LTC2228/LTC2227/LTC2226 12-Bit, 65/40/25Msps Low Power 3V ADCs FEATURES DESCRIPTION n Sample Rate: 65Msps/40Msps/25Msps The LTC 2228/LTC2227/LTC2226 are 12-bit 65Msps/ n Single 3V Supply (2.7V to 3.4V) 40Msps/25Msps, low power 3V A/D converters designed n Low Power: 205mW/120mW/75mW for digitizing high frequency, wide dynamic range signals. n 71.3dB SNR The LTC2228/LTC2227/LTC2226 are perfect for demand- n 90dB SFDR ing imaging and communications applications with AC n No Missing Codes performance that includes 71.3dB SNR and 90dB SFDR n Flexible Input: 1V to 2V Range for signals at the Nyquist frequency. P-P P-P n 575MHz Full Power Bandwidth S/H DC specs include 0.3LSB INL (typ), 0.15LSB DNL (typ) n Clock Duty Cycle Stabilizer and no missing codes over temperature. The transition n Shutdown and Nap Modes noise is a low 0.25LSB . RMS n 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 3.6V 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 performance 25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit) at full speed for a wide range of clock duty cycles. 10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n 32-Pin (5mm 5mm) QFN Package All other trademarks are the property of their respective owners. APPLICATIONS n Wireless and Wired Broadband Communication n Imaging Systems n Ultrasound n Spectral Analysis n Portable Instrumentation TYPICAL APPLICATION LTC2228: SNR vs Input Frequency, 1dB, 2V Range, 65Msps 72 REFH FLEXIBLE REFERENCE REFL OV DD 71 D11 + 12-BIT CORRECTION ANALOG OUTPUT INPUT PIPELINED LOGIC INPUT DRIVERS 70 S/H ADC CORE D0 OGND 69 CLOCK/DUTY CYCLE CONTROL 68 100 0 50 150 200 222876 TA01 INPUT FREQUENCY (MHz) 2228 G09 CLK 222876fb 1 SNR (dBFS)LTC2228/LTC2227/LTC2226 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION OV = V (Notes 1, 2) DD DD Supply Voltage (V ) ..................................................4V TOP VIEW DD Digital Output Ground Voltage (OGND) ........ 0.3V to 1V Analog Input Voltage (Note 3) .......0.3V to (V + 0.3V) DD 32 31 30 29 28 27 26 25 + Digital Input Voltage ......................0.3V to (V + 0.3V) A 1 24 D8 DD IN Digital Output Voltage ................ 0.3V to (OV + 0.3V) A 2 23 D7 IN DD REFH 3 22 D6 Power Dissipation .............................................1500mW REFH 4 21 OV DD Operating Temperature Range 33 REFL 5 20 OGND LTC2228C, LTC2227C, LTC2226C............. 0C to 70C REFL D5 6 19 LTC2228I, LTC2227I, LTC2226I ............ 40C to 85C V 7 18 D4 DD Storage Temperature Range ................... 65C to 125C GND 8 17 D3 9 10 11 12 13 14 15 16 UH PACKAGE 32-LEAD (5mm s 5mm) PLASTIC QFN T = 125C, = 34C/W JMAX JA EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2228CUH PBF LTC2228CUH TRPBF 2228 0C to 70C 32-Lead (5mm 5mm) Plastic QFN LTC2228IUH PBF LTC2228IUH TRPBF 2228 32-Lead (5mm 5mm) Plastic QFN 40C to 85C LTC2227CUH PBF LTC2227CUH TRPBF 2227 32-Lead (5mm 5mm) Plastic QFN 0C to 70C LTC2227IUH PBF LTC2227IUH TRPBF 2227 40C to 85C 32-Lead (5mm 5mm) Plastic QFN LTC2226CUH PBF LTC2226CUH TRPBF 2226 0C to 70C 32-Lead (5mm 5mm) Plastic QFN LTC2226IUH PBF LTC2226IUH TRPBF 2226 40C to 85C 32-Lead (5mm 5mm) Plastic QFN LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2228CUH LTC2228CUH TR 2228 32-Lead (5mm 5mm) Plastic QFN 0C to 70C LTC2228IUH LTC2228IUH TR 2228 40C to 85C 32-Lead (5mm 5mm) Plastic QFN LTC2227CUH LTC2227CUH TR 2227 0C to 70C 32-Lead (5mm 5mm) Plastic QFN LTC2227IUH LTC2227IUH TR 2227 40C to 85C 32-Lead (5mm 5mm) Plastic QFN LTC2226CUH LTC2226CUH TR 2226 32-Lead (5mm 5mm) Plastic QFN 0C to 70C LTC2226IUH LTC2226IUH TR 2226 32-Lead (5mm 5mm) Plastic QFN 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. For more information on lead free part marking, go to: