LTC2323-12 Dual, 12-Bit + Sign, 5Msps Differential Input ADC with Wide Input Common Mode Range FEATURES DESCRIPTION n 5Msps Throughput Rate The LTC 2323-12 is a low noise, high speed dual n 0.5LSB INL (Typ) 12-bit + sign successive approximation register (SAR) n Guaranteed 12-Bit, No Missing Codes ADC with differential inputs and wide input common mode n 8V Differential Inputs with Wide Input Common range. Operating from a single 3.3V or 5V supply, the P-P Mode Range LTC2323-12 has an 8V differential input range, making P-P n 73dB SNR (Typ) at f = 2MHz it ideal for applications which require a wide dynamic IN n 85dB THD (Typ) at f = 2MHz range with high common mode rejection. The LTC2323- IN n Guaranteed Operation to 125C 12 achieves 0.5LSB INL typical, no missing codes at 12 n Single 3.3V or 5V Supply bits and 73dB SNR. n Low Drift (20ppm/C Max) 2.048V or 4.096V Internal The LTC2323-12 has an onboard low drift (20ppm/C max) Reference 2.048V or 4.096V temperature-compensated reference. n 1.8V to 2.5V I/O Voltages The LTC2323-12 also has a high speed SPI-compatible n CMOS or LVDS SPI-Compatible Serial I/O serial interface that supports CMOS or LVDS. The fast n Power Dissipation 38mW/Ch (Typ) 5Msps per channel throughput with one-cycle latency n Small 28-Lead (4mm 5mm) QFN Package makes the LTC2323-12 ideally suited for a wide variety of high speed applications. The LTC2323-12 dissipates only APPLICATIONS 38mW per channel and offers nap and sleep modes to n reduce the power consumption to 5W for further power High Speed Data Acquisition Systems n savings during inactive periods. Communications n Remote Data Acquisition L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. n Imaging n Optical Networking n Automotive n Multiphase Motor Control TYPICAL APPLICATION 16k Point FFT f = 5Msps, f = 2.2MHz S IN DIFFERENTIAL INPUTS 3.3V OR 5V NO CONFIGURATION REQUIRED 0 SNR = 73dBFS + 10F IN , IN THD = 86dB 20 SINAD = 72.8dB INSTRUMENTATION DIFFERENTIAL V REFOUT1 DD SFDR = 88dB 25 10F A + IN1 VBYP1 40 1F LTC2323-12 0V 0V REFOUT2 220pF 60 10F VBYP2 1F BIPOLAR UNIPOLAR 80 25 A SDO1 IN1 TO CONTROL A + SDO2 IN2 LOGIC 100 A CLKOUT IN2 (FPGA, CPLD, 0V 0V CMOS/LVDS SCK DSP, ETC.) V DD REFINT CNV 120 GND OGND OV 1.8V TO 2.5V DD 0 0.5 1 1.5 2 2.5 1F FREQUENCY (MHz) 232312 TA01b 232312 TA01a 232312fb 1 For more information www.linear.com/LTC2323-12 AMPLITUDE (dBFS)LTC2323-12 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) Supply Voltage (V ) ..................................................6V DD TOP VIEW Supply Voltage (OV ) ................................................3V DD Supply Bypass Voltage (V , V ) .......................3V BYP1 BYP2 Analog Input Voltage 28 27 26 25 24 23 A +, A (Note 3) ................... 0.3V to (V + 0.3V) IN IN DD V 1 22 SCK DD REFOUT1,2 ............................0.3V to (V + 0.3V) DD + A + 2 21 SCK IN2 CNV (Note 15) .......................... 0.3V to (V + 0.3V) DD A 3 20 SDO2 IN2 29 + Digital Input Voltage GND 4 19 SDO2 GND GND 5 18 CLKOUT (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) DD + A 6 17 CLKOUT IN1 Digital Output Voltage A + 7 16 SDO1 IN1 (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) DD + V 8 15 SDO1 DD Power Dissipation ...............................................200mW 9 10 11 12 13 14 Operating Temperature Range LTC2323C ................................................ 0C to 70C LTC2323I .............................................40C to 85C UFD PACKAGE LTC2323H .......................................... 40C to 125C 28-LEAD (4mm 5mm) PLASTIC QFN T = 125C, = 43C/W Storage Temperature Range .................. 65C to 150C JMAX JA EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION