Rail to rail input and output low noise single ended differential converter /ADC driver | Heisener Electronics
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Rail to rail input and output low noise single ended differential converter /ADC driver

Technology Cover
Post-datum: 2023-04-10, Linear Technology

The LT6350 is a rail to rail input and output low noise single-ended differential converter/ADC driver with fast stability time. In a compact 3mm x 3mm 8-pin DFN package and 8-pin MSOP package, it operates in a temperature range of -40°C to 125°C.


Pin arrangement

            


It converts a high-impedance or low-impedance, single-ended input signal into a low-impedance, balanced, differential output and is suitable for driving a high-performance differential successive approximation register (SAR) ADC. The dual op-amp topology has a very low noise OP-amp that can support a signal-to-noise ratio of 110dB within 1MHz bandwidth. The input is trimmed to a constant low input reference voltage offset in the input range to prevent the vos step from reducing distortion.


Block diagram

                                

On a single 5V power supply, the output can swing from 55mV to 4.945V. By adding a negative power supply, the LT6350 can swing from 0v to 4.945v. The output common-mode voltage is set by applying a voltage to the + in2 pin. The LT6350 draws 4.8mA from a 5V power supply and consumes only 60µa in off mode.


Dc test circuit

                              


Applications

● 16 - and 18-bit SAR ADC drivers

● One end to difference

● Differential line driver


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