LTC2205-14

LTC2205-14 14-Bit, 65Msps ADC FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO ■ Sample Rate: 65Msps 78.3dB SNR and 98dB SFDR (2.25VP-P Range) SFDR >90dB at 140MHz (1.5VP-P Input Range) PGA Front End (2.25VP-P or 1.5VP-P Input Range) 700MHz Full Power Bandwidth S/H Optional Internal Dither Optional Data Output Randomizer Single 3.3V Supply Power Dissipation: 600mW Optional Clock Duty Cycle Stabilizer Out-of-Range Indicator Pin Compatible Family 105Msps: LTC2207 (16-Bit), LTC2207-14 (14-Bit) 80Msps: LTC2206 (16-Bit), LTC2206-14 (14-Bit) 65Msps: LTC2205 (16-Bit) 40Msps: LTC2204 (16-Bit) 48-Pin (7mm × 7mm) QFN Package The LTC®2205-14 is a sampling 14-bit A/D converter designed for digitizing high frequency, wide dynamic range signals up to input frequencies of 700MHz. The input range of the ADC can be optimized with the PGA front end. The LTC2205-14 is perfect for demanding communications applications, with AC performance that includes 78.3dB SNR and 98dB spurious free dynamic range (SFDR). Ultralow jitter of 90fsRMS allows undersampling of high input frequencies with excellent noise performance. Maximum DC specs include ±1.5LSB INL, ±1LSB DNL (no missing codes). A separate output power supply allows the CMOS output swing to range from 0.5V to 3.6V. 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. APPLICATIO S ■ ■ ■ ■ ■ ■ Telecommunications Receivers Cellular Base Stations Spectrum Analysis Imaging Systems ATE TYPICAL APPLICATIO 3.3V SENSE VCM 2.2µF AIN+ ANALOG INPUT AIN– 1.25V COMMON MODE BIAS VOLTAGE INTERNAL ADC REFERENCE GENERATOR OVDD 0.5V TO 3.6V 0.1µF OF CLKOUT D13 • • • D0 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 0 S/H AMP – 14-BIT PIPELINED ADC CORE CORRECTION LOGIC AND SHIFT REGISTER OUTPUT DRIVERS OGND CLOCK/DUTY CYCLE CONTROL VDD GND ENC ENC PGA SHDN DITH MODE OE RAND 0.1µF 0.1µF 220514 TA01 3.3V 0.1µF AMPLITUDE (dBFS) + ADC CONTROL INPUTS U LTC2205-14: 32K Point FFT, fIN = 5.1MHz, –1dBFS, PGA = 0, DITH = 0 5 10 20 25 15 FREQUENCY (MHz) 30 220514 G04 U U 220514fa 1 LTC2205-14 ABSOLUTE MAXIMUM RATINGS OVDD = VDD (Notes 1 and 2) PACKAGE/ORDER INFORMATION 48 GND 47 PGA 46 RAND 45 MODE 44 OE 43 OF 42 D13 41 D12 40 D11 39 D10 38 OGND 37 OVDD SENSE 1 VCM 2 VDD 3 VDD 4 GND 5 AIN+ 6 AIN– 7 GND 8 ENC+ 9 ENC– 10 GND 11 VDD 12 49 36 OVDD 35 D9 34 D8 33 D7 32 D6 31 OGND 30 CLKOUT+ 29 CLKOUT– 28 D5 27 D4 26 D3 25 OVDD UK PACKAGE 48-LEAD (7mm × 7mm) PLASTIC QFN TJMAX = 125°C, θJA = 29°C/W EXPOSED PAD IS GND (PIN 49), MUST BE SOLDERED TO PCB BOARD TOP VIEW 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 LTC2205-14C ........................................... 0°C to 70°C LTC2205-14I ........................................ –40°C to 85°C Storage Temperature Range .................. –65°C to 150°C Digital Output Supply Voltage (OVDD) .......... –0.3V to 4V ORDER PART NUMBER LTC2205CUK-14 LTC2205IUK-14 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges. CONVERTER CHARACTERISTICS PARAMETER Resolution (No Missing Codes) Integral Linearity Error Differential Linearity Error Offset Error Offset Drift Gain Error Full-Scale Drift Transition Noise The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) CONDITIONS ● VDD 13 VDD 14 GND 15 SHDN 16 DITH 17 NC 18 NC 19 D0 20 D1 21 D2 22 OGND 23 OVDD 24 UK PART MARKING LTC2205UK-14 LTC2205UK-14 MIN 14 ● ● ● ● TYP ±0.6 ±0.2 ±1 ±10 ±0.3 ±30 ±10 0.7 MAX ±1.5 ±1 ±8.5 ±1.9 UNITS Bits LSB LSB mV V/°C %FS ppm/°C ppm/°C Differential Analog Input (Note 5) Differential Analog Input (Note 6) External Reference Internal Reference External Reference LSBRMS 220514fa 2 LTC2205-14 The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) SYMBOL VIN VIN, CM IIN ISENSE IMODE CIN tAP tJITTER CMRR BW-3dB PARAMETER Analog Input Range (AIN+ – AIN–) Analog Input Common Mode Analog Input Leakage Current SENSE Input Leakage Current MODE Pin Pull-Down Current to GND Analog Input Capacitance Sample-and-Hold Aperature Delay Time Sample-and-Hold Aperature Delay Time Jitter Analog Input Common Mode Rejection Ratio Full Power Bandwidth CONDITIONS 3.135V ≤ VDD ≤ 3.465V Differential Input (Note 7) 0V ≤ AIN+, AIN– ≤ VDD 0V ≤ SENSE ≤ VDD Sample Mode ENC+ < ENC– Hold Mode ENC+ > ENC– MIN ● ● ● ● ANALOG INPUT 1 –1 –3 TYP 1.5 to 2.25 1.25 MAX 1.5 1 3 10 6.5 1.8 0.7 90 UNITS VP-P V µA µA µA pF pF ns fsRMS dB MHz 1V < (AIN+ = AIN–)