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LTC1419CG Datasheet(PDF) 1 Page - Linear Technology |
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LTC1419CG Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page 1 LTC1419 14-Bit, 800ksps Sampling A/D Converter with Shutdown S FEATURE s Sample Rate: 800ksps s Power Dissipation: 150mW s 81.5dB S/(N + D) and 93dB THD s No Missing Codes s No Pipeline Delay s Nap and Sleep Shutdown Modes s Operates with 2.5V Internal 15ppm/ °C Reference or External Reference s True Differential Inputs Reject Common Mode Noise s 20MHz Full-Power Bandwidth Sampling s Bipolar Input Range: ±2.5V s 28-Pin SSOP and SO Packages DESCRIPTIO The LTC ®1419 is a 1 µs, 800ksps, 14-bit sampling A/D converter that draws only 150mW from ±5V supplies. This easy-to-use device includes a high dynamic range sample-and-hold and a precision reference. Two digitally selectable power shutdown modes provide flexibility for low power systems. The LTC1419 has a full-scale input range of ±2.5V. Out- standing AC performance includes 81.5dB S/(N + D) and 93dB THD with a 100kHz input; 80dB S/(N + D) and 86dB THD at the Nyquist input frequency of 400kHz. The unique differential input sample-and-hold can acquire single-ended or differential input signals up to its 20MHz 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, 14-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. S APPLICATI s Telecommunications s Digital Signal Processing s Multiplexed Data Acquisition Systems s High Speed Data Acquisition s Spectrum Analysis s Imaging Systems , LTC and LT are registered trademarks of Linear Technology Corporation. APPLICATI TYPICAL 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 D13(MSB) D12 D11 D10 D9 D8 D7 D6 DGND AVDD DVDD VSS BUSY CS CONVST RD SHDN D0 D1 D2 D3 D4 D5 LTC1419 10 µF 1 µF DIFFERENTIAL ANALOG INPUT (–2.5V TO 2.5V) 10 µF 10 µF –5V 5V 14-BIT PARALLEL BUS µP CONTROL LINES 1419 TA01 VREF OUTPUT 2.50V 800kHz, 14-Bit Sampling A/D Converter INPUT FREQUENCY (Hz) 10k 100k 1M 2M 1419 TA02 1k 14 13 12 11 10 9 8 7 6 5 4 3 2 86 80 74 68 62 fSAMPLE = 800kHz Effective Bits and Signal-to-(Noise + Distortion) vs Input Frequency |
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