P2040A Product Preview LCD Panel EMI Reduction IC Product Description The P2040A is a versatile spread spectrum frequency modulator designed specifically for digital flat panel applications. The P2040A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The P2040A allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding, and other passive components that are traditionally required to pass EMI regulations. The P2040A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method. The P2040A 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.' * 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 * Input Frequency Range: 30 MHz to 100 MHz * 3.3 V Operating Voltage * Optimized for VGA, SVGA, and Higher Resolution XGA LCD * * * * * * * * * * SOIC-8 S SUFFIX CASE 751BD TSSOP-8 T SUFFIX CASE 948AL PIN CONFIGURATION CLKIN MRA SR1 1 VDD P2040A SR0 ModOUT SSON# VSS Features * http://onsemi.com (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. Panels Internal Loop Filter Minimizes External Components and Board Space Six Selectable High Spread Ranges up to 2% Two Selectable Modulation Rates SSON# Control Pin for Spread Spectrum Enable and Disable Options Low Cycle-to-Cycle Jitter Wide Operating Range Low Power CMOS Design Supports Most Mobile Graphic Accelerator Specifications Products Available for Automotive Temperature Range. (Refer to Spread Range Selection Tables) Available in 8-pin SOIC and TSSOP Packages These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice. (c) Semiconductor Components Industries, LLC, 2011 August, 2011 - Rev. P3 1 Publication Order Number: P2040A/D P2040A VDD SR0 SR1 MRA SSON# PLL Modulation CLKIN Frequency Divider Feedback Divider Loop Filter Phase Detector VCO Output Divider ModOUT VSS Figure 1. Block Diagram Table 1. PIN DESCRIPTION Pin# Pin Name Type Description 1 CLKIN I External reference frequency input. Connect to externally generated reference signal. 2 MRA I Digital logic input used to select modulation rate. This pin has an internal pull-up resistor. 3 SR1 I Digital logic input used to select Spreading Range. This pin has an internal pull-up resistor. 4 VSS P Ground to entire chip. Connect to system ground. 5 SSON# I Digital logic input used to enable Spread Spectrum function (Active LOW). Spread Spectrum function enabled when LOW, disabled when HIGH. 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. This pin has an internal pull-up resistor. 8 VDD P Power supply for the entire chip (3.3 V). Table 2. MODULATION SELECTION (Commercial) MRA SR1 SR0 Spreading Range Modulation Rate (KHz) 0 0 0 1.125 (FIN /40) * 34.72 KHz 0 0 1 1.75 (FIN /40) * 34.72 KHz 0 1 0 0.75 (FIN /40) * 34.72 KHz 0 1 1 1.25 (FIN /40) * 34.72 KHz 1 0 0 1.25 (FIN /40) * 20.83 KHz 1 0 1 2.00 (FIN /40) * 20.83 KHz 1 1 0 Reserved Reserved 1 1 1 Reserved Reserved http://onsemi.com 2 P2040A Table 3. SPREAD RANGE SELECTION AT 50 MHz (Automotive) MRA SR1 SR0 Spreading Range Modulation Rate 0 0 0 1.25 (FIN/40) * 34.72 KHz 0 0 1 2.00 (FIN/40) * 34.72 KHz 0 1 0 1.00 (FIN/40) * 34.72 KHz 0 1 1 1.50 (FIN/40) * 34.72 KHz 1 0 0 1.25 (FIN/40) * 20.83 KHz 1 0 1 2.00 (FIN/40) * 20.83 KHz 1 1 0 1.25 (FIN/40) * 20.83 KHz 1 1 1 2.00 (FIN/40) * 20.83 KHz Table 4. SPREAD RANGE SELECTION AT 70 MHz (Automotive) MRA SR1 SR0 Spreading Range Modulation Rate 0 0 0 1.00 (FIN/40) * 34.72 KHz 0 0 1 1.50 (FIN/40) * 34.72 KHz 0 1 0 0.70 (FIN/40) * 34.72 KHz 0 1 1 1.00 (FIN/40) * 34.72 KHz 1 0 0 1.15 (FIN/40) * 20.83 KHz 1 0 1 2.00 (FIN/40) * 20.83 KHz 1 1 0 1.15 (FIN/40) * 20.83 KHz 1 1 1 1.75 (FIN/40) * 20.83 KHz Spread Spectrum Selection spreading selection of MRA=0, SR1=1 and SR0=0 provides a percentage deviation of 0.75% from FIN. This results in the frequency on ModOUT being swept from 64.51 MHz to 65.49 MHz at a modulation rate of 56.24 KHz. Refer to Modulation Selection Table. The example in the following illustration is a common EMI reduction method for a notebook LCD panel and has already been implemented by most of the leading OEM and mobile graphic accelerator manufacturers. The Modulation Selection Table defines 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, pin1). For example, P2040A is designed for high-resolution, flat panel applications and is able to support an XGA (1024 x 768) flat panel operating at 65 MHz (FIN) clock speed. A +3.3 V 65 MHz from graphics accelerator. 1 CLKIN VDD 8 2 MRA SR0 7 3 SR1 ModOUT 6 4 VSS SSON# 5 P2040A 0.1 mF Modulated 65 MHz signal with 0.75 deviation and modulation rate of 56.24 KHz. This signal is connected back to the spread spectrum input pin (SSIN) of the graphics accelerator. Digital control for the SS enable or disable. Figure 2. Application Schematic for Mobile LCD Graphics Controllers http://onsemi.com 3 P2040A Table 5. ABSOLUTE MAXIMUM RATINGS Symbol Rating Unit Voltage on any pin with respect to Ground -0.5 to +4.6 V Storage temperature -65 to +125 C TA Operating temperature -40 to +125 C Ts Max. Soldering Temperature (10 sec) 260 C TJ Junction Temperature 150 C 2 KV VDD, VIN TSTG TDV Parameter 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. Table 6. DC ELECTRICAL CHARACTERISTICS (Test condition: All parameters are measured at room temperature (+25C) unless otherwise stated.) Parameter Symbol Min Typ Max Unit VIL Input low voltage VSS-0.3 - 0.8 V VIH Input high voltage 2.0 - VDD+0.3 V IIL Input low current (pull-up resistor on inputs SR0, SR1 and MRA) -35 - - mA IIH Input high current (pull-down resistor on input SSON#) - - 35 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 standby mode - 0.6 - mA ICC Dynamic supply current (3.3 V and 10 pF loading) 7 10 13 mA 2.7 3.3 3.7 V Power-up time (first locked cycle after power up) - 0.18 - mS Clock output impedance - 50 - W Min Typ Max Unit Input frequency 30 - 100 MHz Output frequency 30 - 100 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 2.0 V to 0.8 V) VDD tON ZOUT Operating voltage Table 7. AC ELECTRICAL CHARACTERISTICS Symbol fIN fOUT 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 P2040A 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 P2040A 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 P2040A Table 8. ORDERING INFORMATION Part Number Marking Package Type Temperature P2040AF-08-ST P2040AF 8-Pin SOIC, Tube, Pb Free Commercial P2040AF-08-SR P2040AF 8-Pin SOIC, Tape and Reel, Pb Free Commercial P2040AF-08-TT P2040AF 8-Pin TSSOP, Tube, Pb Free Commercial P2040AF-08-TR P2040AF 8-Pin TSSOP, Tape and Reel, Pb Free Commercial P2040AG-08-ST P2040AG 8-Pin SOIC, Tube, Green Commercial P2040AG-08-SR P2040AG 8-Pin SOIC, Tape and Reel, Green Commercial P2040AG-08-TT P2040AG 8-Pin TSSOP, Tube, Green Commercial P2040AG-08-TR P2040AG 8-Pin TSSOP, Tape and Reel, Green Commercial I2040AF-08-ST I2040AF 8-Pin SOIC, Tube, Pb Free Industrial I2040AF-08-SR I2040AF 8-Pin SOIC, Tape and Reel, Pb Free Industrial I2040AF-08-TT I2040AF 8-Pin TSSOP, Tube, Pb Free Industrial I2040AF-08-TR I2040AF 8-Pin TSSOP, Tape and Reel, Pb Free Industrial I2040AG-08-ST I2040AG 8-Pin SOIC, Tube, Green Industrial I2040AG-08-SR I2040AG 8-Pin SOIC, Tape and Reel, Green Industrial I2040AG-08-TT I2040AG 8-Pin TSSOP, Tube, Green Industrial I2040AG-08-TR I2040AG 8-Pin TSSOP, Tape and Reel, Green X2040AF-08-ST I2040AF 8-Pin SOIC, Tube, Pb Free Automotive Industrial X2040AF-08-SR I2040AF 8-Pin SOIC, Tape and Reel, Pb Free Automotive X2040AF-08-TT I2040AF 8-Pin TSSOP, Tube, Pb Free Automotive X2040AF-08-TR I2040AF 8-Pin TSSOP, Tape and Reel, Pb Free Automotive X2040AG-08-ST I2040AG 8-Pin SOIC, Tube, Green Automotive X2040AG-08-SR I2040AG 8-Pin SOIC, Tape and Reel, Green Automotive X2040AG-08-TT I2040AG 8-Pin TSSOP, Tube, Green Automotive X2040AG-08-TR I2040AG 8-Pin TSSOP, Tape and Reel, Green Automotive ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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