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LMH0024 Dataheets PDF



Part Number LMH0024
Manufacturers National Semiconductor
Logo National Semiconductor
Description Adaptive Cable Equalizer
Datasheet LMH0024 DatasheetLMH0024 Datasheet (PDF)

www.DataSheet4U.com LMH0024 SMPTE 259M / 344M Adaptive Cable Equalizer PRELIMINARY February 2006 LMH0024 3.3V SMPTE 259M / 344M Adaptive Cable Equalizer General Description The LMH0024 SMPTE 259M / 344M adaptive cable equalizer is a monolithic integrated circuit for equalizing data transmitted over cable (or any media with similar dispersive loss characteristics). The equalizer operates over a wide range of data rates from 143 Mbps to 540 Mbps and supports SMPTE 259M and SMPTE 344M. The LMH00.

  LMH0024   LMH0024


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www.DataSheet4U.com LMH0024 SMPTE 259M / 344M Adaptive Cable Equalizer PRELIMINARY February 2006 LMH0024 3.3V SMPTE 259M / 344M Adaptive Cable Equalizer General Description The LMH0024 SMPTE 259M / 344M adaptive cable equalizer is a monolithic integrated circuit for equalizing data transmitted over cable (or any media with similar dispersive loss characteristics). The equalizer operates over a wide range of data rates from 143 Mbps to 540 Mbps and supports SMPTE 259M and SMPTE 344M. The LMH0024 implements DC restoration to correctly handle pathological data conditions. DC restoration can be bypassed for low data rate applications. The equalizer is flexible in allowing either single-ended or differential input drive. Additional features include a mute pin which can be used to manually mute the output and a cable length indicator which determines the amount of cable being equalized. Features n n n n n n n n n n n SMPTE 259M and SMPTE 344M compliant Supports DVB-ASI at 270 Mbps Data rates: 143 Mbps to 540 Mbps Equalizes up to 350 meters of Belden 1694A at 270 Mbps Manual bypass, cable length indicator, and output mute Single-ended or differential input 50Ω differential outputs Single 3.3V supply operation Industrial temperature range: −40˚C to +85˚C 198mW typical power consumption with 3.3V supply Footprint compatible with the LMH0034 and the GS9064 Applications n SMPTE 259M and SMPTE 344M serial digital interfaces n Serial digital data equalization and reception n Data recovery equalization Typical Application 20172501 © 2006 National Semiconductor Corporation DS201725 www.national.com LMH0024 Absolute Maximum Ratings (Note 1) Supply Voltage Input Voltage (all inputs) Storage Temperature Range Junction Temperature Lead Temperature (Soldering 4 Sec) Package Thermal Resistance θJA 16-pin SOIC θJC 16-pin SOIC ESD Rating (HBM) ESD Rating (MM) −0.5V to 3.6V −0.3V to VCC+0.3V −65˚C to +150˚C +150˚C +260˚C +115˚C/W +105˚C/W 8kV 250V Recommended Operating Conditions Supply Voltage (VCC – VEE) Input Coupling Capacitance AEC Capacitor (Connected between AEC+ and AEC-) Operating Free Air Temperature (TA) 3.3V ± 5% 1.0 µF 1.0 µF −40˚C to +85˚C DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Symbol Parameter VCMIN VSDI Input Common Mode Voltage Input Voltage Swing At LMH0024 input, (Notes 4, 6) SDO, SDO 50Ω load, differential 0m cable no signal MUTE Input Voltage ICC Supply Current Min to mute outputs Max to force outputs active (Note 7) 60 MUTE 3.0 2.0 77 CLI Conditions Reference SDI, SDI 720 Min Typ 1.9 800 VCC – VSDO/2 750 2.5 1.2 950 Max Units V mVP−P V mVP-P V V V V mA VCMOUT Output Common Mode Voltage VSDO Output Voltage Swing CLI DC Voltage www.national.com 2 LMH0024 AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol Parameter BRSDI Input Data Rate Maximum Equalized Cable Length (with equalizer pathological) 270 Mbps, Belden 1694A, 0.2UI output jitter, (Note 4) 270 Mbps, Belden 8281, 0.2UI output jitter, (Note 4) 540 Mbps, Belden 1694A, 0.2UI output jitter, (Note 4) 540 Mbps, Belden 8281, 0.2UI output jitter, (Note 4) tr,tf tOS ROUT RLIN RIN CIN Output Rise Time, Fall Time Mismatch in Rise/Fall Time Output Overshoot Output Resistance Input Return Loss Input Resistance Input Capacitance 20% – 80%, (Note 4) (Note 4) (Note 4) single-ended, (Note 5) (Note 8) single-ended single-ended, (Note 5) SDI, SDI 15 SDO, SDO Conditions Reference SDI, SDI Min 143 350 280 250 180 100 2 1 50 18-20 1.3 1 220 15 5 Typ Max 540 Units Mbps m m m m ps ps % Ω dB kΩ pF 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 VEE = 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 swing assumes a nonstressing, DC-balance signal; specifically, the SMPTE-recommended color bar test signal. Pathological or other stressing signals may not be used. This specification is for 0m cable only. 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. Refer to Figure 1. Note 8: Input return loss is dependent on board design. The LMH0024 meets this specification on the SD034 evaluation board from 5MHz to 1.5GHz. 3 www.national.com LMH0024 Connection Diagram 20172503 .


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