■ Flexible Input: 1VP-P to 2VP-P Range for signals at the Nyquist frequency. ■ 575MHz Full Power Bandwidth S/H DC specs include ±0.1LSB INL (typ), ±0.05LSB DNL (typ) ■ Clock Duty Cycle Stabilizer and ±0.5LSB INL, ±0.5LSB DNL over temperature. The ■ Shutdown and Nap Modes transition noise is a low 0.07LSB ■ Pin Compatible Family: RMS. 125Msps: LTC2251 (10-Bit), LTC2253 (12-Bit) A single 3V supply allows low power operation. A separate 105Msps: LTC2250 (10-Bit), LTC2252 (12-Bit) output supply allows the outputs to drive 0.5V to 3.6V 80Msps: LTC2239 (10-Bit), LTC2229 (12-Bit) logic. 65Msps: LTC2238 (10-Bit), LTC2228 (12-Bit) A single-ended CLK input controls converter operation. An 40Msps: LTC2237 (10-Bit), LTC2227 (12-Bit) optional clock duty cycle stabilizer allows high perfor- 25Msps: LTC2236 (10-Bit), LTC2226 (12-Bit) mance at full speed for a wide range of clock duty cycles. ■ 32-Pin (5mm × 5mm) QFN Package
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
All other trademarks are the property of their respective owners. ■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation
U TYPICAL APPLICATIO LTC2238: SNR vs Input Frequency, –1dB, 2V Range, 65Msps
REFH FLEXIBLE 62.5 REFL REFERENCE OVDD 61.5 + D9 10-BIT ANALOG CORRECTION • OUTPUT 60.5 INPUT PIPELINED • INPUT S/H LOGIC DRIVERS ADC CORE • – D0 SNR (dBFS) 59.5 OGND 58.5 CLOCK/DUTY CYCLE CONTROL 57.5 0 50 100 150 200 223876 TA01 INPUT FREQUENCY (MHz) CLK 223876 G09 223876fa 1