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Part: MAX4159EVKIT
Category:
Others
Description: Evaluation Kit: Max4159/max4259
Company: Maxim Integrated Products
Datasheet: Download MAX4159EVKIT datasheet File size : 472 kB
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MAX4159 Evaluation Kit
_______________General Description
The MAX4159 evaluation kit (EV kit) simplifies evaluation of the MAX4159 two-channel, 350MHz video multiplexer (mux) amplifier. The EV kit circuit demonstrates the MAX4159 in the noninverting unity-gain configuration. RF connectors (SMA) and 50 terminating resistors are included. The EV kit comes with the MAX4159 installed. To evalua t e the MAX4259, simply order a free sample ( M A X 4 2 5 9 E S D ) , replace the MAX4159 with the M A X 4 2 5 9 on the EV board, and change the gainsetting 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 50 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 49.9, 1% resistors 430, 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
T h e 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) C o n n e c t the power-supply grounds to the pad m a r k e d 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 50 terminated 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 output amplitude will be half that on the input, due to the voltage divider formed by the 49.9 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
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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 M A X 4 2 5 9 . Simply replace the MAX4159 with the MAX4259 and change the gain-setting resistors for the d e s i r e d gain (2V/V min). Refer to the Choosing F e e d b a c k and Gain Resistors s e c t i o n 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 l a y o u t . The small, surface-mount, ceramic bypass c a p a c i t o r s (C1, C4) are located as close to the MAX4159 supply pins as possible. The ground plane has been removed around and under RF and RG 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 a d d r e s s (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 controller 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-compatible 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+ VC2 10µF 10V IN0 7 C1 0.1µF 3 R1 49.9 14 VA0 13 11
V+ SW1C 4 3
A0
IN0
U1 MAX4159
LE
LE 5 SW1B 2 V+ EN R3 49.9 OUT RF 430 6 SW1A 1 V+
5 IN1 R2 49.9 2
IN1 GND
EN
1
OUT
12
4
GND FB 9
6
GND 10
RG OPEN GND
GND
8
GND
ON = LOGIC HIGH OFF = LOGIC LOW
Figure 1. MAX4159 EV Kit Schematic
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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
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