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LTC2668 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2668 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 40 page  LTC2348-16 1 234816fa For more information www.linear.com/LTC2348-16 Typical applicaTion FeaTures DescripTion Octal, 16-Bit, 200ksps Differential ±10.24V Input SoftSpan ADC with Wide Input Common Mode Range The LTC®2348-16 is a 16-bit, low noise 8-channel si- multaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, each channel of this SoftSpanTM ADC can be independently configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. Individual channels may also be disabled to increase throughput on the remaining channels. The wide input common mode range and 118dB CMRR of the LTC2348-16 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain de- sign. This input signal flexibility, combined with ±1LSB INL, no missing codes at 16 bits, and 94.4dB SNR, makes the LTC2348-16 an ideal choice for many high voltage applications requiring wide dynamic range. The LTC2348-16 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and eight lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput. 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. Other Patents pending. applicaTions n 200ksps per Channel Throughput n Eight Simultaneous Sampling Channels n ±1LSB INL (Maximum) n Guaranteed 16-Bit, No Missing Codes n Differential, Wide Common Mode Range Inputs n Per-Channel SoftSpan Input Ranges: ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V n 94.4dB Single-Conversion SNR (Typical) n −109dB THD (Typical) at fIN = 2kHz n 118dB CMRR (Typical) at fIN = 200Hz n Rail-to-Rail Input Overdrive Tolerance n Guaranteed Operation to 125°C n Integrated Reference and Buffer (4.096V) n SPI CMOS (1.8V to 5V) and LVDS Serial I/O n Internal Conversion Clock, No Cycle Latency n 140mW Power Dissipation (Typical) n 48-Lead (7mm x 7mm) LQFP Package n Programmable Logic Controllers n Industrial Process Control n Power Line Monitoring n Test and Measurement ±10.24V RANGE TRUE BIPOLAR DRIVE (IN– = 0V) ALL CHANNELS OUTPUT CODE –32768 –16384 0 16384 32768 –1.00 –0.75 –0.50 –0.25 0 0.25 0.50 0.75 1.00 234816 G01 Integral Nonlinearity vs Output Code and Channel 0.1µF 2.2µF 0.1µF 0.1µF 1.8V TO 5V 5V 15V –15V SAMPLE CLOCK 234816 TA01a S/H S/H S/H S/H S/H S/H S/H S/H MUX VCC VDD VDDLBYP OVDD EIGHT SIMULTANEOUS SAMPLING CHANNELS DIFFERENTIAL INPUTS IN+/IN– WITH WIDE INPUT COMMON MODE RANGE +5V 0V –5V FULLY DIFFERENTIAL +10V 0V –10V TRUE BIPOLAR +10V 0V –10V ARBITRARY +10V 0V –10V UNIPOLAR SDO0 SDO7 SCKO SCKI SDI CS BUSY CNV LVDS/CMOS PD IN0+ IN0– IN7+ IN7– 16-BIT SAR ADC CMOS OR LVDS I/O INTERFACE 0.1µF REFIN 47µF 0.1µF GND REFBUF VEE LTC2348-16 |
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