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LTC2356-12 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2356-12 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page 1 LTC2356-12/LTC2356-14 2356f 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 13 µW. The combination of speed, low power and tiny package makes the LTC2356-12/ LTC2356-14 suitable for high speed, portable applications. The 80dB common mode rejection allows users to elimi- nate ground loops and common mode noise by measuring signals differentially from the source. The devices convert –1.25V to 1.25V bipolar inputs differ- entially. The absolute voltage swing for AIN+ and AIN– extends from ground to the supply voltage. The serial interface sends out the conversion results during the 16 clock cycles following a CONV rising edge for compatibility with standard serial interfaces. If two addi- tional 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. APPLICATIO S FEATURES DESCRIPTIO BLOCK DIAGRA Serial 12-Bit/14-Bit, 3.5Msps Sampling ADCs with Shutdown ■ 3.5Msps Conversion Rate ■ 74.1dB SINAD at 14-Bits, 71.1dB SINAD at 12-Bits ■ Low Power Dissipation: 18mW ■ 3.3V Single Supply Operation ■ 2.5V Internal Bandgap Reference can be Overdriven ■ 3-Wire SPI-Compatible Serial Interface ■ Sleep (13 µW) Shutdown Mode ■ Nap (4mW) Shutdown Mode ■ 80dB Common Mode Rejection ■ ±1.25V Bipolar Input Range ■ Tiny 10-Lead MSOP Package ■ Communications ■ Data Acquisition Systems ■ Uninterrupted Power Supplies ■ Multiphase Motor Control ■ Multiplexed Data Acquisition ■ RFID THD, 2nd and 3rd vs Input Frequency for Differential Input Signals FREQUENCY (MHz) 0.1 –80 –74 –68 –62 –56 1 10 100 2356 G02 –86 –92 –98 –104 –50 THD 2nd 3rd , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 2356 BD – + 1 2 7 3 4 S & H GND EXPOSED PAD LTC2356-14 VREF 10 µF AIN – AIN + 14-BIT ADC 3.3V 10 µF 14 8 10 9 THREE- STATE SERIAL OUTPUT PORT 2.5V REFERENCE TIMING LOGIC VDD SDO CONV SCK 5 6 11 |
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