Datasheet LTC2249 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 14-Bit, 80Msps Low Power 3V ADC |
| 页数 / 页 | 24 / 1 — FEATURES. DESCRIPTIO. Sample Rate: 80Msps. Single 3V Supply (2.7V to … |
| 文件格式/大小 | PDF / 565 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTIO. Sample Rate: 80Msps. Single 3V Supply (2.7V to 3.4V). Low Power: 222mW. 73dB SNR at 70MHz Input
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LTC2249 14-Bit, 80Msps Low Power 3V ADC
U FEATURES DESCRIPTIO
■
Sample Rate: 80Msps
The LTC®2249 is a 14-bit 80Msps, low power 3V A/D ■
Single 3V Supply (2.7V to 3.4V)
converter designed for digitizing high frequency, wide ■
Low Power: 222mW
dynamic range signals. The LTC2249 is perfect for de- ■
73dB SNR at 70MHz Input
manding imaging and communications applications with ■
90dB SFDR at 70MHz Input
AC performance that includes 73dB SNR and 90dB SFDR ■ No Missing Codes for signals well beyond the Nyquist frequency. ■ Flexible Input: 1VP-P to 2VP-P Range DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and ■ 575MHz Full Power Bandwidth S/H no missing codes over temperature. The transition noise ■ Clock Duty Cycle Stabilizer is a low 1.2LSB ■ 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
U APPLICATIO S
■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation
U TYPICAL APPLICATIO SNR vs Input Frequency, –1dB, 2V Range
REFH 75 FLEXIBLE REFL REFERENCE 74 OV 73 DD 72 + D13 14-BIT • 71 ANALOG INPUT CORRECTION OUTPUT PIPELINED • INPUT S/H LOGIC DRIVERS ADC CORE 70 • – D0 SNR (dBFS) 69 OGND 68 67 CLOCK/DUTY 66 CYCLE CONTROL 65 0 50 100 150 200 INPUT FREQUENCY (MHz) 2229 TA01 CLK 2249 G09 2249fa 1
U FEATURES DESCRIPTIO
■
Sample Rate: 80Msps
The LTC®2249 is a 14-bit 80Msps, low power 3V A/D ■
Single 3V Supply (2.7V to 3.4V)
converter designed for digitizing high frequency, wide ■
Low Power: 222mW
dynamic range signals. The LTC2249 is perfect for de- ■
73dB SNR at 70MHz Input
manding imaging and communications applications with ■
90dB SFDR at 70MHz Input
AC performance that includes 73dB SNR and 90dB SFDR ■ No Missing Codes for signals well beyond the Nyquist frequency. ■ Flexible Input: 1VP-P to 2VP-P Range DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and ■ 575MHz Full Power Bandwidth S/H no missing codes over temperature. The transition noise ■ Clock Duty Cycle Stabilizer is a low 1.2LSB ■ 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
U APPLICATIO S
■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation
U TYPICAL APPLICATIO SNR vs Input Frequency, –1dB, 2V Range
REFH 75 FLEXIBLE REFL REFERENCE 74 OV 73 DD 72 + D13 14-BIT • 71 ANALOG INPUT CORRECTION OUTPUT PIPELINED • INPUT S/H LOGIC DRIVERS ADC CORE 70 • – D0 SNR (dBFS) 69 OGND 68 67 CLOCK/DUTY 66 CYCLE CONTROL 65 0 50 100 150 200 INPUT FREQUENCY (MHz) 2229 TA01 CLK 2249 G09 2249fa 1