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LTC1743CFW Datasheet(PDF) 1 Page - Linear Technology |
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LTC1743CFW Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  1 LTC1743 1743f 12-Bit, 50Msps ADC s Sample Rate: 50Msps s 72.5dB SNR and 85dB SFDR (3.2V Range) s 71dB SNR and 90dB SFDR (2V Range) s No Missing Codes s Single 5V Supply s Power Dissipation: 1000mW s Selectable Input Ranges: ±1V or ±1.6V s 150MHz Full Power Bandwidth S/H s Pin Compatible Family 25Msps: LTC1746 (14-Bit), LTC1745 (12-Bit) 50Msps: LTC1744 (14-Bit), LTC1743 (12-Bit) 65Msps: LTC1742 (14-Bit), LTC1741 (12-Bit) 80Msps: LTC1748 (14-Bit), LTC1747 (12-Bit) s 48-Pin TSSOP Package s Telecommunications s Receivers s Cellular Base Stations s Spectrum Analysis s Imaging Systems APPLICATIO S , LTC and LT are registered trademarks of Linear Technology Corporation. BLOCK DIAGRA 12-BIT PIPELINED ADC 12 S/H AMP ±1V DIFFERENTIAL ANALOG INPUT AIN + AIN – SENSE VCM 4.7 µF DIFF AMP REFLA REFHB GND 1743 BD ENC 4.7 µF 1 µF1µF 0.1 µF 0.1 µF REFHA REFLB BUFFER RANGE SELECT 2.5VREF OUTPUT LATCHES CONTROL LOGIC OVDD VDD OGND 0.5V TO 5V 5V 0.1 µF 1 µF 1 µF 1 µF D11 D0 CLKOUT OF • • • ENC DIFFERENTIAL ENCODE INPUT OE MSBINV 0.1 µF The LTC ®1743 is a 50Msps, sampling 12-bit A/D con- verter designed for digitizing high frequency, wide dynamic range signals. Pin selectable input ranges of ±1V and ±1.6V along with a resistor programmable mode allow the LTC1743’s input range to be optimized for a wide variety of applications. The LTC1743 is perfect for demanding communications applications with AC performance that includes 72.5dB SNR and 85dB spurious free dynamic range. Ultralow jitter of 0.3psRMS allows undersampling of IF frequencies with excellent noise performance. DC specs include ±1LSB maximum INL and ±0.8LSB DNL over temperature. The digital interface is compatible with 5V, 3V and 2V logic systems. The ENC and ENC inputs may be driven differen- tially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gain ENC and ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate output power supply can be operated from 0.5V to 5V, making it easy to connect directly to any low voltage DSPs or FIFOs. The 48-pin TSSOP package with a flow-through pinout simplifies the board layout. 50Msps, 12-Bit ADC with a 2V Differential Input Range FEATURES DESCRIPTIO |
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