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LTC1415CSW Datasheet(PDF) 1 Page - Linear Technology |
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LTC1415CSW Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  1 LTC1415 12-Bit, 1.25Msps, 55mW Sampling A/D Converter APPLICATI TYPICAL 1.25MHz, 12-Bit Sampling A/D Converter , LTC and LT are registered trademarks of Linear Technology Corporation. Effective Bits and Signal-to-(Noise + Distortion) vs Input Frequency S FEATURE s 1.25Msps Sample Rate s Single 5V Supply s Power Dissipation: 55mW s Nap and Sleep Power Shutdown Modes s ±0.35LSB INL and ±0.25LSB DNL s 72dB S/(N + D) and 80dB THD at 100kHz s External or Internal Reference Operation s True Differential Inputs Reject Common Mode Noise s Input Range: 4.096V (1mV/LSB) s 28-Pin SSOP and SO Packages DESCRIPTIO The LTC ®1415 is a 700ns, 1.25Msps, 12-bit sampling A/D converter that draws only 55mW from a single 5V supply. This easy-to-use device includes a high dynamic range sample-and-hold, precision reference and a trimmed internal clock. Two power shutdown modes provide flex- ibility for low power systems. The LTC1415’s full-scale input range is 4.096V. Low linearity errors ±0.35LSB INL, ±0.25LSB DNL make it ideal for imaging systems. Outstanding AC performance includes 72dB S/(N + D) and 80dB THD with an input frequency of 100kHz. The unique differential input sample-and-hold can acquire single-ended or differential input signals up to its 18MHz bandwidth. The 60dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source. The ADC has a µP compatible, 12-bit parallel output port. There is no pipeline delay in the conversion results. A separate convert start input and data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors. A separate output logic supply pin allows direct connection to 3V components. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 +AIN –AIN VREF REFCOMP AGND D11(MSB) D10 D9 D8 D7 D6 D5 D4 DGND AVDD DVDD OVDD BUSY CS CONVST RD SHDN NAP/SLP OGND D0 D1 D2 D3 LTC1415 10 µF DIFFERENTIAL ANALOG INPUT (0V TO 4.096V) 2.50V VREF OUTPUT 10 µF 5V 12-BIT PARALLEL BUS µP CONTROL LINES 1415 TA01 OUTPUT LOGIC SUPPLY 3V OR 5V INPUT FREQUENCY (Hz) 1k 12 11 10 9 8 7 6 5 4 3 2 1 0 74 68 62 56 10k 100k LTC1415 • TA02 1M 2M NYQUIST FREQUENCY fSAMPLE = 1.25Msps S APPLICATI s High Speed Data Acquisition s Imaging Systems s Digital Signal Processing s Multiplexed Data Acquisition Systems s Telecommunications |
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