Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsInterface ICsInterface IC - customised WQFN 16

1 PF

37.4:

Coaxial Cable

75:

LMH0074 Adaptive

Cable Equalizer

SDI

SDO

SDI

AEC+

AEC-

SDO

MUTE

REF

MUTE

BYPASS

4.7 PF

Outputs

MUTE

REF

MUTE

BYPASS

1 PF

75:

6.8 nH

LMH0074

www.ti.com

SNLS277D –AUGUST 2007–REVISED APRIL 2013

LMH0074 SMPTE 259M / 344M Adaptive Cable Equalizer

Check for Samples: LMH0074

FEATURES

DESCRIPTION

The LMH0074 SMPTE 259M / 344M Adaptive Cable

• SMPTE 259M and SMPTE 344M Compliant

Equalizer is designed to equalize data transmitted

• Supports DVB-ASI at 270 Mbps

over cable (or any media with similar dispersive loss

• Data Rates: 125 Mbps to 540 Mbps

characteristics). The equalizer operates over a wide

range of data rates from 125 Mbps to 540 Mbps and

• Equalizes up to 400 Meters of Belden 1694A at

supports SMPTE 259M and SMPTE 344M.

270 Mbps

The LMH0074 implements DC restoration to correctly

• Manual Bypass and Output Mute with a

handle pathological data conditions. The equalizer

Programmable Threshold

may be driven in either a single ended or differential

• Single-Ended or Differential Input

configuration.

• 50Ω Differential Outputs

Additional features include separate carrier detect

• Single 3.3V Supply Operation

and output mute pins which may be tied together to

• Industrial Temperature Range: −40°C to +85°C

mute the output when no signal is present. A

programmable mute reference is provided to mute the

• 208mW Typical Power Consumption with 3.3V

output at a selectable level of signal degradation.

Supply

• Footprint Compatible with the LMH0044 and

the GS9074A

APPLICATIONS

• SMPTE 259M and SMPTE 344M Serial Digital

Interfaces

• Serial Digital Data Equalization and Reception

• Data Recovery Equalization

Typical Application

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.

2All 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.

Summary of content (13 pages)

PAGE 1
LMH0074 www.ti.com SNLS277D – AUGUST 2007 – REVISED APRIL 2013 LMH0074 SMPTE 259M / 344M Adaptive Cable Equalizer Check for Samples: LMH0074 FEATURES DESCRIPTION • • • • The LMH0074 SMPTE 259M / 344M Adaptive Cable Equalizer is designed to equalize 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 540 Mbps and supports SMPTE 259M and SMPTE 344M.
PAGE 2
LMH0074 SNLS277D – AUGUST 2007 – 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.
PAGE 3
LMH0074 www.ti.com SNLS277D – AUGUST 2007 – REVISED APRIL 2013 AC ELECTRICAL CHARACTERISTICS Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (1). Parameter BRMIN Minimum Input Data Rate BRMAX Maximum Input Data Rate Jitter for various Cable Lengths (with equalizer pathological) tr,tf Output Rise Time, Fall Time Test Conditions Reference Min SDI, SDI Typ Max Units 125 Mbps 540 Mbps 270 Mbps, Belden 1694A, 400 meters (2) 0.
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LMH0074 SNLS277D – AUGUST 2007 – REVISED APRIL 2013 www.ti.com SDI 3 VEE 4 CD MUTE VCC 13 LMH0074 (top view) 5 6 7 8 MUTEREF 2 14 BYPASS SDI 15 AEC- 1 16 AEC+ VEE VCC CONNECTION DIAGRAM 12 VEE 11 SDO 10 SDO 9 VEE Figure 1. 16-Pin WQFN Package See Package Number RUM0016A Pin Descriptions Pin 4 Name Description 1 VEE Negative power supply (ground). 2 SDI Serial data true input. 3 SDI Serial data complement input. 4 VEE Negative power supply (ground).
PAGE 5
LMH0074 www.ti.com SNLS277D – AUGUST 2007 – REVISED APRIL 2013 Block Diagram BYPASS Output Driver SDI SDI DC Restoration/ Level Control Equalizer Filter Energy Detect SDO SDO Energy Detect 6 Automatic Equalization Control Carrier Detect/ Mute CD MUTE MUTEREF AEC+ AEC- DEVICE OPERATION BLOCK DESCRIPTION The Equalizer Filter block is a multi-stage adaptive filter. If Bypass is high, the equalizer filter is disabled.
PAGE 6
LMH0074 SNLS277D – AUGUST 2007 – REVISED APRIL 2013 www.ti.com CD and MUTE may be tied together to automatically mute the output when no input signal is present. INPUT INTERFACING The LMH0074 accepts either differential or single-ended input. The input must be AC coupled. Transformer coupling is not supported. The LMH0074 correctly handles equalizer pathological signals for standard definition serial digital video, as described in SMPTE RP 178.
PAGE 7
LMH0074 www.ti.com SNLS277D – AUGUST 2007 – REVISED APRIL 2013 APPLICATION INFORMATION PCB LAYOUT RECOMMENDATIONS Refer to the following Application Note on TI's website: AN-1372, “LMH0034 PCB Layout Techniques.” The PCB layout techniques in the application note apply to the LMH0074 as well. 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.
PAGE 8
LMH0074 SNLS277D – AUGUST 2007 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision C (April 2013) to Revision D • 8 Page Changed layout of National Data Sheet to TI format ............................................................................................................
PAGE 9
PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMH0074SQ/NOPB WQFN RUM 16 LMH0074SQE/NOPB WQFN RUM LMH0074SQX/NOPB WQFN RUM SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 16 250 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 16 4500 330.0 12.4 4.3 4.3 1.3 8.0 12.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMH0074SQ/NOPB WQFN RUM 16 1000 210.0 185.0 35.0 LMH0074SQE/NOPB WQFN RUM 16 250 210.0 185.0 35.0 LMH0074SQX/NOPB WQFN RUM 16 4500 367.0 367.0 35.
PAGE 12
MECHANICAL DATA RUM0016A SQB16A (Rev A) www.ti.
PAGE 13
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.