LTC6362 Precision, Low Power Rail-to-Rail Input/Output Differential Op Amp/SAR ADC Driver FEATURESDESCRIPTION n 1mA Supply Current The LTC®6362 is a low power, low noise differential op n Single 2.8V to 5.25V supply amp with rail-to-rail input and output swing that has been n Fully Differential Input and Output optimized to drive low power SAR ADCs. The LTC6362 n 200μV Max Offset Voltage draws only 1mA of supply current in active operation, and n 260nA Max Input Bias Current features a shutdown mode in which the current consump- n Fast Settling: 550ns to 18-Bit, 8VP-P Output tion is reduced to 70μA. n Low Distortion: –116dBc at 1kHz, 8VP-P The amplifier may be configured to convert a single- n Rail-to-Rail Inputs and Outputs ended input signal to a differential output signal, and is n 3.9nV/√Hz Input-Referred Noise capable of being operated in an inverting or noninverting n 180MHz Gain-Bandwidth Product configuration. n 34MHz –3dB Bandwidth n Low Power Shutdown: 70µA Low offset voltage, low input bias current, and a stable n 8-Lead MSOP and 3mm × 3mm 8-Lead DFN Packages high impedance configuration make this amplifier suit- able for use not only as an ADC driver but also earlier in APPLICATIONS the signal chain, to convert a precision sensor signal to n a balanced (differential) signal for processing in noisy 16-Bit and 18-Bit SAR ADC Drivers n industrial environments. Single-Ended-to-Differential Conversion n Low Power Pipeline ADC Driver The LTC6362 is available in an 8-lead MSOP package and n Differential Line Drivers also in a compact 3mm × 3mm 8-pin leadless DFN pack- n Battery-Powered Instrumentation age, and operates with guaranteed specifications over a L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear –40°C to 125°C temperature range. Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIONLTC6362 Driving LTC2379-18fIN = 2kHz, –1dBFS, 16384-Point FFTDC-Coupled Interface from a Ground-Referenced 0 Single-Ended Input to an LTC2379-18 SAR ADC –10 VS = 5V, 0V –20 VOUTDIFF = 8.9VP-P –30 HD2 = –116.0dBc 1k HD3 = –114.9dBc 5V 2.5V –40 SFDR = 110.1dB 5V 3.9nF –50 THD = –108.0dB –60 SNR = 101.2dB 1k 35.7Ω VREF VDD – + –70 A + SINAD = 99.9dB IN 18-BIT VOCM –80 VIN LTC6362 3.9nF LTC2379-18 –90 0.1µF SHDN 35.7Ω SAR ADC + – –100 A – AMPLITUDE (dBFS) IN 1.6Msps –110 3.9nF GND –120 1k 1k 6362 TA01a –130 –140 –150 0 100 200 300 400 500 600 700 800 FREQUENCY (kHz) 6362 TA01b 6362fa 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
