LTC2357-16 Buffered Quad, 16-Bit, 350ksps/Ch Differential 10.24V ADC with 30V Common Mode Range P-P Fea T Descrip T n Simultaneous Sampling of 4 Buffered Channels The LTC 2357-16 is a 16-bit, low noise 4-channel simulta- n 350ksps 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 supply, n Guaranteed 16-Bit, No Missing Codes flexible high voltage supplies, and using the internal refer- TM n Differential, Wide Common Mode Range Inputs ence and buffer, each channel of this SoftSpan ADC can be n Per-Channel SoftSpan Input Ranges: independently configured on a conversion-by-conversion n 10.24V, 0V to 10.24V, 5.12V, 0V to 5.12V basis to accept 10.24V, 0V to 10.24V, 5.12V, or 0V to n 12.5V, 0V to 12.5V, 6.25V, 0V to 6.25V 5.12V signals. Individual channels may also be disabled n 94.2dB Single-Conversion SNR (Typical) to increase throughput on the remaining channels. n 110dB THD (Typical) at f = 2kHz IN The integrated picoamp-input analog buffers, wide input n 128dB CMRR (Typical) at f = 200Hz IN common mode range and 128dB CMRR of the LTC2357-16 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 LTC2357-16 an n 175mW Power Dissipation (44mW/Ch Typical) ideal choice for many high voltage applications requiring n 48-Lead (7mm x 7mm) LQFP Package wide dynamic range. The LTC2357-16 supports pin-selectable SPI CMOS (1.8V a T to 5V) and LVDS serial interfaces. Between one and four n Programmable Logic Controllers lanes of data output may be employed in CMOS mode, n Industrial Process Control allowing the user to optimize bus width and throughput. n Power Line Monitoring All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673, 9197235. n Test and Measurement Typical a T 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 BUFFERS V V V OV FULLY CC DD DDLBYP DD LVDS/CMOS TRUE BIPOLAR DRIVE (IN = 0V) 0.75 + ARBITRARY DIFFERENTIAL PD IN0 ALL CHANNELS S/H +10V +5V IN0 0.50 LTC2357-16 0V 0V 0.25 SDO0 10V 5V S/H 0 16-BIT MUX SDO3 SAR ADC UNIPOLAR TRUE BIPOLAR 0.25 SCKO +10V +10V S/H SCKI SDI 0.50 0V 0V CS 0.75 BUSY SAMPLE 10V 10V + IN3 CNV S/H CLOCK IN3 1.00 + V REFBUF REFIN GND DIFFERENTIAL INPUTS IN /IN WITH EE 32768 16384 0 16384 32768 WIDE INPUT COMMON MODE RANGE 235716 TA01a OUTPUT CODE 47F 0.1F FOUR BUFFERED 235716 TA01b 0.1F SIMULTANEOUS SAMPLING CHANNELS 15V 235716f 1 For more information www.linear.com/LTC2357-16 INL ERROR (LSB) ion pplica ions pplica ion uresLTC2357-16 a Te Maxi Mu M r a T p in c F T (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 + IN2 3 34 SDO /SDO3 Analog Input Voltage + IN2 4 33 SCKO /SDO2 + + + IN0 to IN3 , GND 5 32 SCKO /SCKO GND 6 31 OV DD IN0 to IN3 (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 + IN1 9 28 SCKI /SDO1 + IN1 10 27 SDI /SDO0 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 LTC2357C ................................................ 0C to 70C LTC2357I .............................................40C to 85C LX PACKAGE LTC2357H .......................................... 40C to 125C 48-LEAD (7mm 7mm) PLASTIC LQFP Storage Temperature Range .................. 65C to 150C T = 150C, = 53C/W JMAX JA o r Der i n F Ma T