Order this document by MC2800EVK/D Freescale Semiconductor, Inc. MC2800EVK Advance Information Paging RF/IF Receiver Board This document contains the information of a FLEX paging receiver reference prototype. This FLEX paging receiver board is a high performance RF/IF front–end for using in FLEX pager. This board employs Motorola’s high frequency Features: • • • • • • transistors MMBR941 as well as its M–ary FSK FM IF receiver MC2800 as the core. The whole board includes a LNA, an oscillator, a mixer and a FSK IF receiver. ARCHIVE INFORMATION ARCHIVE INFORMATION Freescale Semiconductor, Inc... FLEX ORDERING INFORMATION Input RF Frequency: 284.14 MHz Excellent Sensitivity: –124 dBm Operating Voltage: VCC = 1.1 to 1.7 V Device Description MC2800EVK FLEX Paging Receiver Board Evaluation Kit Total Current Consumption: 3.2 mA @ VCC = 1.1 V Switchable Bit–Rate Filter to Support All Kinds of FLEX Data Rate Separate Interfacing Supply Voltage FLEX is a trademark of Motorola, Inc. Figure 1. System Block Diagram 455 kHz Ceramic Filter SAW Filter RF Input Crystal Filter Mixer IF FSK Receiver MC2800 LNA Local Oscillator This document contains information on a new product. Specifications and information herein are subject to change without notice. Motorola, Inc. 1999 MOTOROLA RF/IF DEVICE DATA For More Information On This Product, Go to: www.freescale.com 2 2–Bit Output To FLEX Decoder 4 4–Bit Control Lines Rev 0 1 2 RF In X1 C17 1.0 nF C2 5.0 pF C11 10 nF L1 27 nH C4 1.0 nF C13 10 pF L9 18 nH C12 7.0 pF L3 2.7 µ F R6 430 Ω Q4 C1 2.0 pF R1 6.8 kΩ R5 750 Ω L4 33 µ F C14 5.0 pF R7 110 Ω D1 Q1 TP1 C16 100 pF L6 22 nH C21 1.0 pF 12 C60 100 nF C6 10 nF L2 33 nH C8 100 pF C5 10 nF 1 R4 200 Ω 5 6 C10 2.0 pF C3 7.0 pF C53 100 nF C23 22 pF R14 100 kΩ R15 100 kΩ R16 100 kΩ C47 100 nF VDD–E C55 4.7 µF C18 Not Used FILTER1 SAFC284E75N VCC C58 56 pF C48 100 nF R10 820 Ω R9 3.0 kΩ FILTER3 CFWC455D L8 4.7 µF C73 1.0 µF FILTER2 Crystal Filter 21.4 MHz C26 12 pF C30 100 nF 2 C46 100 nF 32 31 3 4 6 R19 100 k Ω 5 7 8 C44 22 nF C43 2.2 nF 12 29 1 13 28 C49 100 nF C56 Not Used C38 3.0 pF C45 3.3 nF TP2 TP3 C51 10 C40 4.7 µF 100 nF 9 11 15 14 26 27 30 16 25 MC2800 24 23 22 21 20 19 18 17 C57 C54 100 nF 100 pF C25 0.5 pF Q3 L7 39 nH R12 10 MΩ C27 1.0 nF C52 47 pF X2 R17 100 kΩ R18 100 kΩ R13 10 MΩ R3 2.4 kΩ Gnd For More Information On This Product, MOTOROLA RF/IF DEVICE DATA Go to: www.freescale.com ARCHIVE INFORMATION C20 12 pF C32 10 nF C19 4.0 pF L5 39 nH C15 100 nF R2 Q2 820 Ω C9 100 nF Vreg Figure 2. RF/IF Receiver Board Schematic ARCHIVE INFORMATION Freescale Semiconductor, Inc... R11 7.1 kΩ C39 1.0 nF C50 10 µF VCC C36 100 nF L10 6.8 µH C41 0.1 µF C61 100 pF C37 2.0 pF C42 4.7 µ F Freescale MC2800EVK Semiconductor, Inc. Figure 2. Freescale MC2800EVK Semiconductor, Inc. RECOMMENDED OPERATING CONDITIONS Characteristic Operating Voltage Symbol Min Typ Max Unit VCC 1.1 – 1.7 V 284.135 – 284.145 MHz 3.0 – 3.3 V RF Input Frequency FLEX Decoder Interface Voltage VDD–E ELECTRICAL CHARACTERISTICS (VCC = 1.1 V, VDD–E = 3.3 V, Vreg = 0.960, fRF = 284.140 MHz, unless otherwise noted.) Characteristic Conditions Symbol Min Typ Max Unit GP – 20.6 – dB S11 – –4.2 – dB Zout – 173 +j75 – Ω NF – 2.45 – dB I – 890 – µA – 1.0 – dB fC – 65.681250 – MHz fLO1 – 262.74194 – MHz PLO – –23.9 – dBm H3 – –13.5 – dBc H5 – –11.3 – dBc – <4.5 – ms Power Gain [Note 1] Input Return Loss [Note 1] ARCHIVE INFORMATION Freescale Semiconductor, Inc... @ 284 284.140 140 MHz Output Impedance [Note 1] Noise Figure [Note 1] Current Consumption Vreg = 0.960 V SAW FILTER Insertion Loss Terminating Impedance = 230 Ω FIRST LOCAL OSCILLATOR Crystal Frequency Desired Output Frequency 4th Harmonic Desired Output Power 3rd Harmonic Output Power Referenced to 4th Harmonic 5th Harmonic Output Power Startup Time EN transits from ’0’ to ’1’ Vreg = 0.960 V I – 560 – µA Input @ 284.140 MHz Output @ 21.400 MHz GC – 32.4 – dB NF – 2.69 – dB Output Impedance @ 21.400 MHz Zout – 1.13 – j1.16 – kΩ Current Consumption of Mixer Vreg = 0.960 V I – 330 – µA – 0.9 – dB Zin – 770 – j550 – Ω fLO2 – 20.94506 – MHz – <1.0 – ms Current Consumption LNA + SAW FILTER + MIXER Conversion Gain [Note 2] Noise Figure [Note 2] CRYSTAL FILTER Insertion Loss Terminating Impedance = 1.5 kΩ IF RECEIVER MC2800 Input Impedance @ 21.400 MHz Second Local Oscillator Frequency Startup Time of 2nd LO EN transits from ’0’ to ’1’ NOTES: 1. Output of the LNA is matched to 230 Ω by inserting a 180 Ω resistor in series with its output port. 2. Output of the Mixer is matched to 1.5050 kΩ by inserting a 1500 Ω resistor in series with its output port. 3. The circuit of this test board is the same as the schematic in Figure 2. MOTOROLA RF/IF DEVICE DATA For More Information On This Product, Go to: www.freescale.com 3 ARCHIVE INFORMATION LOW NOISE AMPLIFIER Freescale MC2800EVK Semiconductor, Inc. ELECTRICAL CHARACTERISTICS (continued) (VCC = 1.1 V, VDD–E = 3.3 V, Vreg = 0.960, fRF = 284.140 MHz, unless otherwise noted.) Characteristic Conditions Symbol Min Typ Max Unit – –124 – – –125 – Co–channel Rejection – –6.0 – Adjacent Channel Rejection Low Side High Side – – 71 58 – – – – 62 65 – – – – 48 48 – – – – 74 77 – – @ VCC = 1.1 V EN = ’1’ and CL = ’0’ @ VCC = 1.1 V EN = ’0’ and CL = ’0’ – 3.18 – mA – <30 – µA @ 284.140 MHz R1 = ’0’ and R2 = ’1’ @ 284.140 MHz R1 = ’1’ and R2 = ’0’ – –120 – – –125 – Co–channel Rejection – –10 – Adjacent Channel Rejection Low Side High Side – – 63 55 – – – – 55 57 – – – – 43 42 – – – – 69 75 – – – 3.18 – mA – <30 – µA OVERALL RECEIVER PERFORMANCE (a) Phase A Characteristics [Note 3] ARCHIVE INFORMATION Freescale Semiconductor, Inc... 1600/2 Level FSK Image Rejection First IF Second IF Intermodulation Rejection Low Side High Side dBm @ 284.140 MHz R1 = ’0’ and R2 = ’1’ @ 284.140 MHz R1 = ’1’ and R2 = ’0’ dB dB 6400/4 Level FSK @ 284.140 MHz R1 = ’0’ and d R2 = ’1’ dB Blocking Rejection @ 1.0 MHz @ 5.0 MHz Total Current Consumption Power Up Power Down dB dB IT (b) Phase B Characteristics [Note 3] Sensitivity 6400/4 Level FSK 1600/2 Level FSK Image Rejection First IF Second IF Intermodulation Rejection Low Side High Side dBm dB dB 6400/4 Level FSK @ 284.140 MHz R1 = ’0’ and d R2 = ’1’ dB Blocking Rejection @ 1.0 MHz @ 5.0 MHz Total Current Consumption Power Up Power Down dB dB IT @ VCC = 1.1 V EN = ’1’ and CL = ’0’ @ VCC = 1.1 V EN = ’0’ and CL = ’0’ NOTES: 1. Output of the LNA is matched to 230 Ω by inserting a 180 Ω resistor in series with its output port. 2. Output of the Mixer is matched to 1.5050 kΩ by inserting a 1500 Ω resistor in series with its output port. 3. The circuit of this test board is the same as the schematic in Figure 2. 4 For More Information On This Product, MOTOROLA RF/IF DEVICE DATA Go to: www.freescale.com ARCHIVE INFORMATION Sensitivity 6400/4 Level FSK Freescale MC2800EVK Semiconductor, Inc. This FLEX paging receiver board uses Motorola’s NPN silicon low–noise high–frequency transistors MMBR941 to construct the functional RF blocks, including a LNA, an oscillator and a mixer. The M–ary FSK IF receiver MC2800 performs the second down–conversion and demodulates the received FSK signal into two digital output bits. The LNA employs cascode architecture (Q1 and Q2) with its output being matched to 230 Ω, the input impedance of the 284 MHz SAW filter. The input matching network should be changed when an antenna precedes the LNA. Special care must be taken in characterizing the LNA and antenna to acheive a good interface match. The local oscillator (Q4) uses a Colpitts structure. Its output is bandpass filtered to obtain the 4th harmonic. The values of C12 and C13 can be altered to fine tune the LO frequency. L9 is added in this capacitor network to increase the oscillator gain. A common emitter circuit (Q3) is used as the mixer with both LO and RF being ac–coupled to its base. Its output is dc–coupled to the 21.4 MHz crystal filter. To minimize the distortion of the downconverted frequency spectrum, the filter output must be matched to MIX_IN of the MC2800. For the characteristics of the MC2800 as well as its control (EN & CL pins) and bit–rate filter (R1 & R2 pins) setup, please refer to the MC2800 data sheet. It is recommended that a single ceramic filter configuration be used. That is, a 455 kHz 6–pole filter (FILTER3 in Figure 2) is inserted between the MIX_OUT and IF1_IN, and a 1.0 µF multi–layer ceramic chip capacitor (C73 in Figure 2) is connected between the IF1_OUT and IF2_IN. Although it is noted in the data sheet of MC2800 that 3.0 to 4.0 dB performance degradation is observed in the single ceramic filter application, this performance degradation does not occur in the overall RF/IF system performance. This is because the high gain and the low NF of the RF front end have effectively reduced the noise contribution of the MC2800 to the overall system. FDB Interface This pager board uses an 11–pin surface mount socket to interface with the pager baseband board or the FLEX Development Board (FDB). This interface provides 3 digital output pins (BDOut, D1 & D2), one audio output pin, 4 control pins (EN, CL, R1 & R2) and 3 supply pins (VCC, VDD–E & Gnd). The pin descriptions are summarized in the following table and the footprint of this socket is depicted in Figure 3. In order to provide a default state for these input pins, pull up resistors (R17 & R18) are used at both R1 & R2 input pins whereas a pull down resistor (R19) is connected at the CL input pin. Note: For general information regarding FLEX products, please contact the local Motorola SPS Sales Office or the web at http://www.mot–sps.com PIN FUNCTION DESCRIPTION Pin Symbol Description 1 Audio Output Symbol rate filter output. 2 R2 Control bits of the MC2800 bit–rate filter. Default value = ’1’. 3 R1 4 CL Pre–charge and reset of the MC2800. Default value = ’0’. 5 VDD–E Operating voltage of FLEX decoder used. 6 VCC Battery supplies of MC2800. 7 EN MC2800 enable pin. 8 D2 2–Bit digital outputs of the MC2800. 9 D1 10 BD Out Low battery detector output. 11 Gnd Ground pin. Figure 3. The Footprint of the 11 Pin Interface Socket MOTOROLA RF/IF DEVICE DATA For More Information On This Product, Go to: www.freescale.com 5 ARCHIVE INFORMATION ARCHIVE INFORMATION Freescale Semiconductor, Inc... APPLICATION NOTES Freescale MC2800EVK Semiconductor, Inc. ARCHIVE INFORMATION ARCHIVE INFORMATION Freescale Semiconductor, Inc... Figure 4. The PCB Layout of the Receiver Board (Top Layer) 6 For More Information On This Product, MOTOROLA RF/IF DEVICE DATA Go to: www.freescale.com Freescale MC2800EVK Semiconductor, Inc. ARCHIVE INFORMATION ARCHIVE INFORMATION Freescale Semiconductor, Inc... Figure 5. The PCB Layout of the Receiver Board (Bottom Layer) MOTOROLA RF/IF DEVICE DATA For More Information On This Product, Go to: www.freescale.com 7 Freescale MC2800EVK Semiconductor, Inc. Table 1. Component List 8 Designator Part No./Value 2.0 pF L1 27 nH C2 C14 5.0 pF L2 33 nH C3 C12 7.0 pF L3 2.7 µH C4 C17 C27 C39 1.0 nF L4 3.3 µH C5 C6 C11 C32 10 nF L5 L7 39 nH C8 C16 C54 C61 100 pF L6 22 nH C9 C15 C30 C36 C46 C47 C48 C49 C51 C53 C57 C60 100 nF L8 4.7 µH C13 10 pF L9 18 nH Not Used L10 6.8 µH C19 4.0 pF C20 C26 12 pF R1 6.8 kΩ C21 1.0 pF R2 R10 820 Ω C23 22 pF R3 2.4 kΩ C25 0.5 pF R4 200 Ω C38 3.0 pF R5 750 Ω C40 C42 C55 4.7 µF R6 430 Ω C41 0.1 µF R7 110 Ω C43 2.2 nF R9 3.0 kΩ C44 22 nF R11 7.1 kΩ C45 3.3 nF R12 R13 10 MΩ C50 10 µF R14 R15 R16 R17 R18 R19 100 kΩ C52 47 pF D1 DIODE C58 56 pF U1 MC2800 C73 1.0 µF FILTER1 SAFC284E75N X1 65.681250 MHz FILTER2 Crystal Filter 21.4 MHz X2 20.945000 MHz FILTER3 CFWC455D Q1 Q2 Q3 Q4 MMBR941LT1 For More Information On This Product, MOTOROLA RF/IF DEVICE DATA Go to: www.freescale.com ARCHIVE INFORMATION Part No./Value C1 C10 C37 C18 C56 ARCHIVE INFORMATION Freescale Semiconductor, Inc... Designator Freescale MC2800EVK Semiconductor, Inc. Table 2. SAW Filter Specification Part Number SAFC284ME75N [Note] Nominal Center Frequency, fo 284.0 MHz Insertion Loss fo – 100 MHz to fo – 37.5 MHz fo ± 4.0 MHz 4.5 dB max fo + 37.5 MHz to fo + 100 MHz 40 dB min 48 dB min Ripple within fo ±4.0 MHz/dB 2.0 max 230 Ω // − 0.2 pF Nominal Input / Output impedance SAW filter SAFC284ME75N is the product of muRata Manufacturing Co., Ltd. For further enquiry, please refer to the muRata’s product catalog. Table 3. Crystal Filter Specification ARCHIVE INFORMATION ARCHIVE INFORMATION Freescale Semiconductor, Inc... NOTE: 21.400000 MHz ± 1.0 kHz Nominal Center Frequency, fo Number of Pole 2 poles Pass Band Width –3.0 dB / ±7.5 kHz min Stop Band Width –18 dB / ±25.0 kHz max Pass Band Ripple 0.5 dB max Insertion Loss 1.5 dB max Nominal Input / Output impedance 1.5 kΩ // 2.0 pF Table 4. Ceramic Filter Specification Part Number CFWC455D [Note] Nominal Center Frequency, fo 455 kHz 3.0 dB Bandwidth from fo ±8.0 kHz 50 dB Bandwidth from fo ±17.0 kHz Stop Band Attenuation Within fo ± 18 to 33 kHz 55 dB min Within fo ± 100 kHz 50 dB min Spurious within 0.1 to 1.0 MHz 20 dB min Ripple within fo ± 7.5 kHz 2.0 dB max Nominal Input/Output impedance NOTE: 1.5 kΩ Ceramic filter CFWC455D is the product of muRata Manufacturing Co., Ltd. For further inquiry, please refer to muRata’s product catalog. MOTOROLA RF/IF DEVICE DATA For More Information On This Product, Go to: www.freescale.com 9 Freescale MC2800EVK Semiconductor, Inc. Table 5. Quartz Crystal Specification (a) 65.68125 MHz Quartz Crystal [Note] 1U0656812D3035F0Z Part Number Nominal Frequency, fo 65.68125 MHz Holder Type UM–1 Resonance Mode 3rd Overtone Operating Temperature –30 to 80°C Frequency Tolerance @ 25°C 30 pF ARCHIVE INFORMATION Freescale Semiconductor, Inc... Equivalent Series Resistance, ESR 60 Ω max Shunt Capacitance C0 7.0 pF Drive Level 50 µW ±5.0 ppm/year Aging (b) 20.94500 MHz Quartz Crystal [Note] Part Number 1U0209450D30F5D0Z Nominal Frequency, fo 20.945 MHz Holder Type UM–1 Resonance Mode Fundamental Operating Temperature –30 to 80°C Frequency Tolerance @ 25°C Load Capacitance 30 pF Equivalent Series Resistance, ESR Shunt Capacitance C0 30 Ω max 7.0 pF Drive Level 0.5 mW ±5.0 ppm/year Aging NOTE: ±20 ppm The quartz crystals are the products of Hong Kong X’TALS Limited. For further inquiry, please refer to the product catalog of Hong Kong X’TALS Limited or [email protected]. Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Mfax is a trademark of Motorola, Inc. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447 JAPAN: Motorola Japan Ltd.; SPD, Strategic Planning Office, 141, 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan. 81–3–5487–8488 Customer Focus Center: 1–800–521–6274 Mfax: [email protected] – TOUCHTONE 1–602–244–6609 ASIA / PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, Motorola Fax Back System – US & Canada ONLY 1–800–774–1848 2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. – http://sps.motorola.com/mfax/ 852–26668334 HOME PAGE: http://motorola.com/sps/ 10 ◊ MC2800EVK/D For More Information On This Product, MOTOROLA RF/IF DEVICE DATA Go to: www.freescale.com ARCHIVE INFORMATION Load Capacitance ±30 ppm