LTC2229 12-Bit, 80Msps Low Power 3V ADC UFEATURESDESCRIPTIO ■ Sample Rate: 80Msps The LTC®2229 is a 12-bit 80Msps, low power 3V A/D ■ Single 3V Supply (2.7V to 3.4V) converter designed for digitizing high frequency, wide ■ Low Power: 211mW dynamic range signals. The LTC2229 is perfect for de- ■ 70.6dB SNR at 70MHz Input manding imaging and communications applications with ■ 90dB SFDR at 70MHz Input AC performance that includes 70.6dB SNR and 90dB ■ No Missing Codes SFDR for signals well beyond the Nyquist frequency. ■ Flexible Input: 1VP-P to 2VP-P Range DC specs include ±0.4LSB INL (typ), ±0.2LSB DNL (typ) ■ 575MHz Full Power Bandwidth S/H and no missing codes over temperature. The transition ■ Clock Duty Cycle Stabilizer noise is a low 0.3LSB ■ Shutdown and Nap Modes RMS. ■ Pin Compatible Family A single 3V supply allows low power operation. A separate 125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit) output supply allows the outputs to drive 0.5V to 3.6V 105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit) logic. 80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) A single-ended CLK input controls converter operation. An 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) optional clock duty cycle stabilizer allows high perfor- 40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit) mance at full speed for a wide range of clock duty cycles. 25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit) 10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ■ 32-Pin (5mm × 5mm) QFN Package UAPPLICATIO S ■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation UTYPICAL APPLICATIOSNR vs Input Frequency,–1dB, 2V Range 75 REFH FLEXIBLE 74 REFL REFERENCE 73 OVDD 72 + D11 71 12-BIT • ANALOG INPUT CORRECTION OUTPUT PIPELINED • 70 INPUT S/H LOGIC DRIVERS ADC CORE • – SNR (dBFS) 69 D0 68 OGND 67 66 CLOCK/DUTY CYCLE 65 CONTROL 0 50 100 150 200 INPUT FREQUENCY (MHz) 2229 TA01 2229 G09 CLK 2229fa 1
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