LTC2251/LTC2250 10-Bit, 125/105Msps Low Noise 3V ADCs FEATURES DESCRIPTIO Sample Rate: 125Msps/105Msps The LTC 2251/LTC2250 are 10-bit 125Msps/105Msps, Single 3V Supply (2.85V to 3.4V) low noise 3V A/D converters designed for digitizing high Low Power: 395mW/320mW frequency, wide dynamic range signals. The LTC2251/ 61.6dB SNR LTC2250 are perfect for demanding imaging and commu- 85dB SFDR nications applications with AC performance that includes No Missing Codes 61.6dB 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 0.1LSB INL (typ), 0.05LSB DNL (typ) Clock Duty Cycle Stabilizer and 0.6LSB INL, 0.6LSB DNL over temperature. The Shutdown and Nap Modes transition noise is a low 0.08LSB . RMS Pin Compatible Family: A single 3V supply allows low power operation. A separate 125Msps: LTC2251 (10-Bit), LTC2253 (12-Bit) output supply allows the outputs to drive 0.5V to 3.3V 105Msps: LTC2250 (10-Bit), LTC2252 (12-Bit) logic. 80Msps: LTC2239 (10-Bit), LTC2229 (12-Bit) 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 , LTC and LT are registered trademarks of Linear Technology Corporation. U All other trademarks are the property of their respective owners. APPLICATIO S Wireless and Wired Broadband Communication Imaging Systems Ultrasound Spectral Analysis Portable Instrumentation TYPICAL APPLICATIO LTC2251: SNR vs Input Frequency, 1dB, 2V Range, 125Msps REFH FLEXIBLE 65 REFERENCE REFL 64 OV DD 63 62 D9 + 10-BIT 61 ANALOG CORRECTION INPUT OUTPUT PIPELINED LOGIC INPUT DRIVERS S/H ADC CORE 60 D0 59 OGND 58 57 CLOCK/DUTY 56 CYCLE CONTROL 55 0 50 100 150 200 250 300 350 22510 TA01 INPUT FREQUENCY (MHz) 22510 G09 CLK 22510fa 1 SNR (dBFS) U ULTC2251/LTC2250 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO OV = V (Notes 1, 2) DD DD Supply Voltage (V ) ................................................. 4V ORDER PART TOP VIEW DD Digital Output Ground Voltage (OGND) ....... 0.3V to 1V NUMBER Analog Input Voltage (Note 3) ..... 0.3V to (V + 0.3V) DD 32 31 30 29 28 27 26 25 LTC2251CUH Digital Input Voltage .................... 0.3V to (V + 0.3V) + DD AIN 1 24 D6 LTC2251IUH Digital Output Voltage ................ 0.3V to (OV + 0.3V) DD AIN 2 23 D5 LTC2250CUH Power Dissipation............................................ 1500mW REFH 3 22 D4 LTC2250IUH REFH 4 21 OV Operating Temperature Range DD 33 REFL 5 20 OGND LTC2251C, LTC2250C ............................. 0C to 70C REFL 6 19 D3 LTC2251I, LTC2250I ...........................40C to 85C V 7 18 D2 DD Storage Temperature Range ..................65C to 125C GND 8 17 D1 QFN PART* 9 10 11 12 13 14 15 16 MARKING 2251 UH PACKAGE 32-LEAD (5mm 5mm) PLASTIC QFN 2250 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: