MAX4223EVKIT-SO [MAXIM]
Optional Adjustable Gain;
| 型号： | MAX4223EVKIT-SO |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Optional Adjustable Gain |
| 文件： | 总4页 (文件大小：55K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1281; Rev 0; 8/97
MAX4 2 2 3 Eva lu a t io n Kit
Evluates:3/MAX24
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ 1GHz -3dB Bandwidth
The MAX4223 evaluation kit (EV kit) simplifies evalua-
tion of the 1GHz, low-power MAX4223 current-feed-
back amplifier. The EV kit circuit demonstrates the
MAX4223 in the noninverting unity-gain configuration.
RF-style connectors (SMA) and 50Ω terminating resis-
tors are included for test equipment compatibility.
♦ 300MHz 0.1dB Gain Flatness
♦ 1100V/µs Slew Rate
♦ ±5V Supply Operation
The MAX4223 EV kit uses a PC board design optimized
for high-frequency amplifiers. This board can also be
used to evaluate the MAX4224 and other Maxim ampli-
fiers that share the same pinout .
♦ Optional Adjustable Gain
♦ High-Impedance Shutdown Mode
♦ Fully Assembled and Tested
______________Ord e rin g In fo rm a t io n
____________________Co m p o n e n t Lis t
DESIGNATION QTY
DESCRIPTION
PART
TEMP. RANGE
BOARD TYPE
C1, C2
2
0.1µF, 10% ceramic capacitors
MAX4223EVKIT-SO
-40°C to +85°C
Surface Mount
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010 or
Note: To evaluate the MAX4224, request a MAX4224ESA free
sample.
C3, C4
2
Sprague 293D106X0010B
R1, R2
RF
2
1
0
2
1
1
1
1
1
49.9Ω, 1% resistors
560Ω, 5% resistor
Open
_________________________Qu ic k S t a rt
The MAX4223 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
RG
IN, OUT
U1
SMA connectors
MAX4223ESA
3-pin header
1) The circuit requires supply voltages of ±2.85V to
±5.5V. For evaluation purposes, connect a +5V sup-
ply to the pad labeled VCC and a -5V supply to the
pad labeled VEE. Connect the power-supply ground
to the pad labeled GND.
JU1
None
None
None
Shunt for JU1
PC board
MAX4223 data sheet
2) Verify that the shunt is across pins 1 and 2 of jumper
JU1.
3) Connect the output labeled OUT to an oscilloscope
input. For best performance, terminate the output
with a 50Ω load.
______________Co m p o n e n t S u p p lie rs
4) Turn on the power supply. Apply a signal of ±2.5V
maximum to the SMA connector labeled IN.
SUPPLIER
AVX
Sprague
PHONE
FAX
(803) 946-0690
(603) 224-1961
(803) 626-3123
(603) 224-1430
5) Verify the output signal on the oscilloscope.
Note: When using a 50Ω-terminated oscilloscope input,
the output amplitude observed will be half that of the
input, due to the voltage divider formed by the 49.9Ω
back-terminating resistor (R1) and the oscilloscope
input termination impedance.
Note: Please indicate that you are using the MAX4223 when
contacting these component suppliers.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX4 2 2 3 Eva lu a t io n Kit
Vo lt a g e Ga in Ad ju s t m e n t
The MAX4223 is optimized for applications requiring a
gain of +1 (0dB) or greater. Its gain can be set by
_______________De t a ile d De s c rip t io n
S h u t d o w n Co n t ro l
The MAX4223 p rovid e s a s hutd own p in (SHDN) to
enable or disable the output. Table 1 lists the options
available for the shutdown control jumper, JU1. To use
an external controller, remove the shunt on JU1 com-
pletely and connect the external controller to the pad
labeled SHDN. SHDN is a TTL/CMOS logic-level input.
changing the feedback (R ) and gain-set (R ) resis-
F
G
tors. For improved performance at a gain of +2 (6dB)
or greater, replace the MAX4223 with a free sample of
the MAX4224. Refer to the MAX4223–MAX4228 data
sheet for recommended feedback-resistor values.
La yo u t Co n s id e ra t io n s
The PC board layout has been optimized for high-
speed signals and low distortion, with careful attention
given to grounding, power-supply bypassing, and sig-
nal-path layout. The small, surface-mount, ceramic
bypass capacitors (C1 and C2) have been placed as
close to the amplifier’s supply pins as possible. The
ground plane has been removed around and under the
amplifier to reduce stray capacitance. Capacitance at
the inverting input pins has been minimized by reduc-
ing the length and width of the input and feedback
traces, and by using 0805-size surface-mount feed-
back and gain-set resistors.
Table 1. Jumper JU1 Functions
MAX4223
SHDN PIN
SHUNT
LOCATION
MAX4223
OUTPUT
1 & 2
2 & 3
Connected to V
Enabled
Disabled
CC
Connected to GND
3
JU1
1
8
7
2
SHDN
VCC
N.C.
IN-
SHDN
1
Evluates:3/MAX24
MAX4223
2
V
CC
C4
10µF
10V
R
OPEN
G
C2
0.1µF
OUT
N.C.
6
OUT
IN+
3
4
R1
49.9Ω
IN
R2
49.9Ω
5
VEE
V
EE
C3
10µF
10V
C1
0.1µF
R
F
560Ω
Figure 1. MAX4223 EV Kit Schematic
_______________________________________________________________________________________
2
MAX4 2 2 3 Eva lu a t io n Kit
Evluates:3/MAX24
1.0"
Figure 2. MAX4223 EV Kit Component Placement Guide
1.0"
1.0"
Figure 3. MAX4223 EV Kit PC Board Layout—Component Side
Figure 4. MAX4223 EV Kit PC Board Layout—Solder Side
_______________________________________________________________________________________
3
MAX4 2 2 3 Eva lu a t io n Kit
NOTES
Evluates:3/MAX24
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
4 _____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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