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LTC1850 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1850 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 28 page  1 LTC1850/LTC1851 18501f 8-Channel, 10-Bit/12-Bit, 1.25Msps Sampling ADCs The 10-bit LTC ®1850 and 12-bit LTC1851 are complete 8-channel data acquisition systems. They include a flex- ible 8-channel multiplexer, a 1.25Msps successive approxi- mation analog-to-digital converter with sample-and-hold, an internal 2.5V reference and reference buffer amplifier, and a parallel output interface. The multiplexer can be con- figured 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 with a sequence of up to 16 addresses and configurations that can be scanned in succession. The sequence memory can also be read back. 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 powered from a separate supply allowing for easy interface to 3V digital logic. Typical power consumption is 40mW at 1.25Msps from a single 5V supply. s Flexible 8-Channel Multiplexer s Single-Ended or Differential Inputs s Two Gain Ranges Plus Unipolar and Bipolar Operation s 1.25Msps Sampling Rate s Single 5V Supply and 40mW Power Dissipation s Scan Mode and Programmable Sequencer s Pin Compatible 10-Bit LTC1850 and 12-Bit LTC1851 s True Differential Inputs Reject Common Mode Noise s Internal 2.5V Reference s Parallel Output Includes MUX Address s Easy Interface to 3V Logic s Nap and Sleep Shutdown Modes s High Speed Data Acquisition s Test and Measurement s Imaging Systems s Telecommunications s Industrial Process Control s Spectrum Analysis FEATURES DESCRIPTIO APPLICATIO S BLOCK DIAGRA 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 1851 BD OVDD REF AMP REFCOMP REFIN REFOUT COM CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0 8-CHANNEL MULTIPLEXER 2.5V REFERENCE INTERNAL CLOCK LTC1851 CONTROL LOGIC AND PROGRAMMABLE SEQUENCER 12-BIT 1.25Msps ADC , LTC and LT are registered trademarks of Linear Technology Corporation. CODE 0 –1.00 –0.50 0.00 0.50 1.00 512 1024 1536 2048 LTC1850/51 G01 2560 3072 3584 4096 Integral Linearity, LTC1851 |
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