LTC2204CUK

LTC2205/LTC2204 16-Bit, 65Msps/40Msps ADCs DESCRIPTION FEATURES n n n n n n n n n n n n n Sample Rate: 65Msps/40Msps 79dB SNR and 100dB SFDR (2.25VP-P Range) SFDR >92dB 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: 610mW/480mW 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), LTC2205-14 (14-Bit) 40Msps: LTC2204 (16-Bit) 48-Pin (7mm × 7mm) QFN Package APPLICATIONS n n n n n n Telecommunications Receivers Cellular Base Stations Spectrum Analysis Imaging Systems ATE The LTC®2205/LTC2204 are sampling 16-bit A/D converters 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/LTC2204 are perfect for demanding communications applications, with AC performance that includes 79dB SNR and 100dB spurious free dynamic range (SFDR). Ultralow jitter of 90fsRMS allows undersampling of high input frequencies with excellent noise performance. Maximum DC specs include ±4LSB 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. TYPICAL APPLICATION 3.3V LTC2205: 64K Point FFT, fIN = 5.1MHz, –1dBFS, PGA = 0, DITH = 0 SENSE 2.2μF AIN+ 1.25V COMMON MODE BIAS VOLTAGE + ANALOG INPUT AIN– 16-BIT PIPELINED ADC CORE S/H AMP – OVDD INTERNAL ADC REFERENCE GENERATOR OUTPUT DRIVERS CORRECTION LOGIC AND SHIFT REGISTER 0.5V TO 3.6V 0.1μF 0 OF CLKOUT D15 • • • D0 –20 AMPLITUDE (dBFS) VCM OGND CLOCK/DUTY CYCLE CONTROL 3.3V VDD GND 0.1μF 0.1μF –40 –60 –80 –100 –120 0.1μF 22076 TA01 –140 0 ENC ENC PGA SHDN DITH MODE OE ADC CONTROL INPUTS RAND 5 20 15 25 10 FREQUENCY (MHz) 30 22054 TA01b 22054fc 1 LTC2205/LTC2204 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION OVDD = VDD (Notes 1 and 2) 48 GND 47 PGA 46 RAND 45 MODE 44 OE 43 OF 42 D15 41 D14 40 D13 39 D12 38 OGND 37 OVDD 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 LTC2205C/LTC2204C ............................... 0°C to 70°C LTC2205I/LTC2204I..............................–40°C to 85°C Storage Temperature Range ..................–65°C to 150°C Digital Output Supply Voltage (OVDD) .......... –0.3V to 4V SENSE 1 VCM 2 VDD 3 VDD 4 GND 5 AIN+ 6 AIN– 7 GND 8 ENC+ 9 ENC– 10 GND 11 VDD 12 36 OVDD 35 D11 34 D10 33 D9 32 D8 31 OGND 30 CLKOUT+ 29 CLKOUT– 28 D7 27 D6 26 D5 25 OVDD VDD 13 VDD 14 GND 15 SHDN 16 DITH 17 D0 18 D1 19 D2 20 D3 21 D4 22 OGND 23 OVDD 24 49 UK PACKAGE 48-LEAD (7mm s 7mm) PLASTIC QFN EXPOSED PAD IS GND (PIN 49) MUST BE SOLDERED TO PCB BOARD TJMAX = 150°C, θJA = 29°C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2205CUK#PBF LTC2205CUK#TRPBF LTC2205UK 48-Lead (7mm × 7mm) Plastic DFN 0°C to 70°C LTC2204CUK#PBF LTC2204CUK#TRPBF LTC2204UK 48-Lead (7mm × 7mm) Plastic DFN 0°C to 70°C LTC2205IUK#PBF LTC2205IUK#TRPBF LTC2205UK 48-Lead (7mm × 7mm) Plastic DFN –40°C to 85°C LTC2204IUK#PBF LTC2204IUK#TRPBF LTC2204UK 48-Lead (7mm × 7mm) Plastic DFN –40°C to 85°C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2205CUK LTC2205CUK#TR LTC2205UK 48-Lead (7mm × 7mm) Plastic DFN 0°C to 70°C LTC2204CUK LTC2204CUK#TR LTC2204UK 48-Lead (7mm × 7mm) Plastic DFN 0°C to 70°C LTC2205IUK LTC2205IUK#TR LTC2205UK 48-Lead (7mm × 7mm) Plastic DFN –40°C to 85°C LTC2204IUK LTC2204IUK#TR LTC2204UK 48-Lead (7mm × 7mm) Plastic DFN –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/ CONVERTER CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) PARAMETER CONDITIONS TYP MAX UNITS l ±0.7 ±4.5 LSB ±0.7 ±4 LSB ±0.3 ±1 LSB ±1 ±8.5 l Resolution (No Missing Codes) Integral Linearity Error MIN Differential Analog Input (Note 5) Integral Linearity Error Differential Analog Input (Note 5), TA = 25°C Differential Linearity Error Differential Analog Input l Offset Error (Note 6) l Offset Drift Bits ±10 Gain Error External Reference Full-Scale Drift Internal Reference External Reference Transition Noise 16 l ±0.2 mV μV/°C ±1.9 %FS ±30 ±10 ppm/°C ppm/°C 2.5 LSBRMS 22054fc 2 LTC2205/LTC2204 ANALOG INPUT The l 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 3.135V ≤ VDD ≤ 3.465V l 1 TYP MAX UNITS 1.5 to 2.25 VIN, CM Analog Input Common Mode Differential Input (Note 7) l IIN Analog Input Leakage Current 0V ≤ AIN+, AIN– ≤ VDD l –1 ISENSE SENSE Input Leakage Current 0V ≤ SENSE ≤ VDD l –3 IMODE MODE Pin Pull-Down Current to GND Sample Mode ENC+ < ENC– Hold Mode ENC+ > ENC– 1.25 VP-P 1.5 V 1 μA 3 μA 10 μA 6.5 1.8 pF pF CIN Analog Input Capacitance tAP Sample-and-Hold Aperture Delay Time 0.7 ns tJITTER Sample-and-Hold Aperture Delay Time Jitter 90 fsRMS CMRR Analog Input Common Mode Rejection Ratio 60 dB BW-3dB Full Power Bandwidth 700 MHz 1V < (AIN+ = AIN–)