|
|
Part: MAX4001EVKIT
Category:
Analog & Mixed-Signal Processing
Description: MAX4001EVKIT Evaluation Kit For The MAX4000/MAX4001/MAX4002
Company: Maxim Integrated Products
Datasheet: Download MAX4001EVKIT datasheet File size : 155 kB
Request For quote: Find where to buy MAX4001EVKIT
Datasheet text preview:
19-2574; Rev 0; 9/02
MAX4001 Evaluation Kit
General Description
The MAX4001 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX4001 RF-detecting controller in a 9-bump chipscale package (UCSPTM). The MAX4001 EV kit includes on-board shutdown control as well as quasi-measurement mode circuitry to provide an easy method to evaluate the MAX4001. The RF input utilizes a 50 SMA connector for convenient connection to test equipment. The MAX4001 EV kit can also be used to evaluate the MAX4000 and MAX4002 RF-detecting controllers. o 50 SMA Connector on RF Input o Low-Profile Design (0.65mm, max) o On-Board Quasi-Measurement Mode Circuitry o On-Board Shutdown Control o Ultra-Compact Solution o Fully Assembled and Tested Surface-Mount Board
Features
o 2.7V to 5.5V Single-Supply Operation
Evaluates: MAX4000/MAX4001/MAX4002
Ordering Information
PART MAX4001EVKIT TEMP RANGE 0°C to +70°C IC PACKAGE 9 UCSP
N o t e : T o evaluate the MAX4000 or MAX4002, request a M A X 4 0 0 0 E B L or a MAX4002EBL free sample with the MAX4001EVKIT.
Component List
DESIGNATION C1, C3, C5 C2 C4 QTY 3 1 1 DESCRIPTION 0.1µF ±20%, 10V X5R ceramic capacitors (0402) TDK C1005X5R1A104M Not installed (0402) 2200pF ±10%, 50V X7R ceramic capacitor (0402) TDK C1005X7R1H222K 33pF ±5%, 50V C0G ceramic capacitor (0402) TDK C1005C0G1H330J 100pF ±5%, 50V C0G ceramic capacitors (0402) TDK C1005C0G1H101J 2-pin headers 3-pin header 100 ±1% resistor (0402) 52.3 ±1% resistor (0402) DESIGNATION R3 R4 R5, R6, R8 R7 RFIN U1 U2 None None None None QTY 1 1 3 1 1 1 1 3 1 1 1 DESCRIPTION 0 ±5% resistor (0402) Not installed (0402) 10.0k ±1% resistors (0402) 14.0k ±1% resistor (0402) SMA connector (PC edge-mount) MAX4001EBL-T (9-bump UCSP) Top mark: ABE MAX4412EXK-T (5-pin SC70) Top mark: ABH Shunts MAX4001 EV kit PC board MAX4000/MAX4001/MAX4002 data sheet MAX4001 EV kit data sheet
C6
1
C7, C8 JU1, JU2 JU3 R1 R2
2 2 1 1 1
Component Suppliers
SUPPLIER TDK PHONE 847-803-6100 FAX 847-390-4405 WEBSITE www.component.tdk.com
Note: Please indicate that you are using the MAX4001 when contacting this component supplier. UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX4001 Evaluation Kit Evaluates: MAX4000/MAX4001/MAX4002
Quick Start
Recommended Equipment
· One variable DC power supply capable of supplying between 2.7V and 5.5V at 50mA · One signal generator capable of delivering -35dBm t o +10dBm at frequencies between 900MHz and 2.5GHz · One voltmeter e v a l u a t e the MAX4000 and MAX4002 RF-detecting controllers. For operation in controller mode, both JU1 and JU2 should be removed. Use a DAC or external precision voltage supply to apply the set-point voltage to the SET pad. Connect the RF source (the Power Amplifier (PA) output through a directional coupler) to the RFIN SMA connector. Connect the gain control pin of the PA to the OUT pad. When used in controller mode, a capacitor (C4) must be present for loop stability (see the Filter Capacitor Selection section). To simulate an Automatic Gain-Control (AGC) loop, a quasi-measurement mode can be implemented where the MAX4001 delivers an output voltage that is proport i o n a l to the log of the input signal (see the QuasiMeasurement Mode section). To establish the transfer function of the log amp, the RF input power level should be swept while the voltage at the SET pad is measured. This is the simplest method to validate operation of the evaluation board.
Procedure
The MAX4001 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Set the variable DC power supply to 3V. 2) Ensure that the variable DC power supply is turned off. 3) Connect the positive terminal of the variable DC power supply to the pad marked VCC. Connect the ground return of the variable DC power supply to the pad marked GND. 4) Set the signal generator to produce an output signal of 0dBm at a frequency of 2.5GHz. 5) Ensure that the signal generator is turned off. 6) Connect the signal generator to the edge-mount SMA connector marked RFIN. 7) Connect the positive terminal of the voltmeter to the pad marked SET. Connect the ground return of the voltmeter to the pad marked GND. 8) Ensure that shunts are installed across jumpers JU1 and JU2. 9) Ensure that a shunt is placed across pin 1 and pin 2 of jumper JU3. 10) Turn on the variable DC power supply. 11) Turn on/enable the output of the signal generator. 12) Verify with the voltmeter that an output voltage of 1.2V (±5%) is produced between the SET pad and the GND pad.
Shutdown Control
Jumper JU3 controls the CMOS-compatible shutdown p i n (SHDN) of the MAX4001, which disables the MAX4001. Removing the shunt from JU3 allows the SHDN pin to be driven with an external signal source connected to the SHDN pad (see Table 1 for shutdown shunt positions).
Table 1. Shutdown Selection
JUMPER SHUNT POSITION 12 23 Not Installed DESCRIPTION MAX4001 enabled MAX4001 disabled SHDN pin driven by an external signal source
JU3
Quasi-Measurement Mode
Enabling the quasi-measurement mode changes the MAX4001 EV kit function from a PA controller to a log detector. This mode allows for easy measurement of RFIN versus the SET voltage and these measurements c a n then be used to find the intercept and slope required for the given application. Placing shunts across JU1 and JU2 enables the quasimeasurement mode (which connects the OUT voltage through an inverting op amp to the SET pin). The quasim e a s u r e m e n t mode yields a nominal relationship between RFIN and SET (see Table 2 for quasi-measurement mode shunt positions).
Detailed Description
The MAX4001 EV kit is a fully assembled and tested s u r f a c e - m o u n t circuit board that evaluates the MAX4001 RF-detecting controller. The MAX4001 EV kit includes on-board shutdown control as well as quasim e a s u r e m e n t mode circuitry to provide an easy method to evaluate the MAX4001. The RF input utilizes a 50 SMA connector for convenient connection to test equipment. The MAX4001 EV kit can also be used to
2
_______________________________________________________________________________________
MAX4001 Evaluation Kit
Table 2. Quasi-Measurement Mode Selection
JUMPER SHUNT POSITION Installed JU1, JU2 Not Installed Quasi-measurement mode disabled DESCRIPTION Quasi-measurement mode enabled
Evaluating the MAX4002 The MAX4001 can be replaced with the MAX4002 to allow an input range of -30dBm to +15dBm in 50. The modifications required are as follows: 1) Replace U1 with a MAX4002EBL.
Evaluates: MAX4000/MAX4001/MAX4002
Layout Considerations
A good PC board is an essential part of RF circuit design. The MAX4001 EV kit PC board can serve as a g u i d e for laying out a board using the MAX4000/ MAX4001/MAX4002. Keep traces carrying RF signals as short as possible to minimize radiation and insertion loss due to the PC board. Each VCC node on the PC board should have its own decoupling capacitor. This minimizes supply coupling from one section of the PC board to another. Using a star topology for the supply layout, in which each VCC node in the circuit has a separate connection to the central VCC node, can furt h e r minimize coupling between sections of the PC board.
Filter Capacitor Selection
W h e n functioning as a PA controller, the MAX4001 requires some capacitance to maintain loop stability. Global System for Mobile (GSM) applications require a control-loop bandwidth of at least 150kHz. A 2200pF capacitor, C4, is installed to obtain this control-loop bandwidth. Refer to the Gain and Phase vs. Frequency graph in the Applications Information section of the MAX4000/MAX4001/MAX4002 data sheet for alternative capacitor values.
Evaluating the MAX4000/MAX4002
Evaluating the MAX4000 The MAX4001 can be replaced with the MAX4000 to allow an input range of -45dBm to 0dBm into 50. The modifications required are as follows: 1) Replace U1 with a MAX4000EBL. 2) Replace C6 with a 0 (0402) resistor.
_______________________________________________________________________________________
3
Others parts begin by ma
|
|
|
