Freescale Semiconductor, I. Package LQFP 24 LQFP 32 PIN CONNECTIONS. MixOut. RSSIb. DETout VCC (N/C) VEE2. IFin. IFd1. DETGain V CC (N/C) AFTFilt

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1 nc. Order this document by MC1315/D ARCHIVED BY FREESCALE The MC1315 is a narrowband FM IF subsystem targeted at cellular and other analog applications. Excellent high frequency performance is achieved, with low cost, through use of Motorola s MOSAIC 1.5 RF bipolar process. The MC1315 has an onboard Colpitts VCO for Crystal controlled second LO in dual conversion receivers. The mixer is a double balanced configuration with excellent third order intercept. It is useful to beyond MHz. The IF amplifier is split to accommodate two low cost cascaded filters. RSSI output is derived by summing the output of both IF sections. The quadrature detector is a unique design eliminating the conventional tunable quadrature coil. Applications for the MC1315 include cellular, CT1 9 MHz cordless telephone, data links and other radio systems utilizing narrowband FM modulation. Linear Coilless Detector Adjustable Demodulator Bandwidth 2.5 to 6. Vdc Operation Low Drain Current: < 2. ma Typical Sensitivity of 2. µv for 12 db SINAD IIP3, Input Third Order Intercept Point of dbm RSSI Range of Greater Than 1 db Internal 1.4 kω Terminations for 455 khz Filters Split IF for Improved Filtering and Extended RSSI Range Device MC1315FTA MC1315FTB Mixout VCC1 IFin IFd1 IFd2 IFout Mix in IF V EE1 ORDERING INFORMATION Mixer Operating Temperature Range TA = 4 to +85 C LQFP Limiter AFTFilt Package LQFP24 LQFP32 PIN CONNECTIONS RSSIb DETout VEE2 DETGain AFTout MixOut VCC1 VCC (N/C) IFin IFd1 VCC (N/C) IFd2 IFout NARROWBAND FM COILLESS DETECTOR IF SUBSYSTEM FOR CELLULAR AND ANALOG APPLICATIONS IF Mixer 1 32 SEMICONDUCTOR TECHNICAL DATA 24 1 FTA SUFFIX PLASTIC PACKAGE CASE 977 (LQFP24) FTB SUFFIX PLASTIC PACKAGE CASE 873 (LQFP32) Limiter RSSIb DETout VEE (N/C) VEE2 DETGain VEE (N/C) AFTFilt AFTout V CC2 LIM in LIM d1 LIM d2 BW Adj F Adj LO e V CC2 LIM in V CC (N/C) LO b Enable RSSI Mix in V EE1 V CC (N/C) LO e LO b V CC (N/C) Enable RSSI LIM d1 LIM d2 V CC (N/C) BW Adj F Adj Detector LQFP Detector Motorola, Inc Rev 2 MOTOROLA ANALOG IC DEVICE DATA 1

2 MAXIMUM RATINGS Rating Pin Symbol Value Unit ARCHIVED Power Supply BY Voltage FREESCALE ÁÁÁ 2, SEMICONDUCTOR, 9 ÁÁÁÁÁ VCC(max) ÁÁÁÁÁ 6.5 ÁÁÁÁ Vdc Junction Temperature ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ INC. 5 TJmax +15 ÁÁÁÁ C Storage Temperature Range ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Tstg 65 to +15ÁÁÁÁ C NOTE: 1. Devices should not be operated at or outside these values. The Recommended Operating Limits provide for actual device operation. 2. ESD data available upon request. RECOMMENDED OPERATING CONDITIONS Rating Pin Symbol Value Unit ÁÁÁÁÁÁÁÁÁ Power Supply Voltage TA = 25 C 2, 9 VCC 2.5 to 6. Vdc ÁÁÁ 4 C TA 85 CÁÁÁÁ 21, 31 ÁÁÁÁÁÁ VEE ÁÁÁÁÁÁ ÁÁÁÁ (See Figure 22) ÁÁÁÁÁÁÁÁÁ Input Frequency 32 Á fin 1 to 5 MHz ÁÁÁÁÁÁÁÁÁ Ambient Temperature Range Á TA 4 to +85 C ÁÁÁÁÁÁÁÁÁ Input Signal Level 32 Á Vin dbm ÁÁÁÁÁÁÁÁÁ DC ELECTRICAL CHARACTERISTICS (TA = 25 C, VCC1 = VCC2 = 3. Vdc, No Input Signal.) Characteristics Condition Pin Symbol Min Typ Max Unit Total Drain Current ÁÁÁÁÁ VS = 3. VdcÁÁÁÁ ÁÁÁÁÁÁ ITOTAL ÁÁÁÁ ÁÁÁÁ 1.7 ÁÁÁÁ 3. ÁÁÁÁ ma (See Figure 2) ÁÁÁÁ Supply Current, Power Down ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4 ÁÁÁÁ ÁÁÁÁ na (See Figure 3) AC ELECTRICAL CHARACTERISTICS (TA = 25 C, VS = 3. Vdc, frf = 5 MHz, flo = MHz, LO Level = 1 dbm, see Figure 1 Test Circuit*, unless otherwise specified.) Characteristics Condition Pin Symbol Min Typ Max Unit ÁÁÁÁÁÁÁ 12 db SINAD Sensitivity fmod = 1. khz; 32 (See Figure 15) ÁÁÁÁÁÁÁÁ fdev = ±5. khz ÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ 1ÁÁÁÁ ÁÁÁ dbm ÁÁÁÁÁÁ RSSI Dynamic Range ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ 25 ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁ (See Figure 7) ÁÁÁÁÁÁÁÁ ÁÁÁ 1 ÁÁÁ ÁÁÁÁÁÁ db Input 1. db Compression Point ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 1. db C. Pt. ÁÁÁ ÁÁÁ 11ÁÁÁÁ ÁÁÁ dbm Input 3rd Order Intercept Point IIP3 1. (See Figure 18) ÁÁÁÁÁ Coilless Detector Bandwidth ÁÁÁÁÁÁÁÁ Measured with No IF FiltersÁÁÁÁÁ ÁÁÁÁÁ BW adj ÁÁÁ ÁÁÁÁÁÁ Adjust (See Figure 11) ÁÁÁÁÁÁÁÁ ÁÁÁ 26 ÁÁÁ khz/µa ÁÁÁÁÁÁ MIXER Conversion Voltage Gain (See Figure 5) ÁÁÁÁÁÁÁ Pin = 3 dbm; ÁÁÁÁÁ 32 ÁÁÁÁÁ ÁÁÁ ÁÁÁ 1 ÁÁÁÁ ÁÁÁ db PLO = 1 dbm ÁÁÁÁÁÁÁ Mixer Input Impedance SingleEnded 32 ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ Ω Mixer Output Impedance 1 ÁÁÁ 1.5 ÁÁÁÁÁÁ kω LOCAL OSCILLATOR ÁÁÁÁÁÁÁ LO Emitter Current 29 (See Figure 26) ÁÁÁÁÁÁÁÁ ÁÁÁ 3 ÁÁÁ 63ÁÁÁÁ 1 ÁÁÁÁ ÁÁÁ ÁÁÁ µa IF & LIMITING AMPLIFIERS SECTION IF and Limiter RSSI Slope IF Gain IF Input & Output Impedance Limiter Input Impedance Limiter Gain * Figure 1 Test Circuit uses positive (V CC ) Ground. ÁÁÁÁÁÁÁÁ Figure 7 ÁÁÁÁÁ 25 ÁÁÁÁÁ ÁÁÁ ÁÁÁ.4ÁÁÁÁ ÁÁÁ µa/db ÁÁÁÁÁÁÁÁ Figure 8 ÁÁÁÁÁ 4, 8 ÁÁÁÁÁ ÁÁÁ ÁÁÁ 42ÁÁÁÁ ÁÁÁ db ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ 4, 8 ÁÁÁÁÁ ÁÁÁ ÁÁÁ 1.5ÁÁÁÁ ÁÁÁ kω ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ 1 ÁÁÁÁÁ ÁÁÁ ÁÁÁ 1.5ÁÁÁÁ ÁÁÁ kω ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ 96ÁÁÁÁ ÁÁÁ db 2 MOTOROLA ANALOG IC DEVICE DATA

3 AC ELECTRICAL CHARACTERISTICS (continued) (TA = 25 C, VS = 3. Vdc, frf = 5 MHz, flo = MHz, LO Level = 1 dbm, see Figure 1 Test Circuit*, unless otherwise specified.) ARCHIVED Characteristics BY FREESCALE SEMICONDUCTOR, Condition INC. Pin5 Symbol Min Typ DETECTOR Frequency Adjust Current Figure 9, fif = 455 khz Max Unit µa Frequency Adjust Voltage Figure 1, fif = 455 khz Bandwidth Adjust Voltage Figure 12, I15 = 1. µa mvdc mvdc Detector DC Output Voltage (See Figure 25) Vdc Recovered Audio Voltage fdev = ±3. khz mvrms * Figure 1 Test Circuit uses positive (V CC ) Ground. ARCHIVED BY FREESCALE INFORMATION Mixer In IF In 49.9 IF Amp Out Mixer Out 2 n 2 n 1 µ 2 n + 1:4 Z Xformer 1.5 k 2 n 2 n 2 n 2 n VCC1 IF Figure 1. Test Circuit VEE1 LO Input VEE1 Mixer VCC2 Local Oscillator Limiter RSSI Buffer (6) Detector VEE p 1 k RSSI Buffer RS 1 k RL 1 k Enable RSSI Detector Output VEE2 2 n 1 µ + V18V17 = ; fif = 455 khz 1.5 k Limiter In 2 n 2 n 2 n I15 2 n I This device contains 292 active transistors. MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 3

4 Mixer The mixer is a doublebalanced four quadrant multiplier and is designed to work up to 5 MHz. It has a single ended input. Figure 5 shows the mixer gain and saturated output response as a function of input signal drive and for 1 dbm LO drive level. This is measured in the application circuit shown in Figure 15 in which a single LC matching network is used. Since the singleended input impedance of the mixer is Ω, an alternate solution uses a 1:4 impedance transformer to match the mixer to 5 Ω input impedance. The linear voltage gain of the mixer alone is approximately 4. db (plus an additional 6. db for the transformer). Figure 6 shows the mixer gain versus the LO input level for various mixer input levels at 5 MHz RF input. MC1315 CIRCUIT DESCRIPTION General The buffered output of the mixer is internally loaded, ARCHIVED The MC1315 BY is FREESCALE a very low power SEMICONDUCTOR, single conversion INC. resulting 5in an output impedance of 1.5 kω. narrowband FM receiver incorporating a split IF. This device Local Oscillator is designated for use as the backend in analog narrowband The onchip transistor operates with crystal and LC FM systems such as cellular, 9 MHz cordless phones and resonant elements up to 2 MHz. Series resonant, overtone narrowband data links with data rates up to 9.6 k baud. It crystals are used to achieve excellent local oscillator stability. contains a mixer, oscillator, extended range received signal 3rd overtone crystals are used through about 65 to 7 MHz. strength indicator (RSSI), RSSI buffer, IF amplifier, limiting IF, Operation from 7 MHz up to MHz is feasible using the a unique coilless quadrature detector and a device enable onchip transistor with a 5th or 7th overtone crystal. To function (see Package Pin Outs/Block Diagram). enhance operation using an overtone crystal, the internal Low Current Operation transistor s bias is increased by adding an external resistor The MC1315 is designed for battery and portable from Pin 29 (in 32 pin QFP package) to VEE to keep the applications. Supply current is typically 1.7 madc at 3. Vdc. oscillator on continuously or it may be taken to the enable pin Figure 2 shows the supply current versus supply voltage. to shut it off when the receiver is disabled. 1 dbm of local oscillator drive is needed to adequately drive the mixer Enable (Figure 6). The oscillator configurations specified above are The enable function is provided for battery powered described in the application section. operation. The enabled pin is pulled down to enable the regulators. Figure 3 shows the supply current versus enable RSSI voltage, Venable (relative to VCC) needed to enable the The received signal strength indicator (RSSI) output is a device. Note that the device is fully enabled at VCC 1.3 Vdc. current proportional to the log of the received signal Figure 4 shows the relationship of enable current, Ienable to amplitude. The RSSI current output is derived by summing enable voltage, Venable. the currents from the IF and limiting amplifier stages. An external resistor at Pin 25 (in 32 pin QFP package) sets the voltage range or swing of the RSSI output voltage. Linearity of the RSSI is optimized by using external ceramic bandpass filters which have an insertion loss of 4. db. The RSSI circuit is designed to provide 1+ db of dynamic range with temperature compensation (see Figures 7 and 23 which show the RSSI response of the applications circuit). RSSI Buffer The RSSI buffer has limitations in what loads it can drive. It can pull loads well towards the positive and negative supplies, but has problems pulling the load away from the supplies. The load should be biased at half supply to overcome this limitation. 4 MOTOROLA ANALOG IC DEVICE DATA

5 Figure 2. Supply Current versus Supply Voltage ARCHIVED 2. BY FREESCALE 12 ISUPPLY, SUPPLY CURRENT (ma) VENABLE, SUPPLY VOLTAGE (Vdc) TA = 25 C ISUPPLY, SUPPLY CURRENT (A) VCC = 3. Vdc TA = 25 C VENABLE Measured Relative to VCC Figure 3. Supply Current versus Enable Voltage VENABLE, ENABLE VOLTAGE (Vdc) IENABLE, ENABLE CURRENT ( µ A ) MIXER IF OUTPUT LEVEL (dbm) Figure 4. Enable Current versus Enable Voltage VENABLE, ENABLE VOLTAGE (Vdc) Figure 6. Mixer IF Output Level versus Local Oscillator Input Level VEE = 3. Vdc TA = 25 C LO DRIVE (dbm) VCC = 3. Vdc TA = 25 C RF In = dbm dbm 4 dbm frf = 5 MHz; flo = MHz Rin = 5 Ω; Rout = 1.4 kω MIXER IF OUTPUT LEVEL (dbm) RSSI OUTPUT CURRENT ( µ A) 1 1 Figure 5. Mixer IF Output Level versus RF Input Level VEE = 3. Vdc TA = 25 C 3 frf = 5 MHz; flo = MHz LO Input Level = 1 dbm 4 (1 mvrms) (Rin = 5 Ω; Rout = 1.4 kω RF INPUT LEVEL (dbm) VCC = 3. Vdc f = 5 MHz flo = MHz 455 khz Ceramic Filter See Figure 15 Figure 7. RSSI Output Current versus Input Signal Level SIGNAL INPUT LEVEL (dbm) MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 5

6 IF Amplifier Overall RSSI linearity is dependent on having total The first IF amplifier section is composed of three midband attenuation of 1 db (4. db insertion loss plus 6. ARCHIVED differential stages. BY This FREESCALE section has internal SEMICONDUCTOR, dc feedback and INC. db 5 impedance matching loss) for the filter. The output of the external input decoupling for improved symmetry and IF amplifier is buffered and the impedance is 1.5 kω. stability. The total gain of the IF amplifier block is Limiter approximately 42 db at 455 khz. Figure 8 shows the gain of The limiter section is similar to the IF amplifier section the IF amplifier as a function of the IF frequency. except that six stages are used. The fixed internal input The fixed internal input impedance is 1.5 kω; it is designed impedance is 1.5 kω. The total gain of the limiting amplifier for applications where a 455 khz ceramic filter is used and no section is approximately 96 db. This IF limiting amplifier external output matching is necessary since the filter requires section internally drives the quadrature detector section. a 1.5 kω source and load impedance. Fadj VOLTAGE (mvdc) IF AMP GAIN (db) Figure 8. IF Amplifier Gain versus IF Frequency f, FREQUENCY (MHz) Vin = 1 µv Rin = 5 Ω Rout = 1.4 kω BW (3. db) = 2.4 MHz TA = 25 C Figure 1. Fadj Voltage versus Fadj Current VCC = 3. Vdc TA = 25 C Fadj CURRENT (µ A ) BW adj CURRENT A) ( µ Figure 9. Fadj Current versus IF Frequency VCC = 3. Vdc Slope at 455 khz = 9.26 khz/µa f, IF FREQUENCY (khz) Figure 11. BWadj Current versus IF Frequency VCC = 3. Vdc BW 26 khz/µa Fadj CURRENT (µa) f, IF FREQUENCY (khz) 6 MOTOROLA ANALOG IC DEVICE DATA

7 Coilless Detector voltage across the bandwidth resistor, RB from Figure 12 is The quadrature detector is similar to a PLL. There is an VCC 2.44 Vdc =.56 Vdc for VCC = 3. Vdc, so ARCHIVED internal oscillator BY FREESCALE running at the IF SEMICONDUCTOR, frequency and two INC. RB 5 =.56V/1. µa = 56 kω. Actually the locking range will detector outputs. One is used to deliver the audio signal and be ±13 khz while the audio bandwidth will be approximately the other one is filtered and used to tune the oscillator. ±8.4 khz due to an internal filter capacitor. This is verified in The oscillator frequency is set by an external resistor at Figure 13. For some applications it may be desirable that the the Fadj pin. Figure 9 shows the control current required for a audio bandwidth is increased; this is done by reducing RB. particular frequency; Figure 1 shows the pin voltage at that Reducing RB widens the detector bandwidth and improves current. From this the value of RF is chosen. For example, the distortion at high input levels at the expense of 12 db 455 khz would require a current of around 5 µa. The pin SINAD sensitivity. The low frequency 3.dB point is set by the voltage (Pin 16 in the 32 pin QFP package) is around 655mV tuning circuit such that the product giving a resistor of 13.1 kω. Choosing 12 kω as the nearest standard value gives a current of approximately 55 µa. The RTCT =.68/f3dB. 5. µa difference can be taken up by the tuning resistor, RT. So, for example, 15 k and 1. µf give a 3. db point of The best nominal frequency for the AFTout pin (Pin 17) 4.5 Hz. The recovered audio is set by RL to give roughly would be half supply. A supply voltage of 3. Vdc suggests a 5mV per khz deviation per 1 k of resistance. The dc level resistor value of ( )V/5. µa = 169 kω. Choosing can be shifted by RS from the nominal.68 V by the following 15 kω would give a tuning current of 3/15 k = µa. From equation: Figure 9 this would give a tuning range of roughly 1 khz/µa Detector DC Output = or ± 1 khz which should be adequate. ((RL + RS)/RS).68 Vdc The bandwidth can be adjusted with the help of Figure 11. Thus, RS = RL sets the output at 2 x.68 = 1.36 V; For example, 1. µa would give a bandwidth of ± 13 khz. The RL = 2RS sets the output at 3 x.68 = 2. V. BWadj CURRENT (A) VCC = 3. Vdc TA = 25 C Figure 12. BWadj Current versus BWadj Voltage BWadj VOLTAGE (Vdc) DEMODULATOR OUTPUT (db) Figure 13. Demodulator Output versus Frequency VCC = 3. Vdc TA = 25 C frf = 5 MHz flo = MHz LO Level = 1 dbm No IF Bandpass Filters fdev = ±4. khz RB = 1. M RB = 56 k f, FREQUENCY (khz) MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 7

8 APPLICATIONS INFORMATION Evaluation PC Board shown in Figures 27 and 28 for the application circuit in ARCHIVED The evaluation BY PCB FREESCALE is very versatile SEMICONDUCTOR, and is intended to be INC. Figure 5 15 and for the MHz crystal oscillator circuit in used across the entire useful frequency range of this device. Figure 16. The center section of the board provides an area for Input Matching Components attaching all SMT components to the circuit side and radial The input matching circuit shown in the application circuit leaded components to the component ground side (see schematic (Figure 15) is a series L, shunt C single L section Figures 29 and 3). Additionally, the peripheral area which is used to match the mixer input to 5 Ω. An surrounding the RF core provides pads to add supporting alternative input network may use 1:4 surface mount and interface circuitry as a particular application dictates. transformers or BALUNs. The 12 db SINAD sensitivity There is an area dedicated for a LNA preamp. This using the 1:4 impedance transformer is typically 1 dbm evaluation board will be discussed and referenced in this for section. fmod = 1. khz and fdev = ±5. khz at fin = 5 MHz and flo = MHz (see Figure 14). Component Selection It is desirable to use a SAW filter before the mixer to The evaluation PC board is designed to accommodate provide additional selectivity and adjacent channel rejection specific components, while also being versatile enough to and improved sensitivity. SAW filters sourced from Toko use components from various manufacturers and coil types. (Part # SWS83GBWA) and Murata (Part # SAF83.16MA51X) The applications circuit schematic (Figure 15) specifies are excellent choices to easily interface with the MC1315 particular components that were used to achieve the results mixer. They are packaged in a 12 pin low profile surface shown in the typical curves but equivalent components mount ceramic package. The center frequency is MHz should give similar results. Component placement views are and the 3. db bandwidth is 3 khz. S+N+D, N+D, N, 3% AMR (db) Figure 14. S+N+D, N+D, N, 3% AMR versus Input Signal Level VCC = 3. Vdc fmod = 1. khz fdev = ±5. khz fin = 5 MHz flo = MHz LO Level = 1 dbm See Figure 15 S+N+D N+D 3% AMR INPUT SIGNAL (dbm) N 8 MOTOROLA ANALOG IC DEVICE DATA

9 Figure 15. Application Circuit ARCHIVED BY FREESCALE (3) LO Input RF/IF Input (1) 18 nh 11 p 51 (4) Enable (5) RSSI k ARCHIVED BY FREESCALE INFORMATION (2) 455 khz IF Ceramic Filter 1. n 1. n 455 khz IF Ceramic Filter VCC1 Mixer IF VCC µ + VEE1 Local Oscillator NOTES: 1. Alternate solution is 1:4 impedance transformer (sources include Mini Circuits, Coilcraft and Toko) khz ceramic filters (source Murata CFU455 series which are selected for various bandwidths). 3. For external LO source, a 51 Ω pullup resistor is used to bias the base of the onboard transistor as shown in Figure 15. Designer may provide local oscillator with 3rd, 5th, or 7th overtone crystal oscillator circuit. The PC board is laid out to accommodate external components needed for a Butler emitter coupled crystal oscillator (see Figure 16). 4. Enable IC by switching the pin to V EE. 5. The resistor is chosen to set the range of RSSI voltage output swing. 6. Details regarding the external components to setup the coilless detector are provided in the application section. Limiter VCC RSSI Buffer 56 k RB (6) Detector VEE k RT 12 k RF 1. n 1. µ CT RSSI Buffer RS 15 k RL 15 k (6) Coilless Detector Circuit Detector Output MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 9

10 Local Oscillators A series LC network to ac ground (which is VCC) is comprised of the inductance of the base lead of the onchip HF & VHF Applications ARCHIVED BY FREESCALE SEMICONDUCTOR, INC. transistor 5 and PC board traces and tap capacitors. Parasitic In the application schematic, an external sourced local oscillations often occur in the to 8 MHz range. A small oscillator is utilized in which the base is biased via a 51 Ω resistor is placed in series with the base (Pin 28) to cancel the resistor to VCC. However, the onchip grounded collector negative resistance associated with this undesired mode of transistor may be used for HF and VHF local oscillators with oscillation. Since the base input impedance is so large, a higher order overtone crystals. Figure 16 shows a 5th small resistor in the range of 27 to 68 Ω has very little effect overtone oscillator at MHz. The circuit uses a Butler on the desired Butler mode of oscillation. overtone oscillator configuration. The amplifier is an emitter The crystal parallel capacitance, Co, provides a feedback follower. The crystal is driven from the emitter and is coupled path that is low enough in reactance at frequencies of 5th to the high impedance base through a capacitive tap overtones or higher to cause trouble. Co has little effect near network. Operation at the desired overtone frequency is resonance because of the low impedance of the crystal ensured by the parallel resonant circuit formed by the motional arm (RmLmCm). As the tunable inductor, which variable inductor and the tap capacitors and parasitic forms the resonant tank with the tap capacitors, is tuned off capacitances of the onchip transistor and PC board. The the crystal resonant frequency, it may be difficult to tell if the variable inductor specified in the schematic could be oscillation is under crystal control. Frequency jumps may replaced with a high tolerance, high Q ceramic or air wound occur as the inductor is tuned. In order to eliminate this surface mount component if the other components have tight behavior an inductor, Lo, is placed in parallel with the crystal. enough tolerances. A variable inductor provides an Lo is chosen to resonant with the crystal parallel capacitance, adjustment for gain and frequency of the resonant tank Co, at the desired operation frequency. The inductor provides ensuring lock up and startup of the crystal oscillator. The a feedback path at frequencies well below resonance; overtone crystal is chosen with ESR of typically 8 Ω and however, the parallel tank network of the tap capacitors and 1 Ω maximum; if the resistive loss in the crystal is too high tunable inductor prevent oscillation at these frequencies. the performance of oscillator may be impacted by lower gain margins. Figure 16. MC1315FTB Overtone Oscillator frf = MHz; flo = MHz 5th Overtone Crystal Oscillator MC1315 Mixer VEE k µh (3) 5th OT XTAL 39 p (4).135 µh 39 p 1 n + 1. µ VCC 1 MOTOROLA ANALOG IC DEVICE DATA

11 Receiver Design Considerations application circuit (Figure 15), the input 1. db compression The curves of signal levels at various portions of the point is 1 dbm and the input third order intercept (IP3) ARCHIVED application receiver BY FREESCALE with respect to RF SEMICONDUCTOR, input level are shown INC. performance 5 of the system is approximately dbm (see in Figure 17. This information helps determine the network Figure 18). topology and gain blocks required ahead of the MC1315 to Typical Performance Over Temperature achieve the desired sensitivity and dynamic range of the Figures 1926 show the device performance over receiver system. The PCB is laid out to accommodate a low temperature. noise preamp followed by the MHz SAW filter. In the 1 Figure 17. Signal Levels versus RF Input Signal Level ARCHIVED BY FREESCALE INFORMATION POWER (dbm) IF Output Mixer Output Limiter Input IF Input frf = 5 MHz flo = MHz; LO Level = 1 dbm See Figure 15 RF INPUT SIGNAL LEVEL (dbm) Mixer Input RF Input at Transformer Input 3 1 MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 11

12 Figure db Compression Point and Input ARCHIVED BY FREESCALE SEMICONDUCTOR, Third Order Intercept INC. Point 5 versus Input Power MIXER IF OUTPUT LEVEL (dbm) 4 VCC = 3. Vdc frf1 = 5 MHz frf2 = 5.1 MHz flo = MHz PLO = 1 dbm See Figure db Compression Point = 11 dbm IP3 =.5 dbm IVEE1, SUPPLY CURRENT (ma) Figure 19. Supply Current, IVEE1 versus Signal Input Level VCC = 3. Vdc 4. fc = 5 MHz fdev = ±4. khz TA = 85 C TA = 25 C TA = 4 C SIGNAL INPUT LEVEL (dbm) RF INPUT POWER (dbm) TYPICAL PERFORMANCE OVER TEMPERATURE IVEE2, SUPPLY CURRENT (ma) Figure. Supply Current, IVEE2 versus Ambient Temperature VCC = 3. Vdc TA, AMBIENT TEMPERATURE ( C) 12 MOTOROLA ANALOG IC DEVICE DATA

13 TYPICAL PERFORMANCE OVER TEMPERATURE ARCHIVED BY Figure FREESCALE 21. Total Supply SEMICONDUCTOR, Current INC. 5 versus Ambient Temperature TOTAL SUPPLY CURRENT (ma) RSSI CURRENT ( µ A) DEMOD DC OUTPUT VOLTAGE (Vdc) VCC = 3. Vdc TA, AMBIENT TEMPERATURE ( C) Figure 23. RSSI Current versus Ambient Temperature and Signal Level Figure 25. Demod DC Output Voltage versus Ambient Temperature TA, AMBIENT TEMPERATURE ( C) Figure 22. Minimum Supply Voltage versus Ambient Temperature TA, AMBIENT TEMPERATURE ( C) Figure 24. Recovered Audio versus Ambient Temperature.7 VCC = 3. Vdc frf = 5 MHz Vin =.65 dbm.6 dbm 4 dbm.55 6 dbm.5 VCC = 3. Vdc RF In = 5 dbm 8 dbm fc = 5 MHz 1 dbm.45 flo = MHz 1 dbm fdev = ±4. khz TA, AMBIENT TEMPERATURE ( C) TA, AMBIENT TEMPERATURE ( C) VCC = 3. Vdc RF In = 5 dbm fc = 5 MHz flo = MHz fdev = ±4. khz MINIMUM SUPPLY VOLTAGE (Vdc) RECOVERED AUDIO (Vpp ) LO CURRENT ( µ A) Figure 26. LO Current versus Ambient Temperature VCC = 3. Vdc RF In = 5 dbm fc = 5 MHz flo = MHz fdev = ±4. khz TA, AMBIENT TEMPERATURE ( C) MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 13

14 Figure 27. Component Placement View Circuit Side ARCHIVED BY FREESCALE ARCHIVED BY FREESCALE INFORMATION 1 n 1 n 5 Ω SemiRigid Coax 18 n 11 p 27 k MC1315FTB 1 n 56 k 1 n 33 1 n 15 k 82 k 15 k 15 k 12 k 1 µ 39 p 39 p 1 n + 1 µ GND VCC 14 MOTOROLA ANALOG IC DEVICE DATA

15 Figure 28. Component Placement View Ground Side ARCHIVED BY FREESCALE VCC GND BW_adj F_adj DET_out RF1 IN 455 khz Ceramic Filter 455 khz Ceramic Filter 455 khz Ceramic Filter 455 khz Ceramic Filter µh MHz SMA AFT_adj 135 nh RF2 IN Xtal LO Tuning RSSI ENABLE LO IN MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 15

16 Figure 29. PCB Circuit Side View ARCHIVED BY FREESCALE GND VCC MC1315 Rev 3/ MOTOROLA ANALOG IC DEVICE DATA

17 Figure 3. PCB Ground Side View ARCHIVED BY FREESCALE VCC GND BW_adj F_adj DET_out RF1 IN 455 khz Ceramic Filter 455 khz Ceramic Filter 3.8 AFT_adj RF2 IN Xtal LO Tuning RSSI ENABLE LO IN MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 17

18 V 9 T V1 AB 1 6 4X 4X. (.8) AB TU Z S1 A A S. (.8) AB TU Z R Z OUTLINE DIMENSIONS ARCHIVED BY FREESCALE C E M TOP & BOTTOM FTA SUFFIX PLASTIC PACKAGE CASE 9771 (LQFP24) ISSUE O DETAIL Y U B1.8 (.3) AC T, U, Z B DETAIL AD AE AC AE NOTES: 1 DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, CONTROLLING DIMENSION: MILLIMETER. 3 DATUM PLANE AB IS LOCATED AT BOTTOM OF LEAD AND IS COINCIDENT WITH THE LEAD WHERE THE LEAD EXITS THE PLASTIC BODY AT THE BOTTOM OF THE PARTING LINE. 4 DATUMS T, U, AND Z TO BE DETERMINED AT DATUM PLANE AB. 5 DIMENSIONS S AND V TO BE DETERMINED AT DATUM PLANE AC. 6 DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS.25 (.1) PER SIDE. DIMENSIONS A AND B DO INCLUDE MOLD MISMATCH AND ARE DETERMINED AT DATUM PLANE AB. 7 DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. DAMBAR PROTRUSION SHALL NOT CAUSE THE D DIMENSION TO EXCEED.35 (.14). 8 MINIMUM SOLDER PLATE THICKNESS SHALL BE.76 (.3). 9 EXACT SHAPE OF EACH CORNER IS OPTIONAL. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 4. BSC.157 BSC A1 2. BSC.79 BSC B 4. BSC.157 BSC B1 2. BSC.79 BSC C D E F G.5 BSC. BSC H J K M 12 REF 12 REF N P.25 BSC.1 BSC Q R S 6. BSC.236 BSC S1 3. BSC.118 BSC V 6. BSC.236 BSC V1 3. BSC.118 BSC W. REF.8 REF X 1. REF.39 REF J ÉÉÉ ÇÇÇ ÉÉÉ ÇÇÇ F D N H W DETAIL AD X K Q GAUGE PLANE.25 (.1) P G DETAIL Y.8 (.3) S AC TU S Z S SECTION AEAE 18 MOTOROLA ANALOG IC DEVICE DATA

19 OUTLINE DIMENSIONS ARCHIVED BY FREESCALE L FTB SUFFIX PLASTIC PACKAGE CASE 8731 (LQFP32) ISSUE A B B P L -H- DATUM PLANE 32 1 DETAIL A 8 -D- A. (.8) M C AB S D S.5 (.2) AB S. (.8) M H AB S D S E H G U T R K Q X DETAIL C -C- SEATING PLANE C -B- -A- 9 -A-,-B-,-D- M B. (.8) M C AB S D S.5 (.2) AB M -H- DATUM PLANE BASE METAL NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, CONTROLLING DIMENSION: MILLIMETER. 3. DATUM PLANE -H- IS LOCATED AT BOTTOM OF LEAD AND IS COINCIDENT WITH THE LEAD WHERE THE LEAD EXITS THE PLASTIC BODY AT THE BOTTOM OF THE PARTING LINE. 4. DATUMS -A-, -B- AND -D- TO BE DETERMINED AT DATUM PLANE -H-. 5. DIMENSIONS S AND V TO BE DETERMINED AT SEATING PLANE -C-. 6. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS.25 (.1) PER SIDE. DIMENSIONS A AND B DO INCLUDE MOLD MISMATCH AND ARE DETERMINED AT DATUM PLANE -H-. 7. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE.8 (.3) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. V. (.8) M H AB S D S DETAIL C.1 (.4) DETAIL A J DIM A B C D E F G H J K L M N P Q R S T U V X MILLIMETERS MIN MAX F D SECTION B-B.8 BSC REF BSC INCHES MAX BSC MIN N. (.8) M C AB S D S VIEW ROTATED 9 CLOCKWISE REF BSC REF.39 REF MOTOROLA ANALOG IC DEVICE For DATA More Information On This Product, 19

20 ARCHIVED BY FREESCALE 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; JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4321, P.O. Box 545, Denver, Colorado or NishiGotanda, Shinagawaku, Tokyo 141, Japan Customer Focus Center: Mfax : RMFAX@ .sps.mot.com TOUCHTONE ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, Motorola Fax Back System US & Canada ONLY Ting Kok Road, Tai Po, N.T., Hong Kong HOME PAGE: MOTOROLA ANALOG IC DEVICE MC1315/D DATA