PDF SY88309BL Data sheet ( Hoja de datos )

Número de pieza	SY88309BL
Descripción	3.2Gbps PECL Limiting Post Amplifier
Fabricantes	Micrel Semiconductor
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No Preview Available ! SY88309BL 3.3V, 3.2Gbps PECL Limiting Post Amplifier with Wide Signal-Detect Range General Description The SY88309BL low-power limiting post amplifiers are designed for use in fiber-optic receivers. These devices connect to typical transimpedance amplifiers (TIAs). The linear signal output from TIAs can contain significant amounts of noise and may vary in amplitude over time. The SY88309BL quantizes these signals and output PECL-level waveforms. The SY88309BL operates from a single +3.3V power supply, over temperatures ranging from –40oC to +85oC. With their wide bandwidth and high gain, signals with data rates up to 3.2Gbps, and as small as 10mVpp, can be amplified to drive devices with CML or PECL inputs. It generates a Signal Detect (SD) open-collector TTL output. The SD function is optimized to detect a larger and wider input range, as shown in the characteristic curve on page 6. A programmable signal-detect level set pin (SDLVL) sets the sensitivity of the input amplitude detection. SD asserts high if the input amplitude rises above the threshold sets by SDLVL and de-asserts low otherwise. The SD output can be fed back to the EN input to maintain stability. Typically, 3.5dB LOS/SD hysteresis is provided to prevent chattering. Datasheet and support documentation can be found on Micrel’s web site at: www.micrel.com. Features • Signal Detect circuit optimized to detect a larger and wider input range (20mVPP-140mVPP) • Chatter-free Open-Collector TTL Signal-Detect (SD) • Single 3.3V power supply • 155Mbps to 3.2Gbps operation • Low-noise PECL data outputs • Programmable SD level set (SDLVL) • Available in a tiny 10-pin EPAD-MSOP and 16-pin QFN package Applications • PON • Gigabit Ethernet • 1X and 2X Fibre Channel • SONET/SDH:OC-3/12/24/48 – STM 1/4/8/16 • High-gain line driver and line receiver Markets • FTTX • Optical transceivers • Datacom/Telecom • Low-gain TIA interface • Long-reach FOM Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com November 2007 M9999-111507-C [email protected] or (408) 955-1690 1 page Micrel, Inc. SY88309BL AC Electrical Characteristics VCC = 3.0V to 3.6V; RL = 50Ω to VCC-2V; TA = –40°C to +85°C; typical values at VCC = 3.3V, TA = +25°C. Symbol tr, tf Parameter Output Rise/Fall Time (20% to 80%) Condition Note 4 Min Typ Max Units 150 ps tJITTER VID VOD TOFF TON SDAL SDDL HYSL SDAM SDDM HYSM SDAH SDDH HYSH B-3dB AV(Diff) S21 Deterministic Random Differential Input Voltage Swing Differential Output Voltage Swing SD Assert Time SD De-assert Time Low SD Assert Level Low SD De-assert Level Low SD/LOS Hysteresis Medium SD Assert Level Medium SD De-assert Level Medium SD/LOS Hysteresis High SD Assert Level High SD De-assert Level High SD/LOS Hysteresis 3dB Bandwidth Differential Voltage Gain Single-ended Small-Signal Gain Note 5 Note 6 Figure 1 VID > 12mVPP, Figure 1 RSDLVL = 15kΩ, Note 8 RSDLVL = 15kΩ, Note 8 RSDLVL = 15kΩ, Note 7 RSDLVL = 5kΩ, Note 8 RSDLVL = 5kΩ, Note 8 RSDLVL = 5kΩ, Note 7 RSDLVL = 100Ω, Note 8 RSDLVL = 100Ω, Note 8 RSDLVL = 100Ω, Note 7 15 psPP 5 psRMS 5 1800 mVPP 1500 2 mVPP 10 µs 2 10 µs 27 mVPP 18 mVPP 3.4 dB 53 80 mVPP 21 36 mVPP 2 3.5 6 dB 137 200 mVPP 70 94 mVPP 2 3.5 6 dB 1.8 GHz 42 dB 30 36 dB Notes: 4. Amplifier in limiting mode. Input is a 200MHz, 100mVpp square wave. 5. Deterministic jitter measured using 3.2Gbps K28.5 pattern, VID = 10mVPP. 6. Random jitter measured using 3.2Gbps K28.7 pattern, VID = 10mVPP. 7. This specification defines electrical hysteresis as 20log (LOS De-assert/LOS Assert). The ratio between optical hysteresis and electrical hysteresis is found to vary between 1.5 and 2, depending upon the level of received optical power and ROSA characteristics. Based upon that ratio, the optical hysteresis corresponding to the electrical hysteresis range 2dB-6dB, shown in the AC characteristics table, will be 1dB-3dB Optical Hysteresis. 8. See “Typical Operating Characteristics” for a graph showing how to choose a particular RSDLVL for a particular SD assert and its associated de- assert amplitude. November 2007 5 M9999-111507-C [email protected] or (408) 955-1690 5 Page Micrel, Inc. SY88309BL MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. 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. © 2007 Micrel, Incorporated. November 2007 11 M9999-111507-C [email protected] or (408) 955-1690 11 Page

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