LTC2217IUP

LTC2217 16-Bit, 105Msps Low Noise ADC FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTION The LTC®2217 is a 105Msps sampling 16-bit A/D converter designed for digitizing high frequency, wide dynamic range signals with input frequencies up to 400MHz. The input range of the ADC is fixed at 2.75VP-P. Sample Rate: 105Msps 81.3dBFS Noise Floor 100dB SFDR SFDR >90dB at 70MHz 85fsRMS Jitter 2.75VP-P Input Range 400MHz Full Power Bandwidth S/H Optional Internal Dither Optional Data Output Randomizer LVDS or CMOS Outputs Single 3.3V Supply Power Dissipation: 1.19W Clock Duty Cycle Stabilizer Pin Compatible with LTC2208 64-Pin (9mm × 9mm) QFN Package The LTC2217 is perfect for demanding communications applications, with AC performance that includes 81.3dBFS Noise Floor and 100dB spurious free dynamic range (SFDR). Ultra low jitter of 85fsRMS allows undersampling of high input frequencies while maintaining excellent noise performance. Maximum DC specifications include ±3.5LSB INL, ±1LSB DNL (no missing codes). The digital output can be either differential LVDS or single-ended CMOS. There are two format options for the CMOS outputs: a single bus running at the full data rate or demultiplexed buses running at half data rate. A separate output power supply allows the CMOS output swing to range from 0.5V to 3.6V. APPLICATIONS ■ ■ ■ ■ ■ ■ Telecommunications Receivers Cellular Base Stations Spectrum Analysis Imaging Systems ATE The ENC+ and ENC– inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed with a wide range of clock duty cycles. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents Pending. TYPICAL APPLICATION 3.3V SENSE 2.2μF AIN+ 1.575V COMMON MODE BIAS VOLTAGE + ANALOG INPUT AIN– INTERNAL ADC REFERENCE GENERATOR 16-BIT PIPELINED ADC CORE S/H AMP – 64k Point FFT, FIN = 4.9MHz, –1dBFS 0.5V TO 3.6V 1μF OF CLKOUT D15 • • • D0 OUTPUT DRIVERS CORRECTION LOGIC AND SHIFT REGISTER AMPLITUDE (dBFS) VCM OVDD CMOS OR LVDS OGND CLOCK/DUTY CYCLE CONTROL 3.3V VDD GND 1μF 1μF 1μF 2217 TA01 ENC + ENC – SHDN DITH MODE LVDS ADC CONTROL INPUTS RAND 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 0 10 20 40 30 FREQUENCY (MHz) 50 2217 TA01b 2217f 1 LTC2217 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION OVDD = VDD (Notes 1 and 2) TOP VIEW 64 NC 63 RAND 62 MODE 61 LVDS 60 OF+/OFA 59 OF–/DA15 58 D15+/DA14 57 D15–/DA13 56 D14+/DA12 55 D14–/DA11 54 D13+/DA10 53 D13–/DA9 52 D12+/DA8 51 D12–/DA7 50 OGND 49 OVDD Supply Voltage (VDD) ................................... –0.3V to 4V Digital Output Ground Voltage (OGND)........ –0.3V to 1V Analog Input Voltage (Note 3) ..... –0.3V to (VDD + 0.3V) Digital Input Voltage .................... –0.3V to (VDD + 0.3V) Digital Output Voltage ................–0.3V to (OVDD + 0.3V) Power Dissipation............................................ 2000mW Operating Temperature Range LTC2217C ................................................ 0°C to 70°C LTC2217I .............................................–40°C to 85°C Storage Temperature Range ..................–65°C to 150°C Digital Output Supply Voltage (OVDD) .......... –0.3V to 4V SENSE 1 GND 2 VCM 3 GND 4 VDD 5 VDD 6 GND 7 AIN+ 8 AIN– 9 GND 10 GND 11 ENC+ 12 ENC– 13 GND 14 VDD 15 VDD 16 48 D11+/DA6 47 D11–/DA5 46 D10+/DA4 45 D10–/DA3 44 D9+/DA2 43 D9–/DA1 42 D8+/DA0 41 D8–/CLKOUTA 40 CLKOUT+/CLKOUTB 39 CLKOUT –/OFB 38 D7+/DB15 37 D7–/DB14 36 D6+/DB13 35 D6–/DB12 34 D5+/DB11 33 D5–/DB10 VDD 17 GND 18 SHDN 19 DITH 20 D0–/DB0 21 +/DB1 22 DO D1–/DB2 23 D1+/DB3 24 D2–/DB4 25 D2+/DB5 26 D3–/DB6 27 D3+/DB7 28 D4–/DB8 29 D4+/DB9 30 OGND 31 OVDD 32 65 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 LTC2217CUP#PBF LTC2217IUP#PBF LTC2217CUP#TRPBF LTC2217IUP#TRPBF LTC2217UP LTC2217UP 64-Lead (9mm × 9mm) Plastic QFN 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C –40°C to 85°C LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2217CUP LTC2217IUP LTC2217CUP#TR LTC2217IUP#TR LTC2217UP LTC2217UP 64-Lead (9mm × 9mm) Plastic QFN 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. 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/ CONVERTER CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) PARAMETER CONDITIONS Integral Linearity Error Differential Analog Input (Note 5) TA = 25°C Integral Linearity Error Differential Analog Input (Note 5) Differential Linearity Error Offset Error MIN TYP MAX UNITS ±1.3 ±3.5 LSB ● ±1.3 ±4 LSB Differential Analog Input ● 0.18/–0.22 ±1 LSB (Note 6) ● ±1.3 ±6 mV Gain Error External Reference ● ±0.3 Full-Scale Drift Internal Reference External Reference –65 ±12 ppm/°C ppm/°C Transition Noise External Reference 2 LSBRMS Offset Drift ±4 μV/°C ±1 %FS 2217f 2 LTC2217 ANALOG INPUT The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) SYMBOL PARAMETER CONDITIONS VIN Analog Input Range (AIN+ – AIN–) MIN TYP 3.135V ≤ VDD ≤ 3.465V VIN, CM Analog Input Common Mode Differential Input (Note 7) ● 1.2 1.575 Analog Input Leakage Current 0V ≤ AIN+, AIN– ≤ VDD IIN ● ISENSE SENSE Input Leakage Current 0V ≤ SENSE ≤ VDD ● IMODE MODE Pin Pull-Down Current to GND ILVDS LVDS Pin Pull-Down Current to GND CIN Analog Input Capacitance tAP Sample-and-Hold Acquisition Delay Time tJITTER Sample-and-Hold Aperture Jitter CMRR Analog Input Common Mode Rejection Ratio BW-3dB Full Power Bandwidth MAX UNITS 2.75 VP-P 1.8 V –1 1 μA –3 3 μA Sample Mode ENC+ < ENC– Hold Mode ENC+ > ENC– 10 μA 10 μA 9.1 1.8 pF pF 0.35 ns 85 fs RMS 1.2V < (AIN+ = AIN–)