LTC1403/LTC1403A Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown Features Description n 2.8Msps Conversion Rate The LTC 1403/LTC1403A are 12-bit/14-bit, 2.8Msps se- n Low Power Dissipation: 14mW rial ADCs with differential inputs. The devices draw only n 3V Single Supply Operation 4.7mA from a single 3V supply and come in a tiny 10-lead n 40C to 125C Guaranteed Operation MS package. A Sleep shutdown feature lowers power n 2.5V Internal Bandgap Reference can be Overdriven consumption to 10W. The combination of speed, low n 3-Wire Serial Interface power and tiny package makes the LTC1403/LTC1403A n Sleep (10W) Shutdown Mode suitable for high speed, portable applications. n Nap (3mW) Shutdown Mode The 80dB common mode rejection allows users to eliminate n 80dB Common Mode Rejection ground loops and common mode noise by measuring n 0V to 2.5V Unipolar Input Range signals differentially from the source. n Tiny 10-Lead MS Package The devices convert 0V to 2.5V unipolar inputs differentially. The absolute voltage swing for +A and A extends from IN IN a ground to the supply voltage. n Automotive The serial interface sends out the conversion results during n Communications the 16 clock cycles following CONV for compatibility with n Data Acquisition Systems standard serial interfaces. If two additional clock cycles n Uninterrupted Power Supplies for acquisition time are allowed after the data stream in n Multiphase Motor Control between conversions, the full sampling rate of 2.8Msps n Multiplexed Data Acquisition can be achieved with a 50.4MHz clock. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and LinearView and SoftSpan are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Block Diagram 2nd, 3rd and SFDR vs 10F 3V Input Frequency 44 7 V LTC1403A DD 50 56 + A THREE- THD 2nd, SFDR IN 1 + 62 STATE S & H 14-BIT ADC 8 SDO SERIAL 68 OUTPUT A IN 2 PORT 74 3rd 14 80 V 86 REF 3 10 CONV 92 2.5V TIMING 10F REFERENCE LOGIC 98 GND 4 9 SCK 104 1403A TA01 0.1 1 10 100 5 6 11 EXPOSED PAD FREQUENCY (MHz) 1403A TA02 1403fc 1 For more information www.linear.com/LTC1403 14-BIT LATCH THD, 2nd, SFDR, 3rd (dB) pplicationsLTC1403/LTC1403A aB solute m aximum r p in c F (Note 1, 2,) TOP VIEW Supply Voltage (V ) ..................................................4V DD + A 1 10 CONV IN Analog Input Voltage A 2 9 SCK IN 11 V 3 8 SDO REF GND (Note 3) ................................... 0.3V to (V + 0.3V) DD GND 4 7 V DD GND 5 6 GND Digital Input Voltage..................... 0.3V to (V + 0.3V) DD MSE PACKAGE Digital Output Voltage .................. 0.3V to (V + 0.3V) DD 10-LEAD PLASTIC MSOP Power Dissipation ...............................................100mW T = 150C, q = 40C/W JMAX JA EXPOSED PAD (PIN 11) IS GND Operation Temperature Range MUST BE SOLDERED TO PCB LTC1403C/LTC1403AC ............................. 0C to 70C LTC1403I/LTC1403AI ...........................40C to 85C LTC1403H/LTC1403AH ...................... 40C to 125C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C o r Der i n F