Click here for production status of specific part numbers. Evaluates: MAX2223 MAX2223 Evaluation Kit General Description Features The MAX2223 evaluation kit (EV kit) simplifies evaluation Easy Evaluation of the MAX2223 IC of the MAX2223. The MAX2223 is a low-cost, direct- Single 3.3V 5% Supply for IC conversion tuner IC designed for satellite set-top and Very On-Board 5V 5% DAC for Gain Control Small Aperture Terminal (VSAT) applications. The device directly converts the satellite signals from the LNB to base- 925MHz to 2175MHz Operating Frequency Range band using a broadband I/Q down-converter. The operating 50 SMA Connectors for the RF Ports and the frequency range extends from 925MHz to 2175MHz. The Baseband Outputs device supports an RF bandwidth of 1GHz. All Critical Peripheral Components Included This EV kit is a complete broadband satellite tuner DVB- Micro USB Port for Interfacing with a PC S2 RF front-end solution. It enables testing of the device PC Control Software (Available at performance and requires no additional support circuitry. www.maximintegrated.com/evkitsoftware) Standard 50 SMA connectors are included on the EV kit for the inputs and outputs to allow for quick and easy evaluation on the lab bench. The MAX2223 evaluation kit 2 contains a microcontroller (MCU) that uses a 2-wire I C- Ordering Information appears at end of data sheet. compatible serial interface to configure internal registers and modes. A Graphical User Interface (GUI) software running on a computer connected via USB makes it simple to program and control the device operation. The evaluation kit is fully assembled and tested at the factory. This document provides a bill of materials, a list of equipment required to evaluate the device, a straightforward test procedure to verify functionality, a description of the EV kit circuit, the circuit schematic, and artwork for each layer of the printed circuit board (PCB). 319-100421 Rev 0 8/19Evaluates: MAX2223 MAX2223 Evaluation Kit Powering and Connecting the EV Kit Quick Start Verify that all jumpers are in place. Jumper VCC Required Equipment VCO should be shorted. J2 should be shorted if one This section lists the recommended test equipment to wants to use the on-board DAC to control the RF verify operation of the MAX2223. It is intended as a guide gain. In this case, one should not apply any voltage only and some substitutions are possible. on the EXT GC pin. Pins 2-3 of J5 should be One RF signal generator capable of delivering minimum connected for default addressing. -75dBm up to 3.0GHz (Keysight N5182B or equivalent) With its output disabled, connect a 3.3V power An RF spectrum analyzer with a range of 100kHz to supply to the VCC and GND test points through an 3.0GHz (Keysight N9020A or equivalent) ammeter. If available, set the current limit to 200mA. One should account for the IR voltage drop through A dual power supply capable of up to 250mA at 3.3V the ammeter and adjust the power supply to get 3.3V 5% on one channel,15mA at 5V 5% on the other. at the EV kit power supply test pins. One digital multi-meter for measuring the supply If using an external power supply to provide the RF current (Keysight 34461A or equivalent) (optional). gain control voltage (V ), then also connect a GC1 50 coaxial RF cables with SMA connectors. power supply between the EXT GC and GND pins A user-supplied Windows 10 based PC. of the EV kit. Set the gain control voltage to 0.5V, but leave the supply powered off for now. Procedure Connect the MAX2223 EV kit to the PC running the This section provides a step-by-step guide to operating GUI through the USB cable, and power on the EV the EV kit and testing the device functions. The EV kit kit (apply +3.3V power supply to the VCC and GND is fully assembled and tested. Follow the instructions in test points). A green LED on the MCU module should the Connections and Setup section for proper device be blinking green about once per second. It will evaluation. occasionally change momentarily to a blue color but Caution: Do not turn on the DC power or RF signal will be blinking green most of the time. generators until all connections are completed. Double-click on the Max2223 EVKIT GUI.exe icon which will be on the desktop in order to start the GUI. Detailed Description of Hardware One should see that the EV kit is connected by the and Software Connected message at the bottom-right corner of the The EV kit hosts a MAX32625 microcontroller platform, GUI display. See Figure 1. and also a MAX515 serial 10-Bit DAC along with the After opening the GUI, there are two tabs: Block MAX2223. The purpose of microcontroller is to program Diagram and Register View. The block diagram the registers of MAX2223 and the DAC. The DAC is used shows a block diagram of the IC. One can change to generate an on-board analog RF gain control voltage. various widgets such as the LO Frequency, and the corresponding registers will be automatically updated. Measurement Considerations The Register View allows one to read and write the The EV kit includes on-board matching circuitry at the register contents directly. MAX2223 RF input to convert the 50 source to a 75 The default LO frequency is 950MHz. After inputting IC input. Note that the input power to the device must be a new value, press either the Tab key or the Enter adjusted to account for the 6dB power loss of the matching key for the new value to take effect. Note that in the resistor network. initial state, the PLL Lock box is not illuminated. This Download the MAX2223 EV Kit Software test procedure assumes the LO frequency is left at Download the MAX2223 EV kit software from the 950MHz. link, run the installation file and install it. To see the lock status of the PLL, simply left mouse click on the PLL Lock box in order to enable it. A Run the MAX2223 EV kit software through the desktop icon to open the GUI. check mark will appear in the box if it is enabled. If everything is functioning normally, one should see Note that the GUI will only run on Window 10 PCs. the GUI change to resemble Figure 1. Note that the PLL Lock widget is now illuminated green and one of Maxim Integrated 2 www.maximintegrated.com