LTC2155CUP-12#TRPBF

LTC2157-12/ LTC2156-12/LTC2155-12 Dual 12-Bit 250Msps/ 210Msps/170Msps ADCs FEATURES DESCRIPTION n n n n n n n n n n n The LTC®2157-12/LTC2156-12/LTC2155-12 are a family of dual 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 achieve high undersampling ratio with very low attenuation. The latency is only six clock cycles. n 68.5dB SNR 90dB SFDR Low Power: 628mW/592mW/545mW 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 14-Bit Versions 64-Lead (9mm × 9mm) QFN Package 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. APPLICATIONS 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 VDD CLOCK ANALOG INPUT S/H CLOCK/DUTY CYCLE CONTROL S/H 12-BIT PIPELINED ADC CORE CORRECTION LOGIC OUTPUT DRIVERS DA10_11 • • • DA0_1 OGND OVDD CHANNEL B 12-BIT PIPELINED ADC CORE CORRECTION LOGIC OUTPUT DRIVERS DB10_11 • • • DB0_1 –20 –40 –60 –80 –100 DDR LVDS GND 21576512 TA01 0 DDR LVDS AMPLITUDE (dBFS) ANALOG INPUT LTC2157-12: 32K Points 2-Tone FFT, fIN = 71MHZ and 69MHz, 250Msps OVDD CHANNEL A OGND –120 0 20 40 60 80 100 FREQUENCY (MHz) 120 21576512 G11 21576512fb For more information www.linear.com/LTC2157-12 1 LTC2157-12/ LTC2156-12/LTC2155-12 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 DA2_3+ DA2_3– DA0_1+ DA0_1– NC NC CLKOUT+ CLKOUT– DB10_11+ DB10_11– DB8_9+ DB8_9– DB6_7+ DB6_7– OGND VDD GND ENC+ ENC– GND OF – OF + NC NC DB0_1– DB0_1+ DB2_3– DB2_3+ DB4_5 – DB4_5+ 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 PIN CONFIGURATION VDD PAR/SER CS SCK SDI SDO GND DA10_11+ DA10_11– DA8_9+ DA8_9– DA6_7+ DA6_7– DA4_5+ DA4_5 – OVDD (Notes 1, 2) 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 ABSOLUTE MAXIMUM RATINGS 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-12#PBF LTC2157CUP-12#TRPBF LTC2157UP-12 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C LTC2157IUP-12#PBF LTC2157IUP-12#TRPBF LTC2157UP-12 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C LTC2156CUP-12#PBF LTC2156CUP-12#TRPBF LTC2156UP-12 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C LTC2156IUP-12#PBF LTC2156IUP-12#TRPBF LTC2156UP-12 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C LTC2155CUP-12#PBF LTC2155CUP-12#TRPBF LTC2155UP-12 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C LTC2155IUP-12#PBF LTC2155IUP-12#TRPBF LTC2155UP-12 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/ 21576512fb 2 For more information www.linear.com/LTC2157-12 LTC2157-12/ LTC2156-12/LTC2155-12 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 LTC2157-12 TYP MAX MIN 12 LTC2156-12 TYP MAX LTC2155-12 MIN TYP MAX 12 UNITS 12 Bits Integral Linearity Error Differential Analog Input (Note 6) l –2.3 ±0.26 2.3 –2.2 ±0.30 2.2 –1.9 ±0.30 1.9 LSB Differential Linearity Error Differential Analog Input l –0.6 ±0.16 0.8 –0.6 ±0.16 0.6 –0.6 ±0.16 0.6 LSB Offset Error (Note 7) l –13 ±5 13 –13 ±5 13 –13 ±5 13 mV Gain Error External Reference l –4 ±1 2.2 –4 ±1 2.2 –4 ±1 2.2 %FS Offset Drift Full-Scale Drift Internal Reference External Reference Transition Noise ±20 ±20 ±20 µV/°C ±30 ±10 ±30 ±10 ±30 ±10 ppm/°C ppm/°C 0.54 0.54 0.54 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 MAX UNITS 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) l VCM – 20mV VCM VCM + 20mV V VSENSE External Voltage Reference Applied to SENSE External Reference Mode l 1.200 1.250 1.300 V 1.5 VP-P IIN1 Analog Input Leakage Current 0 < AIN+, AIN– < VDD, No Encode l –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 ns CMRR Analog Input Common Mode Rejection Ratio BW-3B Full-Power Bandwidth 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) Crosstalk Signal-to-Noise Plus Distortion Ratio Crosstalk Between Channels 15MHz Input 70MHz Input 140MHz Input Up to 315MHz Input MIN l l l l LTC2157-12 TYP MAX 66.9 68.5 68.4 68.0 71 90.6 88 80 81 98 95 85 66.1 68.4 68.3 67.7 MIN LTC2156-12 TYP MAX 67.3 68.5 68.3 67.9 74 90.1 89 81 82 98 95 87 66.7 68.4 68.3 67.7 –95 –95 LTC2155-12 MIN TYP MAX UNITS 67.4 68.5 68.3 67.8 dBFS dBFS dBFS 75 90 88 80 dBFS dBFS dBFS 83 98 95 88 dBFS dBFS dBFS 66.8 68.4 68.3 67.7 dBFS dBFS dBFS –95 dB 21576512fb For more information www.linear.com/LTC2157-12 3 LTC2157-12/ LTC2156-12/LTC2155-12 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 ±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 V 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 LTC2157-12 TYP MAX MIN LTC2156-12 TYP MAX LTC2155-12 MIN TYP MAX UNITS VDD Analog Supply Voltage (Note 9) l 1.7 1.8 1.9 1.7 1.8 1.9 1.7 1.8 1.9 V OVDD Output Supply Voltage (Note 9) l 1.7 1.8 1.9 1.7 1.8 1.9 1.7 1.8 1.9 V IVDD Analog Supply Current l 309 345 291 320 266 295 mA IOVDD Digital Supply Current 1.75mA LVDS Mode 3.5mA LVDS Mode l l 40 68 46 76 38 66 45 75 37 65 42 74 mA mA PDISS Power Dissipation 1.75mA LVDS Mode 3.5mA LVDS Mode l l 628 679 704 758 592 643 657 711 545 596 607 665 mW mW PSLEEP Sleep Mode Power Clock Disabled Clocked at fS(MAX)