DSC2030 Low-Jitter Configurable LVDS Oscillator General Description Features The DSC2030 series of high performance LVDS oscillators utilize a proven silicon MEMS technology to provide excellent jitter and stability while incorporating additional device functionality. The DSC2030 allows the user to easily modify the frequency of the oscillator using pins. The DSC2030 has provision for up to four user-defined preprogrammed, pin-selectable output frequencies. Low RMS Phase Jitter: <1 ps (typ) DSC2030 is packaged in a 14-pin 3.2x2.5 mm QFN package and available in temperature grades from Ext. Commercial to Automotive. Wide Freq. Range: o LVDS Output: 2.3 to 460 MHz High Stability: ±10, ±25, ±50 ppm Wide Temperature Range o Industrial: -40° to 85° C o Ext. commercial: -20° to 70° C High Supply Noise Rejection: -50 dBc 4 Pin-Selectable Output Frequencies Short Lead Times: 2 Weeks Miniature Footprint of 3.2x2.5mm Excellent Shock & Vibration Immunity o Qualified to MIL-STD-883 High Reliability o 20x better MTF than quartz oscillators Supply Range of 2.25 to 3.6 V Lead Free & RoHS Compliant Block Diagram Applications Consumer Electronics Storage Area Networks o SATA, SAS, Fibre Channel Passive Optical Networks o EPON, 10G-EPON, GPON, 10G-PON Ethernet o 1G, 10GBASE-T/KR/LR/SR, and FCoE HD/SD/SDI Video & Surveillance PCI Express _____________________________________________________________________________________________________________________________ _________________ DSC2030 Page 1 MK-Q-B-P-D-12042606-2 DSC2030 Low-Jitter Configurable LVDS Oscillator Pin Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Pin Name Enable NC NC GND FS0 FS1 NC Output+ OutputNC NC VDD2 VDD NC Pin Type I NA NA Power I I NA O O NA NA Power Power NA Description Enables outputs when high and disables when low Leave unconnected or grounded Leave unconnected or grounded Ground Least significant bit for frequency selection Most significant bit for frequency selection Leave unconnected or grounded Positive LVDS Output Negative LVDS Output Leave unconnected or grounded Leave unconnected or grounded Power Supply Power Supply Leave unconnected or grounded Operational Description The DSC2030 is a LVDS oscillator consisting of a MEMS resonator and a support PLL IC. The LVDS output is generated through independent 8-bit programmable dividers from the output of the internal PLL. different frequencies. Two control pins (FS0 – FS1) select the output frequency. Discera supports customer defined versions of the DSC2030. Standard frequency options are described in the following sections. The actual frequency output by the DSC2030 is controlled by an internal pre-programmed memory (OTP). This memory stores all coefficients required by the PLL for up to four When Enable (pin 1) is floated or connected to VDD, the DSC2030 is in operational mode. Driving Enable to ground will tri-state output driver (hi-impedance mode). Output Clock Frequencies Table 1 lists the standard frequency configurations and the associated ordering information to be used in conjunction with the ordering code. Customer defined combinations are available. Table 1. Pre-programmed pin-selectable output frequency combinations Freq Select Bits [FS1, FS0] – Default is [11] Ordering Info Freq (MHz) 00 01 10 11 C0001 fOUT 148.35165 74.17582 148.5 74.25 C0002 fOUT 100 0* 0* 100 C0003 fOUT 100 150 156.25 312.5 C0004 fOUT 148.5 148.35 0* 0* C0005 fOUT 315 0* 0* 315 C000X fOUT Contact factory for additional configurations. Frequency select bit are weakly tied high so if left unconnected the default setting will be [11] and the device will output the associated frequency highlighted in Bold. 0* – denotes invalid selection, output frequency is not specified. _____________________________________________________________________________________________________________________________ _________________ DSC2030 Page 2 MK-Q-B-P-D-12042606-2 DSC2030 Low-Jitter Configurable LVDS Oscillator Absolute Maximum Ratings Item Min Max Unit Supply Voltage -0.3 +4.0 V Input Voltage -0.3 VDD+0.3 V Junction Temp - +150 °C Storage Temp -55 +150 °C Soldering Temp - +260 °C ESD HBM MM CDM - Ordering Code Condition Temp Range E: -20 to 70 I: -40 to 85 40sec max. DSC2030 V F I 2 Package F: 3.2x2.5mm 4000 400 1500 - xxxxx Stability 1: ±50ppm 2: ±25ppm 5: ±10ppm Packing T: Tape & Reel : Tube T Freq (MHz) See Freq. table Note: 1000+ years of data retention on internal memory Specifications (Unless specified otherwise: T=25° C) Parameter Supply Voltage 1 Condition VDD Supply Current IDD Supply Current2 IDD Frequency Stability Δf Aging Startup Time3 Δf tSU Input Logic Levels Input logic high Input logic low VIH VIL Output Disable Time4 Output Enable Time Min. Typ. 2.25 EN pin low – output is disabled EN pin high – outputs are enabled RL=100Ω, FO= 156.25 MHz Includes frequency variations due to initial tolerance, temp. and power supply voltage 1 year @25°C T=25°C Max. Unit 3.6 V 21 23 mA 29 32 mA ±10 ±25 ±50 ±5 5 ppm ms 0.25xVDD V tDA 5 ns tEN 20 ns 2 Pull-Up Resistor 0.75xVDD - ppm Pull-up exists on all digital IO 40 kΩ LVDS Output Output Offset Voltage R=100Ω Differential 1.125 Delta Offset Voltage Pk to Pk Output Swing Single-Ended 350 20% to 80% RL=100Ω, CL= 2pF 200 Output Transition time4 Rise Time Fall Time tR tF Frequency f0 Single Frequency SYM Differential Output Duty Cycle 5 Period Jitter Integrated Phase Noise Notes: 1. 2. 3. 4. 5. 1.4 V 50 mV mV 350 ps 2.3 460 MHz 48 52 % JPER FO=156.25 MHz 2.5 JCC 200kHz to 20MHz @156.25MHz 100kHz to 20MHz @156.25MHz 12kHz to 20MHz @156.25MHz 0.28 0.4 1.7 psRMS 2 psRMS Pin 4 VDD should be filtered with 0.01uf capacitor. Output is enabled if Enable pad is floated or not connected. tsu is time to 100PPM stable output frequency after VDD is applied and outputs are enabled. Output Waveform and Test Circuit figures below define the parameters. Period Jitter includes crosstalk from adjacent output. _____________________________________________________________________________________________________________________________ _________________ DSC2030 Page 3 MK-Q-B-P-D-12042606-2 DSC2030 Low-Jitter Configurable LVDS Oscillator Nominal Performance Parameters (Unless specified otherwise: T=25° C, VDD=3.3 V) 2.5 Phase Jitter (ps RMS) 156MHz-LVDS 212MHz-LVDS 2.0 320MHz-LVDS 1.5 410MHz-LVDS 1.0 0.5 0.0 0 200 400 600 800 1000 Low-end of integration BW: x kHz to 20 MHz LVDS Phase jitter (integrated phase noise) Output Waveform: LVDS tR Output tF 80% 350 mV 830 mv 50% Output 20% tEN 1/f o tDA VIH Enable VIL _____________________________________________________________________________________________________________________________ _________________ DSC2030 Page 4 MK-Q-B-P-D-12042606-2 DSC2030 Low-Jitter Configurable LVDS Oscillator Solder Reflow Profile 20-40 Sec Se 3C / 217°C 200°C 60-150 Sec . ax cM Se 3C / 25°C a x. Reflow 60-180 Sec cM 150°C Se 6C/ Temperature (°C) cM ax . 260°C Cool Pre heat Time 8 min max MSL 1 @ 260°C refer to JSTD-020C Ramp-Up Rate (200°C to Peak Temp) 3°C/Sec Max. Preheat Time 150°C to 200°C 60-180 Sec Time maintained above 217°C 60-150 Sec 255-260°C Peak Temperature Time within 5°C of actual Peak 20-40 Sec 6°C/Sec Max. Ramp-Down Rate Time 25°C to Peak Temperature 8 min Max. Package Dimensions 3.2 x 2.5 mm 14 Lead Plastic Package Disclaimer: Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. MICREL, Inc. Phone: +1 (408) 944-0800 ● ● 2180 Fortune Drive, Fax: +1 (408) 474-1000 San Jose, California 95131 ● Email: [email protected] ● ● USA www.micrel.com _____________________________________________________________________________________________________________________________ _________________ DSC2030 Page 5 MK-Q-B-P-D-12042606-2