Datasheet LTC2320-14 (Analog Devices)

LTC2320-14 Octal, 14-Bit + Sign, 1.5Msps/Ch Simultaneous Sampling ADC
FEATURES DESCRIPTION
n
1.5Msps/Ch Throughput Rate
The LTC®2320-14 is a low noise, high speed octal 14-bit n
Eight Simultaneously Sampling Channels
+ 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
Operating from a single 3.3V or 5V supply, the LTC2320-
Common Mode Range
14 has an 8VP-P differential input range, making it ideal n
81dB SNR (Typ) at fIN = 500kHz
for applications which require a wide dynamic range with n
–90dB THD (Typ) at fIN = 500kHz
high common mode rejection. The LTC2320-14 achieves n Guaranteed Operation to 125°C ±1LSB INL typical, no missing codes at 14 bits and 81dB n Single 3.3V or 5V Supply SNR. n Low Drift (20ppm/°C Max) 2.048V or 4.096V The LTC2320-14 has an onboard low drift (20ppm/°C Internal Reference max) 2.048V or 4.096V temperature-compensated n 1.8V to 2.5V I/O Voltages reference. The LTC2320-14 also has a high speed SPI- n CMOS or LVDS SPI-Compatible Serial I/O compatible serial interface that supports CMOS or LVDS. n Power Dissipation 20mW/Ch (Typ) The fast 1.5Msps per channel throughput with no latency n Small 52-Lead (7mm × 8mm) QFN Package makes the LTC2320-14 ideally suited for a wide variety of high speed applications. The LTC2320-14 dissipates
APPLICATIONS
only 20mW per channel and offers nap and sleep modes n High Speed Data Acquisition Systems to reduce the power consumption to 26μW for further n Communications power savings during inactive periods. n Optical Networking All registered trademarks and trademarks are the property of their respective owners. n Multiphase Motor Control
TYPICAL APPLICATION
10µF 1µF 3.3V OR 5V 1.8V TO 2.5V
32k Point FFT f TRUE DIFFERENTIAL INPUTS SMPL = 1.5Msps,
VDD GND GND OV
NO CONFIGURATION REQUIRED
A + DD IN1– S/H
fIN = 500kHz
AIN1 14-BIT CMOS/LVDS
SMPL IN IN+, IN–
MUX + SIGN SDR/DDR 0 A + IN2 SAR ADC REFBUFEN SNR = 81.1dB – S/H A ARBITRARY DIFFERENTIAL IN2 THD = –90.2dB V –20 DD VDD SINAD = 80.8dB A + IN3– S/H SFDR = 94.7dB A SDO1 IN3 14-BIT MUX + SIGN SDO2 –40 A + SAR ADC SDO3 IN4 0V 0V – S/H A SDO4 IN4 SDO5 –60 LTC2320-14 SDO6 A + IN5– S/H SDO7 A 14-BIT BIPOLAR UNIPOLAR IN5 SDO8 –80 MUX + SIGN V CLKOUT DD VDD A + IN6 SAR ADC – S/H SCK A AMPLITUDE (dBFS) IN6 –100 CNV SAMPLE CLOCK A + IN7 0V 0V – S/H A –120 IN7 14-BIT MUX + SIGN A + IN8 SAR ADC – S/H A –140 IN8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 REF REFOUT1 REFOUT2 REFOUT3 REFOUT4 FREQUENCY (MHz) 232014 TA01a EIGHT SIMULTANEOUS 1µF 10µF 10µF 10µF 10µF 232014 TA01b SAMPLING CHANNELS 232014fa For more information www.linear.com/LTC2320-14 1 Document Outline 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 Package Description Revision History Typical Application Related Parts