HMC610LP4 Datasheet, PDF (9/12 Pages) Hittite Microwave Corporation – 70 dB RMS POWER DETECTOR, DC - 3.9 GHz

v02.0607
Pin Descriptions (Continued)
Pin Number
Function
Description
HMC610LP4 / 610LP4E
70 dB RMS POWER
DETECTOR, DC - 3.9 GHz
Interface Schematic
8
9, 10
COFS
Input high pass filter capacitor. Connect to common
via a capacitor to determine 3 dB point of input
signal high-pass filter.
VSET input. Short this pin to RMSOUT for normal
14
VSET
operation. Use a resistor between RMSOUT and
VSET to increase the logarithmic slope.
Logarithmic output that converts the input power
15
RMSOUT
to a DC level. Short this pin to VSET for normal
operation.
16
IPWR
Ground for proper operation
17
CINT
Connection for ground referenced loop filter
integration capacitor.
This voltage input changes the logarithmic intercept
19
VTGT
point. Use of lower target voltage reduces error for
complex signals with large crest factors. Normally
connected to VREF.
20
VREF
Reference voltage output.
8 - 40
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