LTC2353-16 Buffered Dual, 16-Bit, 550ksps/Ch Differential 10.24V ADC with 30V Common Mode Range P-P FEATURES DESCRIPTION n Simultaneous Sampling of 2 Buffered Channels The LTC 2353-16 is a 16-bit, low noise 2-channel simulta- n 550ksps per Channel Throughput neous sampling successive approximation register (SAR) n 500pA/12nA Max Input Leakage at 85C/125C ADC with buffered differential, wide common mode range n 1LSB INL (Maximum, 10.24V Range) picoamp inputs. Operating from a 5V low voltage sup- n Guaranteed 16-Bit, No Missing Codes ply, flexible high voltage supplies, and using the internal TM n Differential, Wide Common Mode Range Inputs reference and buffer, both channels of this SoftSpan n Per-Channel SoftSpan Input Ranges: ADC can be independently configured on a conversion- 10.24V, 0V to 10.24V, 5.12V, 0V to 5.12V by-conversion basis to accept 10.24V, 0V to 10.24V, 12.5V, 0V to 12.5V, 6.25V, 0V to 6.25V 5.12V, or 0V to 5.12V signals. One channel may also n 94.2dB Single-Conversion SNR (Typical) be disabled to increase throughput on the other channel. n 110dB THD (Typical) at f = 2kHz IN The integrated picoamp-input analog buffers, wide input n 124dB CMRR (Typical) at f = 200Hz IN common mode range and 124dB CMRR of the LTC2353-16 n Rail-to-Rail Input Overdrive Tolerance allow the ADC to directly digitize a variety of signals us- n Integrated Reference and Buffer (4.096V) ing minimal board space and power. This input signal n SPI CMOS (1.8V to 5V) and LVDS Serial I/O flexibility, combined with 1LSB INL, no missing codes n Internal Conversion Clock, No Cycle Latency at 16 bits, and 94.2dB SNR, makes the LTC2353-16 an n 162mW Power Dissipation (Typical) ideal choice for many high voltage applications requiring n 48-Lead (7mm x 7mm) LQFP Package wide dynamic range. The LTC2353-16 supports pin-selectable SPI CMOS (1.8V APPLICATIONS to 5V) and LVDS serial interfaces. Either one or two lanes n of data output may be employed in CMOS mode, allowing Programmable Logic Controllers the user to optimize bus width and throughput. n Industrial Process Control All registered trademarks and trademarks are the property of their respective owners. Protected n Power Line Monitoring by U.S. Patents, including 7705765, 7961132, 8319673, 9197235. 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 I/O INTERFACE 1.00 10.24V RANGE V V V OV FULLY CC DD DDLBYP DD LVDS/CMOS TRUE BIPOLAR DRIVE (IN = 0V) 0.75 ARBITRARY DIFFERENTIAL PD BOTH CHANNELS BUFFERS +10V +5V 0.50 LTC2353-16 + IN0 0V 0V S/H 0.25 IN0 10V 5V 0 SDO0 16-BIT MUX SDO1 SAR ADC UNIPOLAR TRUE BIPOLAR 0.25 SCKO +10V +10V SCKI + SDI 0.50 IN1 S/H 0V 0V IN1 CS BUSY 0.75 SAMPLE 10V 10V CNV CLOCK V REFBUF REFIN GND 1.00 + EE DIFFERENTIAL INPUTS IN /IN WITH 32768 16384 0 16384 32768 235316 TA01a WIDE INPUT COMMON MODE RANGE OUTPUT CODE 47F 0.1F TWO BUFFERED 0.1F 235316 TA01b SIMULTANEOUS SAMPLING CHANNELS 15V 235316f 1 For more information www.linear.com/LTC2353-16 INL ERROR (LSB)LTC2353-16 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 GND 1 36 GND Internal Regulated Supply Bypass (V ) ... (Note 3) DDLBYP GND 2 35 SDO + IN1 3 34 SDO Analog Input Voltage + IN1 4 33 SCKO /SDO1 + + + IN0 , IN1 , GND 5 32 SCKO /SCKO GND 6 31 OV DD IN0 , IN1 (Note 4) ............(V 0.3V) to (V + 0.3V) EE CC GND 7 30 GND GND 8 29 SCKI /SCKI REFIN .................................................... 0.3V to 2.8V + IN0 9 28 SCKI /SDO0 + IN0 10 27 SDI REFBUF, CNV (Note 5) ............. 0.3V to (V + 0.3V) DD + GND 11 26 SDI Digital Input Voltage (Note 5) ..... 0.3V to (OV + 0.3V) GND 12 25 GND DD Digital Output Voltage (Note 5) .. 0.3V to (OV + 0.3V) DD Power Dissipation .............................................. 500mW Operating Temperature Range LTC2353C ................................................ 0C to 70C LTC2353I .............................................40C to 85C LTC2353H .......................................... 40C to 125C LX PACKAGE 48-LEAD (7mm 7mm) PLASTIC LQFP Storage Temperature Range .................. 65C to 150C T = 150C, = 53C/W JMAX JA ORDER INFORMATION