Datasheet LTC2172-14, LTC2171-14, LTC2170-14 (Analog Devices)

LTC2172-14/ LTC2171-14/LTC2170-14 14-Bit, 65Msps/40Msps/ 25Msps Low Power Quad ADCs
FeaTures DescripTion
n
4-Channel Simultaneous Sampling ADC
The LTC®2172-14/LTC2171-14/LTC2170-14 are 4-channel, n
73.7dB SNR
simultaneous sampling 14-bit A/D converters designed for n
90dB SFDR
digitizing high frequency, wide dynamic range signals. They n Low Power: 311mW/202mW/162mW Total, are perfect for demanding communications applications 78mW/51mW/41mW per Channel with AC performance that includes 73.7dB SNR and 90dB n Single 1.8V Supply spurious free dynamic range (SFDR). An ultralow jitter of n Serial LVDS Outputs: One or Two Bits per Channel 0.15psRMS allows undersampling of IF frequencies with n Selectable Input Ranges: 1VP-P to 2VP-P excellent noise performance. n 800MHz Full Power Bandwidth Sample-and-Hold DC specifications include ±1LSB INL (typ), ±0.3LSB DNL n Shutdown and Nap Modes (typ) and no missing codes over temperature. The transi- n Serial SPI Port for Configuration tion noise is a low 1.2LSBRMS. n Pin-Compatible 14-Bit and 12-Bit Versions n 52-Pin (7mm × 8mm) QFN Package The digital outputs are serial LVDS to minimize the num- ber of data lines. Each channel outputs two bits at a time
applicaTions
(2-lane mode) or one bit at a time (1-lane mode). The LVDS n drivers have optional internal termination and adjustable Communications n output levels to ensure clean signal integrity. Cellular Base Stations n Software Defined Radios The ENC+ and ENC– inputs may be driven differentially n Portable Medical Imaging or single-ended with a sine wave, PECL, LVDS, TTL or n Multichannel Data Acquisition CMOS inputs. An internal clock duty cycle stabilizer al- n Nondestructive Testing lows high performance at full speed for a wide range of L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear clock duty cycles. Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion
1.8V 1.8V
LTC2172-14, 65Msps,
VDD OVDD
2-Tone FFT, fIN = 70MHz and 75MHz
CHANNEL 1 14-BIT OUT1A ANALOG S/H ADC CORE 0 INPUT OUT1B –10 –20 CHANNEL 2 14-BIT OUT2A ANALOG S/H –30 ADC CORE INPUT OUT2B DATA –40 SERIALIZER –50 CHANNEL 3 SERIALIZED 14-BIT OUT3A ANALOG S/H LVDS –60 ADC CORE OUT3B INPUT OUTPUTS –70 AMPLITUDE (dBFS) –80 CHANNEL 4 OUT4A 14-BIT ANALOG S/H –90 ADC CORE OUT4B INPUT –100 DATA –110 CLOCK ENCODE –120 PLL OUT INPUT 0 10 20 30 FRAME FREQUENCY (MHz) 217214 TA01b GND OGND 217214 TA01 21721014fb 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Digital Inputs and Outputs Power Requirements Timing Characteristics Timing Diagrams Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts