AD8330 Evaluation Tools (EVAL-AD8330EB) PDF

AD8330 Evaluation Board
EVAL-AD8330EB
GENERAL DESCRIPTION
BASIC OPERATION
The EVAL-AD8330EB is an easy-to-use accessory that enables a
hands-on evaluation of the AD8330 variable gain amplifier
(VGA). It includes test pins for connections to all of the functional
device inputs. Figure 1 is a full size photograph of the board.
The input SMA connector IN is terminated with a 49.9 Ω
resistor (see Figure 2). For convenience, the board includes an
AD8131 high speed differential amplifier to convert a singleended signal source to the differential input of the AD8330. If
desired, the AD8131 can be removed and the AD8330 can be
driven at one of its inputs from a single-ended source.
The AD8330 output is observed at the SMA connectors OUT_HI
and OUT_LO or by using the 2-pin header OUT_HI/ OUT_LO
adjacent to the device.
03721-009
The AD8330 requires only a +5 V power supply; however, because
of the AD8131 buffer bipolar power supply requirements, ±5 V
supplies are required to power the board. The current required
for the board is approximately 40 mA from the +5 V supply and
10 mA from the −5 V supply.
OPTIONS
Table 1 lists the jumpers on the board and their functions.
Consult the AD8330 data sheet for further explanation of their
functions.
W1
FLTR
W2
OFST
+5V AGND
1
ENB
R1
0Ω
+5V
2
C1 +
10μF
10V
R5
49.9Ω C18
0.1μF
3
C20
0.1μF
–5V
C17
+ 10μF
10V
VPOS
ENBL
6
VPSO
4
4
IN_HI/LO
5
C16
0.01μF
VDBS
AGND
6
C6
0.1μF
INHI
OPHI
C19
0.1μF
14
+5V
13
7
CMGN1 8
C4
0.1μF
OUT_HI
C9
12pF
OUT_HI/LO
INLO
W3
UP
W4
DOWN
15
AD8330
5
+5V
+5V
C12
0.1μF
C11
0.1μF
C3
0.1μF
C5
0.1μF
16
VPSI
C2
0.1μF
C14
0.01μF
AD8131 8 3
2
1
R13
24.9Ω
OFST
R12
1kΩ
CNTR
C15
0.1μF
IN
VCMD AGND
C13
1nF
12
MODE
OPLO
VDBS
CMOP 11
CMGN
COMM
VMAG
C8
12pF
OUT_LO
10
9
C10
0.1μF
VMAG
C7
0.1μF
AGND
03721-001
Figure 1. Photograph of the AD8330 Evaluation Board
Figure 2. Schematic Diagram
Rev. B
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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
©2006 Analog Devices, Inc. All rights reserved.
EVAL-AD8330EB
Table 1. Functions of Jumpers
W3
W4
The basic board connections for a typical measurement are
shown in Figure 3. To minimize circuit-loading effects, a low
capacitance FET probe is recommended for observing input or
output waveforms. Dual circuit headers IN_HI/LO and
OUT_HI/OUT_LO are provided for this purpose. The SMA
connectors OUT_HI and OUT_LO can also be used, but the
user may need to account for load capacitance effects.
EVAL-AD8330EB BOARD DESIGN
The EVAL-AD8330EB is a 4-layer design for maximum groundplane area. The evaluation board side silkscreen and wiring
patterns are shown in Figure 4 through Figure 9.
NETWORK ANALYZER
PROBE
POWER SUPPLY
POWER SUPPLY
DIFFERENTIAL
PROBE
+5V
GND
SIGNAL
INPUT
GND
PRECISION VOLTAGE
REFERENCES
(FOR VDBS, VMAG)
03721-002
W2
MEASUREMENT SETUP
Function
Connects a high-pass filter to the offset control loop
pin. This jumper is normally not installed.
Disables the offset correction loop. This jumper is
installed for dc or low frequency operation.
Mode up. Install for ascending gain with increasing
VDBS gain control voltage.
Mode down. Install for descending gain with increasing
VDBS gain control voltage.
03721-003
Name
W1
Figure 3. Typical Connections
Rev. B | Page 2 of 4
03721-006
03721-003
EVAL-AD8330EB
Figure 4. Component-Side Silkscreen
03721-007
03721-004
Figure 7. Wiring-Side Silkscreen
Figure 5. Component-Side Wiring
03721-008
03721-005
Figure 8. Wiring-Side Pattern
Figure 6. Inner Layer 1
Figure 9. Inner Layer 2
Rev. B | Page 3 of 4
EVAL-AD8330EB
Table 2. AD8330 Parts List
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Quantity
1
1
1
1
11
2
2
2
2
1
7
3
1
1
3
10
Description
Resistor SM, 49.9 Ω, 1%, 1/16 W, 0603
Resistor SM, 24.9 Ω, 1%, 1/8 W, 1206
Resistor SM, 0 Ω, 5%, 1/8 W, 1206
Resistor SM, 1 kΩ, 1%, 1/8 W, 1206
Capacitor SM, 0.1 μF, 50 V, 1206
Capacitor SM, 0.1 μF, 16 V, 0603
Capacitor SM tantalum, 10 μF, 10 V, A
Capacitor SM, 10 nF, 50 V, 1206
Capacitor SM, 12 pF, 5%, NPO, 0603
Capacitor SM, 1 nF, 50 V, 5%, 1206
Header, 2 pin
Shunt
IC, VGA, AD8330ARQ
IC, differential amplifier, AD8131AR
Connector, SMA fem end launch
Test point
17
18
19
1
4
4
Board, PC, A00471C
Standoff aluminum round 4 to 40 × 1/2"
Pan head screw 4 to 40 × 1/4"
Reference Designator
R5
R13
R1
R12
C2, C4, C6, C7, C10, C11, C12, C15, C18, C19, C20
C3, C5
C1, C17
C14, C16
C8, C9
C13
CMGN1, IN_HI/LO, OUT_HI/ OUT_LO, W1, W2, W3, W4
CMGN1, W2, W3
DUT
A1
In, out high, out low
+5V, –5V, AGND1, AGND2, AGND3, 1GND4, ENBL,
VCMD, VDBS, VMAG
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
ORDERING GUIDE
Model
AD8330-EVAL
Description
Evaluation Board
©2006 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C03721-0-3/06(B)
T
T
Rev. B | Page 4 of 4
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