LTC2333-18 Buffered 8-Channel, 18-Bit, 800ksps Differential 10.24V ADC with 30V Common Mode Range P-P FEATURES DESCRIPTION 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 85C/125C buffered differential, wide common mode range picoamp n inputs. Operating from a 5V low voltage supply, flexible 3LSB INL (Maximum 10.24V Range) n high voltage supplies, and using the internal reference Guaranteed 18-Bit, No Missing Codes n and buffer, this SoftSpan ADC can be configured on a Differential, Wide Common Mode Range Inputs n conversion-by-conversion basis to accept 10.24V, 0V to 8-Channel Multiplexer with SoftSpan Input Ranges: 10.24V, 5.12V, or 0V to 5.12V signals on any channel. 10.24V, 0V to 10.24V, 5.12V, 0V to 5.12V Alternately, the ADC may be programmed to cycle through 12.5V, 0V to 12.5V, 6.25V, 0V to 6.25V n a sequence of channels and ranges without further user 96.4dB Single-Conversion SNR (Typical) n intervention. 110dB THD (Typical) at f = 2kHz IN 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 SoftSpan is a trademark of Analog Devices, Inc. All other trademarks are the property of their n 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 0.1F 0.1F 2.2F 0.1F Output Code and Channel CMOS OR LVDS 2.0 I/O INTERFACE 10.24V RANGE TRUE BIPOLAR DRIVE (IN = 0V) 1.5 FULLY BUFFERS V V V OV CC DD DDLBYP DD LVDS/CMOS ALL CHANNELS ARBITRARY DIFFERENTIAL PD +10V +5V 1.0 + IN0 LTC2333-18 0V 0V IN0 0.5 SDO SCKO 10V 5V 0 SCKI 18-BIT MUX SAMPLING SDI TRUE BIPOLAR UNIPOLAR 0.5 CS +10V ADC +10V BUSY SAMPLE 1.0 + CNV 0V 0V IN7 CLOCK 1.5 IN7 10V 10V + 2.0 DIFFERENTIAL INPUTS IN /IN WITH V REFBUF REFIN GND EE 131072 65536 0 65536 131072 WIDE INPUT COMMON MODE RANGE 233318 TA01a OUTPUT CODE EIGHT BUFFERED 47F 0.1F 233318 TA01b CHANNELS 0.1F 15V 233318f 1 For more information www.linear.com/LTC2333-18 INL ERROR (LSB)LTC2333-18 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) TOP VIEW Supply Voltage (V ) .....................0.3V to (V + 40V) CC EE Supply Voltage (V ) ................................ 17.4V to 0.3V EE Supply Voltage Difference (V V ) ......................40V CC EE Supply Voltage (V ) ..................................................6V DD Supply Voltage (OV ) ................................................6V DD IN6 1 36 GND + Internal Regulated Supply Bypass (V ) ... (Note 3) DDLBYP IN6 2 35 SDO + IN5 3 34 SDO Analog Input Voltage + IN5 4 33 SCKO /SDO + + + IN4 5 32 SCKO /SCKO IN0 to IN7 , + IN4 6 31 OV DD IN0 to IN7 (Note 4) .........(V 0.3V) to (V + 0.3V) IN3 7 30 GND EE CC + IN3 8 29 SCKI /SCKI + REFIN .................................................... 0.3V to 2.8V IN2 9 28 SCKI + IN2 10 27 SDI REFBUF, CNV (Note 5) ............. 0.3V to (V + 0.3V) + DD IN1 11 26 SDI + IN1 12 25 GND Digital Input Voltage (Note 5) ..... 0.3V to (OV + 0.3V) DD Digital Output Voltage (Note 5) .. 0.3V to (OV + 0.3V) DD Power Dissipation .............................................. 500mW Operating Temperature Range LTC2333C ................................................ 0C to 70C LTC2333I .............................................40C to 85C LX PACKAGE LTC2333H .......................................... 40C to 125C 48-LEAD (7mm 7mm) PLASTIC LQFP Storage Temperature Range .................. 65C to 150C T = 150C, = 53C/W JMAX JA ORDER INFORMATION