Datasheet LTC2311-14 (Analog Devices)

LTC2311-14 14-Bit + Sign, 5Msps Differential Input ADC with Wide Input Common Mode Range
FEATURES DESCRIPTION
n
5Msps Throughput Rate
The LTC®2311-14 is a low noise, high speed 14-bit + n
±0.75LSB INL (Typ), ±2LSB INL Guaranteed
sign successive approximation register (SAR) ADC with n
Guaranteed 14-Bit, No Missing Codes
differential inputs and wide input common mode range. n
8VP-P Differential Inputs with Wide Input Common
Operating from a single 3.3V or 5V supply, the LTC2311-
Mode Range
14 has an 8VP-P differential input range, making it ideal n
80dB SNR (Typ) at fIN = 2.2MHz
for applications which require a wide dynamic range with n
–90dB THD (Typ) at fIN = 2.2MHz
high common mode rejection. The LTC2311-14 achieves n Guaranteed Operation –40°C to 125°C ±0.75LSB INL typical, no missing codes at 14 bits and n Single 3.3V or 5V Supply 80dB SNR typical. n Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal The LTC2311-14 has an onboard low drift (20ppm/°C max) Reference with 1.25V External Reference Input 2.048V or 4.096V temperature compensated reference and n 1.8V to 2.5V I/O Voltages provides an external 1.25V buffered reference input. The n CMOS or LVDS SPI-Compatible Serial I/O LTC2311-14 also has a high speed SPI-compatible serial n Power Dissipation 50mW at VDD = 5V (Typ) interface that supports CMOS or LVDS. The fast 5Msps n Small 16-Lead (4mm × 5mm) MSOP Package throughput with one-cycle latency makes the LTC2311-14 ideally suited for a wide variety of high speed applications.
APPLICATIONS
The LTC2311-14 dissipates only 50mW with a 5V supply n High Speed Data Acquisition Systems and offers nap and sleep modes to reduce the power n Communications consumption to 5μW for further power savings during n Remote Data Acquisition inactive periods. n Imaging L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Optical Networking n Automotive n Multiphase Motor Control
TYPICAL APPLICATION DIFFERENTIAL INPUTS
3.3V OR 5V
32k Point FFT fSMPL = 5Msps, fIN = 2.2MHz NO CONFIGURATION REQUIRED IN+, IN–
1µF 0 SNR = 80.6dB THD = –90dB ARBITRARY DIFFERENTIAL –20 V REFOUT SINAD = 80.1dB 25Ω DD SFDR = 96dB A 10µF IN+ –40 LTC2311-14 –60 0V 0V 47pF REFIN 10µF –80 AMPLITUDE (dBFS) BIPOLAR UNIPOLAR –100 25Ω LVDS OR CMOS SDO AIN– CONFIGURABLE SCK –120 I/O CMOS/LVDS CNV –140 0V 0V GND OV 0 0.5 1 1.5 2 2.5 DD 1.8V TO 2.5V FREQUENCY (MHz) 1µF 231114 TA01b 231114 TA01a 231114fa For more information www.linear.com/LTC2311-14 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Digital Inputs And Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Functional Block Diagram Timing Diagram Applications Information Package Description Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Digital Inputs And Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information OVERVIEW CONVERTER OPERATION TRANSFER FUNCTION INPUT DRIVE CIRCUITS ADC REFERENCE DYNAMIC PERFORMANCE POWER CONSIDERATIONS TIMING AND CONTROL DIGITAL INTERFACE BOARD LAYOUT Package Description Revision History Typical Application Related Parts