AD8332-EVALZ: Dual VGA, Ultralow Noise Preamplifier, and Programmable RIN Evaluation Board Data Sheet PDF

Dual VGA, Ultralow Noise Preamplifier, and
Programmable RIN Evaluation Board
AD8332-EVALZ
GENERAL DESCRIPTION
The AD8332-EVALZ is a platform for the test and evaluation of
the AD8332 variable gain amplifier (VGA). The board is shipped
assembled and tested, and users only need to connect the signal
and VGAIN sources to a single 5 V power supply. Figure 1 is a
photograph of the component side of the board, and Figure 2 is
the schematic.
For reference, Table 1 lists the common input impedance values
and corresponding adjustments. The board is designed for
0603-size, surface-mount components.
Table 1. LNA External Component Values for Common
Source Impedances
RIN (Ω)
50
75
100
200
500
6k
RFBx (Ω, Std 1% Value)
274
412
562
1.13 k
3.01 k
∞
CSHx (pF)
22
12
8
1.2
None
None
SMA connectors, S2, S3, S6, and S7, are provided for access to
the LNA outputs or the VGA inputs. If the LNA is used alone,
0.1 μF coupling capacitors can be installed at locations C5, C9,
C23, and C24. Resistors of 68 Ω to 100 Ω can be required if the
load capacitances, as seen by the LNA outputs, are larger than
approximately 10 pF.
03635-001
A resistor can be inserted at RCLMP if output clamping
is desired. The peak-to-peak clamping level is adjusted by
installing one of the standard 1% resistor values listed in the
AD8332 data sheet.
Figure 1. AD8332-EVALZ Photo of Component Side
USER-SUPPLIED OPTIONAL COMPONENTS
The board is built and tested using the components shown in
black in Figure 2. Provisions are made for optional components
(shown in gray) that can be installed for testing at the user’s
discretion. The default LNA input impedance is 50 Ω to match
various signal generators and network analyzers. Input impedances
up to 6 kΩ are realized by changing values of RFBx and CSHx.
Consult the AD8332 data sheet for more details on this circuit
feature.
A high frequency differential probe connected to the 2-pin
headers VOx is the preferred method to observe a waveform
at the VGA output. A typical setup is shown in Figure 3. Singleended loads can be connected directly via the board edge SMA
connectors. Note that the AD8332 output amplifier is buffered with
237 Ω resistors; therefore, be sure to compensate for attenuation if
low impedances are connected to the output SMAs.
MEASUREMENT SETUP
The basic board connections for measuring bandwidth are
shown in Figure 3. A 5 V, 100 mA (minimum) power supply is
required, and a low noise voltage reference supply is required
for VGAIN.
Rev. D
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: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2003–2007 Analog Devices, Inc. All rights reserved.
AD8332-EVALZ
TABLE OF CONTENTS
General Description ......................................................................... 1
Evaluation Board PCB Layers......................................................5
User-Supplied Optional Components ........................................... 1
Ordering Information.......................................................................6
Measurement Setup.......................................................................... 1
Parts List .........................................................................................6
Revision History ............................................................................... 2
Ordering Guide .............................................................................6
Evaluation Board Schematic ........................................................... 3
ESD Caution...................................................................................6
Board Layout and Parts List........................................................ 4
REVISION HISTORY
11/07—Rev. C to Rev. D
Changes to Figure 1.......................................................................... 1
Changes to Figure 2.......................................................................... 3
Changes to Figure 3.......................................................................... 4
Changes to Figure 4 and Figure 9................................................... 5
Changes to Table 2 and Ordering Guide ....................................... 6
7/03—Rev. 0 to Rev. A
Changes to Figure 1...........................................................................1
Changes to Figure 2...........................................................................3
Changes to Figure 3...........................................................................4
Changes to Table 2.............................................................................6
3/03—Revision 0: Initial Version
5/06—Rev. B to Rev. C
Updated Format..................................................................Universal
Changes to General Description and User-Supplied Optional
Components Section ........................................................................ 1
Inserted Figure 1 ............................................................................... 1
Changes to Figure 2.......................................................................... 3
Changes to Figure 3.......................................................................... 4
Changes to Figure 4 through Figure 9 ........................................... 5
Changes to Table 2............................................................................ 6
11/04—Rev. A to Rev. B
Changes to User Supplied Optional Components Section ......... 1
Changes to Measurement Setup Section ....................................... 1
Changes to Figure 1.......................................................................... 1
Changes to Figure 2 to Figure 5 ...................................................... 3
Changes to Figure 6 and Figure 7................................................... 4
Changes to Figure 8.......................................................................... 5
Changes to Table 2............................................................................ 6
Rev. D | Page 2 of 8
AD8332-EVALZ
EVALUATION BOARD SCHEMATIC
+5V
C25
10µF
GND GND1 GND2 GND3 GND4
+
C2
0.1µF
C4
0.1µF
L1
120nH FB
LNA2
1 LMD2
C1
0.1µF
+5V
+5VLNA
CFB1
18nF
3 VPS2
C6
0.1µF
RFB2
274Ω
C9
VPS1 26
AD8332ARUZ
+5VLNA
C7
0.1µF
RFB1
274Ω
C23
4 LON2
LNA1
CAL1
S2
LON1
LON1 25
R9
R10
W9
W8
5 LOP2
LOP1 24
C5
S7
LOP2
L2
120nH FB
INH1 27
CFB2
18nF
CAL2
L8
120nH FB
C3
0.1µF
CSH1
22pF
CSH2
22pF
2 INH2
S6
LON2
LMD1 28
C24
R12
S3
LOP1
R11
6 COM2
C16
0.1µF
COM1 23
C14
0.1µF
C13
0.1µF
7 VIP2
VIP1 22
8 VIN2
VIN1 21
C15
0.1µF
C10
0.1µF
9 VCM2
VCM1
VCM1 20
C17
0.1µF
10 GAIN
GAIN
HILO 19
C8
1nF
HI
W5
TP3
CLAMP
RCLMP
C20
0.1µF
11 RCLMP
VOH2
T2
1:1
R13
237Ω
C11
0.1µF W12
R14
237Ω
W13
VO2
C12
0.1µF
ENABLE
DISABLE
VOH1 17
R7
100Ω
L4
120nH FB
+5V
L6
120nH FB
12 VOH2
R8
100Ω
LO
W4
ENB 18
L3
120nH FB
+5V
R5
100Ω
13 VOL2
14 COMM
VOL1 16
VPSV 15
R6
100Ω
W10
C19
0.1µF
W11
C18
0.1µF
VO1
R15
237Ω
T1
1:1 VOH1
R16
237Ω
L5
120nH FB
L7
120nH FB
COMPONENTS IN GRAY ARE
OPTIONAL AND USER SUPPLIED.
+5V
C22
0.1µF
Figure 2. AD8332-EVALZ Schematic
Rev. D | Page 3 of 8
03635-002
VCM2
AD8332-EVALZ
NETWORK
ANALYZER
1103 TEKPROBE
POWER SUPPLY
SUPPLY FOR
VGAIN
03635-003
DIFFERENTIAL
PROBE
Figure 3. Typical Board Test Connections
BOARD LAYOUT AND PARTS LIST
The evaluation board circuitry uses four conductor layers.
The two inner layers are power and ground planes, and all
interconnecting circuitry is located on the outer layers. Figure 5,
Figure 6, Figure 7, and Figure 8 illustrate the copper patterns.
Rev. D | Page 4 of 8
AD8332-EVALZ
03635-004
03635-007
EVALUATION BOARD PCB LAYERS
Figure 7. Ground Plane
03635-005
03635-008
Figure 4. AD8332-EVALZ Assembly
Figure 8. Power Plane
03635-009
03635-006
Figure 5. Primary Side Copper
Figure 9. Component Side Silkscreen
Figure 6. Secondary Side Copper
Rev. D | Page 5 of 8
AD8332-EVALZ
ORDERING INFORMATION
PARTS LIST
Table 2.
Qty.
8
2
4
4
2
18
Name
Inductor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Description
Ferrite Bead, 120 nH, 0603
SM, 274 Ω, 1%, 1/10 W, 0603
SM, 237 Ω, 1%, 1/10 W, 0603
SM, 100 Ω, 1%, 1/16 W, 0603
SM, 18 nF, 10%, 50 V, 0603
SM, 0.1 μF, 10%, 0603
1
2
1
2
6
2
4
4
1
5
Capacitor
Capacitor
Capacitor
Transformer
Header
Header
Connector
Test Point
Test Point
Test Point
SM, 1 nF, 50 V, 0603
SM, 22 pF, 50 V, 0603
SM, 10 μF
RF
2-Pin
3-Pin
SMA, PC Mount, Right Angle
Violet
Red
Black
ESD CAUTION
ORDERING GUIDE
Model
AD8332–EVALZ 1
1
Reference Designation
L1, L2, L3, L4, L5, L6, L7, L8
RFB1, RFB2
R13, R14, R15, R16
R5, R6, R7, R8
CFB1, CFB2
C1, C2, C3, C4, C6, C7, C10, C11, C12, C13,
C14, C15, C16, C17, C18, C19, C20, C22
C8
CSH1, CSH2
C25
T1, T2
VO1, VO2, W10, W11, W12, W13
W4, W5
LNA1, LNA2, VOH1, VOH2
VCM1, VCM2, GAIN, CLAMP
+5V
GND, GND1, GND2, GND3, GND4
Description
Evaluation Board
Z = RoHS Compliant Part.
Rev. D | Page 6 of 8
Mfg.
Murata
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Mfg. Part Number
BLM18BA750SN1D
ERJ-3EKF2740V
ERJ-3EKF2370V
ERJ-3EKF1
ECJ-1VB1E183K
C0603C104K4RAC
Panasonic
Panasonic
Nichicon
Mini-Circuits
Molex
Molex
Amphenol
Components Corp
Components Corp
Components Corp
ECJ-1VB2A102K
ECJ-1VC1H220J
F931A106MAA
T1-6T
22-10-2021
22-10-2031
901-143-6RFX
TP104-01-07
TP104-01-02
TP104-01-00
AD8332-EVALZ
NOTES
Rev. D | Page 7 of 8
AD8332-EVALZ
NOTES
©2003–2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
EB03635-0-11/07(D)
Rev. D | Page 8 of 8
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