ADL5330ACPZ-WP Analog Devices Inc, ADL5330ACPZ-WP Datasheet - Page 17

• Manufacturer Part Number: ADL5330ACPZ-WP
• Manufacturer: Analog Devices Inc

Specifications of ADL5330ACPZ-WP

• Number Of Channels: 1
• Supply Current: 215(Typ)@5VmA
• Frequency (max): 3GHz
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Power Dissipation: 1.1W
• Package Type: LFCSP EP
• Mounting: Surface Mount
• Pin Count: 24
• Noise Figure (typ): 14.7@2700MHzdB
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Compliant

Figure 40 shows the response of the AGC RF output to a pulse
on VSET. As VSET decreases to 1 V, the AGC loop responds
with an RF burst. Response time and the amount of signal
integration are controlled by the capacitance at the AD8318 C
pin—a function analogous to the feedback capacitor around an
integrating amplifier. An increase in the capacitance results in
slower response time.
More information on the use of AD8318 in an AGC application
can be found in the AD8318 data sheet.
INTERFACING TO AN IQ MODULATOR
The basic connections for interfacing the AD8349 with the
ADL5330 are shown in Figure 42. The AD8349 is an RF
quadrature modulator with an output frequency range of
700 MHz to 2.7 GHz. It offers excellent phase accuracy and
amplitude balance, enabling high performance direct RF
modulation for communication systems.
1
2
CH1 2.00V
AD8318 WITH PULSED V
ADL5330 OUTPUT
BASEBAND INPUTS
DIFFERENTIAL I/Q
Figure 40. Oscilloscope Screenshot Showing the
CH2
Response Time of the AGC Loop
50.0mVΩ
SET
DAC
DAC
LO
M10.0μs
ETC1-1-13
T
20.2000μs
T
100pF
100pF
T
IBBP
IBBN
QBBP
QBBN
Figure 42. AD8349 Quadrature Modulator and ADL5330 Interface
A CH1
VPOS
+5V
AD8349
IQ MOD
200Ω
200Ω
2.60V
COMM
V
OUT
Rev. A | Page 17 of 24
FLT
100pF
100pF
The output of the AD8349 is designed to drive 50 Ω loads and
easily interfaces with the ADL5330. The input to the ADL5330
can be driven single-ended, as shown in Figure 42. Similar con-
figurations are possible with the AD8345 (250 MHz to 1 GHz)
and AD8346 (800 MHz to 2.5 GHz) quadrature modulators.
Figure 41 shows how output power, EVM, ACPR, and noise
vary with the gain control voltage. V
1.4 V. Figure 41 shows that the modulation generated by the
AD8349 is a 1 GHz 64 QAM waveform with a 1 MHz symbol
rate. The ACPR values are measured in 1 MHz bandwidths at
1.1 MHz and 2.2 MHz carrier offsets. Noise floor is measured at
a 20 MHz carrier offset.
The output of the AD8349 driving the ADL5330 should be
limited to the range that provides the optimal EVM and ACPR
performance. The power range is found by sweeping the output
power of the AD8349 to find the best compromise between
EVM and ACPR of the system. In Figure 41, the AD8349 output
power is set to −15 dBm.
Figure 41. AD8349 and ADL5330 Output Power, ACPR, EVM, and Noise vs.
INHI
INLO
–100
–120
–140
–160
VPOS
GAIN CONTROL
+5V
–20
–40
–60
–80
V
ADL5330
20
RF VGA
GAIN
0
0
for a 1 GHz 64 QAM Waveform with 1 MHz Symbol Rate
NOISE FLOOR
COMM
0.2
OPLO
OPHI
120nH
0.4
OUTPUT POWER
+5V
0.6
100pF
100pF
120nH
V
GAIN
(V)
ACPR 1.1MHz OFFSET
ACPR 2.2MHz OFFSET
ETC1-1-13
0.8
GAIN
EVM
is varied from 0 V to
1.0
RF OUTPUT
1.2
ADL5330
1.4
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0