LTC1403-1/LTC1403A-1 Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown FEATURES DESCRIPTION n The LTC 1403-1/LTC1403A-1 are 12-bit/14-bit, 2.8Msps 2.8Msps Conversion Rate n serial ADCs with differential inputs. The devices draw only Low Power Dissipation: 14mW n 4.7mA from a single 3V supply and come in a tiny 10-lead 3V Single Supply Operation n MSE package. A Sleep shutdown feature lowers power 2.5V Internal Bandgap Reference Can Be Overdriven n consumption to 10W. The combination of speed, low 3-Wire Serial Interface n power and tiny package makes the LTC1403-1/LTC1403A-1 Sleep (10W) Shutdown Mode n suitable for high speed, portable applications. Nap (3mW) Shutdown Mode n 80dB Common Mode Rejection The 80dB common mode rejection allows users to eliminate n 1.25V Bipolar Input Range ground loops and common mode noise by measuring n Tiny 10-Lead MSE Package signals differentially from the source. The devices convert 1.25V to 1.25V bipolar inputs + differentially. The absolute voltage swing for A and APPLICATIONS IN A extends from ground to the supply voltage. IN n Communications The serial interface sends out the conversion results during n Data Acquisition Systems the 16 clock cycles following CONV for compatibility with n Uninterrupted Power Supplies standard serial interfaces. If two additional clock cycles n Multiphase Motor Control for acquisition time are allowed after the data stream in n Multiplexed Data Acquisition between conversions, the full sampling rate of 2.8Msps can be achieved with a 50.4MHz clock. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. BLOCK DIAGRAM THD, 2nd and 3rd vs Input 10F 3V Frequency for Differential Input Signals 44 7 V LTC1403A-1 DD 50 56 + A THREE- IN + 1 STATE 62 S & H 14-BIT ADC 8 SDO SERIAL 68 OUTPUT A IN 2 PORT 74 THD 3rd 14 80 V REF 86 3 10 CONV 2nd 2.5V TIMING 92 10F REFERENCE LOGIC GND 98 4 9 SCK 104 14031 TA01a 5 6 11 0.1 1 10 100 EXPOSED PAD FREQUENCY (MHz) 14031 TA01b 14031fd 1 For more information www.linear.com/LTC1403-1 14-BIT LATCH THD, 2nd, 3rd (dB)LTC1403-1/LTC1403A-1 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) Supply Voltage (V ) .................................................4V DD Analog Input Voltage TOP VIEW + 10 CONV (Note 3) ...................................0.3V to (V + 0.3V) A 1 IN DD 9 SCK A 2 IN Digital Input Voltage .................. 0.3V to (V + 0.3V) 11 8 SDO DD V 3 REF 7 V GND 4 DD Digital Output Voltage ..................0.3V to (V + 0.3V) DD 6 GND GND 5 Power Dissipation ...............................................100mW MSE PACKAGE 10-LEAD PLASTIC MSOP Operation Temperature Range T = 125C, = 40C/ W LTC1403C-1/LTC1403AC-1 ....................... 0C to 70C JMAX JA EXPOSED PAD (PIN 11) IS GND MUST BE SOLDERED TO PCB LTC1403I-1/LTC1403AI-1 .....................40C to 85C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C