5962-8963701CA(2015) View Datasheet(PDF) - Analog Devices
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Description
Manufacturer
5962-8963701CA Datasheet PDF : 25 Pages
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Data Sheet
EVALUATION BOARD
Figure 23 shows a digital image of the AD637-EVALZ, an
evaluation board specially designed for the AD637. It is
available at www.analog.com and is fully tested and ready
for bench testing after connecting power and signal I/O. The
circuit is configured for dual power supplies, and standard
BNC connectors serve as the signal input and output ports.
Referring to the schematic in Figure 30, the input connector
RMS_IN is capacitively coupled to Pin 15 (VIN of SOIC package)
of the AD637. The DC_OUT connector is connected to Pin 11,
RMS OUT, with provisions for connections to the output buffer
between Pin 1 and Pin 16. The buffer is an uncommitted op
AD637
amp, and is configured on the AD637-EVALZ as a low-pass
Sallen-Key filter whose fC < 0.5 Hz. Users can connect to
the buffer by moving the FILTER switch to the on position.
DC_OUT is still the output of the AD637, and the test loop,
BUF_OUT, is the output of the buffer. The R2 trimmer adjusts
the output offset voltage.
The LPF frequency is changed by changing the component
values of CF1, CF2, R4, and R5. See Figure 24 and Figure 30
to locate these components. Note that a wide range of capacitor
and resistor values can be used with the AD637 buffer amplifier.
Figure 23. AD637-EVALZ
Rev. L | Page 21 of 25
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