LMH0034MAX/NOPB - NATIONAL SEMICONDUCTOR

1 PF

37.4:

Coaxial Cable

75:

LMH0034 Adaptive

Cable Equalizer

SDI SDO

SDI

AEC+

AEC-

SDO

CLI

MUTEREF

CD/MUTE

BYPASS

4.7 PF

Outputs

MUTEREF

CD/MUTE

BYPASS

1 PF

CLI

75:

6.8 nH

LMH0034

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SNLS213H –JANUARY 2006–REVISED APRIL 2013

LMH0034 SMPTE 292M / 259M Adaptive Cable Equalizer

Check for Samples: LMH0034

1FEATURES DESCRIPTION

The LMH0034 SMPTE 292M / 259M adaptive cable

2• SMPTE 292M, SMPTE 344M and SMPTE 259M equalizer is a monolithic integrated circuit for

Compliant equalizing data transmitted over cable (or any media

• Supports DVB-ASI at 270 Mbps with similar dispersive loss characteristics). The

• Data Rates: 125 Mbps to 1.485 Gbps equalizer operates over a wide range of data rates

from 125 Mbps to 1.485 Gbps and supports SMPTE

• Equalizes up to 200 Meters of Belden 1694A at 292M, SMPTE 344M and SMPTE 259M.

1.485 Gbps or up to 400 Meters of Belden

1694A at 270 Mbps The LMH0034 implements DC restoration to correctly

handle pathological data conditions. DC restoration

• Manual Bypass, Cable Length Indicator, and can be bypassed for low data rate applications. The

Output Mute with a Programmable Threshold equalizer is flexible in allowing either single-ended or

• Single-Ended or Differential Input differential input drive.

• 50ΩDifferential Outputs Additional features include a combined carrier detect

• Single 3.3V Supply Operation and output mute pin which mutes the output when no

• 208 mW Typical Power Consumption with 3.3V signal is present. A programmable mute reference is

used to mute the output at a selectable level of signal

Supply degradation. A cable length indicator is provided to

• Replaces the GS1524 and GS1524A 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

1Please 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.

2All trademarks are the property of their respective owners.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

LMH0034

SNLS213H –JANUARY 2006–REVISED APRIL 2013

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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)

Supply Voltage −0.5V to 3.6V

Input Voltage (all inputs) −0.3V to VCC+0.3V

Storage Temperature Range −65°C to +150°C

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 Reference Min Typ Max Units

VCMIN Input Common Mode Voltage SDI, SDI 1.9 V

VSDI Input Voltage Swing At LMH0034 input(3)(4) 720 800 950 mVP−P

VCMOUT Output Common Mode Voltage SDO, SDO VCC –V

VSDO/2

VSDO Output Voltage Swing 50Ωload, differential 750 mVP-P

CLI DC Voltage 0m cable(5) CLI 2.5 V

Max cable(5) 1.9 V

MUTEREF DC Voltage (floating) MUTEREF 1.3 V

MUTEREF Range 0.7 V

CD/MUTE Output Voltage Carrier not present CD/MUTE 2.6 V

Carrier present 0.4 V

CD/MUTE Input Voltage Min to mute outputs 3.0 V

Max to force outputs active 2.0 V

ICC Supply Current .(6) 63 77 mA

(1) 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.

(2) Typical values are stated for VCC = +3.3V and TA= +25°C.

(3) Specification is ensured by characterization.

(4) 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.

(5) Input signal must be present for valid CLI. Refer to Figure 2 for typical results.

(6) 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.

Product Folder Links: LMH0034

CLI

VCC

VEE

AEC+ MUTEREF

CD/MUTE

7 10

LMH0034

AEC- BYPASS

8 9

VEE

SDI

VCC

SDO

LMH0034

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SNLS213H –JANUARY 2006–REVISED APRIL 2013

AC Electrical Characteristics

Over Supply Voltage and Operating Temperature ranges, unless otherwise specified(1).

Symbol Parameter Conditions Reference Min Typ Max Units

BRMIN Minimum Input Data Rate SDI, SDI 125 Mbps

BRMAX Maximum Input Data Rate 1485 Mbps

Jitter for various cable lengths 270 Mbps, Belden 1694A, 0.2 UI

(with equalizer pathological) 400 meters(2)

270 Mbps, Belden 8281, 0.2 UI

280 meters(2)

1.485 Gbps, Belden 1694A, 0.25 UI

140 meters(2)

1.485 Gbps, Belden 8281, 0.25 UI

100 meters(2)

1.485 Gbps, Belden 1694A, 0.3 UI

200 meters(2)

tr,tfOutput Rise Time, Fall Time 20% – 80%(2) SDO, SDO 100 220 ps

Mismatch in Rise/Fall Time (2) 2 15 ps

tOS Output Overshoot (2) 1 5 %

ROUT Output Resistance single-ended(3) 50 Ω

RLIN Input Return Loss .(4) SDI, SDI 15 18-20 dB

RIN Input Resistance single-ended 1.3 kΩ

CIN Input Capacitance single-ended(3) 1 pF

(1) Typical values are stated for VCC = +3.3V and TA= +25°C.

(2) Specification is ensured by characterization.

(3) Specification is ensured by design.

(4) 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

Figure 1. 16-Pin SOIC

See D Package

Product Folder Links: LMH0034

AEC+

Equalizer

Filter

AEC-

CD/MUTE

MUTEREF

CLI

Restoration/

Level Control

Automatic

Equalization

Control

SDI

SDI SDO

SDO

BYPASS

Output

Driver

Carrier

Detect/

Mute

Energy

Detect Energy

Detect

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

Product Folder Links: LMH0034

0 50 100 150 200 250 300 350 400

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.5

2.6

CLI (V)

BELDEN 1694A CABLE LENGTH (m)

LMH0034

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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 AEC-

pins. 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.

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.

Product Folder Links: LMH0034

SUPPLY CURRENT (mA)

BELDEN 1694A CABLE LENGTH (m)

0 200100

50 150

LMH0034

SNLS213H –JANUARY 2006–REVISED APRIL 2013

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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.

Figure 3. Supply Current vs. Belden 1694A Cable Length, 1.485 Gbps

Product Folder Links: LMH0034

SUPPLY CURRENT (mA)

BELDEN 1694A CABLE LENGTH (m)

0 400200

100 300

LMH0034

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SNLS213H –JANUARY 2006–REVISED APRIL 2013

Figure 4. Supply Current vs. Belden 1694A Cable Length, 270 Mbps

Product Folder Links: LMH0034

LMH0034

SNLS213H –JANUARY 2006–REVISED APRIL 2013

www.ti.com

REVISION HISTORY

Changes from Revision G (April 2013) to Revision H Page

• Changed layout of National Data Sheet to TI format ............................................................................................................ 7

Product Folder Links: LMH0034

PACKAGE OPTION ADDENDUM

www.ti.com 11-Jan-2021

Addendum-Page 1

PACKAGING INFORMATION

Orderable Device Status

(1)

Package Type Package

Drawing Pins Package

Qty Eco Plan

(2)

Lead finish/

Ball material

(6)

MSL Peak Temp

(3)

Op Temp (°C) Device Marking

(4/5)

Samples

LMH0034MA NRND SOIC D 16 48 Non-RoHS

& Green Call TI Call TI 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 <=1000ppm threshold. Antimony trioxide based

flame retardants must also meet the <=1000ppm threshold requirement.

(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation

of the previous line and the two combined represent the entire Device Marking for that device.

(6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two

lines if the finish value exceeds the maximum column width.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

PACKAGE OPTION ADDENDUM

www.ti.com 11-Jan-2021

Addendum-Page 2

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device Package

Type Package

Drawing Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

(mm) B0

(mm) K0

(mm) P1

(mm) W

(mm) Pin1

Quadrant

LMH0034MAX/NOPB SOIC D 16 2500 330.0 16.4 6.5 10.3 2.3 8.0 16.0 Q1

PACKAGE MATERIALS INFORMATION

www.ti.com 23-Sep-2013

Pack Materials-Page 1

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

LMH0034MAX/NOPB SOIC D 16 2500 367.0 367.0 35.0

PACKAGE MATERIALS INFORMATION

www.ti.com 23-Sep-2013

Pack Materials-Page 2

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