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LTC2254 Dataheets PDF



Part Number LTC2254
Manufacturers Linear Technology
Logo Linear Technology
Description Low Power 3V ADCs
Datasheet LTC2254 DatasheetLTC2254 Datasheet (PDF)

U U FEATURES ■ Sample Rate: 125Msps/105Msps ■ Single 3V Supply (2.85V to 3.4V) ■ Low Power: 395mW/320mW ■ 72.4dB SNR ■ 88dB SFDR ■ No Missing Codes ■ Flexible Input: 1VP-P to 2VP-P Range ■ 640MHz Full Power Bandwidth S/H ■ Clock Duty Cycle Stabilizer ■ Shutdown and Nap Modes ■ Pin Compatible Family 125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit) 105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit) 80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) 40Msps: LT.

  LTC2254   LTC2254


Document
U U FEATURES ■ Sample Rate: 125Msps/105Msps ■ Single 3V Supply (2.85V to 3.4V) ■ Low Power: 395mW/320mW ■ 72.4dB SNR ■ 88dB SFDR ■ No Missing Codes ■ Flexible Input: 1VP-P to 2VP-P Range ■ 640MHz Full Power Bandwidth S/H ■ Clock Duty Cycle Stabilizer ■ Shutdown and Nap Modes ■ Pin Compatible Family 125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit) 105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit) 80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) 40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit) 25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit) 10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) ■ 32-Pin (5mm × 5mm) U QFN Package APPLICATIO S ■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation LTC2255/LTC2254 14-Bit, 125/105Msps Low Power 3V ADCs DESCRIPTIO The LTC®2255/LTC2254 are 14-bit 125Msps/105Msps, low power 3V A/D converters designed for digitizing high frequency, wide dynamic range signals. The LTC2255/ LTC2254 are perfect for demanding imaging and communications applications with AC performance that includes 72.3dB SNR and 85dB SFDR for signals at the Nyquist frequency. DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and no missing codes over temperature. The transition noise is a low 1.3 LSBRMS. A single 3V supply allows low power operation. A separate output supply allows the outputs to drive 0.5V to 3.3V logic. A single-ended CLK input controls converter operation. An optional clock duty cycle stabilizer allows high performance at full speed for 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 APPLICATIO REFH REFL FLEXIBLE REFERENCE ANALOG INPUT + INPUT S/H – 14-BIT PIPELINED ADC CORE CORRECTION LOGIC CLOCK/DUTY CYCLE CONTROL CLK OUTPUT DRIVERS OVDD D13 • • • D0 OGND 22554 TA01a SNR (dBFS) LTC2255: SNR vs Input Frequency, –1dB, 2V Range, 125Msps 75 74 73 72 71 70 69 68 67 66 65 0 50 100 150 200 250 300 350 INPUT FREQUENCY (MHz) 33554 G09 22554fa 1 U U WW W LTC2255/LTC2254 ABSOLUTE AXI U RATI GS OVDD = VDD (Notes 1, 2) Supply Voltage (VDD) ................................................. 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 ............................................ 1500mW Operating Temperature Range LTC2255C, LTC2254C ............................. 0°C to 70°C LTC2255I, LTC2254I ...........................–40°C to 85°C Storage Temperature Range ..................–65°C to 125°C UW U PACKAGE/ORDER I FOR ATIO VDD VCM SENSE MODE OF D13 D12 D11 TOP VIEW ORDER PART NUMBER 32 31 30 29 28 27 26 25 AIN+ 1 24 D10 AIN– 2 23 D9 REFH 3 22 D8 REFH 4 REFL 5 33 21 OVDD 20 OGND REFL 6 19 D7 VDD 7 GND 8 18 D6 17 D5 9 10 11 12 13 14 15 16 CLK SHDN OE D0 D1 D2 D3 D4 UH PACKAGE 32-LEAD (5mm × 5mm) PLASTIC QFN TJMAX = 125°C, θJA = 34°C/W EXPOSED PAD (PIN 33) IS GND MUST BE SOLDERED TO PCB LTC2255CUH LTC2255IUH LTC2254CUH LTC2254IUH QFN PART* MARKING 2255 2254 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. *The temperature grade is identified by a label on the shipping container. CO VERTER CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4) PARAMETER Resolution (No Missing Codes) Integral Linearity Error Differential Linearity Error Offset Error Gain Error Offset Drift Full-Scale Drift Transition Noise CONDITIONS Differential Analog Input (Note 5) Differential Analog Input (Note 6) External Reference Internal Reference External Reference SENSE = 1V LTC2255 MIN TYP MAX ● 14 ● –5 ±1 5 ● –1 ±0.5 1 ● –12 ±2 12 ● –2.5 ±0.5 2.5 ±10 ±30 ±5 1.3 LTC2254 MIN TYP MAX 14 –5.5 ±1 5.5 –1 ±0.5 1 –12 ±2 12 –2.5 ±0.5 2.5 ±10 ±30 ±5 1.3 UNITS Bits LSB LSB mV %FS µV/°C ppm/°C ppm/°C LSBRMS 22554fa 2 LTC2255/LTC2254 U U A ALOG I PUT 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 tAP tJITTER CMRR PARAMETER Analog Input Range (AIN+ –AIN–) Analog Input Common Mode Analog Input Leakage Current SENSE Input Leakage MODE Pin Leakage Sample-and-Hold Acquisition Delay Time Sample-and-Hold Acquisition Delay Time Jitter Analog Input Common Mode Rejection Ratio Full Power Bandwidth CONDIT.


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