P2027A General Purpose EMI Reduction IC 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 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. 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 http://onsemi.com SOIC-8 S SUFFIX CASE 751BD TSSOP-8 T SUFFIX CASE 948AL PIN CONFIGURATION XIN / CLKIN 1 VDD SR0 XOUT MRA ModOUT VSS SSON (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. 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 3.3 V 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 These are Pb-Free Devices (c) Semiconductor Components Industries, LLC, 2011 August, 2011 - Rev. 2 1 Publication Order Number: P2027A/D P2027A VDD MRA SR0 SSON PLL Modulation XIN Crystal Oscillator XOUT Frequency Divider Feedback Divider Phase Detector Loop Filter Output Divider VCO ModOUT VSS Figure 1. Block Diagram Table 1. PIN DESCRIPTION Pin# Pin Name Type Description 1 XIN / CLKIN I 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. 2 XOUT O Crystal connection. Input connection for an external crystal. If using an external reference, this pin must be left unconnected. 3 MRA I Digital logic input used to select Modulation Rate (see Table 2). This pin has an internal pull-up resistor. 4 VSS P Ground Connection. Connect to system ground. 5 SSON I 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. 6 ModOUT O Spread Spectrum Clock Output. 7 SR0 I Digital logic input used to select Spreading Range (see Table 2). This pin has an internal pull-up resistor. 8 VDD P Connect to +3.3 V Power Supply. Table 2. MODULATION AND SPREADING SELECTION MRA SR0 Spread Range Modulation Rate 0 0 Reserve Reserve 0 1 0.30% (Fin/10)*34.72 KHz 1 0 0.20% (Fin/10)*20.83 KHz 1 1 0.60% (Fin/10)*20.83 KHz http://onsemi.com 2 P2027A Spread Spectrum Selection Example: Table 2 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). 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 2) 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 2). 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. Figure 2. Application Schematic for Digital Still Camera Table 3. ABSOLUTE MAXIMUM RATINGS Symbol VDD, VIN TSTG Parameter Rating Unit Voltage on any pin with respect to Ground -0.5 to +4.6 V Storage temperature -65 to +125 C 0 to 70 C C TA Operating temperature Ts Max. Soldering Temperature (10 sec) 260 TJ Junction Temperature 150 C 2 KV TDV Static Discharge Voltage (As per JEDEC STD22- A114-B) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. http://onsemi.com 3 P2027A Table 4. DC ELECTRICAL CHARACTERISTICS Symbol Parameter Min Typ Max Unit VIL Input Low Voltage GND-0.3 - 0.8 V VIH Input High Voltage 2.0 - VDD + 0.3 V IIL Input Low Current (pull-up resistor on inputs FS0, SR0 and MRA) - - -35 mA IIH Input High Current (pull-down resistor on input SSON) - - 35 mA IXOL XOUT Output Low Current (@ 0.4 V, VDD = 3.3 V) - 3 - mA IXOH XOUT Output High Current (@ 2.5 V, VDD = 3.3 V) - 3 - mA VOL Output Low Voltage (VDD = 3.3 V, IOL = 20 mA) - - 0.4 V VOH Output High Voltage (VDD = 3.3 V, IOH = 20 mA) 2.5 - - V IDD Static Supply Current - 6.0 - mA ICC Dynamic Supply Current (3.3 V and 15 pF loading) 6.0 7.0 8.3 mA VDD Operating Voltage 2.7 3.3 3.8 V tON Power Up Time (First locked clock cycle after power up) ZOUT Clock Output Impedance 0.18 ms 50 W Table 5. AC ELECTRICAL CHARACTERISTICS Symbol Min Typ Max Unit Input Frequency 10 27 30 MHz tLH (Note 1) Output rise time (Measured at 0.8 V to 2.0 V) 0.7 0.9 1.1 ns tHL (Note 1) Output fall time (Measured at 0.8 V to 2.0 V) fIN Parameter 0.6 0.8 1.0 ns tJC Jitter (cycle-to-cycle) - - 360 ps tD Output duty cycle 45 50 55 % 1. tLH and tHL are measured into a capacitive load of 15 pF. http://onsemi.com 4 P2027A PACKAGE DIMENSIONS TSSOP8, 4.4x3 CASE 948AL-01 ISSUE O b SYMBOL MIN NOM A E1 E MAX 1.20 A1 0.05 A2 0.80 b 0.19 0.30 c 0.09 0.20 D 2.90 3.00 3.10 E 6.30 6.40 6.50 E1 4.30 4.40 4.50 0.15 0.90 e 0.65 BSC L 1.00 REF L1 0.50 0 0.60 1.05 0.75 8 e TOP VIEW D A2 c q1 A A1 L1 SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-153. http://onsemi.com 5 P2027A PACKAGE DIMENSIONS SOIC 8, 150 mils CASE 751BD-01 ISSUE O E1 E SYMBOL MIN A 1.35 1.75 A1 0.10 0.25 b 0.33 0.51 c 0.19 0.25 D 4.80 5.00 E 5.80 6.20 E1 3.80 4.00 MAX 1.27 BSC e PIN # 1 IDENTIFICATION NOM h 0.25 0.50 L 0.40 1.27 0 8 TOP VIEW D h A1 A c e b L END VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. http://onsemi.com 6 P2027A Table 6. ORDERING CODES Part Number Marking P2027AF-08ST P2027AF 8-PIN SOIC, TUBE, Pb Free Package Type Temperature Commercial P2027AF-08SR P2027AF 8-PIN SOIC, TAPE AND REEL, Pb Free Commercial P2027AF-08TT P2027AF 8-PIN TSSOP, TUBE, Pb Free Commercial P2027AF-08TR P2027AF 8-PIN TSSOP, TAPE AND REEL, Pb Free Commercial P2027AG-08ST P2027AG 8-PIN SOIC, TUBE, Green Commercial P2027AG-08SR P2027AG 8-PIN SOIC, TAPE AND REEL, Green Commercial P2027AG-08TT P2027AG 8-PIN TSSOP, TUBE, Green Commercial P2027AG-08TR P2027AG 8-PIN TSSOP, TAPE AND REEL, Green Commercial ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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