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LTC1853 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1853 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  LTC1852/LTC1853 1 18523fa BLOCK DIAGRAM FEATURES APPLICATIONS DESCRIPTION 8-Channel, 10-Bit/12-Bit, 400ksps, Low Power, Sampling ADCs The 10-bit LTC®1852 and 12-bit LTC1853 are complete 8-channel data acquisition systems. They include a flexible 8-channel multiplexer, a 400ksps successive approxima- tion analog-to-digital converter, an internal reference and a parallel output interface. The multiplexer can be configured for single-ended or differential inputs, two gain ranges and unipolar or bipolar operation. The ADCs have a scan mode that will repeatedly cycle through all 8 multiplexer channels and can also be programmed to sequence through up to 16 addresses and configurations. The sequence can also be read back from internal memory. The reference and buffer amplifier provide pin strappable ranges of 4.096V, 2.5V and 2.048V. The parallel output includes the 10-bit or 12-bit conversion result plus the 4-bit multiplexer address. The digital outputs are pow- ered from a separate supply allowing for easy interface to 3V digital logic. Typical power consumption is 10mW at 400ksps from a single 5V supply and 3mW at 250ksps from a single 3V supply. n Flexible 8-Channel Multiplexer Single-Ended or Differential Inputs Two Gain Ranges Unipolar or Bipolar Operation n Scan Mode and Programmable Sequencer Eliminate Configuration Software Overhead n Low Power: 3mW at 250ksps n 2.7V to 5.5V Supply Range n Internal or External Reference Operation n Parallel Output Includes MUX Address n Nap and Sleep Shutdown Modes n Pin Compatible up-grade 1.25Msps 10-Bit LTC1850 and 12-Bit LTC1851 n High Speed Data Acquisition n Test and Measurement n Imaging Systems n Telecommunications n Industrial Process Control n Spectrum Analysis BUSY DIFFOUT/S6 A2OUT/S5 A1OUT/S4 A0OUT/S3 D11/S2 D10/S1 D9/S0 D8 D7 D6 D5 D4 D3 D2 D1 D0 M1 SHDN CS CONVST RD WR DIFF A2 A1 A0 UNI/BIP PGA M0 OUTPUT DRIVERS DATA LATCHES OGND 18523 BD OVDD REF AMP REFCOMP REFIN REFOUT COM CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0 8-CHANNEL MULTIPLEXER 2.5V REFERENCE INTERNAL CLOCK LTC1853 CONTROL LOGIC AND PROGRAMMABLE SEQUENCER 12-BIT SAMPLING ADC + – Integral Linearity 0 512 1024 1536 2048 2560 3072 3584 4096 CODE 1.0 0.5 0 –0.5 –1.0 1852 F01 , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. |
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