LT6402-6 datasheet(14/16 Pages) LINER

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LT6402-6

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Large Output Voltage Swings

The LT6402-6 has been designed to provide the 3.2VP-P

output swing needed by the LTC1748 family of 14-bit

low-noise ADCs. This additional output swing improves

system SNR by up to 4dB.

Input Bias Voltage and Bias Current

The input pins of the LT6402-6 are internally biased to

the voltage applied to the VOCM pin. No external biasing

resistors are needed, even for AC-coupled operation. The

input bias current is determined by the voltage difference

between the input common mode voltage and the VOCM

pin (which sets the output common mode voltage). For

example, if the inputs are tied to 2.5V with the VOCM pin

at 2.2V, then a total input bias current of 1.5mA will ﬂow

into the LT6402-6’s +INA and +INB pins. Furthermore, an

additional input bias current totaling 1.5mA will ﬂow into

the –INA and –INB inputs.

Application (Demo) Boards

The DC954A Demo Board has been created for stand-alone

evaluation of the LT6402-6 with either single-ended or

differential input and output signals. As shown, it accepts

a single-ended input and produces a single-ended output

so that the LT6402-6 can be evaluated using standard

laboratory test equipment. For more information on this

Demo Board, please refer to the layout and schematic

diagrams found later in this data sheet.

There are also additional demo boards available that

combine the LT6402-6 with a variety of different Linear

Technology ADCs. Please contact the factory for more

information on these demo boards.

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APPLICATIONS INFORMATION

TYPICAL APPLICATION

LT6402-6 Datasheet(PDF) 14 Page - Linear Technology