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LTC1410 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1410 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page 1 LTC1410 12-Bit, 1.25Msps Sampling A/D Converter with Shutdown S FEATURE DESCRIPTIO The LTC ®1410 is a 0.65 µs, 1.25Msps, 12-bit sampling A/D converter that draws only 160mW from ±5V supplies. This easy-to-use device includes a high dynamic range sample-and-hold, a precision reference and requires no external components. Two digitally selectable power shut- down modes provide flexibility for low power systems. The LTC1410’s full-scale input range is ±2.5V. Maximum DC specifications include ±1LSB INL and ±1LSB DNL over temperature. Outstanding AC performance includes 71dB S/(N + D) and 82dB THD at the Nyquist input frequency of 625kHz. 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, 12-bit parallel output port. There is no pipeline delay in the conversion results. A separate convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors. s 1.25Msps Sample Rate s Power Dissipation: 160mW s 71dB S/(N + D) and 82dB THD at Nyquist s No Pipeline Delay s Nap (7mW) and Sleep (10 µW) Shutdown Modes s Operates with Internal 15ppm/ °C Reference or External Reference s True Differential Inputs Reject Common Mode Noise s 20MHz Full Power Bandwidth Sampling s ±2.5V Bipolar Input Range s 28-Pin SO Wide Package 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 Complete 1.25MHz, 12-Bit Sampling A/D Converter Effective Bits and Signal-to-(Noise + Distortion) vs Input Frequency INPUT FREQUENCY (Hz) 2 4 6 8 10 10k 100k 1M 10M LTC1410 • TA02 0 1k 12 74 68 62 56 50 fSAMPLE = 1.25MHz NYQUIST 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 LTC1410 0.1 µF + 10 µF DIFFERENTIAL ANALOG INPUT (–2.5V TO 2.5V) 2.50V VREF OUTPUT 10 µF 10 µF 0.1 µF 0.1 µF –5V 5V 12-BIT PARALLEL BUS µP CONTROL LINES 1410 TA01 + +AIN –AIN VREF REFCOMP AGND D11(MSB) D10 D9 D8 D7 D6 D5 D4 DGND AVDD DVDD VSS BUSY CS CONVST RD SHDN NAP/SLP OGND D0 D1 D2 D3 |
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