adl5336 Analog Devices, Inc., adl5336 Datasheet - Page 20
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adl5336
Manufacturer Part Number
adl5336
Description
Cascadable If Vgas With Programmable Rms Detectors
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADL5336.pdf
(32 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
adl5336ACPZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
ADL5336
APPLICATIONS INFORMATION
BASIC CONNECTIONS
The basic connections for a typical
shown in Figure 63.
SUPPLY DECOUPLING
A nominal supply voltage of 5.0 V should be applied to the supply
pins. The supply voltage should be between the limits of 4.5 V
and 5.5 V. All of the supply pins must be decoupled to ground
with at least one low inductance, surface-mount ceramic capacitor
of 0.1 μF. Place these decoupling capacitors as close as possible
to the
a digital supply. Take care to separate the two supplies with a
large surface-mount inductor of 33 μH, and each supply must
then be decoupled separately to their respective grounds through a
10 μF capacitor. The
analog ground and a digital ground. Again, a large surface-mount
inductor of 33 μH should be used to separate the grounds.
ADL5336
device. The
VPOS
INPUT 1
VPOS
ADL5336
ADL5336
OUTPUT 1
INPUT 1
BALUN
also has two separate grounds: an
+5V
+5V
ADL5336
has an analog supply and
OUTPUT 1
BALUN
application are
VCM1
INP1
COM
ENBL
VPOS
INM1
VPOS
MODE
Figure 63. Basic Connections Schematic
INPUT 2
Rev. A | Page 20 of 32
ADL5336
INPUT 2
BALUN
INPUT SIGNAL PATH
The
go to VGA2 via an internal switch, and the other input goes to
VGA1. Each of the three pairs of input pins (INP1/INM1,
IP2A/IM2A, and IP2B/IM2B) has a differential input impedance of
200 Ω. To obtain maximum power transfer, the driving source
impedance also needs to be 200 Ω. On the evaluation board,
this is achieved via a 4:1 impedance ratio balun. The evaluation
board schematic is shown in Figure 70. For more information
on the input signal paths, refer to the Input Signal Path section.
The input common-mode voltage sits at roughly VPOS/2 for
both VGAs, except on VGA2; the nonselected input of VGA2
has an input common-mode voltage that sits at roughly ground.
OUTPUT SIGNAL PATH
There are two output signal paths on the ADL5336; one signal
path per VGA. The output of VGA1 can be ac-coupled into either
of the inputs of VGA2, which cascades the two VGAs, or ac-coupled
into a 200 Ω termination impedance. VGA1 is designed to drive a
200 Ω differential load, whereas VGA2 is designed to drive a 100 Ω
differential load. On the evaluation board, a 100 Ω differential
impedance is presented to the output of VGA2. This is achieve
via a 1:1 balun and a resistive matching network. For more
information on the evaluation board, see the evaluation board
schematic in Figure 70. The output common-mode voltage on
both VGAs sits at roughly VPOS/2.
ADL5336
VCM2
VPOS
OPM2
VPOS
DATA
OPP2
COM
SDO
has three input signal paths, two of which inputs
INPUT 3
BALUN
OUTPUT 2
BALUN
SPI CONTROL
+5V
+5V
INPUT 3
OUTPUT 2