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| VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7958 Features * 2.5Gb/s Data Rates (OC-48/SDH-16) * Input Offset Error Cancellation * Single 5V Power Supply * Fully Differential Architecture 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications General Description The Vitesse high speed limiting amplifier is intended for use as a post amplifier in wide band fiber optic links with data rates up to 2.5Gb/s. This amplifier provides very high sensitivity and broadband operation with a fully differential architecture. Additional features include on-chip, offset-correction circuitry to provide excellent pulse width distortion characteristics. VSC7958 Block Diagram VBR VSS GND VREF50 VINVIN+ 50 VREF+ Chip Boundary VOUT- A1 A2 VOUT+ - + VBF VBS G52184-0, Rev 3.0 05/14/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 1 VITESSE SEMICONDUCTOR CORPORATION 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications Table 1: Electrical Specifications Preliminary Data Sheet VSC7958 All min and max values are tested at VSS = -4.5V and -5.5V, unless otherwise noted. All min and max values are guaranteed from TCASE = 0C to 85C, unless otherwise noted. Symbol VIN (1) (1) Parameter Input Voltage Swing Input Voltage Swing Input Offset Voltage Swing Min 320 90 26 - Typ 10 500 -0.5 100 100 30 3 30 15 15 80 15 Max 800 1600 25 1200 110 45 100 - Units mVp-p mVp-p mV mVp-p V % ps dB GHz kHz dB dB mA dB Vrms C/W Conditions Single-ended source Differential source VIN = 0 Differential Output Swing. VIN = 8mV, Differential Input peak-to-peak Measured to ground 20%-80%, 25C, VIN = 50mV VIN = 4mVp-p singleended 25C, VIN = 4mVp-p 25C, VIN = 4mVp-p At 1.5GHz At 1.5GHz 8kHz to 18GHz Total single-ended output noise voltage divided by small-signal gain. 8kHz to 18GHz Junction-to-case (VIN+) - (VIN-) (VREF+) - (VREF-) (VOUT+) - (VOUT -) Output Voltage Swing VOFFSET PW% tR, tF G fMAX(1) fMIN(1) S11(1) S22(1) ISS NF(1) VNR(1) JC Output DC Offset Voltage Output Pulse Width Rise and Fall Time Small Signal Gain Small Signal -3dB Bandwidth Low Frequency -3dB Cutoff Input Return Loss Reference to 50 Output Return Loss Reference to 50 Supply Current Noise Figure Input Referred Wide Band Noise - 170 - Thermal Resistance - 30 - NOTE:(1) These values are not measured during production test. These values are results of engineering characterization. Page 2 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52184-0, Rev 3.0 05/14/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7958 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications Figure 1: Typical Output Voltage vs. Input Voltage of Limiting Amplifier Output Voltage vs. Input Voltage 1000 Single-Ended Output Voltage (mV) 100 10 1 1 13 20 100 260 500 Single-Ended Input Voltage (mV) Absolute Maximum Ratings (1) (at TA = 25C unless otherwise specified) Power Supply Voltage (VSS) ...............................................................................................................-7V to -0.5V Power Dissipation.............................................................................................................................................. 1W All Pins ................................................................................................................................................VSS to + .5V (VREF+) - (VIN+): .......................................................................................................................................... 2V (VREF-) - (VIN-): ........................................................................................................................................... 2V Storage Temperature Range (TSTG)................................................................................................ -40C to 125C Operating Temperature Range............................................................................................................0C to 100C NOTE: (1) CAUTION: Stresses listed under "Absolute Maximum Ratings" may be applied to devices one at a time without causing permanent damage. Functionality at or above the values listed is not implied. Exposure to these values for extended periods may affect device reliability. Recommended Operating Conditions Case Temperature Range (TC)..............................................................................................................0C to 85C Negative Voltage Rail (VSS) .............................................................................................................-5.5V to -4.7V Bit Rate = 2.488Gb/s NRZ and data pattern = 223 -1 PRBS, unless otherwise specified. G52184-0, Rev 3.0 05/14/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 3 VITESSE SEMICONDUCTOR CORPORATION 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications Preliminary Data Sheet VSC7958 Package Pin Descriptions Figure 2: Pin Configuration .230 GND GND VBS VBF 16 15 14 13 GND VOUT+ VOUTGND 1 2 3 4 12 VREF+ .030 VIN+ VINVREF.012 VSC7958 11 10 9 5 6 7 8 GND GND VSS VBR (TOP VIEW) .366 .050 0.005 (SIDE VIEW) *All values are typical in inches Page 4 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52184-0, Rev 3.0 05/14/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7958 Package Information 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications Figure 3: Package Dimensions E1 E D1 Key A A1 A2 D D1 E Dimension 0.054 0.003 0.050 0.366 0.225 0.366 0.225 0.020 0.030 0.012 0.013 0.013 0.020 Tolerance REF 0.003 REF 0.010 0.005 0.010 0.005 0.005 REF Typ. 0-10 0.003 0.003 D A E1 L e b A2 e R R1 Shoulder All Dimensions in inches R Sholder A1 --C-- R1 L b --C-- LEAD COPLANARITY G52184-0, Rev 3.0 05/14/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 5 VITESSE SEMICONDUCTOR CORPORATION 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications Preliminary Data Sheet VSC7958 Die Information Figure 4: Die Pad Information 1705m Pad 18 VREF_N Pad19 VDD Pad 20 VIN_N Pad 21 VDD Pad 17 VREFC_N Pad 16 VBR Pad 15 VSS_C Pad 14 VSS Pad 13 VSS Pad 12 VDD Pad 11 VDD Pad 10 Pad 9 VDD EDGE_SENSE Pad 8 VDD Pad 7 VDD Pad 15 Pad 6 GND VOUT_N Pad 5 VDD 1233m Pad 22 VDD Pad 23 VIN_P Pad 24 VDD Pad 25 VREF_P Pad 26 VREFC_P Pad 27 VBF VSC7958 Top View Pad 4 VDD Pad 3 VOUT_P Pad 2 VDD Pad 28 VBS Pad 29 VDD Pad 30 VDD Pad 31 VDD Pad 8 VDD Maximum Total Die Size: Die Thickness: Pad Size: Pad Passivation Opening: 1233m x 1705m 305m 100m x 100m 90m x 90m This device requires external components when used in die form. Please contact your Vitesse sales representative for information. Page 6 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52184-0, Rev 3.0 05/14/01 VITESSE SEMICONDUCTOR CORPORATION Preliminary Data Sheet VSC7958 Table 2: Pin Identifications Pin # 1, 4, 5, 6, 15, 16, and bottom heat spreader 2 3 7 8 9 10 11 12 13 14 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications Name GND VOUT+ VOUTVSS VBR VREFVINVIN+ VREF+ VBF VBS Function DEVICE GROUND The package bottom heat spreader should be connected to ground for the optimum thermal and electrical performance. POSITIVE DATA OUTPUT NEGATIVE DATA OUTPUT NEGATIVE DC SUPPLY DEVICE REFERENCE VOLTAGE This pin can either float or be set to an external -1.5V supply. NEGATIVE DATA INPUT REFERENCE This pin should be bypassed to ground with a 0.1F cap and a 5 series resistor. NEGATIVE DATA INPUT POSITIVE DATA INPUT POSITIVE DATA INPUT REFERENCE This pin should be bypasSed to ground with a 0.1F cap and a 5 series resistor. INTERNAL TEST POINT Do not connect. INTERNAL TEST POINT Do not connect. Ordering Information The order number for this product is formed by a combination of the device number, and package style. VSC7958 Device Type VSC7958: 2.5Gb/s Limiting Amplifier XX Package Style CC: (Metal Glass - Formed Leads) X : (Bare Die) Notice Vitesse Semiconductor Corporation ("Vitesse") provides this document for informational purposes only. This document contains pre-production information about Vitesse products in their concept, development and/or testing phase. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is subject to change without notice at any time. Nothing contained in this document shall be construed as extending any warranty or promise, express or implied, that any Vitesse product will be available as described or will be suitable for or will accomplish any particular task. Vitesse products are not intended for use in life support appliances, devices or systems. Use of a Vitesse product in such applications without written consent is prohibited. G52184-0, Rev 3.0 05/14/01 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com Page 7 VITESSE SEMICONDUCTOR CORPORATION 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications This page left intentionally blank. Preliminary Data Sheet VSC7958 Page 8 (c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com G52184-0, Rev 3.0 05/14/01 |
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