MAX4159 Evaluation Kit
_______________General Description
The MAX4159 evaluation kit (EV kit) simplifies evalua-
tion of the MAX4159 two-channel, 350MHz video multi-
plexer (mux) amplifier. The EV kit circuit demonstrates
the MAX4159 in the noninverting unity-gain configura-
tion. RF connectors (SMA) and 50Ω terminating resis-
tors are included.
The EV kit comes with the MAX4159 installed. To evalu-
ate the MAX4259, simply order a free sample
(MAX4259ESD), replace the MAX4159 with the
MAX4259 on the EV board, and change the gain-
setting resistors for the desired gain. The MAX4259’s
minimum closed-loop gain is 2V/V (6db).
____________________________Features
o
350MHz -3dB Bandwidth
o
100MHz 0.1dB Gain Flatness
o
700V/µs Slew Rate
o
0.01%/0.01° Differential Gain/Phase Error
o
Directly Drives 50Ω Cables
o
Fully Assembled and Tested
o
Low Power: 100mW
o
20ns Settling Time to 0.1%
o
20ns Channel-Switching Time
Evaluates: MAX4159/MAX4259
____________________Component List
DESIGNATION QTY
C1, C4
C2, C3
IN0, IN1, OUT
R1, R2, R3
RF
RG
SW1
U1
None
None
2
2
3
3
1
0
1
1
1
1
DESCRIPTION
0.1µF, 10% ceramic capacitors
10µF, 10V, 20% tantalum capacitors
AVX TAJB106M010 or
Sprague 293D106X0010B
SMA connectors
49.9Ω, 1% resistors
430Ω, 1% resistor
Open
DIP switch
MAX4159ESD
MAX4159 data sheet
MAX4159 PC board
______________Ordering Information
PART
MAX4159EVKIT-SO
TEMP. RANGE
-40°C to +85°C
BOARD TYPE
Surface Mount
_________________________Quick Start
The MAX4159 EV kit is fully assembled and tested.
Follow these steps to verify board operation.
1) Set all switches on DIP switch SW1 to the logic-low
(off) position.
2) Connect the power-supply grounds to the pad
marked GND. Connect a +5V supply to the pad
marked V+ and a -5V supply to the pad marked V-.
3) Connect the output marked OUT to a 50Ω termi-
nated oscilloscope input.
4) Turn on the power supply. Apply a signal of ±2.5V
(max) to the SMA connector marked IN0.
5) Verify the output signal on the oscilloscope. The out-
put amplitude will be half that on the input, due to the
voltage divider formed by the 49.9Ω back-terminating
resistor (R3) and the oscilloscope input termination.
______________Component Suppliers
SUPPLIER
AVX
Sprague
PHONE
(803) 946-0690
(603) 224-1961
FAX
(803) 626-3123
(603) 224-1430
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX4159 Evaluation Kit
Evaluates: MAX4159/MAX4259
_______________Detailed Description
Evaluating the MAX4259
The MAX4159 EV kit can also be used to evaluate the
MAX4259. Simply replace the MAX4159 with the
MAX4259 and change the gain-setting resistors for the
desired gain (2V/V min). Refer to the
Choosing
Feedback and Gain Resistors
section of the
MAX4158/MAX4159/MAX4258/MAX4259 data sheet for
more information.
Layout Considerations
The MAX4159 EV kit layout is optimized for high-speed
signals and low distortion, with careful attention given to
grounding, power-supply bypassing, and signal-path
layout. The small, surface-mount, ceramic bypass
capacitors (C1, C4) are located as close to the
MAX4159 supply pins as possible. The ground plane
has been removed around and under R
F
and R
G
to
reduce stray capacitance. Removing the ground plane
around the input SMA connectors reduces distortion.
Logic Controls
The MAX4159 EV kit has control logic for input channel
address (A0), input latch enable (LE), and output
enable (EN). DIP switch SW1 provides simple manual
control of these inputs by switching each input to V+
(logic inputs default low when the circuit is open). Table
1 lists the options available with SW1. An external con-
troller can be used by connecting the controller to the
appropriate user pad and opening the corresponding
switch (SW1_). A0, LE, and
EN
are TTL/CMOS-compati-
ble logic-level inputs.
Table 1. SW1 Settings
LOGIC
INPUTS
A0
LE
EN
SW1 SETTINGS
LOGIC LOW
Input channel 0 selected
Input address transparent
Output enabled
LOGIC HIGH
Input channel 1 selected
Input address latched
Output disabled
(high impedance)
V+
C3
10µF
10V
C4
0.1µF
V+
V-
C2
10µF
10V
IN0
7
C1
0.1µF
3
R1
49.9Ω
14
V-
A0
13
11
V+
SW1C
4
3
A0
IN0
U1
MAX4159
LE
LE
5
SW1B
2
V+
EN
R3
49.9Ω
OUT
R
F
430Ω
6
SW1A
1
V+
5
IN1
R2
49.9Ω
2
IN1
GND
EN
1
OUT
12
4
GND
FB
9
6
GND
10
R
G
OPEN
GND
GND
8
GND
ON = LOGIC HIGH
OFF = LOGIC LOW
Figure 1. MAX4159 EV Kit Schematic
2
_______________________________________________________________________________________
MAX4159 Evaluation Kit
Evaluates: MAX4159/MAX4259
1.0"
Figure 2. MAX4159 EV Kit Component Placement Guide—
Component Side
1.0"
Figure 3. MAX4159 EV Kit Component Placement Guide—
Solder Side
_______________________________________________________________________________________
3
MAX4159 Evaluation Kit
Evaluates: MAX4159/MAX4259
1.0"
Figure 4. MAX4159 EV Kit PC Board Layout—Component Side
1.0"
Figure 5. MAX4159 EV Kit PC Board Layout—Solder Side
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
___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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