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| November 2006 rev 0.2 General Purpose EMI Reduction IC Features * FCC approved method of EMI attenuation * Provides up to 20 dB of EMI suppression * Generates a low EMI spread spectrum clock of the input frequency * Optimized for 27 MHz operation * Internal loop filter minimizes external components and board space * 3 selectable spread ranges and 2 modulation rate options * SSON control pin for spread spectrum enable and disable options * Low cycle-to-cycle jitter * 3.3V operating voltage * 16 mA output drives * TTL or CMOS compatible outputs * Low power CMOS design * Supports digital camera and other digital video and imaging applications * Available in 8 pin SOIC and TSSOP Packages Product Description The P2027 is a versatile spread spectrum frequency modulator designed specifically for digital camera and other digital video and imaging applications. The P2027 reduces electromagnetic interference (EMI) at Block Diagram MRA SR0 SSON P2027A the clock source, which provides system wide reduction of EMI of all clock dependent signals. The P2027 allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The P2027 uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all-digital method. The P2027 modulates the output of a single PLL in order to "spread" the bandwidth of a synthesized clock and, more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal's bandwidth is called "spread spectrum clock generation". Applications The P2027 is targeted towards DSC market as well as other imaging and digital video applications like DVD and VCD players. VDD PLL Modulation XIN XOUT Crystal Oscillator Frequency Divider Feedback Divider Phase Detector Loop Filter VCO Output Divider ModOUT VSS PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200, Campbell, CA 95008 * Tel: 408-879-9077 * Fax: 408-879-9018 www.pulsecoresemi.com Notice: The information in this document is subject to change without notice. November 2006 rev 0.2 Pin Configuration XIN / CLKIN 1 XOUT 2 8 VDD 7 SRO P2027A P2027A MRA 3 VSS 4 6 ModOUT 5 SSON Pin Description Pin# 1 2 3 4 5 6 7 8 Pin Name XIN/CLK XOUT MRA VSS SSON ModOUT SR0 VDD Type I O I P I O I P Description Crystal connection or external reference frequency input. This pin has dual functions. It can be connected to either an external crystal or an external reference clock. Crystal connection. Input connection for an external crystal. If using an external reference, this pin must be left unconnected. Digital logic input used to select Modulation Rate (see Table 1). This pin has an internal pull-up resistor. Ground Connection. Connect to system ground. Digital logic input used to enable Spread Spectrum function (Active Low). Spread Spectrum function enable when low. This pin has an internal pull-low resistor. Spread Spectrum Clock Output. Digital logic input used to select Spreading Range (see Table 1). This pin has an internal pull-up resistor. Connect to +3.3V Power Supply. General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 2 of 8 November 2006 rev 0.2 Table-1 Modulation and Spreading Selection MRA 0 0 1 1 SR0 0 1 0 1 Spread Range Reserve +/- 0.30% +/- 0.20% +/- 0.60% Modulation Rate Reserve (Fin/10)*34.72 KHz (Fin/10)*20.83 KHz (Fin/10)*20.83 KHz P2027A Spread Spectrum Selection Table 1 illustrates the possible spread spectrum options. The optimal setting should minimize system EMI to the fullest without affecting system performance. The spreading is described as a percentage deviation of the center frequency (Note: the center frequency is the frequency of the external reference input on CLKIN, Pin 1). Example: P2027 is designed for DSC and digital video and imaging markets and is optimized for 27 MHz under minimum deviation settings. Selecting P2027's spread options to MRA=1 and SR0=1 for a 27 MHz input signal provides a percentage deviation of +/-0.60% (see Table 1) from the reference signal. This results in frequency on ModOUT being swept from 27.16 MHz to 26.84 MHz at a modulation rate of 56.24 KHz (see Table 1). This particular example (see the below figure) given here is a new EMI reduction method for DSC applications and is already gaining popularity among leading manufacturers. Application Schematic for Digital Still Camera General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 3 of 8 November 2006 rev 0.2 Absolute Maximum Ratings Symbol VDD, VIN TSTG TA Ts TJ TDV Storage temperature Operating temperature Max. Soldering Temperature (10 sec) Junction Temperature Static Discharge Voltage (As per JEDEC STD22- A114-B) P2027A Parameter Voltage on any pin with respect to Ground Rating -0.5 to +4.6 -65 to +125 0 to 70 260 150 2 Unit V C C C C KV Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability. DC Electrical Characteristics Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH IDD ICC VDD tON ZOUT Input Low Voltage Input High Voltage Input Low Current (pull-up resistor on inputs FS0, SR0 and MRA) Input High Current (pull-down resistor on input SSON) XOUT Output Low Current (@ 0.4V, VDD = 3.3V) XOUT Output High Current (@ 2.5V, VDD = 3.3V) Output Low Voltage (VDD = 3.3V, IOL = 20 mA) Output High Voltage (VDD = 3.3V, IOH = 20 mA) Static Supply Current Dynamic Supply Current (3.3V and 15 pF loading) Operating Voltage Power Up Time (First locked clock cycle after power up) Clock Output Impedance Parameter Min GND - 0.3 2.0 2.5 6.0 2.7 Typ 3 3 6.0 7.0 3.3 0.18 50 Max 0.8 VDD + 0.3 -35 35 0.4 8.3 3.8 Unit V V A A mA mA V V mA mA V ms AC Electrical Characteristics Symbol fIN tLH* tHL* tJC tD Input Frequency Output rise time (Measured at 0.8V to 2.0V) Output fall time (Measured at 0.8V to 2.0V) Jitter (cycle to cycle) Output duty cycle Parameter Min 10 0.7 0.6 45 Typ 27 0.9 0.8 50 Max 30 1.1 1.0 360 55 Unit MHz ns ns ps % *tLH and tHL are measured into a capacitive load of 15pF General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 4 of 8 November 2006 rev 0.2 Package Information P2027A 8-lead (150-mil) SOIC Package E H D A2 A e B A 1 C L D Dimensions Symbol Min A1 A A2 B C D E e H L Inches Max 0.010 0.069 0.059 0.020 0.010 0.004 0.053 0.049 0.012 0.007 Millimeters Min Max 0.10 1.35 1.25 0.31 0.18 4.90 BSC 3.91 BSC 1.27 BSC 6.00 BSC 0.41 0 1.27 8 0.25 1.75 1.50 0.51 0.25 0.193 BSC 0.154 BSC 0.050 BSC 0.236 BSC 0.016 0 0.050 8 General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 5 of 8 November 2006 rev 0.2 8-lead TSSOP (4.40-MM Body) P2027A H E D A2 A e B A1 L C Dimensions Symbol Min A A1 A2 B c D E e H L 0.020 0 0.002 0.033 0.008 0.004 0.114 0.169 0.026 BSC 0.252 BSC 0.028 8 0.50 0 Inches Max 0.043 0.006 0.037 0.012 0.008 0.122 0.177 0.05 0.85 0.19 0.09 2.90 4.30 Millimeters Min Max 1.10 0.15 0.95 0.30 0.20 3.10 4.50 0.65 BSC 6.40 BSC 0.70 8 General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 6 of 8 November 2006 rev 0.2 Ordering Codes Part Number P2027AF-08ST P2027AF-08SR P2027AF-08TT P2027AF-08TR P2027AG-08ST P2027AG-08SR P2027AG-08TT P2027AG-08TR P2027A Marking P2027AF P2027AF P2027AF P2027AF P2027AG P2027AG P2027AG P2027AG Package Type 8 PIN SOIC, TUBE, Pb Free 8 PIN SOIC, TAPE AND REEL, Pb Free 8 PIN TSSOP, TUBE, Pb Free 8 PIN TSSOP, TAPE AND REEL, Pb Free 8 PIN SOIC, TUBE, Green 8 PIN SOIC, TAPE AND REEL, Green 8 PIN TSSOP, TUBE, Green 8 PIN TSSOP, TAPE AND REEL, Green Temperature Commercial Commercial Commercial Commercial Commercial Commercial Commercial Commercial Device Ordering Information P 2027A F 08 ST Package: ST - SOIC, TUBE SR - SOIC, T/R TT - TSSOP, TUBE TR - TSSOP, T/R PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE, LEAD FREE, and RoHS PART NUMBER P = Commercial Temperature Range (0C to 70C) I = Industrial Temperature Range (-25C to 85C) A = Automotive Temperature Range (-40C to 125C) Licensed under US patent Nos 5,488,627 and 5,631,920. General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 7 of 8 November 2006 rev 0.2 P2027A PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Copyright (c) PulseCore Semiconductor All Rights Reserved Preliminary Information Part Number: P2027A Document Version: 0.2 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 (c) Copyright 2006 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective companies. PulseCore reserves the right to make changes to this document and its products at any time without notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents PulseCore's best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in PulseCore's Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are made exclusively according to PulseCore's Terms and Conditions of Sale. The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use. General Purpose EMI Reduction IC Notice: The information in this document is subject to change without notice. 8 of 8 |
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