LTC2157CUP-14#PBF

LTC2157-14/ LTC2156-14/LTC2155-14 Dual 14-Bit 250Msps/ 210Msps/170Msps ADCs FEATURES DESCRIPTION n n n n n n n n n n n The LTC®2157-14/LTC2156-14/LTC2155-14 are 2-channel simultaneous sampling 250Msps/210Msps/170Msps 14-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 70dB SNR and 90dB spurious free dynamic range (SFDR). The 1.25GHz input bandwidth allows the ADC to undersample high frequencies with good performance. The latency is only six clock cycles. n 70dB SNR 90dB SFDR Low Power: 650mW/616mW/567mW Total Single 1.8V Supply DDR LVDS Outputs Easy-to-Drive 1.5VP-P Input Range 1.25GHz Full Power Bandwidth S/H Optional Clock Duty Cycle Stabilizer Low Power Sleep and Nap Modes Serial SPI Port for Configuration Pin-Compatible 12-Bit Versions 64-Pin (9mm × 9mm) QFN Package DC specs include ±0.85LSB INL (typ), ±0.25LSB DNL (typ) and no missing codes over temperature. The transition noise is 1.82LSBRMS. APPLICATIONS 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. Communications n Cellular Basestations n Software Defined Radios n Medical Imaging n High Definition Video n Testing and Measurement Instruments n 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 LTC2157-14 32K Point FFT, fIN = 15MHz, –1dBFS, 250Msps VDD OVDD ANALOG INPUT CLOCK S/H CLOCK/DUTY CYCLE CONTROL 14-BIT PIPELINED ADC CORE CORRECTION LOGIC OUTPUT DRIVERS DA12_13 • • • DA0_1 0 OGND OVDD CHANNEL B –20 DDR LVDS AMPLITUDE (dBFS) CHANNEL A –40 –60 –80 –100 ANALOG INPUT S/H 14-BIT PIPELINED ADC CORE CORRECTION LOGIC OUTPUT DRIVERS DB12_13 • • • DB0_1 DDR LVDS –120 0 20 40 60 80 100 FREQUENCY (MHz) 120 21576514 TA01b GND 21576514 TA01 OGND 21576514fb For more information www.linear.com/LTC2157-14 1 LTC2157-14/ LTC2156-14/LTC2155-14 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Notes 1, 2) 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 VDD PAR/SER CS SCK SDI SDO GND DA12_13+ DA12_13– DA10_11+ DA10_11– DA8_9+ DA8_9– DA6_7+ DA6_7 – OVDD TOP VIEW VDD 1 VDD 2 GND 3 AINA+ 4 AINA– 5 GND 6 SENSE 7 VREF 8 GND 9 VCM 10 GND 11 AINB– 12 AINB+ 13 GND 14 VDD 15 VDD 16 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 65 GND OGND DA4_5+ DA4_5– DA2_3+ DA2_3– DA0_1+ DA0_1– CLKOUT+ CLKOUT– DB12_13+ DB12_13– DB10_11+ DB10_11– DB8_9+ DB8_9– OGND VDD GND ENC+ ENC– GND OF – OF + DB0_1– DB0_1+ DB2_3– DB2_3+ DB4_5– DB4_5+ DB6_7 – DB6_7+ OVDD 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Supply Voltage VDD, OVDD................................................. –0.3V to 2V Analog Input Voltage AINA/B+, AINA/B –, 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 LTC2157C, LTC2156C, LTC2155C............. 0°C to 70°C LTC2157I, LTC2156I, LTC2155I.............–40°C to 85°C Storage Temperature Range................... –65°C to 150°C UP PACKAGE 64-LEAD (9mm × 9mm) PLASTIC QFN TJMAX = 150°C, θJA = 20°C/W EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2157CUP-14#PBF LTC2157CUP-14#TRPBF LTC2157UP-14 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C LTC2157IUP-14#PBF LTC2157IUP-14#TRPBF LTC2157UP-14 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C LTC2156CUP-14#PBF LTC2156CUP-14#TRPBF LTC2156UP-14 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C LTC2156IUP-14#PBF LTC2156IUP-14#TRPBF LTC2156UP-14 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C LTC2155CUP-14#PBF LTC2155CUP-14#TRPBF LTC2155UP-14 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C LTC2155IUP-14#PBF LTC2155IUP-14#TRPBF LTC2155UP-14 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 2 21576514fb For more information www.linear.com/LTC2157-14 LTC2157-14/ LTC2156-14/LTC2155-14 CONVERTER CHARACTERISTICS l denotes the specifications which apply over the full operating The temperature range, otherwise specifications are at TA = 25°C. (Note 5) PARAMETER CONDITIONS MIN Resolution (No Missing Codes) l LTC2157-14 TYP MAX MIN 14 LTC2156-14 TYP MAX LTC2155-14 MIN TYP MAX 14 UNITS 14 Bits Integral Linearity Error Differential Analog Input (Note 6) l –5.5 ±0.85 5.5 –5.3 ±0.85 5.3 –5.1 ±0.85 5.1 LSB Differential Linearity Error Differential Analog Input l –0.9 ±0.25 0.9 –0.9 ±0.25 0.9 –0.9 ±0.25 0.9 LSB Offset Error (Note 7) l –13 ±5 13 –13 ±5 13 –13 ±5 13 mV Gain Error Internal Reference External Reference –4.0 ±1.5 ±1 –4.0 ±1.5 ±1 –4.0 ±1.5 ±1 2.2 %FS %FS l Offset Drift Full-Scale Drift Internal Reference External Reference Transition Noise 2.2 2.2 ±20 ±20 ±20 µV/°C ±30 ±10 ±30 ±10 ±30 ±10 ppm/°C ppm/°C 1.82 1.82 1.82 LSBRMS ANALOG INPUT The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP l VCM – 20mV VCM VCM + 20mV V l 1.200 1.250 1.300 V VIN Analog Input Range (AIN+ – AIN–) 1.7V < VDD < 1.9V l VIN(CM) Analog Input Common Mode (AIN+ + AIN–)/2 Differential Analog Input (Note 8) VSENSE External Voltage Reference Applied to SENSE External Reference Mode MAX UNITS 1.5 VP-P IIN1 Analog Input Leakage Current 0 < AIN+, AIN– < VDD, No Encode –1 1 µA IIN2 PAR/SER Input Leakage Current 0 < PAR/SER < VDD l –1 1 µA IIN3 SENSE Input Leakage Current 1.2V < SENSE < 1.3V l –1 1 µA tAP Sample-and-Hold Acquisition Delay Time 1 tJITTER Sample-and-Hold Acquisition Delay Jitter 0.15 CMRR Analog Input Common Mode Rejection Ratio BW-3B Full-Power Bandwidth l ns psRMS 75 dB 1250 MHz DYNAMIC ACCURACY The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5) SYMBOL PARAMETER CONDITIONS SNR Signal-to-Noise Ratio 15MHz Input 70MHz Input 140MHz Input SFDR Spurious Free Dynamic Range 15MHz Input 2nd or 3rd Harmonic 70MHz Input 140MHz Input Spurious Free Dynamic Range 15MHz Input 4th Harmonic or Higher 70MHz Input 140MHz Input S/(N+D) Signal-to-Noise Plus Distortion Ratio Crosstalk Crosstalk Between Channels 15MHz Input 70MHz Input 140MHz Input Up to 315MHz Input MIN l l l l LTC2157-14 TYP MAX 67.1 70 69.7 69 71 90 85 80 81 98 95 85 66.3 69.9 69.4 68.8 MIN LTC2156-14 TYP MAX 67.6 70 69.7 69 74 90 85 80 82 95 95 85 67.2 69.9 69.4 68.8 –95 –95 LTC2155-14 MIN TYP MAX UNITS 67.7 70 69.8 69.1 dBFS dBFS dBFS 76 90 85 80 dBFS dBFS dBFS 83 95 95 85 dBFS dBFS dBFS 67.3 69.9 69.4 68.5 dBFS dBFS dBFS –95 dB 21576514fb For more information www.linear.com/LTC2157-14 3 LTC2157-14/ LTC2156-14/LTC2155-14 INTERNAL REFERENCE CHARACTERISTICS l denotes the specifications which apply over the The full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) PARAMETER CONDITIONS VCM Output Voltage IOUT = 0 MIN TYP MAX 0.435 • VDD – 18mV 0.435 • VDD 0.435 • VDD + 18mV VCM Output Temperature Drift UNITS V ±37 VCM Output Resistance –1mA < IOUT < 1mA VREF Output Voltage IOUT = 0 ppm/°C 4 1.225 Ω 1.250 VREF Output Temperature Drift 1.275 V ±30 VREF Output Resistance –400µA < IOUT < 1mA VREF Line Regulation 1.7V < VDD < 1.9V ppm/°C 7 Ω 0.6 mV/V POWER REQUIREMENTS l denotes the specifications which apply over the full operating temperature The range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN VDD Analog Supply Voltage (Note 9) l 1.7 OVDD Output Supply Voltage (Note 9) l 1.7 IVDD Analog Supply Current IOVDD Digital Supply Current PDISS LTC2157-14 TYP MAX 1.8 MIN 1.9 1.7 1.7 LTC2156-14 TYP MAX 1.8 LTC2155-14 MIN TYP MAX 1.9 1.7 1.7 1.8 UNITS 1.9 V 1.8 1.9 1.8 1.9 1.8 1.9 V l 316 350 299 330 274 305 mA 1.75mA LVDS Mode 3.5mA LVDS Mode l l 45 76 50 85 43 73 49 84 41 71 48 83 mA mA Power Dissipation 1.75mA LVDS Mode 3.5mA LVDS Mode l l 650 706 720 783 616 670 682 745 567 621 635 698 mW mW PSLEEP Sleep Mode Power Clock Disabled Clocked at fS(MAX)