FS6182 VCXO Clock Generator IC 1.0 Features 2.0 * Three output clock frequencies * On-chip tunable voltage-controlled crystal oscillator (VCXO) allows precise system frequency tuning * Wide crystal "pulling" range (typically 300ppm) * VCXO tuning range from 0-3 volt * 3.3V supply voltage (contact factory for 5V) * Small circuit board footprint (8-pin 0.150 SOIC) * Custom frequency selections available - contact your local AMI Sales Representative for more information Figure 1: Pin Configuration 1 GND 2 XIN 3 XOUT 4 FS6182 CLKA 8 XTUNE 7 VDD 6 CLKC 5 CLKB Description The FS6182 is a monolithic CMOS clock generator IC designed to minimize cost and component count in digital video/audio systems. At the core of the FS6182 is circuitry that implements a voltage-controlled crystal oscillator when an external resonator (nominally 13.5MHz) is attached. The VCXO allows device frequencies to be precisely adjusted for use in systems that have frequency matching requirements, such as digital satellite receivers. A high-resolution phase-locked loop generates three output clocks (CLKA, CLKB, and CLKC) through an array of post-dividers. All frequencies are ratiometrically derived from the VCXO frequency. The locking of all the output frequencies together can eliminate unpredictable artifacts in video systems. Table 1: Crystal / Output Frequencies 8-pin (0.150) SOIC DEVICE fXIN (MHz) CLKA (MHz) CLKB (MHz) CLKC (MHz) FS6182-01 13.500 27.000 54.000 13.500 NOTE: Contact AMI for custom PLL frequencies and 5 volt operation Figure 2: Block Diagram XIN VCXO CLKA PLL XOUT XTUNE DIVIDER ARRAY CLKB CLKC FS6182 This document contains information on a new product. Specifications and information herein are subject to change without notice. ISO9001 2.27.02 FS6182 VCXO Clock Generator IC Table 2: Pin Descriptions Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DIU = Input with Internal Pull-Up; DID = Input with Internal Pull-Down; DIO = Digital Input/Output; DI-3 = Three-Level Digital Input, DO = Digital Output; P = Power/Ground; # = Active Low pin PIN TYPE NAME DESCRIPTION 1 DO CLKA Clock Output A 2 P GND Ground 3 AI XIN VCXO Feedback 4 AO XOUT VCXO Drive 5 DO CLKB Clock Output B 6 DO CLKC Clock Output C 7 P VDD Power Supply (+3.3V) 8 AI XTUNE VCXO Tune 3.0 Functional Block Description 3.1 Phase-Locked Loop (PLL) the oscillator circuit. The actual amount that changing the load capacitance alters the oscillator frequency will be dependent on the characteristics of the crystal as well as the oscillator circuit itself. Specifically, the motional capacitance of the crystal (usually referred to by crystal manufacturers as C1), the static capacitance of the crystal (C0), and the load capacitance (CL) of the oscillator determine the warping capability of the crystal in the oscillator circuit. A simple formula to obtain the warping capability of a crystal oscillator is: The on-chip PLLs are a standard frequency- and phaselocked loop architecture. The PLL multiplies the reference oscillator to the desired frequency by a ratio of integers. The frequency multiplication is exact with a zero synthesis error. 3.2 Voltage-Controlled Crystal Oscillator (VCXO) f ( ppm) = The VCXO provides a tunable, low-jitter frequency reference for the rest of the FS6182 system components. Loading capacitance for the crystal is internal to the FS6182. No external components (other than the resonator itself) are required for operation of the VCXO. Continuous fine-tuning of the VCXO frequency is accomplished by varying the voltage on the XTUNE pin. The total change (from one extreme to the other) in effective loading capacitance is from 13pF to 35pF. The oscillator operates the crystal resonator in the parallel-resonant mode. Crystal warping, or the "pulling" of the crystal oscillation frequency, is accomplished by altering the effective load capacitance presented to the crystal by C1 x (C L 2 - C L1) x 10 2 x (C 0 + C L 2 ) x (C 0 + C L1) 6 where CL1 and CL2 are the two extremes of the applied load capacitance. EXAMPLE: A crystal with the following parameters is used. With C1 = 0.02pF, C0 = 5pF, CL1 = 13pF, and CL2 = 35pF, the coarse tuning range (peak-to-peak) is: f = 0.02 x (35 - 13) x 106 = 305 ppm . 2 x (5 + 35) x (5 + 13) 2 ISO9001 2.27.02 FS6182 VCXO Clock Generator IC 4.0 Electrical Specifications Table 3: Absolute Maximum Ratings Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These conditions represent a stress rating only, and functional operation of the device at these or any other conditions above the operational limits noted in this specification is not implied. Exposure to maximum rating conditions for extended conditions may affect device performance, functionality, and reliability. PARAMETER SYMBOL MIN. MAX. UNITS VDD VSS-0.5 7 V Input Voltage, dc VI VSS-0.5 VDD+0.5 V Output Voltage, dc VO VSS-0.5 VDD+0.5 V Input Clamp Current, dc (VI < 0 or VI > VDD) IIK -50 50 mA Output Clamp Current, dc (VI < 0 or VI > VDD) IOK -50 50 mA Storage Temperature Range (non-condensing) TS -65 150 C Ambient Temperature Range, Under Bias TA -55 125 C Junction Temperature TJ 125 C 260 C 2 kV Supply Voltage (VSS = ground) Lead Temperature (soldering, 10s) Input Static Discharge Voltage Protection (MIL-STD 883E, Method 3015.7) CAUTION: ELECTROSTATIC SENSITIVE DEVICE Permanent damage resulting in a loss of functionality or performance may occur if this device is subjected to a high-energy electrostatic discharge. Table 4: Operating Conditions PARAMETER SYMBOL Supply Voltage VDD Ambient Operating Temperature Range TA CONDITIONS/DESCRIPTION 3.3V 10% MIN. TYP. MAX. 3.0 3.3 3.6 V 70 C 0 UNITS 3 ISO9001 2.27.02 FS6182 VCXO Clock Generator IC Table 5: DC Electrical Specifications Unless otherwise stated, VDD = 3.3V 10%, no load on any output, and ambient temperature range TA = 0C to 70C. Parameters denoted with an asterisk ( * ) represent nominal characterization data and are not production tested to any specific limits. Where given, MIN and MAX characterization data are 3 from typical. Negative currents indicate current flows out of the device. PARAMETER SYMBOL CONDITIONS/DESCRIPTION MIN. TYP. MAX. UNITS Overall Supply Current, Dynamic, with Loaded Outputs IDD fXTAL = 13.5MHz; CL = 10pF 20 mA Voltage Controlled Crystal Oscillator Crystal Resonator Frequency fXTAL Fundamental Mode 5 13.5 18 MHz As seen by a crystal connected to XIN and XOUT (@ VXTUNE = mid-range) 20 20 fF VCXO Tuning Range fXTAL = 13.5MHz; CL = 20pF; CMOT = 25fF 300 ppm VCXO Tuning Characteristic Note: positive delta F for positive delta V 100 ppm/V Crystal Drive Level RXTAL=20 ohm; CL = 20pF 200 uW IOH VO = 2.0V 40 mA mA Crystal Loading Capacitance CL(xtal) Crystal Resonator Motional Capacitance C1(xtal) pF Clock Outputs (CLKA, CLKB, CLKC) High-Level Output Source Current * Low-Level Output Sink Current * IOL VO = 0.4V 17 zOH VO = 0.1VDD; output driving high 25 zOL VO = 0.1VDD; output driving low 25 Short Circuit Source Current * IOSH VO = 0V; shorted for 30s, max. 55 mA Short Circuit Sink Current * IOSL VO = 3.3V; shorted for 30s, max. 55 mA Output Impedance * Table 6: AC Timing Specifications Unless otherwise stated, VDD = 3.3V 10%, no load on any output, and ambient temperature range TA = 0C to 70C. Parameters denoted with an asterisk ( * ) represent nominal characterization data and are not production tested to any specific limits. Where given, MIN and MAX characterization data are 3 from typical. PARAMETER SYMBOL CONDITIONS/DESCRIPTION MIN. TYP. MAX. UNITS 57 % Clock Outputs (CLKx) Duty Cycle * Jitter, Absolute Period (pk-pk) * thi / tclk; Measured at VDD/2 tj(P) Rise Time * tr Fall Time * tf Output Frequency Synthesis Error VCXO Stabilization Time * PLL Stabilization Time * From rising edge to next rising edge at VDD/2, CL = 10pF 43 150 ps VDD = 3.3V; VO = 0.3V to 3.0V; CL = 10pF 1 ns VDD = 3.3V; VO = 3.0V to 0.3V; CL = 10pF 1 (unless otherwise noted in Frequency Table) tVCXOSTB tPLLSTB ns 0 ppm From power valid 10 ms From VCXO stable 500 us 4 ISO9001 2.27.02 FS6182 VCXO Clock Generator IC 5.0 Package Information Table 7: 8-pin SOIC (0.150") Package Dimensions 8 DIMENSIONS INCHES MIN. MAX. MILLIMETERS MIN. MAX. A 0.061 0.068 1.55 1.73 A1 0.004 0.0098 0.102 0.249 A2 0.055 0.061 1.40 1.55 B 0.013 0.019 0.33 0.49 C 0.0075 0.0098 0.191 0.249 D 0.189 0.196 4.80 4.98 E 0.150 0.157 3.81 3.99 e 0.050 BSC R E H AMERICAN MICROSYSTEMS, INC. 1 ALL RADII: 0.005" TO 0.01" h x 45 B 7 typ. e 1.27 BSC H 0.230 0.244 5.84 6.20 h 0.010 0.016 0.25 0.41 L 0.016 0.035 0.41 0.89 0 8 0 8 A2 A D C A1 BASE PLANE L SEATING PLANE Table 8: 8-pin SOIC (0.150") Package Characteristics PARAMETER SYMBOL Thermal Impedance, Junction to Free-Air 8-pin 0.150" SOIC JA Lead Inductance, Self L11 CONDITIONS/DESCRIPTION TYP. UNITS Air flow = 0 m/s 110 C/W Corner lead 2.0 Center lead 1.6 nH Lead Inductance, Mutual L12 Any lead to any adjacent lead 0.4 nH Lead Capacitance, Bulk C11 Any lead to VSS 0.27 pF 5 ISO9001 2.27.02 FS6182 VCXO Clock Generator IC 6.0 Ordering Information ORDERING CODE DEVICE NUMBER PACKAGE TYPE OPERATING TEMPERATURE RANGE SHIPPING CONFIGURATION 11640-804 FS6182-01 8-pin (0.150") SOIC (Small Outline Package) 0C to 70C (Commercial) Tape and Reel 11640-814 FS6182-01 8-pin (0.150") SOIC (Small Outline Package) 0C to 70C (Commercial) Tubes Copyright (c) 1998 American Microsystems, Inc. Devices sold by AMI are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. AMI makes no warranty, express, statutory implied or by description, regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. AMI makes no warranty of merchantability or fitness for any purposes. AMI reserves the right to discontinue production and change specifications and prices at any time and without notice. AMI's products are intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing by AMI for such applications. American Microsystems, Inc., 2300 Buckskin Rd., Pocatello, ID 83201, (208) 233-4690, FAX (208) 234-6796, WWW Address: http://www.amis.com E-mail: tgp@amis.com 6 ISO9001 2.27.02