ADL5530-EVAL AD [Analog Devices], ADL5530-EVAL Datasheet - Page 10

• Manufacturer Part Number: ADL5530-EVAL
• Description: DC to 1000 MHz IF Gain Block
• Manufacturer: AD [Analog Devices]

ADL5530
THEORY OF OPERATION
The basic connections for operating the ADL5530 are shown in
Figure 21. Recommended components are listed in Table 5. The
inputs and outputs should be ac coupled with appropriately
sized capacitors (device characterization was performed with
10 nF capacitors). DC bias is provided to the amplifier via an
inductor connected to the RF output pin. The bias voltage
should be decoupled using a 10 nF capacitor.
A bias voltage of 5 V is recommended. However, the device is
specified to operate down to 3 V with a slightly reduced
compression point and a reduced noise figure.
For operation down to 10 MHz, a larger biasing choke is
recommended (see Table 5) along with larger ac-coupling
capacitors.
with the recommended components.
Table 5. Recommended Components for Basic Connections
Frequency
10 MHz to 50 MHz
50 MHz to 1000 MHz
RFIN
–10
–15
–20
20
15
10
–5
5
0
5
Figure 22 shows a plot of input return loss and gain
10nF
C1
10
Figure 22. Performance at 10 MHz
NC = NO CONNECT
15
Figure 21. Basic Connections
1
2
3
4
NC
IN1
NC
NC
ADL5530
C1
10 nF
0.1 μF
20
FREQUENCY (MHz)
OUT1
GND
NC
NC
S21 (3.3µH)
S21 (470nH)
25
S11 (470nH)
S11 (3.3µH)
8
7
6
5
C2
0.1 μF
10 nF
30
3V TO 5V
35
L1
470nH
L1
3.3 μH
470 nH
40
C5
10nF
10nF
C2
45
RF OUT
C5
0.1 μF
10 nF
5
0
Rev. 0 | Page 10 of 12
SOLDERING INFORMATION AND RECOMMENDED
PCB LAND PATTERN
Figure 23 shows the recommended land pattern for ADL5530.
To minimize thermal impedance, the exposed paddle on the
package underside should be soldered down to a ground plane
along with Pin 8. If multiple ground layers exist, they should be
stitched together using vias. Pin 1, Pin 3, Pin 4, Pin 5 and Pin 6
can be left unconnected, or can be connected to ground.
Connecting these pins to ground slightly enhances thermal
impedance.
0.33mm
0.33mm
0.33 mm
PIN 1
0.53mm
4
Figure 23. Recommended Land Pattern
0.46mm
2.13mm
8
5
0.5mm