LTC2328-18 18-Bit, 1Msps, 10.24V True Bipolar, Pseudo-Differential Input ADC with 95dB SNR Fea T Descrip T n 1Msps Throughput Rate The LTC 2328-18 is a low noise, high speed 18-bit suc- n 5LSB INL (Max) cessive approximation register (SAR) ADC with pseudo- n Guaranteed 18-Bit No Missing Codes differential inputs. Operating from a single 5V supply, n Pseudo-Differential Inputs the LTC2328-18 has a 10.24V true bipolar input range, n True Bipolar Input Ranges 6.25V, 10.24V, 12.5V making it ideal for high voltage applications which require n 95dB SNR (Typ) at f = 2kHz a wide dynamic range. The LTC2328-18 achieves 5LSB IN n 111dB THD (Typ) at f = 2kHz INL maximum, no missing codes at 18 bits with 95dB SNR. IN n Guaranteed Operation to 125C The LTC2328-18 has an onboard single-shot capable n Single 5V Supply reference buffer and low drift (20ppm/C max) 2.048V n Low Drift (20ppm/C Max) 2.048V Internal Reference temperature compensated reference. The LTC2328-18 n Onboard Single-Shot Capable Reference Buffer also has a high speed SPI-compatible serial interface that n No Pipeline Delay, No Cycle Latency supports 1.8V, 2.5V, 3.3V and 5V logic while also featur- n 1.8V to 5V I/O Voltages ing a daisy-chain mode. The fast 1Msps throughput with n SPI-Compatible Serial I/O with Daisy-Chain Mode no cycle latency makes the LTC2328-18 ideally suited n Internal Conversion Clock for a wide variety of high speed applications. An internal n Power Dissipation 50mW (Typ) oscillator sets the conversion time, easing external timing n 16-Lead MSOP Package considerations. The LTC2328-18 dissipates only 50mW and automatically naps between conversions, leading to a T reduced power dissipation that scales with the sampling n Programmable Logic Controllers rate. A sleep mode is also provided to reduce the power n Industrial Process Control consumption of the LTC2328-18 to 300W for further n High Speed Data Acquisition power savings during inactive periods. n Portable or Compact Instrumentation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the n ATE property of their respective owners. Protected by U.S. Patents, including 7705765, 7961132. Typical a T 32k Point FFT f = 1Msps, S f = 2kHz IN 5V 1.8V TO 5V 0 SNR = 95.3dB 20 THD = 113dB 10F 2.2F 0.1F SINAD = 95.2dB +10.24V 40 SFDR = 115dB + V V OV DD DDLBYP DD 60 CHAIN 10.24V + LT 1468 IN RDL/SDI 80 SDO LTC2328-18 SCK 100 BUSY IN SAMPLE CLOCK CNV 120 REF REFBUF REFIN GND 232818 TA01 140 100nF 47F 160 180 0 100 200 300 400 500 FREQUENCY (kHz) 232818 TA01b 232818fa 1 For more information www.linear.com/LTC2328-18 AMPLITUDE (dBFS) ion pplica ions pplica ion uresLTC2328-18 a Te Maxi Mu M r a T p c F T (Notes 1, 2) TOP VIEW Supply Voltage (V ) ..................................................6V DD V 1 16 GND DDLBYP V 2 15 OV DD DD Supply Voltage (OV ) ................................................6V DD GND 3 14 SDO + IN 4 13 SCK Supply Bypass Voltage (V ) ...........................3.2V DDLBYP IN 5 12 RDL/SDI GND 6 11 BUSY Analog Input Voltage REFBUF 7 10 CHAIN + IN , IN ..............................................16.5V to 16.5V REFIN 8 9 CNV MS PACKAGE REFBUF ...................................................................6V 16-LEAD PLASTIC MSOP REFIN ..................................................................2.8V T = 150C, = 110C/W JMAX JA Digital Input Voltage (Note 3) ........................... (GND 0.3V) to (OV + 0.3V) DD Digital Output Voltage (Note 3) ........................... (GND 0.3V) to (OV + 0.3V) DD Power Dissipation .............................................. 500mW Operating Temperature Range LTC2328C ................................................ 0C to 70C LTC2328I .............................................40C to 85C LTC2328H .......................................... 40C to 125C Storage Temperature Range .................. 65C to 150C o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2328CMS-18 PBF LTC2328CMS-18 TRPBF 232818 16-Lead Plastic MSOP 0C to 70C LTC2328IMS-18 PBF LTC2328IMS-18 TRPBF 232818 16-Lead Plastic MSOP 40C to 85C LTC2328HMS-18 PBF LTC2328HMS-18 TRPBF 232818 16-Lead Plastic MSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: