Datasheet LTC2337-18 (Analog Devices)

LTC2337-18 18-Bit, 500ksps, ±10.24V True Bipolar, Fully Differential Input ADC with 100dB SNR
FEATURES DESCRIPTION
n
500ksps Throughput Rate
The LTC®2337-18 is a low noise, high speed 18-bit succes- n
±4LSB INL (Max)
sive approximation register (SAR) ADC with fully differential n
Guaranteed 18-Bit No Missing Codes
inputs. Operating from a single 5V supply, the LTC2337-18 n
Fully Differential Inputs
has a ±10.24V true bipolar input range, making it ideal for n
True Bipolar Input Ranges ±6.25V, ±10.24V, ±12.5V
high voltage applications which require a wide dynamic n
100dB SNR (Typ) at fIN = 2kHz
range. The LTC2337-18 achieves ±4LSB INL maximum, n
–115dB THD (Typ) at fIN = 2kHz
no missing codes at 18-bits with 100dB SNR. n Guaranteed Operation to 125°C The LTC2337-18 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 LTC2337-18 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 featuring n 1.8V to 5V I/O Voltages a daisy-chain mode. The fast 500ksps throughput with n SPI-Compatible Serial I/O with Daisy-Chain Mode no cycle latency makes the LTC2337-18 ideally suited n Internal Conversion Clock for a wide variety of high speed applications. An internal n Power Dissipation 35mW (Typ) oscillator sets the conversion time, easing external timing n 16-Lead MSOP Package considerations. The LTC2337-18 dissipates only 35mW and automatically naps between conversions, leading to
APPLICATIONS
reduced power dissipation that scales with the sampling n rate. A sleep mode is also provided to reduce the power Programmable Logic Controllers n consumption of the LTC2337-18 to 300μW for further Industrial Process Control n power savings during inactive periods. High Speed Data Acquisition L n , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Portable or Compact Instrumentation 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 and 7961132
TYPICAL APPLICATION 32k Point FFT fS = 500ksps, fIN = 2kHz
5V 1.8V TO 5V 0 SNR = 100.4dB 10µF 2.2µF 0.1µF –20 THD = –116dB SINAD = 100.3dB –40 SFDR = –118dB +10.24V VDD VDDLBYP OVDD CHAIN –60 + IN+ RDL/SDI –10.24V SDO –80 +10.24V LTC2337-18 SCK – –100 IN– BUSY –10.24V CNV SAMPLE CLOCK REF REFBUF REFIN GND AMPLITUDE (dBFS) –120 233718 TA01 47µF 100nF –140 –160 –180 0 50 100 150 200 250 FREQUENCY (kHz) 233718 TA01b 233718fa For more information www.linear.com/LTC2337-18 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information Board Layout Package Description Revision History Typical Application Related Parts