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LTC2345-16 Dataheets PDF



Part Number LTC2345-16
Manufacturers Linear
Logo Linear
Description 200ksps Differential SoftSpan ADC
Datasheet LTC2345-16 DatasheetLTC2345-16 Datasheet (PDF)

LTC2345-16 Features Octal, 16-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range Description nn 200ksps per Channel Throughput nn Eight Simultaneous Sampling Channels nn ±1.25LSB INL (Maximum) nn Guaranteed 16-Bit, No Missing Codes nn Differential, Wide Common Mode Range Inputs nn Per-Channel SoftSpan Input Ranges: ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V ±5V, 0V to 5V, ±2.5V, 0V to 2.5V nn 91dB Single-Conversion SNR (Typical) nn −113dB THD (Typical) at fIN = 2kHz nn.

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LTC2345-16 Features Octal, 16-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range Description nn 200ksps per Channel Throughput nn Eight Simultaneous Sampling Channels nn ±1.25LSB INL (Maximum) nn Guaranteed 16-Bit, No Missing Codes nn Differential, Wide Common Mode Range Inputs nn Per-Channel SoftSpan Input Ranges: ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V ±5V, 0V to 5V, ±2.5V, 0V to 2.5V nn 91dB Single-Conversion SNR (Typical) nn −113dB THD (Typical) at fIN = 2kHz nn 102dB CMRR (Typical) at fIN = 200Hz nn Rail-to-Rail Input Overdrive Tolerance nn Guaranteed Operation to 125°C nn Integrated Reference and Buffer (4.096V) nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O nn Internal Conversion Clock, No Cycle Latency nn 81mW Power Dissipation (Typical) nn 48-Lead (7mm x 7mm) QFN Package Applications nn Programmable Logic Controllers nn Industrial Process Control nn Medical Imaging nn High Speed Data Acquisition The LTC®2345-16 is a 16-bit, low noise 8-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V low voltage supply 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 ±4.096, 0V to 4.096V, ±2.048V, or 0V to 2.048V signals. Individual channels may also be disabled to increase throughput on the remaining channels. The wide input common mode range and 102dB CMRR of the LTC2345-16 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±1.25LSB INL, no missing codes at 16 bits, and 91dB SNR, makes the LTC2345-16 an ideal choice for many applications requiring wide dynamic range. The LTC2345-16 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. Typical Application ARBITRARY 5V FULLY DIFFERENTIAL 5V 0V BIPOLAR 5V 0V UNIPOLAR 5V 0V 0V DIFFERENTIAL INPUTS IN+/IN– WITH WIDE INPUT COMMON MODE RANGE IINN00+– S/H S/H S/H S/H S/H S/H S/H IINN77+– S/H EIGHT SIMULTANEOUS SAMPLING CHANNELS ••• ••• 5V 0.1µF 2.2µF 1.8V TO 5V 0.1µF CMOS OR LVDS I/O INTERFACE VDD VDDLBYP OVDD LVDS/CMOS PD LTC2345-16 SDO0 MUX 16-BIT SAR ADC REFBUF REFIN GND 47µF 0.1µF SDO7 SCKO SCKI SDI CS BUSY CNV 234516 TA01a SAMPLE CLOCK For more information www.linear.com/LTC2345-16 INL ERROR (LSB) Integral Nonlinearity vs Output Code and Channel 1.00 ±4.096V RANGE 0.75 FULLY DIFFERENTIAL DRIVE (IN– = –IN+) ALL CHAN.


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