Analog Devices AD8333-EVALZ User manual

Evaluation Board for the
AD8333 I/Q Demodulator
AD8333-EVALZ
Rev. B
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2006–2007 Analog Devices, Inc. All rights reserved.
FEATURES
Factory tested and ready to use
SMA input and output connectors (7)
Configurable jumpers for user options
Phase select
Provision for external reset
Includes LNA input amplifier
Internal clock buffer
Summing amplifier to view sum of both channels or
single Channel I and Channel Q outputs
Compact surface-mount layout can be applied to
user application
APPLICATIONS
Hands-on testing of the AD8333
GENERAL DESCRIPTION
The AD8333-EVAL evaluation board enables the user to quickly
become familiar with the operating characteristics and features
of the AD8333 dual I/Q demodulator and phase shifter. Jumpers
provide a convenient means for exercising the user-selectable
features of the AD8333.
The board is tested prior to shipment and shipped with the
phase-encoding bits set to 0000 (no phase shift) for both
channels. The LNA is set up for a 50 Ω source, and the VGA
sections of the AD8332 are disabled. Test points are provided
along the signal path to facilitate signal tracing.
EVALUATION BOARD
05836-001
Figure 1. Evaluation Board—Actual Size

AD8333-EVALZ
Rev. B | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Evaluation Board .............................................................................. 1
Revision History ............................................................................... 2
Introduction ...................................................................................... 3
Features and Options................................................................... 3
Measurement Setup.......................................................................4
Evaluation Board Schematic and Artwork.....................................5
Board Layout..................................................................................7
Ordering Information.......................................................................9
Bill of Materials..............................................................................9
Ordering Guide .......................................................................... 10
ESD Caution................................................................................ 10
REVISION HISTORY
9/07—Rev. A to Rev. B
Changes to Features and Options Section..................................... 3
Changes to Figure 3.......................................................................... 5
Changes to Table 4............................................................................ 9
6/07—Rev. 0 to Rev. A
Changes to Figure 1.......................................................................... 1
Changes to Figure 2.......................................................................... 4
Changes to Figure 4.......................................................................... 6
Changes to Figure 6 and Figure 7................................................... 7
Changes to Table 4............................................................................ 9
Changes to Ordering Guide .......................................................... 10
1/06—Revision 0: Initial Version

AD8333-EVALZ
Rev. B | Page 3 of 12
INTRODUCTION
The AD8333-EVAL evaluation board provides a platform for
test and evaluation of the AD8333 I/Q demodulator and phase
shifter. The board is shipped fully assembled and tested, and the
user need only connect appropriate signals to the RF input and
f4LO SMA connectors. An AD8332 is included with the board
and acts as a buffer and bias supply for the AD8333, converting
single-ended signals to differential, centered at half the supply.
A photograph of the board is shown in Figure 1 and a schematic
diagram is shown in Figure 3. The board requires dual 5 V
supplies capable of supplying 300 mA or greater. Except for the
components shown in grayscale, the board is built and tested
using all the components illustrated in Figure 3.
FEATURES AND OPTIONS
The evaluation board has several features and options that are
configurable according to the specific needs of the user. Table 1
lists the jumpers and their functions.
Table 1. Jumper Functions
Jumper Function Position
ENBL Enable the AD8333 Bottom = disable; top = enable
PH10 Ch 1 Phase 0 bit Top = 0; bottom = 1
PH11 Ch 1 Phase 1 bit Top = 0; bottom = 1
PH12 Ch 1 Phase 2 bit Top = 0; bottom = 1
PH13 Ch 1 Phase 3 bit Top = 0; bottom = 1
PH20 Ch 2 Phase 0 bit Top = 1; bottom = 0
PH21 Ch 2 Phase 1 bit Top = 1; bottom = 0
PH22 Ch 2 Phase 2 bit Top = 1; bottom = 0
PH23 Ch 2 Phase 3 bit Top = 1; bottom = 0
RST Reset pin Left = reset; right = normal
The Phase Bits
The phase bits configure the channel for one of sixteen 22.5°
increments from 0° to 337.5°. The increments increase according
to a simple binary code from 0000 to 1111 embodied in the
phase bits from 0° (0x0) to 337.5° (0xF). Table 2 lists the phase
shift and corresponding code for each bit. The bits labeled 0 and
1 correspond to low and high, respectively, on the silkscreen.
Jumpers are provided to select the desired state.
Enable and Reset Jumpers
For normal operation, place a jumper in the upper position of
ENBL. To disable the AD8333, move the jumper to the lower
position. For normal operation, the jumper for RST is in its
right position. When the jumper is in the left position, the
device counter is held in reset and no mixing occurs.
Table 2. Phase Shift Select Codes
Ф Shift PHx3 PHx2 PHx1 PHx0
0° 0 0 0 0
22.5° 0 0 0 1
45° 0 0 1 0
67.5° 0 0 1 1
90° 0 1 0 0
112.5° 0 1 0 1
135° 0 1 1 0
157.5° 0 1 1 1
180° 1 0 0 0
202.5° 1 0 0 1
225° 1 0 1 0
247.5° 1 0 1 1
270° 1 1 0 0
292.5° 1 1 0 1
315° 1 1 1 0
337.5° 1 1 1 1
Fixed Options
Several options can be realized by adding or changing resistors.
LNA Input Impedance
The shipping configuration of the input impedance of the LNA
is 50 Ω to match the output impedance of most signal generators.
Input impedances of up to 14.7 kΩ are obtained by selection of
the values of R9 and R10. Details concerning this circuit feature
are found in the AD8332 data sheet. For reference, Table 3 lists
common values of input impedance and corresponding
feedback resistor values.
Table 3. LNA External Component Values for Common
Source Impedances
RIN (Ω) RFB, Nearest STD 1% Value (Ω) CSH (pF)
50 280 22
75 412 12
100 562 8
200 1.13 k 1.2
500 3.01 k None
6 k ∞ None

AD8333-EVALZ
Rev. B | Page 4 of 12
Current Summing
The output transimpedance amplifiers, A1 through A4, are
configured as I-to-V converters to convert the output current of
the AD8333 to a voltage. The low-pass filters formed by the
feedback components are designed for single-channel operation
with ±5 V supplies.
Optional R4 and R5 resistors are provided to sum the two
channels. When R4 and R5 are installed, R2 and R3 are
removed and the sum of the outputs is seen at the I1 and Q1
output SMA connectors. If large signal levels are expected, the
feedback resistor and capacitor values, 787  and 2.2 nF, can be
halved and doubled, respectively, to optimize the output swing.
The filter capacitor values can be changed if other frequencies
are desired.
Reset Input
For normal operation, the reset input is high (no reset). To drive
the reset with a dynamic signal, provision is made to connect a
signal generator at the RST input. A 49.9 Ω, 0603 surface-
mount resistor can be installed at R15 to terminate the reset
input for pulsed experiments. In this configuration, the jumper
at RST is not used and must be removed to avoid loading the
power supply.
MEASUREMENT SETUP
Figure 2 displays the connector and user-selectable jumper
locations. A typical board and test equipment setup is shown in
Figure 4. Two signal generators, a power splitter, and a ±5 V,
300 mA (minimum) power supply are required. Synchronize
the signal generators for optimum results. Remember that the
f4LO signal generator frequency is four times that of the nominal
frequency of the RF source. For example, to detect signals with
a nominal center frequency of 5 MHz, an f4LO frequency of 20 MHz
is applied to the oscillator input. For an applied RF signal of
5.01 MHz, the mix frequencies are 10 kHz and 10.01 MHz.
Because of the low-pass active filter of the transconductance
amplifiers (A1 through A4), 10 kHz is observed at the output.
Take care to avoid over driving the LNA input of the AD8332.
The LNA gain is 19 dB (9.5×) and the maximum output swing
must not be exceeded; −10 dBm suffices for many experiments.
The f4LO input is ac-coupled to a 5 V LVDS buffer to provide an
ideal interface to the AD8333.
The f4LO level is frequency dependent; consult the AD8333 data
sheet for minimum signal levels, then adjust the signal generator
output level accordingly.
05836-002
f
4LO
INPUT
CHANNEL 1
PHASE BITS
ENABLE
RESET
CHANNEL 2
PHASE BITS
CH 2 RF INPUT
CH 1 RF INPUT
CH 1 I OUTPUT
CH 1 Q OUTPU
T
CH 2 I OUTPUT
CH 2 Q OUTPU
T
+5V, GND, –5V
Figure 2. Evaluation Board Layout

AD8333-EVALZ
Rev. B | Page 5 of 12
EVALUATION BOARD SCHEMATIC AND ARTWORK
05836-003
COMM
Q2NO Q1PO Q1NO Q2PO
PH12 4LOP PH13
VNEG
I1PO
91011 131415 16
8 7 6 5 1 4 3
2
19 17 18
24 20 23 22 21
26 25
2730 29 28
PH22 LODC PH23 4LON COM M
PH21 I2NO
I2PO
31
PH11 I1N0
32
12
DUT
AD8333
C17
0. 1µ F
C41
0.1µF
C4 8 0.1µF
C36
0. 1µF
C2 4 0.1µF
VPOS
RS T
R1
10 0Ω
+5 V
R13 49.9Ω
PH11
PH13
PH10
PH21 PH22 PH23
H
+5V
RS T
C51
0. 1µF
Q2
R42
78 7Ω
+5VS
I2
C5 2 0.1µF
C3 3 5pF
C32
2.2nF
R38
0Ω
27 1 8 34
5
6
A4
AD8021
R41
78 7Ω
C5 0 0.1µF
C3 0
5pF
C31
2.2nF
R35
0Ω
27 1 8 34
5
6
C4 9 0.1µF
A3
AD 8021
+5 VS
I1
R39
78 7Ω
C45 0.1µF
C27 5pF
C26
2.2nF
R32
0Ω
L7
120nH FB
27 1 8 34
5
6
C44
0. 1µF
L6
120nH FB
A1
AD 802 1
+5V
L4
120nH FB
Q1
R40
78 7Ω
C4 7 0.1µF
C28
5pF
C29
2.2 n F
R33
0Ω
27 1 8 34
5
6
C46
0. 1µ F
A2
AD8021
+5 VS
R22 20Ω
R23 20Ω
VPO S
ENBL
L3 12 0nH FB
LOP
+
+
+
+
+5VS
Z1
AD8332
C11
0.1µF
C4
0.1µF
C42
0.1µF
VPS
IN2
C43 1nF
C1 3 0.1µF
C3
22pF
R10
274Ω
R9
274Ω
C6
0.1µF
29303132 28 252627
LOP1 ENBV
LMD2 LON2 VPS2 INH2 LMD1 LON1 VPS 1 INH1
8 7 6 5 1 4 3 2
COMM
VOL2
VOH2 VOH1
VOL1
NC
VPSV
COMM
20 17 18 19 21 22 23 24
14139121110 15 16
LOP2 RCLMP
C1
0.1µF
C5
0.1µ F
IN1
C2
22 pF VPS
VPS
C14
0.1µ F
+5VS
+5VS
+5VS
+5 V
TP2
TP1
TP4
TP3
Z3
DS 90 C4 01
TP8 TP7 TP6 TP5
PH12
4
32
5
17
6
8
+5V
R1 5 OPT
R4
OPT
R5 OPT
R2 0Ω
R3 0Ω
C7 10µF 10 V
+5 V
+
C8 10µF 10 V
+
–5V
GND1 GND4GND3GND2
R25 20Ω R26 20Ω
R7 1. 5kΩ
C12
0.1µF
R6
3.4 8k Ω
C9
0. 1µF
Z3SPARE
VPS
L PH20
LH
H
L
H
–5VS
–5VS
–5V
–5VS
–5VS
–5V
–5V
COM1
COM2
VIP2
VIN2
VCM2
MODE
GAIN
VIP1
VIN1
VCM1
HILO
ENBL
PH20 PH10
VPOS VPOS
RF2P RFIP
RF2N
VPOS VPOS
RFIN
ENBL
RSET
–
–
–
–
L5 120nH FB
C39
0.018µF
L1
120nH
FB
L2
120nH
FB
C40
0.018µF
Figure 3. Evaluation Board Schematic

AD8333-EVALZ
Rev. B | Page 6 of 12
05836-004
POWER
SUPPLY
BOTTOM:
GENERATOR FOR RF INPUT
TYPICAL SETTING: 5.01MHz
T
OP:
SIGNAL GENERATOR FOR
f
4LO
INPUT TYPICAL SETTING: 20MHz
SIGNAL 1V p-p
SYNCHRONIZE
GENERATORS
POWER
SPLITTER
SIGNAL
INPUT(S)
+5V –5V
Figure 4. Typical Board Test Connections (One Channel Shown)

AD8333-EVALZ
Rev. B | Page 7 of 12
BOARD LAYOUT
The AD8333 evaluation board has four layers. The interconnecting circuitry is located on the outer layers with the inner layers dedicated
as power and ground planes. Figure 5 through Figure 9 illustrate the copper patterns.
05836-005
Figure 5. Component Side Copper
05836-006
Figure 6. Wiring Side Copper
05836-007
Figure 7. Component Side Silkscreen
05836-008
Figure 8. Ground Plane

AD8333-EVALZ
Rev. B | Page 8 of 12
05836-009
Figure 9. Power Plane

AD8333-EVALZ
Rev. B | Page 9 of 12
ORDERING INFORMATION
BILL OF MATERIALS
Table 4.
Qty Name Description Reference Designator Mfg. Part Number Manufacturer
4 IC AD8021ARZ A1 to A4 AD8021ARZ Analog Devices, Inc.
23 Capacitor 0.1 μF, 16 V, 0603, X7R C1, C4, C5, C6, C9, C11, C12, C13,
C14, C17, C24, C36, C41, C42,
C44, C45, C46, C47, C48, C49,
C50, C51, C52
C0603C104K4RACTU KEMET Corporation
2 Capacitor 22 pF, 50 V, 5%, 0603 C2, C3 ECJ-1VC1H220J Panasonic
2 Capacitor 10 μF, 10 V, A size tantalum C7, C8 T491A106M010AS KEMET Corporation
4 Capacitor 2.2 nF, 50 V, X7R, 10%, 0603 C26, C29, C31, C32 ECJ-1VB1H222K Panasonic
4 Capacitor 5 pF, 50 V, 0603 C27, C28, C30, C33 ECJ-1VC1H050C Panasonic
2 Capacitor 0.018 μF, 10%, 50 V, X7R, 0603 C39, C40 06035C183KAT2A AVX Corp.
1 Capacitor 1 nF, 100 V, 10%, 0603, X7R C43 ECJ-1VB2A102K Panasonic
1 IC AD8333 I/Q demodulator DUT AD8333ACPZ-WP Analog Devices, Inc.
7 Connector SMA female PC mount, RA I1, I2, IN1, IN2, LOP, Q1, Q2 901-143-6RFX Amphenol
7 Ferrite Bead 120 nH, 0603 L1, L2, L3, L4, L5, L6, L7 BLM18BA750SN1D Murata Manufacturing Co.
1 Resistor 100 Ω, 1%, 1/16 W, 0603 R1 ERJ-3EKF1000V Panasonic
6 Resistor 0 Ω, 5%, 1/10 W, 0603 R2, R3, R32, R33, R35, R38 ERJ-2GE0R00X Panasonic
1 Resistor 3.48 kΩ, 1%, 1/10 W, 0603 R6 ERJ-3EKF3.48KV Panasonic
1 Resistor 1.5 kΩ, 1%, 1/10 W, 0603 R7 ERJ3EKF1501V Panasonic
2 Resistor 274 Ω, 1/16 W, 1%, 0603 R9, R10 ERJ-3EKF2740V Panasonic
1 Resistor 49.9 Ω, 1%, 1/16 W, 0603 R13 ERJ-3EKF49R9V Panasonic
4 Resistor 20 Ω, 1%, 1/10 W, 0603 R22, R23, R25, R26 ERJ3EKF20R0V Panasonic
4 Resistor 787 Ω, 1/16 W, 1%, 0603 R39 to R42 ERJ-3EKF7870V Panasonic
10 Header 3-pin 0.025" sq., 0.1" spacing ENBL, PH10, PH11, PH12, PH13,
PH20, PH21, PH22, PH23, RST
22-11-2032 Molex, Inc.
1 Test Loop 0.125” diameter, red +5 V TP-104-01-02 Components Corp.
4 Test Loop 0.125” diameter, black GND1 to GND4 TP-104-01-00 Components Corp.
1 Test Loop 0.125” diameter, blue −5 V TP-104-01-06P Components Corp.
5 Test Loop 0.125” diameter, purple TP5 to TP8, RST TP-104-01-07 Components Corp.
1 IC VGA AD8332 Z1 AD8332ACPZ Analog Devices, Inc.
1 IC DRV LVDS dual differential
signal 8-lead SOIC
Z3 DS90C401M National Semiconductor
1 PC Board 09-A00941C
4 Bumper Mount to wiring side of board SJ-67A11 (black) 3M
10 Jumper Install at ENBL: top, PH10: top,
PH11: top, PH12: top, PH13: top,
PH20: bottom, PH21: bottom,
PH22: bottom, PH23: bottom,
RST: right; orient when board is in
normal viewing position with IN1
and IN2 SMA connectors at left
65474-001 FCI

AD8333-EVALZ
Rev. B | Page 10 of 12
ORDERING GUIDE
Model Description
AD8333-EVALZ1Evaluation Board
1Z = RoHS Compliant Part.
ESD CAUTION