LTC2344-16 Quad, 16-Bit, 400ksps/ch Differential SoftSpan ADC with Wide Input Common Mode Range FEATURESDESCRIPTION n 400ksps per Channel Throughput The LTC®2344-16 is a 16-bit, low noise 4-channel simulta- n Four Simultaneous Sampling Channels neous sampling successive approximation register (SAR) n ±1.25LSB INL (Maximum) ADC with differential, wide common mode range inputs. n Guaranteed 16-Bit, No Missing Codes Operating from a 5V supply and using the internal reference n Differential, Wide Common Mode Range Inputs and buffer, each channel of this SoftSpanTM ADC can be n Per-Channel SoftSpan Input Ranges: independently configured on a conversion-by-conversion ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V basis to accept ±4.096V, 0V to 4.096V, ±2.048V, or 0V to ±5V, 0V to 5V, ±2.5V, 0V to 2.5V 2.048V signals. Individual channels may also be disabled n to increase throughput on the remaining channels. 93.4dB Single-Conversion SNR (Typical) n −114dB THD (Typical) at fIN = 2kHz The wide input common mode range and 102dB CMRR of n 102dB CMRR (Typical) at fIN = 200Hz the LTC2344-16 analog inputs allow the ADC to directly n Rail-to-Rail Input Overdrive Tolerance digitize a variety of signals, simplifying signal chain design. n Guaranteed Operation to 125°C This input signal flexibility, combined with ±1.25LSB INL, n Integrated Reference and Buffer (4.096V) no missing codes at 16 bits, and 93.4dB SNR, makes the n SPI CMOS (1.8V to 5V) and LVDS Serial I/O LTC2344-16 an ideal choice for many applications requir- n Internal Conversion Clock, No Cycle Latency ing wide dynamic range. n 81mW Power Dissipation (Typical) The LTC2344-16 supports pin-selectable SPI CMOS (1.8V n 32-Lead (5mm × 5mm) QFN Package to 5V) and LVDS serial interfaces. Between one and four lanes of data output may be employed in CMOS mode, APPLICATIONS allowing the user to optimize bus width and throughput. n All registered trademarks and trademarks are the property of their respective owners. Protected Programmable Logic Controllers by U.S. Patents, including 7705765, 7961132, 8319673, 9197235. n Industrial Process Control n Medical Imaging n High Speed Data Acquisition TYPICAL APPLICATION 5V 1.8V TO 5V Integral Nonlinearity 0.1µF 2.2µF 0.1µF vs Output Code and Channel CMOS OR LVDS I/O INTERFACE 1.00 FULLY ±4.096V RANGE VDD VDDLBYP OVDD ARBITRARY DIFFERENTIAL LVDS/CMOS 0.75 FULLY DIFFERENTIAL DRIVE (IN– = –IN+) IN0+ S/H 5V 5V PD ALL CHANNELS IN0– 0.50 LTC2344-16 SDO0 • • • 0.25 0V 0V S/H • • • 0 16-BIT MUX SDO3 BIPOLAR UNIPOLAR SAR ADC SCKO –0.25 5V 5V S/H SCKI INL ERROR (LSB) SDI –0.50 CS –0.75 0V 0V BUSY SAMPLE IN3+ S/H CNV CLOCK IN3– –1.00 DIFFERENTIAL INPUTS IN+/IN– WITH REFBUF REFIN GND –32768 –16384 0 16384 32768 WIDE INPUT COMMON MODE RANGE 234416 TA01a OUTPUT CODE FOUR SIMULTANEOUS 47µF 0.1µF 234416 TA01b SAMPLING CHANNELS Rev A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Configuration Tables Functional Block Diagrams Timing Diagram Applications Information Package Description Revision History Typical Application Related Parts
