ADL5902-EVALZ AD [Analog Devices], ADL5902-EVALZ Datasheet - Page 8

• Manufacturer Part Number: ADL5902-EVALZ
• Description: 50 MHz to 9 GHz 65 dB TruPwr Detector
• Manufacturer: AD [Analog Devices]

ADL5902
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
1
2
3, 10
4, 9, EPAD
5
6
7
8
11
12
13
14
15
16
Mnemonic
TADJ/PWDN
NC
VPOS
COMM
CLPF
VOUT
VSET
TEMP
VREF
VTGT
NC
INHI
INLO
NC
Description
This is a dual function pin used for controlling the amount of nonlinear intercept temperature compensation at
voltages <2.5 V and/or for shutting down the device at voltages >4 V. If the shutdown function is not used, this pin
can be connected to the VREF pin through a voltage divider. See Figure 41 for an equivalent circuit.
No Connect.
Supply for the Device. Connect this pin to a 5 V power supply. Pin 3 and Pin 10 are not internally connected;
therefore, both must connect to the source.
System Common Connection. Connect these pins via low impedance to system common. The exposed paddle
is also COMM and should have both a good thermal and good electrical connection to ground.
Connection for RMS Averaging Capacitor. Connect a ground-referenced capacitor to this pin. A resistor can be
connected in series with this capacitor to modify loop stability and response time. See Figure 43 for an
equivalent circuit.
Output. In measurement mode, this pin is connected to VSET. In controller mode, this pin can be used to drive
a gain control element. See Figure 43 for an equivalent circuit.
The voltage applied to this pin sets the decibel value of the required RF input voltage that results in zero
current flow in the loop integrating capacitor pin, CLPF. This pin controls the variable gain amplifier (VGA) gain
such that a 50 mV change in V
circuit.
Temperature Sensor Output of 1.4 V at 25°C with a Coefficient of 5 mV/°C. See Figure 38 for an equivalent circuit.
General-Purpose Reference Voltage Output of 2.3 V at 25°C. See Figure 39 for an equivalent circuit.
The voltage applied to this pin determines the target power at the input of the RF squaring circuit. The intercept
voltage is proportional to the voltage applied to this pin. The use of a lower target voltage increases the crest
factor capacity; however, this may affect the system loop response. See Figure 44 for an equivalent circuit.
No Connect.
RF Input. The RF input signal is normally ac-coupled to this pin through a coupling capacitor. See Figure 37 for
an equivalent circuit.
RF Input Common. This pin is normally ac-coupled to ground through a coupling capacitor. See Figure 37 for
an equivalent circuit.
No Connect.
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PADDLE IS COMM AND SHOULD
TADJ/PWDN
HAVE BOTH A GOOD THERMAL AND GOOD
ELECTRICAL CONNECTION TO GROUND.
COMM
VPOS
NC
Figure 2. Pin Configuration
SET
1
2
3
4
Rev. 0 | Page 8 of 28
changes the gain by approximately 1 dB. See Figure 42 for an equivalent
(Not to Scale)
ADL5902
TOP VIEW
PIN 1
INDICATOR
12 VTGT
11 VREF
10 VPOS
9 COMM