Document
FEATURES
nn 68.5dB SNR nn 90dB SFDR nn Low Power: 347mW/333mW/306mW Total nn Single 1.8V Supply nn DDR LVDS Outputs nn Easy-to-Drive 1.5VP-P Input Range nn 1.25GHz Full Power Bandwidth S/H nn Optional Clock Duty Cycle Stabilizer nn Low Power Sleep and Nap Modes nn Serial SPI Port for Configuration nn Pin-Compatible 14-Bit Versions nn 40-Lead (6mm × 6mm) QFN Package
APPLICATIONS
nn Communications nn Cellular Basestations nn Software Defined Radios nn Medical Imaging nn High Definition Video nn Testing and Measurement Instruments
LTC2152-12/ LTC2151-12/LTC2150-12
Single 12-Bit 250Msps/ 210Msps/170Msps ADCs
DESCRIPTION
The LTC®2152-12/LTC2151-12/LTC2150-12 are a family of 250Msps/210Msps/170Msps 12-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect for demanding communications applications with AC performance that includes 68.5dB SNR and 90dB spurious free dynamic range (SFDR). The 1.25GHz input bandwidth allows the ADC to undersample high input frequencies with good performance. The latency is only six clock cycles.
DC specs include ±0.26LSB INL (typ), ±0.16LSB DNL (typ) and no missing codes over temperature. The transition noise is 0.54LSBRMS.
The digital outputs are double-data rate (DDR) LVDS.
The ENC+ and ENC– inputs can be driven differentially with a sine wave, PECL, LVDS, TTL, or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.
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.
TYPICAL APPLICATION
VDD
ANALOG INPUT
S/H
12-BIT PIPELINED
ADC
CORRECTION LOGIC
CLOCK
CLOCK/DUTY CYCLE
CONTROL
GND
OUTPUT DRIVERS
OVDD
D10_11 • • • D0_1
DDR LVDS
OGND
21521012 TA01a
AMPLITUDE (dBFS)
LTC2152-12: 32K Point 2-Tone FFT, fIN = 71MHz and 69MHz, 250Msps
0
–20
–40
–60
–80
–100
–120 0
20 40 60 80 100 120 FREQUENCY (MHz)
21521012 TA01b
For more information www.linear.com/LTC2152-12
21521012fa
1
LTC2152-12/ LTC2151-12/LTC2150-12
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Supply Voltage VDD, OVDD................................................. –0.3V to 2V
Analog Input Voltage AIN+, AIN–, PAR/SER, SENSE (Note 3)......................... –0.3V to (VDD + 0.2V)
Digital Input Voltage ENC+, ENC– (Note 3)................. –0.3V to (VDD + 0.3V) CS, SDI, SCK (Note 4)............................ –0.3V to 3.9V
SDO (Note 4).............................................. –0.3V to 3.9V Digital Output Voltage................. –0.3V to (OVDD + 0.3V) Operating Temperature Range
LTC2152C, LTC2151C, LTC2150C.............. 0°C to 70°C LTC2152I, LTC2151I, LTC2150I.............–40°C to 85°C Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
PAR/SER CS SCK SDI SDO GND D10_11+ D10_11– D8_9+ D8_9–
40 39 38 37 36 35 34 33 32 31
VDD 1 VDD 2 GND 3 AIN+ 4 AIN– 5 GND 6
SEN.