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EV0171
Evaluation Kit User Manual
UM0171/2 May 1999 Advance Information
1.0
Features
* * * *
* CMX017 Product Demonstration * 860 - 935 MHz Operation * Direct FM/FSK Modulation * Adjustable Output Power up to +20dBm
Simple and Easy to Use Controls Single 6 - 12 V Power Supply Powersave and Zero-Power Modes Optional access to PAIN and MODOUT
1.1
Brief Description
The EV0171 Evaluation Kit comprises a single board containing the CMX017 UHF FM/FSK transmitter, frequency and gain potentiometers, VCO tank circuitry and miniature control switches. 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. CMX017 supply currents may be measured by removing appropriate jumpers. A low profile 2-way DIL switch controls the device enable lines, to obtain CMX017 powersave and zero-power modes. Links, test points and an SMA connector provide access to various points in the circuit.
(c) 1999 Consumer Microcircuits Limited
Evaluation Kit User Manual for CMX017
EV0171
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 .......................................................... 13 1.6.3 PCB Design................................................................................... 14 1.7 Performance Specification .......................................................................... 15 1.7.1 Electrical Performance ................................................................ 15
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.
(c) 1999 Consumer Microcircuits Limited
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EV0171
Figure 1 Block Diagram
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1.2
1.2.1
Preliminary Information
Laboratory Equipment The following laboratory equipment is needed to use this evaluation kit:
1.2.1.1 6 - 12 V dc Power Supply 1.2.1.2 Radio Communications Test Set or similar 1.2.1.3 Modulation source 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 (EK0171) 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.
(c) 1999 Consumer Microcircuits Limited
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1.3
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 EV0171 comes pre-configured for an RF operating frequency of 860MHz. The output power at PAOUT, J1, is set to approximately 100mW when terminated with 50. Using suitable coaxial cable and adapters, connect PAOUT, J1, to the 50 input of a Radio Communications test set, or similar. Ensure this input can accept power levels > +20dBm without damage. Use an appropriate 50 inline attenuator if necessary. Connect MODIN, TP1, to the output of a modulation (FM or FSK) source. Ensure the signal level does not exceed the maximum level specified in device datasheet. Select the required RF operating frequency (860 - 935 MHz) by setting the frequency potentiometer, RV2. Apply power to the input supply connector, J2, from a suitable 6 - 12 V dc power supply. Operate switches SW1:1 and SW1:2 to enable the PA stage and modulator respectively. To minimise the regulator (U2) power dissipation whilst operating for long periods with maximum gain, it is recommended that the input voltage, VIN, is kept below 9V.
1.3.2
Adjustments To adjust the gain of the CMX017 PA driver slowly turn the trimmer potentiometer, RV1. Using RV1, the power level at PAOUT can be adjusted by typically 20dB. A new RF operating frequency can be obtained by adjusting the trimmer potentiometer, RV2.
(c) 1999 Consumer Microcircuits Limited
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1.4
Signal Lists
CONNECTOR PINOUT
Connector Ref. J1 J2
Connector Pin No. 1 1 2
Signal Name
PAOUT
Signal Type O/P Power Power BI
Description CMX017 PA Output +ve power from external power supply 0V power from external power supply CMX017 PA Input or Modulator Output
VIN VSS
PAIN or MODOUT
J3
1
TEST POINTS Test Point Ref. TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 Default Measurement 0V 3V 0V 0V 0V 0V Description CMX017 Modulator Input VSS connection AVDD connection VSS connection VSS connection VSS connection VSS connection CMX017 Buffered Oscillator Output Frequency Control Voltage
JUMPERS Link Ref. JP1 JP2 JP3 Positions 1-2 1-2 1-2 Default Position
S/C S/C S/C
Description Disconnect to measure AVDD3 current Disconnect to measure AVDD2 current Disconnect to measure AVDD1 current
(c) 1999 Consumer Microcircuits Limited
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ADJUSTMENTS Adjustment Ref. RV1 RV2 Adjustment Gain Frequency Adjustment Range 0 - 3V 0 - 3V Description CMX017 PA Driver Gain RF Operating Frequency Control
SWITCHES Switch Ref. SW1:1 SW1:2 Positions on/off on/off Default Position on on Description CMX017 PA Enable CMX017 Modulator Enable
Notes: I/P = O/P = BI =
Input Output Bidirectional
(c) 1999 Consumer Microcircuits Limited
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1.5
TP3
JP1
Frequency Control J3 PAIN or MODOUT
Not Fitted
JP2
AVDD3
2 1
AVDD +3V Analog Supply Input Voltage 6V to 12V
Signal can be routed to the PA input or from the modulator output by modifying components L7, C14, C15 and C31. Modulator and PA Driver AVDD2
2 1
J2
1 2
L6
C31
100nH
2 1 A 1 VO VI
C9 RV1
C6 100pF
C26 4.7uF(10V) C28 1uF(16V) R8
L7
AVDD1
C14 C15
R9 330R R10 47R
OSCOUT
TP8 C32
100pF
L1
100nH
100pF C11
1 VCC3 GAIN GND3 27 PAIN 2 28
100pF
L8 22nH C20 C21 100pF C23 100nH
L9
AVDD2
3 GND4 GND5 GND6 IPAOUT GND7 GND8 PAOUT 1 GND9 SIG GND10 MODIN 18 OSCGND 19 TANK 20 GND1 21 VCC1 22 OSCOUT 23 MODOUT 4
26 25 24
C1
C5
C8
L5
1.2nH
100pF
4.7uF(10V)
5
20k
C25
Circuit Schematics and Board Layouts
C3
11
L4
3.3pF
22nH
2
AVDD1 AVDD2
R5 10k
L3
100nH
100pF
C12
TXRESRG405
GND
GND
SMV1233-011
14
15
GND
13 ENLPA ENLMOD
16
PR1
VCC4
GND
D1
12
17
C22
C24
TP9
100uF(10V)
C2
10
10pF
15pF
10k
4k7
100pF
3.3nH
C27
1k
R1
R3
1k
100pF
C13
C7
C10
4
4.7uF(10V) C4
100pF
PA Enable
SW1:1
1 2
SW1:2
3
MOD Enable
R2
100k
R4
100k
100R
Figure 2 Evaluation Board - Circuit Schematic
2 3
R6
8
CMX017D6
VCC2 6 7 8 9
4.7uF(10V)
U1
GND2
C17
100pF
AVDD3 Frequency Control
PAOUT J1
C16 R7 R11 C18 C19 100pF
100pF
L2
RV2
TP1
TP4
TP5
TP6
TP7
MODIN
Baseband Modulation Input
VSS
VSS
VSS
VSS
TP2
C30 100nF(16V)
CMX017 OSCOUT signal can be routed to TP8 by fitting C32.
22uF(25V)
20k
C29
(c) 1999 Consumer Microcircuits Limited
AVDD2 PA and IPA AVDD1
TO-220 JP3
K
LM317T U2
Evaluation Kit User Manual for CMX017
D2 1N4001
A
270R
EV0171
UM0171/2
Evaluation Kit User Manual for CMX017
EV0171
PAIN or MODOUT J3 C6 C9 TP5 J1 PAOUT L1 C1 C5 C8 C2 L2 C3 C10 C7 C4 L3 TP4 PA Enable
R2 L4 L5
Board Mod 1234 TP6
L6
5
C27 GAIN + RV1 C31 L7
C15 C17
OSCOUT TP8 L8 C25 C32 L9
C11
C14
+
JP1 RV2 FREQUENCY
TP7 VSS
C20
+
C12 +
U1 CMX017D6 R1 R3 MOD Enable R4
C16
C18 C21
C23 D1
C24 R7
C22
TP9 R11 VIN J2 VSS C29
C19
C13
2.70 IN
+
R9 R10 D2
C30
PR1
C26
+
R8
JP2 JP3
SW1 R5 R6 MODIN VSS U2 TP3 AVDD
TP1
TP2
2.70 IN
Note: Board material is FR4 Figure 3 Evaluation Board Layout - Assembly
(c) 1999 Consumer Microcircuits Limited
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Figure 4 Evaluation Board Layout - Top Copper
Figure 5 Evaluation Board Layout - Layer Two Copper
(c) 1999 Consumer Microcircuits Limited
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Figure 6 Evaluation Board Layout - Layer Three Copper
Figure 7 Evaluation Board Layout - Bottom Copper
(c) 1999 Consumer Microcircuits Limited
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1.6
Detailed Description
The EV0171 Evaluation Kit comprises a single board containing the CMX017 UHF FM/FSK transmitter, frequency and gain potentiometers, VCO tank circuitry and miniature control switches. A multi turn potentiometer allows the user to select an RF operating frequency between 860935MHz. The operating bandwidth and centre frequency can be adjusted by simply 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. CMX017 supply currents may be measured by removing appropriate jumpers. A low profile 2-way DIL switch controls the device enable lines, to obtain CMX017 powersave and zero-power modes. 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 closed-loop PLL design is required to improve controllability and overcome stability and drift problems. External PLL circuitry could be connected to test points TP8 (OSCOUT) and TP9 after removal of RV2.
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-JP3. Note, due to the inductors dc resistance which is approximately 0.5 (100nH), small voltage drops will occur across inductors L3 and L1. 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 VCO Tank Circuitry The tank resonator circuit is formed by two capacitors, C16 and C19, RG405 coaxial resonator, PR1, and varacter diode, D1, which is driven by the frequency control potentiometer, RV2. The dc control voltage derived from the frequency control potentiometer, RV2, can be measured at TP9. Alternatively the potentiometer can be removed and control voltage applied to the VCO tank circuitry via the test point TP9.
(c) 1999 Consumer Microcircuits Limited
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1.6.1.4 FM/FSK Modulator The modulation input, MODIN, TP1, is designed to be directly driven by a dc-coupled baseband input signal, to generate a frequency modulated (FM or FSK) RF signal. Please refer to the CMX017 device datasheet for specifications on maximum modulation frequency/voltage at the device input (MODIN, pin 18). The resistors R6 and R5 can be modified depending on the modulation source and required frequency deviation. The output impedance at the CMX017 MODOUT pin is typically 50. Using microstrip techniques the MODOUT track on the 4-layer PCB has been designed to provide a line impedance of 50. The CMX017 Modulator output signal can be routed to an SMA connector (not fitted), J3, by modifying components C14, C15, C31 and L7. 1.6.1.5 Power Amplifier The input/output impedances at the CMX017 PAIN/PAOUT pins are typically 50. Using microstrip techniques their tracks on the 4-layer PCB have been designed to provide line impedances of 50. Additional power gain improvement is achieved by employing the simple output matching network, C2, C3 and L2. Both amplifier output stages, IPAOUT and PAOUT, must have a dc connection to the supply rail through RF chokes, L4 and L5. The evaluation device can be used as a standalone UHF Power Amplifier by modifying components C14, C15, C31 and L7. The RF signal should be input via an SMA connector (not fitted), J3. 1.6.2 Adjustments and Controls
1.6.2.1 Frequency Control The trimmer potentiometer, RV2, controls the RF operating frequency. The control voltage derived (03V) from this potentiometer allows the RF operating frequency to be set between 860 - 935MHz. The frequency control potentiometer draws a typical current of 150A from the AVDD3 supply. 1.6.2.2 Gain Control The trimmer potentiometer, RV1, controls the gain of the CMX017 PA driver. The output power, at the MODOUT pin, is variable over a 20dB range. The output power is maximum when the CMX017 GAIN pin is connected to 3V and is reduced by typically 20dB when this pin is connected to 0V. The gain potentiometer draws a typical current of 150A from the AVDD2 supply.
(c) 1999 Consumer Microcircuits Limited
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1.6.2.3 Powersave and Zero-Power Modes The evaluation device enable lines are controlled by switch SW1. This switch allows the user to configure the CMX017 transmitter for powersave or zero-power. The Modulator and Buffered Oscillator stages of the evaluation device can be powered down independently of the PA Driver and Power Amplifier stages. In SLEEP mode (SW1:1 and SW1:2 are Off) all sections of the device are powered down and the device current consumption is reduced to typically 10A. This is the zero-power mode. In TRANSMIT-STANDBY mode (SW1:1 is Off and SW1:2 is On) only the PA Driver and Power Amplifier stages are powered down, whilst the Modulator and Buffered Oscillator remain active. In TRANSMIT mode (SW1:1 and SW1:2 are On) both the Modulator and Power Amplifier sections of the device are fully operational.
1.6.2.4 VCO Tank Circuitry
The coaxial resonator, PR1, consists of a length of RG405 semi-rigid cable. The outer is cut to approximately 0.370" (9.4mm). One end of the inner is soldered to the outer whilst the other is soldered to the tank PCB Pad. The resonator is laid down and outer soldered to PCB ground points using tinned wire. The overall length of the resonator is approximately 0.430" (11mm). Reducing the length of the coaxial resonator will increase the resonant frequency and vice versa. Increasing C16 and C19 will reduce resonant frequency. The capacitance ratio of C19 to varactor diode, D1, will determine the achievable operating band for the 0-3V control voltage. Therefore to reduce the bandwidth, reduce C19 and/or insert a small picofarad capacitor, C22. The introduction of C22 will also reduce resonant frequency. 1.6.3 PCB Design The EV0171 PCB is a 4-layer design, with an overall thickness of 0.062", including top and bottom layer copper. The top layer comprises the regulation circuitry connections, RF signal tracks and CMX017 ground plane. The second layer is purely a ground plane for the supply. Layer three contains The bottom layer the analog power supply tracks, AVDD which feed all the board's sub-circuits. contains another ground plane for screening purposes. CMX017 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 PAOUT and PAIN/MODOUT tracks on the 4-layer PCB have been designed to provide line impedances of 50. 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". Therefore, for a dielectric constant between 4-5 and track widths of 0.032", approximately 50 line impedances are obtained. Refer to an RF/Microwave designer's guide to obtain more information on microstrip line impedance design.
(c) 1999 Consumer Microcircuits Limited
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1.7
1.7.1
Performance Specification
Electrical Performance
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 PAIN, J3 (not fitted) Min. -0.3 0 -10 +10 Max. 40.0 +1.5 +70 +35 +7 Units V A C C dBm
1
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 Max. 12V 3.3V +35 Units V V C
1.7.1.3 Operating Characteristics For the following conditions unless otherwise specified: AVDD = 3.0V, Tamb = +25C RF = 860MHz, 50 load impedance. Notes DC Parameters IDD (evaluation board - output power = + 20dBm) IDD (evaluation board - PA and MOD disabled) 2 3 Min. Typ. 135mA 5mA Max. Units
Notes:
1. With optional SMA connector fitted. 2. SW1:1 and SW1:2 are on 3. SW1:1 and SW1:2 are off.
Refer to current CML CMX017 data sheet for further information.
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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.
1 WHEATON ROAD WITHAM - ESSEX CM8 3TD - ENGLAND
Telephone: +44 1376 513833 Telefax: +44 1376 518247 e-mail: sales@cmlmicro.co.uk http://www.cmlmicro.co.uk

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