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LTC2355-14 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2355-14 Datasheet(HTML) 1 Page - Linear Technology |
1 / 18 page LTC2356-12/LTC2356-14 1 2356fb BLOCK DIAGRAM FEATURES APPLICATIONS DESCRIPTION Serial 12-Bit/14-Bit, 3.5Msps Sampling ADCs with Shutdown The LTC®2356-12/LTC2356-14 are 12-bit/14-bit, 3.5Msps serial ADCs with differential inputs. The devices draw only 5.5mA from a single 3.3V supply and come in a tiny 10-lead MSOP package. A Sleep shutdown feature further reduces power consumption to 13µW. The com- bination of speed, low power and tiny package makes the LTC2356-12/LTC2356-14suitableforhighspeed,portable applications. The80dBcommonmoderejectionallowsuserstoeliminate ground loops and common mode noise by measuring signals differentially from the source. The devices convert –1.25V to 1.25V bipolar inputs differentially. The absolute voltage swing for AIN+ and AIN– extends from ground to the supply voltage. Theserialinterfacesendsouttheconversionresultsduring the 16 clock cycles following a CONV rising edge for com- patibility with standard serial interfaces. If two additional clock cycles for acquisition time are allowed after the data stream in between conversions, the full sampling rate of 3.5Msps can be achieved with a 63MHz 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. n 3.5Msps Conversion Rate n 74.1dB SINAD at 14-Bits, 71.1dB SINAD at 12-Bits n Low Power Dissipation: 18mW n 3.3V Single Supply Operation n 2.5V Internal Bandgap Reference can be Overdriven n 3-Wire SPI-Compatible Serial Interface n Sleep (13µW) Shutdown Mode n Nap (4mW) Shutdown Mode n 80dB Common Mode Rejection n ±1.25V Bipolar Input Range n Tiny 10-Lead MSOP Package n Communications n Data Acquisition Systems n Uninterrupted Power Supplies n Multiphase Motor Control n Multiplexed Data Acquisition n RFID THD, 2nd and 3rd vs Input Frequency for Differential Input Signals 2356 BD – + 1 2 7 3 4 S & H GND EXPOSED PAD LTC2356-14 VREF 10µF AIN– AIN+ 14-BIT ADC 3.3V 10µF 14 8 10 9 THREE- STATE SERIAL OUTPUT PORT 2.5V REFERENCE TIMING LOGIC VDD SDO CONV SCK 5 6 11 FREQUENCY (MHz) 0.1 –80 –74 –68 –62 –56 1 10 100 2356 G02 –86 –92 –98 –104 –50 THD 2nd 3rd |
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