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LTC6652 Datasheet(PDF) 1 Page - Linear Technology |
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LTC6652 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 50 page  LTC2373-18 1 237318f For more information www.linear.com/LTC2373-18 Typical applicaTion FeaTures DescripTion 18-Bit, 1Msps, 8-Channel SAR ADC with 100dB SNR applicaTions The LTC®2373-18 is a low noise, high speed, 8-channel 18-bitsuccessiveapproximationregister(SAR)ADC.Oper- atingfromasingle5Vsupply,theLTC2373-18hasahighly configurable, low crosstalk 8-channel input multiplexer, supporting fully differential, pseudo-differential unipolar and pseudo-differential bipolar analog input ranges. The LTC2373-18 achieves ±2.75LSB INL (maximum) in all input ranges, no missing codes at 18-bits and 100dB (fully differential)/ 95dB (pseudo-differential) SNR (typical). TheLTC2373-18hasanonboardlowdrift(20ppm/°Cmax) 2.048V temperature-compensated reference and a single- shot capable reference buffer. The LTC2373-18 also has a high speed SPI-compatible serial interface that supports 1.8V, 2.5V, 3.3V and 5V logic through which a sequencer with a depth of 16 may be programmed. An internal os- cillator sets the conversion time, easing external timing considerations. The LTC2373-18 dissipates only 40mW and automatically naps between conversions, leading to reduced power dissipation that scales with the sampling rate. A sleep mode is also provided to reduce the power consumption of the LTC2373-18 to 300μW for further power savings during inactive periods. L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673. n 1Msps Throughput Rate n 18-Bit Resolution with No Missing Codes n 8-Channel Multiplexer with Selectable Input Range n Fully Differential (±4.096V) n Pseudo-Differential Unipolar (0V to 4.096V) n Pseudo-Differential Bipolar (±2.048V) n INL: ±2.75LSB (Maximum) n SNR: 100dB (Fully Differential)/95dB (Pseudo- Differential) (Typical) at fIN = 1kHz n THD: –110dB (Typical) at fIN = 1kHz n Programmable Sequencer n Selectable Digital Gain Compression n Single 5V Supply with 1.8V to 5V I/O Voltages n SPI-Compatible Serial I/O n Onboard 2.048V Reference and Reference Buffer n No Pipeline Delay, No Cycle Latency n Power Dissipation 40mW (Typical) n Guaranteed Operation to 125°C n 32-Lead 5mm × 5mm QFN Package n Programmable Logic Controllers n Industrial Process Control n High Speed Data Acquisition n Portable or Compact Instrumentation n ATE Integral Nonlinearity vs Output Code SAMPLE CLOCK 237318 TA01a 10µF 0.1µF 5V 1.8V TO 5V 47µF 1200pF 10 10 1200pF REFBUF GND RESET RDL SDO SCK SDI BUSY CNV CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM LTC2373-18 MUX VDD 2.2µF 0.1µF REFIN VDDLBYP OVDD 18-BIT SAMPLING ADC + – – + 4.096V 0V 0V 4.096V 0V 2.048V 4.096V 0V 4.096V 0V OUTPUT CODE 65536 0 131072 196608 262144 –2.0 1.5 –0.5 0 0.5 –1.0 –1.5 2.0 1.0 2373 TA01b FULLY DIFFERENTIAL BIPOLAR UNIPOLAR |
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