LTC2321-14 Dual, 14-Bit + Sign, 2Msps Differential Input ADC with Wide Input Common Mode Range Fea T Descrip T n 2Msps Throughput Rate The LTC 2321-14 is a low noise, high speed dual 14-bit + n 1LSB INL (Typ) sign successive approximation register (SAR) ADC with n Guaranteed 14-Bit, No Missing Codes differential inputs and wide input common mode range. n 8V Differential Inputs with Wide Input Common Operating from a single 3.3V or 5V supply, the LTC2321- P-P Mode Range 14 has an 8V differential input range, making it ideal P-P n 80dB SNR (Typ) at f = 500kHz for applications which require a wide dynamic range with IN n 90dB THD (Typ) at f = 500kHz high common mode rejection. The LTC2321-14 achieves IN n No-Cycle Latency 1LSB INL typical, no missing codes at 14 bits and 80dB n Guaranteed Operation to 125C SNR. n Single 3.3V or 5V Supply The LTC2321-14 has an onboard low drift (20ppm/C max) n Low Drift (20ppm/C Max) 2.048V or 4.096V Internal 2.048V or 4.096V temperature-compensated reference. Reference The LTC2321-14 also has a high speed SPI-compatible n 1.8V to 2.5V I/O Voltages serial interface that supports CMOS or LVDS. The fast n CMOS or LVDS SPI-Compatible Serial I/O 2Msps per channel throughput with no-cycle latency n Power Dissipation 33mW/Ch (Typ) makes the LTC2321-14 ideally suited for a wide variety of n Small 28-Lead (4mm 5mm) QFN Package high speed applications. The LTC2321-14 dissipates only 33mW per channel and offers nap and sleep modes to a T reduce the power consumption to 5W for further power savings during inactive periods. n High Speed Data Acquisition Systems n Communications 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 Remote Data Acquisition n Imaging n Optical Networking n Automotive n Multiphase Motor Control Typical a T 32k Point FFT f = 2Msps, f = 500kHz S IN 3.3V OR 5V 0 SNR = 80.2dB DIFFERENTIAL INPUTS 10F NO CONFIGURATION REQUIRED THD = 92.5dB 20 + IN , IN SINAD = 79.9dB V REFOUT1 DD SFDR = 98.6dB INSTRUMENTATION DIFFERENTIAL 10F 40 25 VBYP1 A + IN1 1F LTC2321-14 60 REFOUT2 0V 0V 10F 220pF 80 VBYP2 1F BIPOLAR UNIPOLAR 25 100 A SDO1 IN1 TO CONTROL A + SDO2 IN2 LOGIC A CLKOUT 120 IN2 (FPGA, CPLD, CMOS/LVDS SCK DSP, ETC.) 0V 0V V DD REFINT CNV 140 GND OGND OV 1.8V TO 2.5V DD 0.2 0.4 0 0.6 0.8 1.0 1F FREQUENCY (MHz) 232114 TA01a 232114 TA01b 232114fc 1 For more information www.linear.com/LTC2321-14 AMPLITUDE (dBFS) ion pplica ions pplica ion uresLTC2321-14 a Te Maxi Mu M r a T p in c F T (Notes 1, 2) TOP VIEW Supply Voltage (V ) ..................................................6V DD Supply Voltage (OV ) ................................................3V DD Supply Bypass Voltage (V , V ) .......................3V BYP1 BYP2 28 27 26 25 24 23 Analog Input Voltage V 1 22 SCK DD A +, A (Note 3) ................... 0.3V to (V + 0.3V) IN IN DD + A + 2 21 SCK IN2 REFOUT1,2 ............................0.3V to (V + 0.3V) DD A 3 20 SDO2 IN2 CNV (Note 15) .......................... 0.3V to (V + 0.3V) DD 29 + GND 4 19 SDO2 GND Digital Input Voltage GND 5 18 CLKOUT (Note 3) .......................... (GND 0.3V) to (OV + 0.3V) + A 6 17 DD CLKOUT IN1 7 16 Digital Output Voltage .... (GND 0.3V) to (OV + 0.3V) A + SDO1 IN1 DD + V 8 15 SDO1 DD Power Dissipation ...............................................200mW 9 10 11 12 13 14 Operating Temperature Range LTC2321C ................................................ 0C to 70C LTC2321I..............................................40C to 85C UFD PACKAGE LTC2321H .......................................... 40C to 125C 28-LEAD (4mm 5mm) PLASTIC QFN Storage Temperature Range .................. 65C to 150C T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB o r Der i n F Ma T