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LTC1746 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1746 Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page 1 LTC1746 1746f APPLICATIO S FEATURES DESCRIPTIO BLOCK DIAGRA Low Power,14-Bit, 25Msps ADC s Sample Rate: 25Msps s 77.5dB SNR and 91dB SFDR (3.2V Range) s 74dB SNR and 96dB SFDR (2V Range) s No Missing Codes s Single 5V Supply s Low Power Dissipation: 390mW s Selectable Input Ranges: ±1V or ±1.6V s 240MHz Full Power Bandwidth S/H s Pin Compatible Family 25 Msps: LTC1746 (14-Bit), LTC1745 (12-Bit) 50 Msps: LTC1744 (14-Bit), LTC1743 (12-Bit) 65 Msps: LTC1742 (14-Bit), LTC1741 (12-Bit) 80 Msps: LTC1748 (14-Bit), LTC1747 (12-Bit) s Telecommunications s Medical Imaging s Receivers s Base Stations s Spectrum Analysis s Imaging Systems , LTC and LT are registered trademarks of Linear Technology Corporation. The LTC ®1746 is a 25Msps, sampling 14-bit A/D con- verter designed for digitizing high frequency, wide dy- namic range signals. Pin selectable input ranges of ±1V and ±1.6V along with a resistor programmable mode allow the LTC1746’s input range to be optimized for a wide variety of applications. The LTC1746 is perfect for demanding communications applications with AC performance that includes 77.5dB SNR and 91dB spurious free dynamic range. Ultralow jitter of 0.3psRMS allows undersampling with excellent noise performance. DC specs include ±3LSB INL maximum and no missing codes 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 digital output power supply can be operated from 0.5V to 5V, making it easy to connect directly to low voltage DSPs or FIFOs. The TSSOP package with a flow-through pinout simplifies the board layout. 25Msps, 14-Bit ADC with a ±1V Differential Input Range 14-BIT PIPELINED ADC 14 S/H AMP ±1V DIFFERENTIAL ANALOG INPUT AIN + AIN – SENSE VCM 4.7 µF DIFF AMP REFLA REFHB GND 1746 BD ENC 4.7 µF 1 µF1µF 0.1 µF 0.1 µF REFHA REFLB BUFFER RANGE SELECT 2.35VREF OUTPUT LATCHES CONTROL LOGIC OVDD VDD OGND 0.5V TO 5V 5V 0.1 µF 1 µF 1 µF 1 µF D13 D0 CLKOUT OF • • • ENC DIFFERENTIAL ENCODE INPUT OE MSBINV 0.1 µF |
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Similar Description - LTC1746_15 |
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