LTC2255/LTC2254 14-Bit, 125/105Msps Low Power 3V ADCs FEATURES DESCRIPTIO Sample Rate: 125Msps/105Msps The LTC 2255/LTC2254 are 14-bit 125Msps/105Msps, Single 3V Supply (2.85V to 3.4V) low power 3V A/D converters designed for digitizing high Low Power: 395mW/320mW frequency, wide dynamic range signals. The LTC2255/ 72.4dB SNR LTC2254 are perfect for demanding imaging and commu- 88dB SFDR nications applications with AC performance that includes No Missing Codes 72.3dB SNR and 85dB SFDR for signals at the Nyquist Flexible Input: 1V to 2V Range frequency. P-P P-P 640MHz Full Power Bandwidth S/H DC specs include 1LSB INL (typ), 0.5LSB DNL (typ) and Clock Duty Cycle Stabilizer no missing codes over temperature. The transition noise Shutdown and Nap Modes is a low 1.3 LSB . RMS Pin Compatible Family A single 3V supply allows low power operation. A separate 125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit) output supply allows the outputs to drive 0.5V to 3.3V 105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit) logic. 80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) A single-ended CLK input controls converter operation. An 40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit) optional clock duty cycle stabilizer allows high perfor- 25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit) mance at full speed for a wide range of clock duty cycles. 10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. 32-Pin (5mm 5mm) QFN Package All other trademarks are the property of their respective owners. U APPLICATIO S Wireless and Wired Broadband Communication Imaging Systems Ultrasound Spectral Analysis Portable Instrumentation TYPICAL APPLICATIO LTC2255: SNR vs Input Frequency, 1dB, 2V Range, 125Msps 75 REFH FLEXIBLE REFERENCE REFL 74 73 OV DD 72 D13 + 14-BIT 71 CORRECTION ANALOG OUTPUT INPUT PIPELINED LOGIC INPUT DRIVERS S/H 70 ADC CORE D0 69 68 OGND 67 CLOCK/DUTY 66 CYCLE CONTROL 65 0 50 100 150 200 250 300 350 INPUT FREQUENCY (MHz) 33554 G09 22554 TA01a CLK 22554fa 1 SNR (dBFS) U ULTC2255/LTC2254 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO OV = V (Notes 1, 2) DD DD TOP VIEW ORDER PART Supply Voltage (V ) ................................................. 4V DD NUMBER Digital Output Ground Voltage (OGND) ....... 0.3V to 1V 32 31 30 29 28 27 26 25 Analog Input Voltage (Note 3) ..... 0.3V to (V + 0.3V) DD LTC2255CUH + AIN 1 24 D10 Digital Input Voltage .................... 0.3V to (V + 0.3V) DD LTC2255IUH AIN 2 23 D9 Digital Output Voltage ................ 0.3V to (OV + 0.3V) DD LTC2254CUH REFH 3 22 D8 Power Dissipation............................................ 1500mW REFH OV 4 21 LTC2254IUH DD 33 Operating Temperature Range REFL OGND 5 20 LTC2255C, LTC2254C ............................. 0C to 70C REFL 6 19 D7 QFN PART* LTC2255I, LTC2254I ...........................40C to 85C V 7 18 D6 DD GND 8 17 D5 MARKING Storage Temperature Range ..................65C to 125C 9 10 11 12 13 14 15 16 2255 2254 UH PACKAGE 32-LEAD (5mm 5mm) PLASTIC QFN T = 125C, = 34C/W JMAX JA EXPOSED PAD (PIN 33) IS GND MUST BE SOLDERED TO PCB Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: