LTC2333-18 Buffered 8-Channel, 18-Bit, 800ksps Differential ±10.24V ADC with 30VP-P Common Mode Range FEATURESDESCRIPTION n Eight Buffered Multiplexed Channels The LTC®2333-18 is an 18-bit, low noise 8-channel multi- n 800ksps Throughput plexed successive approximation register (SAR) ADC with n 500pA/12nA Maximum Input Leakage at 85°C/125°C buffered differential, wide common mode range picoamp n ±3LSB INL (Maximum ±10.24V Range) inputs. Operating from a 5V low voltage supply, flexible n Guaranteed 18-Bit, No Missing Codes high voltage supplies, and using the internal reference n Differential, Wide Common Mode Range Inputs and buffer, this SoftSpan™ ADC can be configured on a n 8-Channel Multiplexer with SoftSpan Input Ranges: conversion-by-conversion basis to accept ±10.24V, 0V to ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V 10.24V, ±5.12V, or 0V to 5.12V signals on any channel. ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V Alternately, the ADC may be programmed to cycle through n 96.4dB Single-Conversion SNR (Typical) a sequence of channels and ranges without further user n −110dB THD (Typical) at f intervention. IN = 2kHz n 128dB CMRR, –125dB Active Crosstalk (Typical) The integrated picoamp-input analog buffers, wide input n 420ns Step Response (Full-Scale, 0.005% Settling) common mode range and 128dB CMRR of the LTC2333- n Rail-to-Rail Input Overdrive Tolerance 18 allow the ADC to directly digitize a variety of signals n Programmable Sequencer with No-Latency Control using minimal board space and power. This input signal n Integrated Reference and Buffer (4.096V) flexibility, combined with ±3LSB INL, no missing codes n SPI CMOS (1.8V to 5V) and LVDS Serial I/O at 18 bits, and 96.4dB SNR, makes the LTC2333-18 an n 268mW Power Dissipation (Typical) ideal choice for many high voltage applications requiring n 48-Lead (7mm × 7mm) LQFP Package wide dynamic range. The LTC2333-18 supports pin-selectable SPI CMOS (1.8V APPLICATIONS to 5V) and LVDS serial interfaces. n Direct Sensor Measurement L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n SoftSpan is a trademark of Analog Devices, Inc. All other trademarks are the property of their Programmable Logic Controllers respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673, 9197235. n Industrial Process Control n Test and Measurement TYPICAL APPLICATION 15V 5V 1.8V TO 5V Integral Nonlinearity vs 0.1µF 0.1µF 2.2µF 0.1µF Output Code and Channel CMOS OR LVDS I/O INTERFACE 2.0 ±10.24V RANGE FULLY BUFFERS V TRUE BIPOLAR DRIVE (IN– = 0V) CC VDD VDDLBYP OVDD LVDS/CMOS 1.5 ARBITRARY DIFFERENTIAL PD ALL CHANNELS +10V +5V 1.0 IN0+ LTC2333-18 0V 0V IN0– SDO 0.5 –10V SCKO –5V • • • 18-BIT SCKI 0 MUX TRUE BIPOLAR UNIPOLAR SAMPLING SDI –0.5 +10V +10V ADC CS INL ERROR (LSB) BUSY SAMPLE 0V 0V CNV –1.0 IN7+ CLOCK –10V –10V IN7– –1.5 DIFFERENTIAL INPUTS IN+/IN– WITH V –2.0 EE REFBUF REFIN GND WIDE INPUT COMMON MODE RANGE –131072 –65536 0 65536 131072 233318 TA01a EIGHT BUFFERED OUTPUT CODE 47µF 0.1µF CHANNELS 0.1µF 233318 TA01b –15V 233318f For more information www.linear.com/LTC2333-18 1
