HMC7229CHIPS Datasheet, PDF (14/16 Pages) Analog Devices – Point to point radios

HMC7229CHIPS
Data Sheet
The bias conditions listed at VDD = 6 V, IDQ = 1200 is a
recommended operating point to receive optimum performance
from the HMC7229CHIPS. The data used in this data sheet is
taken with the recommended bias conditions (see the
Specifications section).
Using the HMC7229CHIPS in a different bias condition may
provide different performance than the performance shown in
the Typical Performance Characteristics section.
The VDET and VREF pins are the output pins for the internal
power detector. The VDET pin is the dc voltage output pin
representing the RF output power rectified by the internal
diode, biased through an external resistor.
The VREF pin is the dc voltage output pin representing the
reference diode voltage, which is biased through an external
resistor. The reference diode voltage compensates the temperature
variation effects on both the VREF and VDET diodes. Figure 36
shows a suggested circuit to read out the output voltage in
correlation with the RF output power.
TYPICAL APPLICATION CIRCUIT
V_DD1, V_DD2
V_DD3, V_DD4
OPTION 1
V_GG1
4.7µF ⁺ 0.1µF
100pF
100pF
100pF
0.1µF ⁺ 4.7µF
4.7µF
OPTION 2
V_GG2
+ ^0.1µF
100pF
2
3
HMC7229CHIPS
RFIN
1
13
14
4
5
11
12
100pF
6
78
10 ⁹
RFOUT
V_REF
V_DET
SUGGESTED CIRCUIT
10kΩ
–5V
10kΩ
V_OUT = V_REF – V_DET
10kΩ 10kΩ
100kΩ 100kΩ
+5V
+5V
4.7µF
+
0.1µF
100pF
V_DD5, V_DD6
4.7µF
+
0.1µF
100pF
100pF
100pF
100pF _0.1µF
V_DD7, V_DD8
+ _4.7µF
Figure 36. Typical Application Circuit
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