AD637-EVALZ Analog Devices Inc, AD637-EVALZ Datasheet - Page 16

• Manufacturer Part Number: AD637-EVALZ
• Description: BOARD EVALUATION FOR AD637
• Manufacturer: Analog Devices Inc

Specifications of AD637-EVALZ

• Main Purpose: Interface, RMS to DC Converters
• Utilized Ic / Part: AD637
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

EVALUATION BOARD
Figure 23 shows a digital image of the AD637-EVALZ, an
evaluation board specially designed for the AD637. It is
available at
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 (V
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
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and is fully tested and ready for
IN
of SOIC package) of
Figure 23. AD637-EVALZ
Rev. K | Page 16 of 20
amp, and is configured on the AD637-EVALZ as a low-pass
Sallen-Key filter whose f
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.
C
< 0.5 Hz. Users can connect to the