AD8244

Data Sheet

LOW NOISE, JFET INPUT BUFFER

The voltage noise of the AD8244 can be reduced by placing

multiple buffers in parallel. For example, two buffers in parallel

reduce the voltage noise by √2, or all four buffers placed in

parallel act as a buffer with ½ the noise. The trade-offs to this

method are increased bias current, current noise, and input

capacitance. Place a small resistor, such as 50 Ω, between the

outputs to avoid extra current flow due to the slight differences

between each output. For less power sensitive applications, these

50 Ω resistors can be omitted to boost the available output current.

VOUT

VIN

RS

AD8244

RO

1/4

AD8244

RO

1/4

AD8244

RO

1/4

AD8244

RO

1/4

Figure 47. Reducing the Voltage Noise

Rev. A | Page 18 of 20