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LTC6247 Datasheet(PDF) 1 Page - Linear Technology |
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LTC6247 Datasheet(HTML) 1 Page - Linear Technology |
1 / 24 page LT6236/LT6237 1 623637f TYPICAL APPLICATION FEATURES DESCRIPTION Rail-to-Rail Output 215MHz, 1.1nV/√Hz Op Amp/SAR ADC Driver The LT®6236/LT6237 are single/dual low noise, rail-to-rail output op amps that feature 1.1nV/√Hz input referred noise voltage density and draw only 3.5mA of supply current per amplifier. These amplifiers combine very low noise and supply current with a 215MHz gain bandwidth product and a 70V/μs slew rate. Low noise, fast settling time and low offset voltage make this amplifier optimal to drive low noise, high speed SAR ADCs. The LT6236 includes a shutdown feature that can be used to reduce the supply current to less than 10μA. This amplifier family has an output that swings within 50mV of either supply rail to maximize the signal dynamic range in low supply applications and is specified on 3.3V, 5V and ±5V supplies. The LT6236/LT6237 are upgrades to the LT6230/LT6231, offering similar performance with reduced wideband noise beyond 100kHz. Differentially Driving a SAR ADC LT6237 Driving LTC2389-18 fIN = 2kHz, –1dBFS, 32768-Point FFT APPLICATIONS n Low Noise: 1.1nV/√Hz n Low Supply Current: 3.5mA/Amp Max n Low Offset Voltage: 350μV Max n Fast Settling Time: 570ns to 18-Bit, 2VP-P Output n Low Distortion: THD = –116.8dB at 2kHz n Wide Supply Range: 3V to 12.6V n Output Swings Rail-to-Rail n 215MHz Gain-Bandwidth Product n Specified Temperature Range: –40°C to 125°C n LT6236 Shutdown to 10μA Max n LT6236 in Low Profile (1mm) ThinSOT™ Package n Dual LT6237 in 3mm × 3mm 8-Lead DFN and 8-Lead MSOP Packages n 16-Bit and 18-Bit SAR ADC Drivers n Active Filters n Low Noise, Low Power Signal Processing L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 623637 TA01a IN– IN– IN+ IN+ VS += 6V 270pF 38.3Ω 38.3Ω LOWPASS FILTERS LTC2389-18 270pF 49.9Ω 49.9Ω 18-BIT 2.5Msps – + + – 1/2 LT6237 1/2 LT6237 VS –= –2V FREQUENCY (MHz) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 62367 TA01b 0 –150 –140 –130 –120 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 1.2 VOUT = 7.3VP-P HD2 = –129.5dBc HD3 = –118.7dBc SFDR = 117.7dB THD = –116.8dB SNR = 99.7dB SINAD = 98.9dB |
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