Datasheet LT6350 (Analog Devices)

LT6350 Low Noise Single-Ended to Differential Converter/ADC Driver
FeaTures DescripTion
n Rail-to-Rail Input and Outputs The LT®6350 is a rail-to-rail input and output low noise n Fast Settling Time: 240ns, 0.01%, 8VP-P Output Step single-ended to differential converter/ADC driver featuring n 1.9nV/√Hz Input-Referred Op Amp Noise fast settling time. It converts a high or low impedance, n High Impedance Input single-ended input signal to a low impedance, balanced, n –3dB Bandwidth: 33MHz differential output suitable for driving high performance n 2.7V to 12V Supply Operation differential succesive approximation register (SAR) ADCs. n No External Gain Resistors Required The two op amp topology features very low noise op amps, n 4.8mA Supply Current that can support SNR >110dB in a 1MHz bandwidth. n Low Power Shutdown The input op amp is trimmed for constant low input-referred n Low Distortion (HD2/HD3): –102dBc/–97dBc at voltage offset over the input range to prevent VOS steps 100kHz, VOUTDIFF = 4VP-P from degrading distortion. n Low Offset Voltage: ±400µV Max n High DC Linearity: <±1LSB, 16-Bit, 8V On a single 5V supply, the outputs can swing from 55mV to P-P n Low Input Current Noise: 1.1pA/√Hz 4.945V. With the addition of a negative supply, the LT6350 n 3mm × 3mm 8-Pin DFN and 8-Lead MSOP Packages can swing from 0V to 4.945V. Output common mode voltage is set by applying a voltage to the +IN2 pin.
applicaTions
The LT6350 draws 4.8mA from a 5V supply and consumes n 16-Bit and 18-Bit SAR ADC Drivers just 60µA in shutdown mode. n Single-Ended to Differential Conversion The LT6350 is available in a compact 3mm × 3mm, 8-pin n Differential Line Driver leadless DFN package and also in an 8-pin MSOP package L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. and operates over a –40°C to 125°C temperature range. Protected by U.S. Patents including 5610557, 6344773.
Typical applicaTion 20kHz Sine Wave, ADC Driver: Single-Ended Input to Differential Output –1dBFS 8192-Point FFT
0 5V –10 V+ = 5V, V– = –5V V 249Ω –20 OUTDIFF = 7.3VP-P 0.1µF V –30 +IN2 = 2.05V SNR = 94.9dB VIN –40 SINAD = 93.8dB + 5V 0V TO 4V – +IN1 SHDN V+ OUT2 –50 THD = –100.2dB –60 SFDR = 102.2dB + – –70 – AIN –80 LT6350 – 2200pF LTC2393-16 + MAGNITUDE (dB) –90 + AIN –100 –110 –IN1 +IN2 V– OUT1 –120 249Ω –130 –140 0 100 200 300 400 500 FREQUENCY (kHz) 499Ω 0.1µF 0.1µF 6350 TA01 6350 TA02 2V –5V 6350fc For more information www.linear.com/LT6350 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram DC Test Circuit Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts