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Dear customer
st
LAPIS Semiconductor Co., Ltd. ("LAPIS Semiconductor"), on the 1
day of October,
2020, implemented the incorporation-type company split (shinsetsu-bunkatsu) in which
LAPIS established a new company, LAPIS Technology Co., Ltd. ("LAPIS
Technology") and LAPIS Technology succeeded LAPIS Semiconductor's LSI business.
Therefore, all references to "LAPIS Semiconductor Co., Ltd.", "LAPIS Semiconductor"
and/or "LAPIS" in this document shall be replaced with "LAPIS Technology Co., Ltd."
Furthermore, there are no changes to the documents relating to our products other than
the company name, the company trademark, logo, etc.
Thank you for your understanding.
LAPIS Technology Co., Ltd.
October 1, 2020
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Related Manuals for Rohm LAPIS Semiconductor ML7404 Series
Summary of Contents for Rohm LAPIS Semiconductor ML7404 Series
- Page 1 Dear customer LAPIS Semiconductor Co., Ltd. ("LAPIS Semiconductor"), on the 1 day of October, 2020, implemented the incorporation-type company split (shinsetsu-bunkatsu) in which LAPIS established a new company, LAPIS Technology Co., Ltd. (“LAPIS Technology”) and LAPIS Technology succeeded LAPIS Semiconductor’s LSI business. Therefore, all references to "LAPIS Semiconductor Co., Ltd.", "LAPIS Semiconductor"...
- Page 2 FEXL7404DG-03 ML7404 Family LSIs Hardware Design Manual Issue Date: Oct, 5 , 2018...
- Page 3 11) Please use the Products in accordance with any applicable environmental laws and regulations, such as the RoHS Directive. For more details, including RoHS compatibility, please contact a ROHM sales office. LAPIS Semiconductor shall have no responsibility for any damages or losses resulting non-compliance with any applicable laws or regulations.
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Page 4: Introduction
ML7404 Family LSIs Hardware Design Manual Introduction This hardware design manual contains hardware information that should be referenced when designing ML7404 family devices (Hereafter ML7404). And also contains the measurement conditions and example of measurement results of RF characteristics. Target product： ML7404 The following related manual is available and should be referenced as needed ... -
Page 5: Notation
ML7404 Family LSIs Hardware Design Manual Notation Classification Notation Description Numeric value 0xnn Represents a hexadecimal number. 0bnnnn Represents a binary number. Address 0xnnnn_nnnn Represents a hexadecimal number. (indicates 0xnnnnnnnn) Unit word, W 1 word = 32 bits byte, B 1 byte = 8 bits Mega, M... -
Page 6: Table Of Contents
ML7404 Family LSIs Hardware Design Manual Table of Contents INTRODUCTION .............................II NOTATION ..............................III TABLE OF CONTENTS ..........................IV PLACING DECOUPLING CAPACITORS ....................1 CLOCK INPUT ............................3 2.1......................3 RYSTAL SCILLATOR CIRCUIT 2.1.1. Circuit component values for crystal oscillator circuit ..............3 2.1.2. -
Page 7: Placing Decoupling Capacitors
ML7404 Family LSIs Hardware Design Manual 1. Placing decoupling capacitors Place decoupling capacitors between each power pins and GND as shown in Figure 1.1. PA_OUT(#20) L3*[1] REG_PA(#21) 1000pF VDD_PA(#22) PA regulator 0.01uF 1µF VDDIO(#9) 0.1µF VDD_REG(#1) 1.5V regulator 0.1µF REG_CORE(#4) Logic circuit 1μF REG_OUT(#3) - Page 8 ML7404 Family LSIs Hardware Design Manual Notes the following when placing decoupling capacitors: 1. The VDD and GND traces should be wider than other signal line traces to reduce the resister element. 2. Decoupling capacitor should be placed as close to an LSI pin as possible. 3.
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Page 9: Clock Input
ML7404 Family LSIs Hardware Design Manual 2. Clock Input 2.1. Crystal Oscillator circuit Figure 2.1 shows a configuration example of the crystal oscillator circuit. Capacitors should be connected to XIN (#5) and XOUT (#6) pins to stabilize 36MHz crystal oscillator circuit. To determine the component values, the oscillator circuit evaluation on your designing board is required, since the stray capacitor of the board will be influenced. -
Page 10: Notes On The Crystal Oscillator Circuit Configuration
ML7404 Family LSIs Hardware Design Manual 2.1.2. Notes on the crystal oscillator circuit configuration Note the following when designing the crystal oscillator circuit. The capacitors value of C4 and C5 depends on the crystal oscillator specification. C1 and C2 should be placed as close as possible to the XIN (#5) and the XOUT (#6) pins to suppress parasitic LCR and stabilize the oscillator. -
Page 11: Tcxo Circuit (Ml7404)
ML7404 Family LSIs Hardware Design Manual 2.2. TCXO circuit (ML7404) Please use a TCXO that satisfy the following specification. Output load: 10kΩ//10pF Output level: 0.8Vpp to 1.5Vpp Frequency accuracy: below ±10ppm The ML7404 has integrated bias circuit and the DC bias is applied to the TCXO (#6) pin. A 0.1uF capacitor should be placed on the TCXO line as following. - Page 12 ML7404 Family LSIs Hardware Design Manual ●Example of an adjustment flow for initial frequency tolerance The example of an adjustment flow in the case of measuring the frequency of a transmitted signal and compensating initial frequency tolerance is shown below. In addition, for details, refer to the “LSI Adjustment items and Adjustment method”...
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Page 13: Pll Loop Filter
ML7404 Family LSIs Hardware Design Manual 3. PLL loop filter Figure 3.1 shows a configuration example of the PLL loop filter circuit . C3 and R3 values depend on the data rate to satisfy phase noise feature. The recommend values are listed in Table 3.1. It is recommended to select the components with flat temperature characteristics and temperature coefficient is managed. -
Page 14: Vco
ML7404 Family LSIs Hardware Design Manual 4. VCO Figure 4.1 shows a configuration example of the VCO tank circuit. VCO oscillator frequency calculated as follows: π 2 The L in the above equation will be the sum of the inductor L1, the line inductance of the PCB and the internal inductance of the ML7404. -
Page 15: Adjusting Component Values For Vco Tank
ML7404 Family LSIs Hardware Design Manual 4.1. Adjusting component values for VCO tank Adjustment procedure of the VCO tank componentｓ is as below: Execute the VCO calibration with the following condition. Set the frequency to the center of usingfrequency range. ... -
Page 16: Note On The Vco Tank Circuit
ML7404 Family LSIs Hardware Design Manual 4.2. Note on the VCO tank circuit Note the following when designing the VCO tank cercuit. In order to stable VCO oscillation, the VCO tank components (L1 and C1) should be placed as close to the IND1 (#28) and IND2 (#30) pins as possible(within 2 mm). -
Page 17: Rf Matching Component Values
ML7404 Family LSIs Hardware Design Manual 5. RF matching component values Table 5.1 shows the measured impedance of the PA_OUT (#20) pin and the LNA_P (#24) pin at operationg frequency.These impedances are presented as a reference. Table 5.1 Measured RF impedance R + jX [Ω] Tx （PA_OUT(#20) pin）... -
Page 18: Notes On Selecting External Parts (Recommendations)
ML7404 Family LSIs Hardware Design Manual 6. Notes on selecting external parts (recommendations) • Anntenna It is recommended to use an antenna with the specifications shown in Table 6.1. Select an antenna with the best directive characteristics for your specific operating, environmental and installation condition. -
Page 19: Standard
ML7404 Family LSIs Hardware Design Manual 8. Standard 8.1. ARIB STD-T108 In IEEE802.15.4k, in order to correspond to ARIB STD-T108, ML7404 should be used on condition of the following. • TX power: 10dBm •Unit channel: *[2] 5 bundled unit channel •Frequency range: *[3] 921MHz~924.6MHz... -
Page 20: Circuit For Rf Characteristic Measurement (920Mhz)
ML7404 Family LSIs Hardware Design Manual 9. Circuit for RF characteristic measurement (920MHz) [Note] In case of using TCXO, XIN(#5) pin should be “open”. FEXL7404DG-03... -
Page 21: Bill Of Materials
ML7404 Family LSIs Hardware Design Manual 10. Bill of Materials 10.1. 494.998MHz The following table shows the bill of materials for 20mW transmission circuit for ML7404 at 490MHz band. Common components Component Value Vender Remarks 3.6nH Murata Manufacturing Co., Ltd LQW15AN3N6G00 *2 22nH Murata Manufacturing Co., Ltd... - Page 22 ML7404 Family LSIs Hardware Design Manual Component Value Vender Remarks N.M. 100pF Murata Manufacturing Co., Ltd GRM155B11H101J N.M. 0.5pF Murata Manufacturing Co., Ltd GJM1555C1HR50WB 6.8pF Murata Manufacturing Co., Ltd GJM1554C1H6R8CB 0.3pF Murata Manufacturing Co., Ltd GJM1555C1HR30WB 6.8pF Murata Manufacturing Co., Ltd - GJM1554C1H6R8CB C103 N.M.
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Page 23: 920Mhz
ML7404 Family LSIs Hardware Design Manual 10.2. 920MHz The following table shows the bill of materials for 20mW transmission circuit for ML7404 at 920MHz band. Common components Component Value Vender Remarks 3.9nH Murata Manufacturing Co., Ltd LQW15AN4N3G00 *2 8.2nH Murata Manufacturing Co., Ltd LQW15AN7N3G00 5.8nH Murata Manufacturing Co., Ltd... - Page 24 ML7404 Family LSIs Hardware Design Manual Component Value Vender Remarks 100pF Murata Manufacturing Co., Ltd GRM155B11H101J N.M. 0.4pF Murata Manufacturing Co., Ltd GJM1555C1HR40WB 0Ω KOA Corporation RK73Z1JTTD 0.9pF Murata Manufacturing Co., Ltd GJM1555C1HR90WB N.M. C103 N.M. 6.2kΩ KOA Corporation RK73B1ETTP622J R101 N.M.
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Page 25: Application Circuit
ML7404 Family LSIs Hardware Design Manual 10.3. Application Circuit FEXL7404DG-03... -
Page 26: Revision History
ML7404 Family LSIs Hardware Design Manual Revision history Page Document No. Release Date Content Before After revision revision FEXL7404DG-02 May 28 , 2018 – – revision FEXL7404DG-03 Oct 5 , 2018 Bill of Materials(920MHz) added description to (*2) FEXL7404DG-03...
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