Datasheet LTC2255, LTC2254 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 14-Bit, 125Msps Low Power 3V ADCs |
| Seiten / Seite | 24 / 1 — FEATURES. DESCRIPTIO. Sample Rate: 125Msps/105Msps. Single 3V Supply … |
| Dateiformat / Größe | PDF / 640 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. Sample Rate: 125Msps/105Msps. Single 3V Supply (2.85V to 3.4V). Low Power: 395mW/320mW. 72.4dB SNR. 88dB SFDR
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LTC2255/LTC2254 14-Bit, 125/105Msps Low Power 3V ADCs
U FEATURES DESCRIPTIO
■
Sample Rate: 125Msps/105Msps
The LTC®2255/LTC2254 are 14-bit 125Msps/105Msps, ■
Single 3V Supply (2.85V to 3.4V)
low power 3V A/D converters designed for digitizing high ■
Low Power: 395mW/320mW
frequency, wide dynamic range signals. The LTC2255/ ■
72.4dB SNR
LTC2254 are perfect for demanding imaging and commu- ■
88dB SFDR
nications applications with AC performance that includes ■ No Missing Codes 72.3dB SNR and 85dB SFDR for signals at the Nyquist ■ Flexible Input: 1VP-P to 2VP-P Range frequency. ■ 640MHz Full Power Bandwidth S/H DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and ■ Clock Duty Cycle Stabilizer no missing codes over temperature. The transition noise ■ Shutdown and Nap Modes is a low 1.3 LSB ■ Pin Compatible Family RMS. 125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit) A single 3V supply allows low power operation. A separate 105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit) output supply allows the outputs to drive 0.5V to 3.3V 80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) logic. 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) A single-ended CLK input controls converter operation. An 40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit) optional clock duty cycle stabilizer allows high perfor- 25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit) mance at full speed for a wide range of clock duty cycles. 10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ■ 32-Pin (5mm × 5mm) QFN Package All other trademarks are the property of their respective owners.
U APPLICATIO S
■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation
U TYPICAL APPLICATIO LTC2255: SNR vs Input Frequency, –1dB, 2V Range, 125Msps
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 50 100 150 200 250 300 350 22554 TA01a INPUT FREQUENCY (MHz) 33554 G09 CLK 22554fa 1
U FEATURES DESCRIPTIO
■
Sample Rate: 125Msps/105Msps
The LTC®2255/LTC2254 are 14-bit 125Msps/105Msps, ■
Single 3V Supply (2.85V to 3.4V)
low power 3V A/D converters designed for digitizing high ■
Low Power: 395mW/320mW
frequency, wide dynamic range signals. The LTC2255/ ■
72.4dB SNR
LTC2254 are perfect for demanding imaging and commu- ■
88dB SFDR
nications applications with AC performance that includes ■ No Missing Codes 72.3dB SNR and 85dB SFDR for signals at the Nyquist ■ Flexible Input: 1VP-P to 2VP-P Range frequency. ■ 640MHz Full Power Bandwidth S/H DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and ■ Clock Duty Cycle Stabilizer no missing codes over temperature. The transition noise ■ Shutdown and Nap Modes is a low 1.3 LSB ■ Pin Compatible Family RMS. 125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit) A single 3V supply allows low power operation. A separate 105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit) output supply allows the outputs to drive 0.5V to 3.3V 80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit) logic. 65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit) A single-ended CLK input controls converter operation. An 40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit) optional clock duty cycle stabilizer allows high perfor- 25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit) mance at full speed for a wide range of clock duty cycles. 10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ■ 32-Pin (5mm × 5mm) QFN Package All other trademarks are the property of their respective owners.
U APPLICATIO S
■ Wireless and Wired Broadband Communication ■ Imaging Systems ■ Ultrasound ■ Spectral Analysis ■ Portable Instrumentation
U TYPICAL APPLICATIO LTC2255: SNR vs Input Frequency, –1dB, 2V Range, 125Msps
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 50 100 150 200 250 300 350 22554 TA01a INPUT FREQUENCY (MHz) 33554 G09 CLK 22554fa 1