EV0181 Evaluation Kit User Manual UM0181/1 July 1999 1.0 Advance Information Features • CMX018 Product Demonstration • Simple and Easy to Use Controls • 860 - 935 MHz Operation • Flexible VCO • Single 6 - 12 V Power Supply • Optional Local Oscillator Input • Audio Amplifier and Data Interface • Footprint for Front End SAW Filter 1.1 Brief Description The EV0181 Evaluation Kit comprises a single board containing the CMX018 UHF FM/FSK receiver, frequency potentiometer, VCO tank circuitry, IF filters, 79.3MHz overtone Colpitts crystal oscillator, tuned 10.7MHz quadrature tank circuit, miniature control switches and audio amplifier. A multi-turn potentiometer allows the user to select an RF operating frequency between 860 - 935 MHz. The operating bandwidth and centre frequency can be optimised by modifying the VCO tank components. The board is powered from a single 6 - 12 V dc power supply. Regulation circuitry sets the analog(AVDD) supply for 3V operation. CMX018 supply current may be measured by removing the appropriate jumper. A low profile 2-way DIL switch controls the device enable and gain select lines. Links, test points and SMA connector provide access to various points in the circuit. PCB footprints are provided to allow an external local oscillator to be connected to overcome settling time and frequency drift due to the frequency control potentiometer. 1999 Consumer Microcircuits Limited Evaluation Kit User Manual for CMX018 EV0181 CONTENTS Section Page 1.0 Features ......................................................................................................1 1.1 Brief Description.........................................................................................1 1.2 Preliminary Information .............................................................................4 1.2.1 Laboratory Equipment ................................................................4 1.2.2 Handling Precautions .................................................................4 1.2.3 Approvals ....................................................................................4 1.3 Quick Start ..................................................................................................5 1.3.1 Setting-Up....................................................................................5 1.3.2 Adjustments ................................................................................5 1.4 Signal Lists .................................................................................................6 1.5 Circuit Schematics and Board Layouts.....................................................8 1.6 Detailed Description .................................................................................12 1.6.1 Hardware Description ...............................................................12 1.6.2 Adjustments and Controls........................................................15 1.6.3 PCB Design ...............................................................................16 1.7 Performance Specification.......................................................................17 1.7.1 Electrical Performance..............................................................17 Note: This product is in development: Changes and additions will be made to this specification. Items marked TBD or left blank will be included in later issues. Information in this data sheet should not be relied upon for final product design. 1999 Consumer Microcircuits Limited 2 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 Figure 1 Block Diagram 1999 Consumer Microcircuits Limited 3 UM0181/1 Evaluation Kit User Manual for CMX018 1.2 Preliminary Information 1.2.1 Laboratory Equipment EV0181 The following laboratory equipment is needed to use this evaluation kit: 1.2.1.1 6-12V dc Power Supply 1.2.1.2 Radio Communications Test Set or similar 1.2.1.3 Oscilloscope or Audio Analyser 1.2.1.4 DVM or similar 1.2.2 Handling Precautions Like most evaluation kits, this product is designed for use in office and laboratory environments. The following practices will help ensure its proper operation. 1.2.2.1 Static Protection This product uses low power CMOS circuits which can be damaged by electrostatic discharge. Partially damaged circuits can function erroneously, leading to misleading results. Observe ESD precautions at all times when handling this product. 1.2.2.2 Contents - Unpacking Please ensure that you have received all of the items on the separate information sheet (EK0181) and notify CML within 7 working days if the delivery is incomplete. 1.2.3 Approvals This Evaluation Kit is capable of producing radio frequency emissions. Users are advised to observe local statutory requirements which may apply to this product. 1999 Consumer Microcircuits Limited 4 UM0181/1 Evaluation Kit User Manual for CMX018 1.3 EV0181 Quick Start This section provides instructions for users who wish to experiment immediately with the evaluation kit. A fuller description of the kit and its use appears later in this document. 1.3.1 Setting-Up The EV0181 comes pre-configured for an RF operating frequency of ≈ 860MHz. The receiver is enabled and configured for low LNA gain. Using suitable coaxial cable and adapters, connect RFIN, J1, to the 50Ω input of a Radio Communications test set, or similar. Ensure this input level does not exceed the power levels specified in the target device data sheet. Apply power to the input supply connector, J3, from a suitable 6-12V dc power supply. Configure the Radio Communications test set to generate a 1kHz RF modulated input at 860MHz. Set the power level to -60dBm and modulation level to 100kHz. RSSI and AUDOUT can be monitored at TP4 and TP10, respectively. Alternatively carrier detect and data can be monitored at CDN and DATAOPN, TP1 and TP2, respectively. Using a DVM, monitor the dc voltage at RSSI. Set the RF operating frequency (860 - 935 MHz) by slowly adjusting the frequency potentiometer, RV1. Adjust RV1 until the dc level at RSSI is maximum. RV1 may need to be adjusted several times due to drift and settling time of the potentiometer. The dc voltage measured at RSSI will be typically 0.7V (low gain mode) for an RF input level of 60dBm. - The recovered 1kHz tone measured at AUDOUT will be typically 0.5Vrms for a modulation level of 100kHz. Operate switch SW1:1 to enable the receiver and switch SW1:2 to toggle between high and low LNA gain modes. 1.3.2 Adjustments To tune the 10.7MHz quadrature tank circuit slowly turn the capacitor trimmer, CV1. A new RF operating frequency can be obtained by adjusting the trimmer potentiometer, RV1. 1999 Consumer Microcircuits Limited 5 UM0181/1 Evaluation Kit User Manual for CMX018 1.4 EV0181 Signal Lists CONNECTOR PINOUT Connector Ref. Connector Pin No. Signal Name Signal Type Description J1 1 RFIN I/P CMX018 RF Input J2 1 OSCIN I/P Optional Local Oscillator Input J3 1 VIN Power +ve power from external power supply 2 VSS Power 0V power from external power supply TEST POINTS Test Point Ref. Default Measurement Description TP1 - Carrier Detect output (CDN) TP2 - Data output (DATAOPN) TP3 0V VSS connection TP4 - CMX018 RSSI output, pin 14. TP5 0V VSS connection TP6 - CMX018 DETOUT output, pin 18. TP7 0V VSS connection TP8 0V VSS connection TP9 0V VSS connection TP10 - Amplified DETOUT output (AUDOUT) TP11 - CMX018 Buffered Oscillator output, pin 21. TP12 0V VSS connection TP13 0V VSS connection TP14 - Frequency Control Voltage TP15 3V AVDD connection TP16 3V AVDD connection TP17 0V VSS connection 1999 Consumer Microcircuits Limited 6 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 JUMPERS Link Ref. Positions Default Position Description JP1 1-2 S/C Disconnect to measure AVDD2 current JP2 1-2 S/C Disconnect to measure AVDD1 current ADJUSTMENTS Adjustment Ref. Adjustment Adjustment Range Description CV1 Sensitivity 5pF - 30pF 10.7MHz Quadrature Tank Circuit Tuning RV1 Frequency 0 - 3V RF Operating Frequency Control SWITCHES Switch Ref. Positions Default Position Description SW1:1 on/off on CMX018 Enable SW1:2 on/off on CMX018 Gain Select Notes: I/P = O/P = BI = Input Output Bidirectional 1999 Consumer Microcircuits Limited 7 UM0181/1 3 2u7H L1 out CF = 10.7MHz in 1 Y1 SFECA10.7MA5-Z C47 22pF C51 2 GND 56pF 220pF C52 2u7H L3 C4 DATAOPN VSS CDN TP2 TP3 TP1 22pF 1p5F C43 C42 22pF 270pF 8nH 2p7F 8p2F 8nH C44 C45 L2 CF = 90MHz C46 C2 L9 2p7F 270pF C49 C50 8nH L10 22pF GND 1 C5 R1 100k +ve -ve 3 2 RSSI 7 U1:B R2 100k MAX4326ESA +ve -ve 5 6 For U1 AVDD to Pin 8 and VSS to Pin 4. 1 C7 100nF C6 100nF TP4 C3 100pF MAX4326ESA U1:A 1p5F C40 8p2F 22pF 22pF C41 C48 R3 Y2 10k LNAOUT GND1 LNAIN MIX2IN GND3 MIX1OUT MIX1IN 14 13 12 11 10 AVDD RSSI LIMDEC2 LIMDEC1 LIMIN GND4 9 MIX2OUT 8 7 6 5 4 GND2 3 2 1 U2 5pF-30pF 17 18 19 20 21 22 23 24 25 26 27 28 QUADIN C53 AVDD R4 100nF C10 15 10nF SW1:1 LIMOUT 16 VCC3 DETOUT OSCEM OSCBA OSCOUT VCC2 TANK OSCGND VCC1 LNADEC 100nF R8 ENABLE 10k 10k R9 GAINSEL AVDD CV1 CMX018D6 Enable C9 C13 4p7F AVDD R14 C12 SW1:2 1k 3 2 Gain Select Off = +16dB On = -6dB 10k C19 C18 C17 AVDD1 AVDD1 100k 4 1 R10 C11 C16 1k 100k 200pF R11 100pF C15 5 +ve R17 2p7F 100k C20 7 For U3 AVDD to Pin 8 and VSS to Pin 4. R20 1nF 10k R19 10k L6 680nH C23 PR1 4p7F C22 AVDD1 TP10 -ve U3:A MAX4326ESA AVDD 2 AVDD 2 AVDD1 TP8 C32 1 1 100nF JP2 JP1 TP15 TP9 J2 VO 100nF C35 R24 270R 2 VI LM317LZ +3V Analog Supply AVDD TP16 TP17 VSS Not Fitted OSCIN 1uH L8 VSS +3V Supply for external PLL circuitry Not Fitted C33 N/F Not Fitted TP14 VSS Not Fitted AVDD Not Fitted 10k R23 AVDD2 TP12 10pF 10k R22 C30 N/F OSCOUT Not Fitted TP11 VSS Not Fitted N/F C29 TP7 VSS Not Fitted AUDOUT X1 79.3MHz 1 D1 SMV1233-011 C27 3 +ve 2 C26 12pF L11 N/F L11 - Alternative Resonator LL1608 (0603) Toko Inductor AVDD1 U3:B AVDD MAX4326ESA 5 6 -ve TP6 DETOUT 1nF 100pF 4.7uF(10V) C21 L5 out R18 in 220pF 680nH 2 N/F SIG 1 C24 C25 100pF C8 4.7uF(10V) 2k2 L4 C14 3 U4 R25 330R K D2 1N4001 Frequency Control RV1 TP13 VSS A AVDD2 100nF 100nF C38 Input Voltage 6V to 12V C39 R12 R13 100pF 1uH 100nF 22nH J1 R5 R6 R7 C28 10k L7 33pF 2 GND 15pF 4p7F R21 J3 100uF(10V) TP5 C34 4.7uF(10V) RF IN 5k6 560R 10k 47nF 10k 10k C54 R15 R16 A 1 VSS R26 AVDD1 C31 4.7uF(10V) 20k C37 22uF(25V) 8 47R 1999 Consumer Microcircuits Limited 1 1.5 2 Front End SAW Filter not fitted. 100pF capacitor (0603) connected between I/P and O/P. Evaluation Kit User Manual for CMX018 EV0181 Circuit Schematics and Board Layouts Figure 2 Evaluation Board - Circuit Schematic UM0181/1 C36 Evaluation Kit User Manual for CMX018 EV0181 R9 R12 RF IN J1 C36 JP1 FREQUENCY TP17 TP11 OSCOUT C29 L6 VSS TP12 VSS C28 C13 C11 R11 AVDD L5 R18 JP2 CV1 DETOUT R25 C32 R21 R20 VSS C38 TP10 AUDOUT Board Mod 1 2 3 4 R19 5 TP9 VIN U3 R17 VSS C31 + DATAOPN TP2 R4 U1 R2 R7 C53 VSS + R1 C27 R8 R22 + CDN U4 C35 R26 TP6 R5 TP16 AVDD R24 X1 C54 R15 TP1 TP5 VSS C8 C20 R14 R16 R6 R3 C10 VSS 3.00" (76.2mm) C34 + TP4 RSSI TP3 TP15 C25 L4 C14 Y1 C21 TP14 C17 L11 C22 L7 C24 C15 C6 C2 L8 C33 C30 GAIN C16 C9 U2 L1 C5 C26 C18 R23 C23 C51 C50 L3 C3 C4 L10 C12 C19 CMX018D6 C49 C52 R13 R10 C41 C40 C39 RV1 D1 + L2 C44 VSS PR1 C7 C47 C46 C45 C42 C43 C48 L9 TP8 SW1 ENABLE Y2 + TP7 VSS D2 TP13 C37 J3 3.00" (76.2mm) Note: Board material is FR4 Figure 3 Evaluation Board Layout - Assembly 1999 Consumer Microcircuits Limited 9 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 Figure 4 Evaluation Board Layout - Top Copper Figure 5 Evaluation Board Layout - Layer Two Copper 1999 Consumer Microcircuits Limited 10 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 Figure 6 Evaluation Board Layout - Layer Three Copper Figure 7 Evaluation Board Layout - Bottom Copper 1999 Consumer Microcircuits Limited 11 UM0181/1 Evaluation Kit User Manual for CMX018 1.6 EV0181 Detailed Description The EV0181 Evaluation Kit comprises a single board containing the CMX018 UHF FM/FSK receiver, frequency control potentiometer, VCO tank circuitry, IF filters, 79.3MHz overtone Colpitts crystal oscillator, tuned 10.7MHz quadrature tank circuit, miniature control switches and audio amplifier. A multi-turn potentiometer allows the user to select an RF operating frequency between 860-935MHz. The operating bandwidth and centre frequency can be optimised by modifying the VCO tank components. The board is powered from a single 6-12V dc power supply. Regulation circuitry sets the analog(AVDD) supply for 3V operation. CMX018 supply current may be measured by removing the appropriate jumper. A low profile 2-way DIL switch controls the device enable and gain select lines. Links, test points and SMA connector provide access to various points in the circuit. This open-loop configuration is not recommended for the majority of customer applications. A closedloop PLL design is required to improve controllability and overcome stability and drift problems. External PLL circuitry could be connected to test points TP11 (OSCOUT) and TP14. configuration also requires the capacitor C29 to be fitted and inductor L8 removed. This Alternatively PCB footprints are provided to allow the user drive the VCO externally from a stable source to overcome frequency drift due to the frequency control potentiometer, RV1. 1.6.1 Hardware Description 1.6.1.1 Operating Voltage The supply regulation circuitry contains a single regulator and associated components to provide the analog supply (AVDD). The operating voltage is set to 3.0V. The supply feed is split three ways to reduce interference and to enable the user to separately measure various device/circuitry currents. The supply regulation can be bypassed and external supplies applied, via jumpers JP1 - JP2. 1.6.1.2 Current Measurement Supply currents for the evaluation device and other board circuitry can be measured by removing the appropriate jumper and replacing it with a multimeter. 1.6.1.3 RF Input and LNA The RF SMA input connector, RFIN, J1, is connected to the LNAIN pin of the CMX018 via a 100pF ac coupling capacitor. This capacitor can be removed and replaced by a low loss front end bandpass SAW filter, whose frequency response is application specific. The six pad SAW filter footprint employed in the EV0181 layout is compatible with a large range of SAW filter devices available from various manufacturers. 1999 Consumer Microcircuits Limited 12 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 Typical SAW filters which may be of interest are the wide band B4637 (902 - 928 MHz), B4682 (869 894 MHz) and equivalent narrow band devices, manufactured by Siemens Matsushita Components. These SAW filters have typically 2dB insertion loss and I/O matching impedance of 50Ω. The LNA switched gain function which is used to increase the dynamic range of the receiver, is controlled by gain select switch SW1:2. In the ‘off’ position the LNA will be in high gain mode, and low gain selected when in the ‘on’ position (default). High gain mode is used where maximum sensitivity is required for low level input signals. Where high level signals are present at the receiver input, which causes difficulties due to inter-modulation, the gain of the LNA can be reduced by typically 22dB, from approximately +16dB to -6dB. The output of the LNA is fed to the first on-chip mixer (MIXIN, pin 5) via an ac coupling capacitor, C3. With a good front end band pass SAW filter no further filtering should be required at the LNA output. However, customer requirements may mean an additional SAW filter is necessary at this point, for further spurious rejection. Please refer to the CMX018 device data sheet for specifications on LNA input levels (LNAIN, pin 1). 1.6.1.4 VCO Tank Circuitry The local oscillator circuitry is formed by two capacitors, C22 and C26, a coaxial resonator, PR1, and varactor diode, D1, which is driven by the frequency control potentiometer, RV1. The dc voltage derived from the potentiometer, RV1, can be measured at TP14. Alternatively the inductor, L8, can be removed and dc control voltage applied to the VCO tank circuitry via TP14. The user may also drive the VCO externally from a stable source to overcome frequency drift due to the frequency control potentiometer, RV1. This setup is recommended if the user wishes to perform detailed measurements with the EV0181 evaluation board. The capacitor, C33, should be fitted (100pF), R23 replaced with a 0Ω resistor and inductor, L8, removed before applying an external local oscillator signal via OSCIN, J2 (not fitted). The external local oscillator signal connected to OSCIN should be at a typical input level of -10dBm. The IF filters and second IF crystal have been designed so the local oscillator frequency must be set 90MHz higher than the RF input signal, for the receiver to work correctly. For evaluation purposes space is provided for the user to fit an LL1608 Toko inductor at L11. This inductor is an alternative to the coaxial resonator, PR1. The inductor will have a typical value of 3.3nH for these operating frequencies. Capacitors C22 and C26 may need to be modified with this alternative resonator. Customers concerned about the manufacture of a coaxial resonator, PR1, may wish to consider the use of a PCB track resonator. Refer to an RF/Microwave designer’s guide to obtain more information on microstrip design. 1999 Consumer Microcircuits Limited 13 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 1.6.1.5 First IF Stage The voltage controlled local oscillator, obtained from the tank resonator circuitry, down-converts the RF input signal, such that the first IF is typically centred at 90MHz. The first IF is filtered using a 3-pole Chebyshev LC narrow bandpass filter (capacitively coupled). The filter has a 3dB pass bandwidth of approximately 3.5MHz and insertion loss of approximately 10dB. The ‘Mini Spring Air Core’ Coilcraft inductors (A03T-2) used in the filter have a tolerance of 2%. Multiple capacitor footprints have been employed in the filter layout to achieve optimum performance using preferred component values. The filter has been designed to have the same I/O matching impedance as the CMX018 I/O pins, MIX1OUT and MIX2IN, which have an impedance of 100Ω. If the user wishes to modify the IF frequencies or filter bandwidth, refer to an RF designer’s guide for information on RF filter design. 1.6.1.6 Second IF Stage A 79.3MHz overtone colpitts crystal oscillator circuit is used to down-convert the first IF, such that the second IF is centred at 10.7MHz. This oscillator stage contains a Euroquartz low profile 79.3MHz crystal in a UM-5 package and has a temperature stability of ± 20ppm. This AT third overtone mode crystal has been designed to operate with a load capacitance of 20pF. The second IF is filtered using a standard Murata 10.7MHz ceramic chip filter, Y1. The filter has a 3dB pass bandwidth of 280 ± 50kHz and 20dB attenuation bandwidth of 650kHz maximum. The maximum insertion loss specified for this filter is 6dB. The I/O matching impedance of the filter is 330Ω, therefore, a simple narrow band LC matching network has been designed around the filter for matching to the CMX018 I/O pins, MIX2OUT and LIMIN, which have an impedance of 430Ω. Refer to an RF designer’s guide to obtain information on matching networks and overtone colpitts crystal oscillators. If the user wishes to modify the IF frequencies a different crystal frequency is required. 1.6.1.7 RSSI and Demodulated Output In low gain mode an RF signal level of -100dBm at RFIN, J1, will produce an RSSI voltage at TP4 of typically 0.2V. The RSSI voltage will increase with increasing RF input level at a rate of approximately 20mV/dB up to a typical voltage of 0.7V (low gain mode) at an RF input level of -60dBm. An operational amplifier U1:A is configured as a comparator to provide a carrier detect output, CDN, at TP1. This output will go to a logic ‘0’ when the RSSI voltage level is greater than typically 300mV. The threshold level can be adjusted by modifying the potential divider resistors R5 and R6. A 10.7MHz quadrature tank circuit (CV1, C11, C13, C14, L4 and R11) is used to finally extract the baseband signal. The trimmer capacitor CV1 is used to tune the circuit whilst R11 determines the Q and thus the amplitude and distortion of the demodulated output. 1999 Consumer Microcircuits Limited 14 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 The CMX018 detector output pin (DETOUT pin 18) can be monitored via TP6. This output is first amplified using an operational amplifier U3. The amplified output can be monitored at AUDOUT, TP10. The level measured at AUDOUT will be typically 0.5Vrms for a 1kHz RF modulated input with a modulation level of 100kHz. The second amplifier (B) in the U1 package is also configured as a comparator to provide a digital output of the signal at AUDOUT. The threshold level is set to half supply using the potential divider resistors R7and R8. Note, the audio amplifier and data output stage is not a ‘total’ solution. It is designed to show that data can be recovered and should give reasonable BER for RF input levels >-90dBm (high gain mode). This output circuitry may need to be modified or bypassed depending on the user’s application. Reception of large continuous streams of 1’s or 0’s will not be possible unless the ac coupling capacitors, C53 and C54, are bypassed. 1.6.2 Adjustments and Controls 1.6.2.1 Frequency Control The trimmer potentiometer, RV1, controls the local oscillator frequency. The control voltage derived (0-3V) from this potentiometer allows the RF operating frequency to be set between 860 - 935 MHz (90MHz below local oscillator). Using a DVM, monitor the dc voltage at RSSI. Set the RF operating frequency (860 - 935 MHz) by slowly adjusting the frequency potentiometer, RV1. Adjust RV1 until the dc level at RSSI is maximum. RV1 may need to be adjusted several times due to drift and settling time of the potentiometer. The frequency control potentiometer draws a typical current of 150µA from the AVDD2 supply. 1.6.2.2 10.7MHz Quadrature Tank Tuning The trimmer capacitor, CV1, allows the user to tune the 10.7MHz quadrature tank circuit. 1.6.2.3 Enable and Gain Select The evaluation device enable and gain select lines are controlled by switch SW1. Switch SW1:1 allows the user to configure the CMX018 for zero-power. With SW1:1 in the ‘on’ position the device is enabled (default), and when SW1:1 is in the ‘off’ position the device is in zeropower mode. The LNA switched gain function which is used to increase the dynamic range of the receiver, is controlled by gain select switch SW1:2. In the ‘off’ position the LNA will be in high gain mode, and low gain selected when in the ‘on’ position (default). 1999 Consumer Microcircuits Limited 15 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 1.6.2.4 VCO Tank Circuitry The coaxial resonator consists of a length of RG405 semi-rigid cable. For operating frequencies between 950 - 1025 MHz (i.e RF input 860 - 935 MHz) the outer shield should be cut to approximately 0.256” (6.5mm). One end of the inner wire should be soldered to the outer whilst the other end should be soldered to the tank PCB pad. The resonator should be laid down and outer soldered to PCB ground plane. The overall length of the resonator should be approximately 0.343” (8.7mm). Reducing the length of the coaxial resonator, PR1, will increase the resonant frequency and vice versa. Increasing C22 and C26 will reduce resonant frequency. The capacitance ratio of C26 to varactor diode, D1, will determine the achievable operating band for the 0 - 3V control voltage. Therefore to reduce the bandwidth, reduce C26 and/or insert a small picofarad capacitor, C30. The introduction of C30 will also reduce the resonant frequency. 1.6.3 PCB Design The EV0181 PCB is a 4-layer design, with an overall thickness of 0.062” (1.57mm), including top and bottom layer copper. The top layer comprises the regulation circuitry connections, RF signal tracks and ground plane. The second layer is purely a ground plane for the supply. Layer three contains the analog power supply tracks, AVDD which feed all the board’s sub-circuits. The bottom layer contains another ground plane for additional screening. CMX018 ground pins are connected directly to the top layer ground plane as close to the package as possible. The power supply pins are bypassed to ground directly at the package using decoupling capacitors with direct returns to ground. Using microstrip techniques the RFIN track on the 4-layer PCB has been designed to provide a line impedance of 50Ω. This design technique is based on the track width and separation distance between track and ground plane for a given dielectric constant of the PCB material. The layout assumes the board material is FR4 with a ground plane on the second layer, separated from the top layer by 0.016” (0.41mm). Therefore, for a dielectric constant between 4-5 and track width of 0.032” (0.81mm), an approximate 50Ω line impedance is obtained. Refer to an RF/Microwave designer’s guide to obtain more information on microstrip line impedance design. 1999 Consumer Microcircuits Limited 16 UM0181/1 Evaluation Kit User Manual for CMX018 1.7 Performance Specification 1.7.1 Electrical Performance EV0181 1.7.1.1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the Evaluation Kit. Notes Supply (VIN - VSS) Current into or out of VIN and VSS pins Storage Temperature Operating Temperature Input Power to J1, RFIN Min. -0.3 0 -10 +10 Max. 40.0 150 +70 +35 0 Units V mA °C °C dBm Max. 12V 3.3V +35 Units V V °C Typ. Units 60 10 mA mA 1.7.1.2 Operating Limits Correct operation of the Evaluation Kit outside these limits is not implied. Notes Supply (VIN - VSS) Supply (AVDD - VSS) Operating Temperature Min. 6V 2.7V +10 1.7.1.3 Operating Characteristics For the following conditions unless otherwise specified: AVDD = 3.0V, Tamb = +25°C RFIN = 860MHz, 50Ω source impedance. Notes DC Parameters IDD (evaluation board - CMX018 enabled in high gain mode) IDD (evaluation board - CMX018 disabled) Notes: 1 2 1. SW1:1 on and SW1:2 off. 2. SW1:1 off. Refer to current CML CMX018 data sheet for further information. 1999 Consumer Microcircuits Limited 17 UM0181/1 Evaluation Kit User Manual for CMX018 EV0181 CML does not assume any responsibility for the use of any circuitry described. No IPR or circuit patent licences are implied. CML reserves the right at any time without notice to change the said circuitry and this evaluation kit specification. Evaluation kits are supplied for the sole purpose of demonstrating the operation of CML products and are supplied without warranty. They are intended for use in a laboratory environment only and are not for re-sale, end-use or incorporation into other equipments. Operation of evaluation kits outside a laboratory environment is not permitted within the European Community. All software is supplied “as is” and is without warranty. It forms part of the evaluation kit and is licensed for use only in this kit, for the purpose of demonstrating the operation of CML products. Whilst all reasonable efforts are made to ensure that software contained in this product is virus free, CML accepts no responsibility whatsoever for any contamination which results from using this software and the onus for checking that the software is virus free is placed on the purchaser of this evaluation kit. Oval Park - LANGFORD MALDON - ESSEX CM9 6WG - ENGLAND Telephone: +44 (0)1621 875500 Telefax: +44 (0)1621 875600 e-mail: [email protected] http://www.cmlmicro.co.uk