DS15EA101 0.15 to 1.5 Gbps Adaptive Cable Equalizer with LOS Detection General Description Features The DS15EA101 is an adaptive equalizer optimized for equalizing data transmitted over copper cables. The DS15EA101 operates over a wide range of data rates from 150 Mbps to 1.5+ Gbps and automatically adapts to equalize any cable length from zero meters to lengths that attenuate the signal by 35 dB at 750 MHz. The DS15EA101 allows either single-ended or differential input drive. This enables equalization of coaxial cables as well as differential twin-ax and twisted pair cables. Additional features include an LOS output and an output enable which, when tied together, disable the output when no signal is present. The DS15EA101 is powered from a single 3.3V supply and consumes 210 mW at 1.5 Gbps. It operates over the full −40°C to +85°C industrial temperature range and is available in a space saving 4 x 4 mm LLP-16 package which allows for high density placement of components in multi-channel applications. ■ Automatic equalization of coaxial, twin-ax and twisted pair ■ ■ ■ ■ ■ ■ ■ ■ cables High data rates: 150 Mbps to 1.5+ Gbps Up to 35 dB of boost at 750 MHz LOS detection and output enable Single-ended or differential input 50Ω differential outputs Low power operation, 210 mW (typ) at 1.5 Gbps Industrial -40°C to +85°C temperature Space-saving 4 x 4 mm LLP-16 package Applications ■ ■ ■ ■ Cable extention applications Security cameras Remote LCDs and LED panels Data recovery equalization Typical Application 20201701 © 2007 National Semiconductor Corporation 202017 www.national.com DS15EA101 0.15 to 1.5 Gbps Adaptive Cable Equalizer with LOS Detection July 2007 DS15EA101 Absolute Maximum Ratings (Note 1) Supply Voltage Input Voltage (all inputs) Storage Temperature Range Junction Temperature Lead Temperature (Soldering 4 Sec) Package Thermal Resistance θJASQA16A θJC SQA16A ESD Rating (HBM) ESD Rating (MM) Recommended Operating Conditions −0.5V to 3.6V −0.3V to VCC+0.3V −65°C to +150°C +150°C Supply Voltage (VCC ) Input Coupling Capacitance Loop Capacitor (Connected between CAP+ and CAP-) Operating Free Air Temperature (TA) +260°C 3.3V ±5% 1.0 µF 1.0 µF -40°C to +85°C +42.1°C/W +8.2°C/W 8 kV 250V DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Symbol Parameter Conditions Reference VCM Input Common Mode Voltage VID Input Voltage VOS Output Common Mode Voltage VOUT Output Voltage Swing 50Ω load, differential VLOS LOS Output Voltage Valid signal not present Min IN+, INAt DS15EA101 input (Notes 4, 6) OUT+, OUT- 800 EN Input Voltage Supply Current www.national.com 950 EN (Note 7) 750 mVP-P 2.6 V 3.0 V V 63 2 mVP−P V Max to enable outputs ICC V 0.4 Min to disable outputs Units VCC – VOUT/2 Valid signal present VIN(EN) Max 1.9 720 LOS Typ 0.8 V 77 mA Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter BRIN Input Data Rate tTRJ Total Residual Jitter @ BER-12 (Note 8) Conditions Reference Min IN+, IN- 150 Typ Max Units 1500 Mbps 1.5 Gbps 25m CAT5e (Belden 1700A), (Note 3) 0.25 UI 1.0 Gbps 50m CAT5e (Belden 1700A), (Note 3) 0.25 UI 0.5 Gbps 100m CAT5e (Belden 1700A), (Note 3) 0.25 UI 1.5 Gbps 50m CAT7 (Siemon Tera), (Note 3) 0.25 UI 1.5 Gbps 75m CAT7 (Siemon Tera), (Note 3) 0.30 UI 1.0 Gbps 100m CAT7 (Siemon Tera), (Note 3) 0.40 UI 1.5 Gbps 200m Belden 9914, (Note 3) 0.25 UI tTLH Transition Time from Low to High 20% – 80%, (Note 4) 100 220 ps tTHL Transition Time from High to Low 20% – 80%, (Note 4) 100 220 ps ROUT Output Resistance 50 single-ended, (Note 5) OUT+, OUT- Ω Note 1: "Absolute Maximum Ratings" are those parameter values beyond which the life and operation of the device cannot be guaranteed. The stating herein of these maximums shall not be construed to imply that the device can or should be operated at or beyond these values. The table of "Electrical Characteristics" specifies acceptable device operating conditions. Note 2: Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated referenced to 0 volts. Note 3: Typical values are stated for VCC = +3.3V and TA = +25°C. Note 4: Specification is guaranteed by characterization. Note 5: Specification is guaranteed by design. Note 6: The maximum input voltage amplitude assumes a DC-balanced signal. Note 7: Supply current depends on the amount of cable being equalized. The current is highest for short cable and decreases as the cable length is increased. Note 8: The total residual jitter at BER-12 was calculated as DJ+14.1xRJ, where DJ is deterministic jitter and RJ is random jitter. The jitter is expressed as a portion of a unit interval (UI). One UI is a reciprocal of a bit rate (or data rate). For example, a 1.5 Gbps (gigabit per second) signal has 1 / (1.5 Gb/s) = 666.67 ps (picosecond) unit interval. A 0.25 UI jitter is equivalent to 0.25 x 666.67 ps = 166.67 ps. 3 www.national.com DS15EA101 AC Electrical Characteristics DS15EA101 Connection Diagram 20201703 16-Pad LLP Order Number DS15EA101SQ See NS Package Number SQA16A Pin Descriptions Pin # Name Description 1 GND Ground pin. 2 IN+ Non-inverting input pin. 3 IN- Inverting input pin. 4 GND Ground pin. 5 CAP+ Loop filter positive pin. 6 CAP- Loop filter negative pin. 7 GND Ground pin. 8 GND Ground pin. 9 GND Ground pin. 10 OUT- Inverting output pin. 11 OUT+ Non-inverting output pin. 12 GND Ground pin. 13 VCC Power supply pin. 14 EN Output enable pin. 15 LOS Los of signal circuitry output pin. 16 VCC Power supply pin. www.national.com 4 typical DC-coupled interface to common differential receivers and assume that the receivers have high impedance inputs. While most receivers have an input common mode voltage range that can accomodate CML signals, it is recommended to check respective receiver's datasheet prior to implementing the suggested interface implementations. INPUT INTERFACING The DS15EA101 accepts either differential or single-ended input. The input must be AC coupled. Transformer coupling is not supported. If the signal is differential, its amplitude must be 800 mVp-p ±10% (400 mV single-ended). If the signal is single-ended, its amplitude must be 800 mV ±10%. OUTPUT INTERFACING The DS15EA101 uses current mode outputs. They are internally terminated with 50Ω. The following two figures illustrate 20201707 Typical DS15EA101 Output DC-Coupled Interface to an LVDS Receiver 20201708 Typical DS15EA101 Output DC-Coupled Interface to a CML Receiver 5 www.national.com DS15EA101 Device Operation DS15EA101 (i.e. CAT5e/6/7 and twinax) and 50Ω coaxial cables. Setting correct DS15BA101 output amplitude and proper cable termination are keys for optimal operation. The following two figures show recommended chipset configuration for 100Ω differential and 50Ω coaxial cables. CABLE EXTENDER APPLICATION The DS15EA101 together with the DS15BA101 form a cable extender chipset optimized for extending serial data streams from serializer/deserializer (SerDes) pairs and field programmable gate arrays (FPGAs) over 100Ω differential 20201705 Cable Extender Chipset Connection Diagram for 100Ω Differential Cables 20201706 Cable Extender Chipset Connection Diagram for 50Ω Coaxial Cables REFERENCE DESIGN There is a complete reference design (P/N: DriveCable02EVK) available for evaluation of the cable extender chipset (DS15BA101 and DS15EA101). Fore more information visit http://www.national.com/appinfo/lvds/drivecable02evk.html. www.national.com 6 DS15EA101 Typical Performance 20201710 20201714 Maximum Data Rate as a Function of CAT7 (Siemon CAT7 Tera) Length Residual Jitter as a Function of Data Rate and Temperature for the Chipset with 50m CAT5e 20201711 20201715 Maximum Data Rate as a Function of CAT5e (Belden 1700A) Length Residual Jitter as a Function of Data Rate and Temperature for the Chipset with 75m CAT5e 20201712 20201716 Maximum Data Rate as a Function of 50Ω Coaxial (Belden 9914) Length Residual Jitter as a Function of Data Rate and Temperature for the Chipset with 100m CAT5e 7 www.national.com DS15EA101 20201721 20201720 An Equalized 1.5 Gbps NRZ PRBS-7 After 25m CAT5e V:100 mV / DIV, H:100 ps / DIV A 1.5 Gbps NRZ PRBS-7 After 25m CAT5e V:100 mV / DIV, H:100 ps / DIV 20201723 20201722 An Equalized 1.0 Gbps NRZ PRBS-7 After 50m CAT5e V:100 mV / DIV, H:150 ps / DIV A 1.0 Gbps NRZ PRBS-7 After 50m CAT5e V:100 mV / DIV, H:150 ps / DIV 20201725 20201724 An Equalized 0.5 Gbps NRZ PRBS-7 After 100m CAT5e V:100 mV / DIV, H:400 ps / DIV A 0.5 Gbps NRZ PRBS-7 After 100m CAT5e V:100 mV / DIV, H:400 ps / DIV www.national.com 8 DS15EA101 20201726 20201727 A 1.5 Gbps NRZ PRBS-7 After 50m CAT7 V:100 mV / DIV, H:100 ps / DIV An Equalized 1.5 Gbps NRZ PRBS-7 After 50m CAT7 V:100 mV / DIV, H:100 ps / DIV 20201728 20201729 A 1.5 Gbps NRZ PRBS-7 After 75m CAT7 V:100 mV / DIV, H:100 ps / DIV An Equalized 1.5 Gbps NRZ PRBS-7 After 75m CAT7 V:100 mV / DIV, H:100 ps / DIV 20201730 20201731 A 1.0 Gbps NRZ PRBS-7 After 100m CAT7 V:100 mV / DIV, H:150 ps / DIV An Equalized 1.0 Gbps NRZ PRBS-7 After 100m CAT7 V:100 mV / DIV, H:150 ps / DIV 9 www.national.com DS15EA101 20201732 20201733 A 1.5 Gbps NRZ PRBS-7 After 200m Belden 9914 V:100 mV / DIV, H:100 ps / DIV www.national.com An Equalized 1.5 Gbps NRZ PRBS-7 After 200m Belden 9914, V:100 mV / DIV, H:100 ps / DIV 10 DS15EA101 Physical Dimensions inches (millimeters) unless otherwise noted 16-Pin LLP Order Number DS15EA101SQ NS Package Number SQA16A (See AN-1187 for PCB Design and Assembly Recommendations) 11 www.national.com DS15EA101 0.15 to 1.5 Gbps Adaptive Cable Equalizer with LOS Detection Notes THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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