LMH0034MA/NOPB

LMH0034 www.ti.com SNLS213H – JANUARY 2006 – REVISED APRIL 2013 LMH0034 SMPTE 292M / 259M Adaptive Cable Equalizer Check for Samples: LMH0034 FEATURES DESCRIPTION • The LMH0034 SMPTE 292M / 259M 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 125 Mbps to 1.485 Gbps and supports SMPTE 292M, SMPTE 344M and SMPTE 259M. 1 2 • • • • • • • • • SMPTE 292M, SMPTE 344M and SMPTE 259M Compliant Supports DVB-ASI at 270 Mbps Data Rates: 125 Mbps to 1.485 Gbps Equalizes up to 200 Meters of Belden 1694A at 1.485 Gbps or up to 400 Meters of Belden 1694A at 270 Mbps Manual Bypass, Cable Length Indicator, and Output Mute with a Programmable Threshold Single-Ended or Differential Input 50Ω Differential Outputs Single 3.3V Supply Operation 208 mW Typical Power Consumption with 3.3V Supply Replaces the GS1524 and GS1524A The LMH0034 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 combined carrier detect and output mute pin which mutes the output when no signal is present. A programmable mute reference is used to mute the output at a selectable level of signal degradation. A cable length indicator is provided to determine the amount of cable being equalized. APPLICATIONS • • • SMPTE 292M, SMPTE 344M, and SMPTE 259M Serial Digital Interfaces Serial Digital Data Equalization and Reception Data Recovery Equalization Typical Application 6.8 nH LMH0034 Adaptive Cable Equalizer Coaxial Cable 1 PF 4.7 PF SDI SDO SDI SDO 75: Outputs 75: 4.7 PF 1 PF 37.4: CD/MUTE CD/MUTE CLI MUTEREF AEC+ AECBYPASS 1 PF CLI MUTEREF BYPASS 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2006–2013, Texas Instruments Incorporated LMH0034 SNLS213H – JANUARY 2006 – REVISED APRIL 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) −0.5V to 3.6V Supply Voltage −0.3V to VCC+0.3V Input Voltage (all inputs) −65°C to +150°C Storage Temperature Range Junction Temperature +150°C Lead Temperature (Soldering 4 Sec) +260°C Package Thermal Resistance θJA 16-pin SOIC +115°C/W θJC 16-pin SOIC +105°C/W ESD Rating (HBM) 8 kV ESD Rating (MM) 250V (1) Absolute Maximum Ratings are those parameter values beyond which the life and operation of the device cannot be ensured. 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. Recommended Operating Conditions Supply Voltage (VCC – VEE) 3.3V ±5% Input Coupling Capacitance 1.0 µF AEC Capacitor (Connected between AEC+ and AEC-) 1.0 µF Operating Free Air Temperature (TA) 0°C to +85°C DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (1) (2). Symbol Parameter Conditions VCMIN Input Common Mode Voltage VSDI Input Voltage Swing VCMOUT Output Common Mode Voltage VSDO Output Voltage Swing 50Ω load, differential CLI DC Voltage 0m cable (5) Reference Min Typ 720 800 SDI, SDI At LMH0034 input (3) (4) CLI Max cable (5) MUTEREF MUTEREF Range CD/MUTE Output Voltage Carrier not present CD/MUTE Min to mute outputs ICC (1) (2) (3) (4) (5) (6) 2 Supply Current . mVP−P V V 750 mVP-P 2.5 V 1.9 V 1.3 V 0.7 V 2.6 V 0.4 3.0 V V Max to force outputs active (6) 950 VCC – VSDO/2 Carrier present CD/MUTE Input Voltage Units 1.9 SDO, SDO MUTEREF DC Voltage (floating) Max 63 2.0 V 77 mA 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. Typical values are stated for VCC = +3.3V and TA = +25°C. Specification is ensured by characterization. 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. Input signal must be present for valid CLI. Refer to Figure 2 for typical results. 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 3 and Figure 4. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 LMH0034 www.ti.com SNLS213H – JANUARY 2006 – REVISED APRIL 2013 AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (1). Symbol Parameter BRMIN Minimum Input Data Rate BRMAX Maximum Input Data Rate Jitter for various cable lengths (with equalizer pathological) tr,tf tOS Conditions Typ Max 125 Units Mbps 1485 Mbps 270 Mbps, Belden 1694A, 400 meters (2) 0.2 UI 270 Mbps, Belden 8281, 280 meters (2) 0.2 UI 1.485 Gbps, Belden 1694A, 140 meters (2) 0.25 UI 1.485 Gbps, Belden 8281, 100 meters (2) 0.25 UI 1.485 Gbps, Belden 1694A, 200 meters (2) 0.3 UI Output Rise Time, Fall Time 20% – 80% (2) 100 220 ps Mismatch in Rise/Fall Time (2) 2 15 ps Output Overshoot (2) 1 5 % Output Resistance single-ended RLIN Input Return Loss . (4) RIN Input Resistance single-ended (1) (2) (3) (4) Min SDI, SDI ROUT CIN Reference Input Capacitance SDO, SDO (3) SDI, SDI single-ended (3) 15 50 Ω 18-20 dB 1.3 kΩ 1 pF Typical values are stated for VCC = +3.3V and TA = +25°C. Specification is ensured by characterization. Specification is ensured by design. Input return loss is dependent on board design. The LMH0034 meets this specification on the SD034 evaluation board from 5MHz to 1.5GHz. Connection Diagram 2 3 4 5 6 7 8 CLI CD/MUTE VCC VCC VEE SDI SDI VEE LMH0034 1 VEE SDO SDO VEE AEC+ MUTEREF AEC- BYPASS 16 15 14 13 12 11 10 9 Figure 1. 16-Pin SOIC See D Package Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 3 LMH0034 SNLS213H – JANUARY 2006 – REVISED APRIL 2013 www.ti.com PIN DESCRIPTIONS Pin # Name Description 1 CLI Cable length indicator. Provides a voltage inversely proportional to the cable length being equalized. 2 VCC Positive power supply (+3.3V). 3 VEE Negative power supply (ground). 4 SDI Serial data true input. 5 SDI Serial data complement input. 6 VEE Negative power supply (ground). 7 AEC+ AEC loop filter external capacitor (1µF) positive connection. 8 AEC- AEC loop filter external capacitor (1µF) negative connection. 9 BYPASS Bypasses equalization and DC restoration when high. No equalization occurs in this mode. 10 MUTEREF Mute reference. Determines the maximum cable to be equalized before muting. May be unconnected for maximum equalization. 11 VEE Negative power supply (ground). 12 SDO Serial data complement output. 13 SDO Serial data true output. 14 VEE Negative power supply (ground). 15 VCC Positive power supply (+3.3V). 16 CD/MUTE Bi-directional carrier detect and output mute. CD/MUTE is high when no signal is present. If unconnected, MUTE is controlled automatically by carrier detect. To force MUTE on, tie to VCC. To disable MUTE, tie to GND. CD/MUTE has no function in BYPASS mode. Block Diagram BYPASS Output Driver SDI SDI DC Restoration/ Level Control Equalizer Filter Energy Detect SDO SDO Energy Detect 6 CLI Automatic Equalization Control AEC+ 4 Carrier Detect/ Mute CD/MUTE MUTEREF AEC- Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 LMH0034 www.ti.com SNLS213H – JANUARY 2006 – REVISED APRIL 2013 DEVICE OPERATION BLOCK DESCRIPTION The Equalizer Filter block is a multi-stage adaptive filter. If Bypass is high, the equalizer filter is disabled. The DC Restoration / Level Control block receives the differential signals from the equalizer filter block. This block incorporates a self-biasing DC restoration circuit to fully DC restore the signals. If Bypass is high, this function is disabled. The signals before and after the DC Restoration / Level Control block are used to generate the Automatic Equalization Control (AEC) signal. This control signal sets the gain and bandwidth of the equalizer filter. The loop response in the AEC block is controlled by an external 1µF capacitor placed across the AEC+ and AECpins. Cable Length Indicator (CLI) is derived from this block. The Carrier Detect / Mute block generates the carrier detect signal and controls the mute function of the output. This block utilizes the bi-directional CD/MUTE signal along with Mute Reference (MUTEREF). The Output Driver produces SDO and SDO. CABLE LENGTH INDICATOR (CLI) The cable length indicator provides a voltage to indicate the length of cable being equalized. The CLI voltage decreases as the cable length increases. Figure 2 shows the typical CLI voltage vs. Belden 1694A cable length. Note: CLI is only valid when an input signal is present. 2.6 2.5 CLI (V) 2.4 2.3 2.2 2.1 2.0 1.9 1.8 0 50 100 150 200 250 300 350 400 BELDEN 1694A CABLE LENGTH (m) Figure 2. CLI vs. Belden 1694A Cable Length MUTE REFERENCE (MUTEREF) The mute reference determines the amount of cable to equalize before automatically muting the outputs. This is set by applying a voltage inversely proportional to the length of cable to equalize. As the applied MUTEREF voltage is increased, the amount of cable that can be equalized before carrier detect is de-asserted and the outputs are muted is decreased. MUTEREF may be left unconnected for maximum equalization before muting. CARRIER DETECT / MUTE (CD/MUTE) Carrier Detect / Mute is bi-directional, serving as both a carrier detect (output function) and mute (input function). When used as an output, CD/MUTE determines if a valid signal is present at the LMH0034 input. If MUTEREF is used, the carrier detect threshold will be altered accordingly. CD/MUTE provides a high voltage when no signal is present at the LMH0034 input, and the outputs are automatically muted. CD/MUTE is low when a valid input signal has been detected, and the outputs are automatically enabled. As an input, CD/MUTE can be used to override the carrier detect and manually mute or enable the LMH0034 outputs. Applying a high input to CD/MUTE will mute the LMH0034 outputs. Applying a low input will force the outputs to be active regardless of the length of cable or the state of MUTEREF. Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 5 LMH0034 SNLS213H – JANUARY 2006 – REVISED APRIL 2013 www.ti.com INPUT INTERFACING The LMH0034 accepts either differential or single-ended input. The input must be AC coupled. Transformer coupling is not supported. The LMH0034 correctly handles equalizer pathological signals for standard definition and high definition serial digital video, as described in SMPTE RP 178 and RP 198, respectively. OUTPUT INTERFACING The SDO and SDO outputs are internally loaded with 50Ω. They produce a 750 mVP-P differential output, or a 375 mVP-P single-ended output. APPLICATION INFORMATION PCB LAYOUT RECOMMENDATIONS Please refer to the following Application Note: AN-1372 (SNLA071) “LMH0034 PCB Layout Techniques.” REPLACING THE GENNUM GS1524 The LMH0034 is form-fit-function compatible with the Gennum GS1524 and GS1524A. SUPPLY CURRENT VS. CABLE LENGTH The supply current (ICC) depends on the amount of cable being equalized. The current is highest for short cable and decreases as the cable length is increased. Figure 3 shows supply current vs. Belden 1694A cable length for 1.485 Gbps data and Figure 4 shows supply current vs. Belden 1694A cable length for 270 Mbps data. SUPPLY CURRENT (mA) 75 70 65 60 55 0 50 100 150 200 BELDEN 1694A CABLE LENGTH (m) Figure 3. Supply Current vs. Belden 1694A Cable Length, 1.485 Gbps 6 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 LMH0034 www.ti.com SNLS213H – JANUARY 2006 – REVISED APRIL 2013 SUPPLY CURRENT (mA) 75 70 65 60 55 0 100 200 300 400 BELDEN 1694A CABLE LENGTH (m) Figure 4. Supply Current vs. Belden 1694A Cable Length, 270 Mbps Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 7 LMH0034 SNLS213H – JANUARY 2006 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision G (April 2013) to Revision H • 8 Page Changed layout of National Data Sheet to TI format ............................................................................................................ 7 Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Product Folder Links: LMH0034 PACKAGE OPTION ADDENDUM www.ti.com 30-Sep-2021 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) LMH0034MA NRND SOIC D 16 48 Non-RoHS & Green Call TI Level-1-235C-UNLIM 0 to 85 L034 LMH0034MA/NOPB ACTIVE SOIC D 16 48 RoHS & Green Call TI | SN Level-1-260C-UNLIM 0 to 85 L034 LMH0034MAX/NOPB ACTIVE SOIC D 16 2500 RoHS & Green SN Level-1-260C-UNLIM 0 to 85 L034 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of