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LMH0384

www.ti.com

SNLS308F –APRIL 2009–REVISED APRIL 2013

3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

Check for Samples: LMH0384

FEATURES

DESCRIPTION

The LMH0384 3 Gbps HD/SD SDI Extended Reach

• SMPTE 424M, SMPTE 292M, SMPTE 344M, and

and Configurable Adaptive Cable Equalizer is

SMPTE 259M Compliant

designed to equalize data transmitted over cable (or

• Supports DVB-ASI at 270 Mbps

any media with similar dispersive loss

• Wide Range of Data Rates: 125 Mbps to 2.97

characteristics). The equalizer operates over a wide

range of data rates from 125 Mbps to 2.97 Gbps and

Gbps

supports SMPTE 424M, SMPTE 292M, SMPTE

• Equalizes up to 140 Meters of Belden 1694A at

344M, and SMPTE 259M standards.

2.97 Gbps, up to 200 Meters of Belden 1694A

at 1.485 Gbps, or up to 400 Meters of Belden The LMH0384 includes active sensing features and

design enhancements including longer cable

1694A at 270 Mbps

equalization, lower output jitter, configurable pin

• Power Save Mode With Auto Sleep Control

mode and SPI modes, a power-saving sleep mode,

(35 mW Typical Power Consumption in Power

and programmable output common mode voltage and

Save Mode)

swing. The LMH0384 implements DC restoration to

• Optional SPI Register Access

correctly handle pathological data conditions.

• Manual Bypass and Output Mute With a

The LMH0384 includes an auto sleep mode to power

Programmable Threshold

down the device when no input signal is detected.

Other features include separate carrier detect and

• Internally Terminated 100Ω LVDS Outputs With

output mute pins which may be tied together to mute

SPI Programmable Output Common Mode

the output when no input signal is present, and a

Voltage and Swing

programmable mute reference which may be used to

• Programmable Launch Amplitude Optimization

mute the output at a selectable level of signal

in SPI Mode

degradation.

• Cable Length Indicator in SPI Mode

The LMH0384 supports two modes of operation. In

• Single 3.3V Supply Operation

pin mode (non-SPI mode) the LMH0384 is footprint

compatible with the LMH0344 and legacy SDI

• 16-Pin WQFN Package

equalizers. In the optional SPI mode, the LMH0384

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

provides register access to all of its features along

• Footprint Compatible With the LMH0344,

with a cable length indicator, programmable output

LMH0044, and LMH0074 in Pin Mode

common mode voltage and swing, and launch

amplitude optimization.

APPLICATIONS

The device is available in a 16-pin WQFN package.

• SMPTE 424M, SMPTE 292M, SMPTE 344M, and

SMPTE 259M Serial Digital Interfaces

• Serial Digital Data Equalization and Reception

• Data Recovery Equalization

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 (21 pages)

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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer Check for Samples: LMH0384 FEATURES DESCRIPTION • The LMH0384 3 Gbps HD/SD SDI Extended Reach and Configurable 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 2.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com Typical Application (Pin Mode) LMH0384 3G SDI Adaptive Cable Equalizer Coaxial Cable 75: LMH0341 3G SDI Deserializer 1.0 PF SDO SDI SDI TXOUT TXOUT Reclocked Loopthrough SDO 1.0 PF MUTE 75: RX[4:0] MUTEREF 37.4: AEC+ CD BYPASS AUTO SLEEP SPI_EN MUTE To FPGA RXCLK 5-bit LVDS + clk AEC- 5.6 nH RXIN0 RXIN0 MUTEREF CD BYPASS AUTO SLEEP 1.0 PF These devices have limited built-in ESD protection.
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LMH0384 www.ti.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified Symbol Parameter BRMIN Minimum Input Data Rate BRMAX Maximum Input Data Rate Conditions (1) . Reference Min SDI, SDI Typ 125 Jitter for Various Cable Lengths 270 Mbps, Belden 1694A, 0-350 meters (2) 270 Mbps, Belden 1694A, 350-400 meters tOS RLIN 0.2 UI UI 0.35 SDO, SDO UI UI 0.3 2.
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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 TIMING DIAGRAMS VODVOS VOD+ 80% 80% + VOD VSSP-P 0V differential 20% - VOD 20% VSSP-P = (VOD+) – (VOD-) tr tf Figure 1. LVDS Output Voltage, Offset, and Timing Parameters SS (host) tSSSU tPH tPL tSSH SCK (host) tH tSU MOSI (host) MISO (device) tSSOF 0 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 Hi-Z Figure 2.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com CONNECTION DIAGRAM SDI 3 SPI_EN 4 VCC LMH0384 (top view) 5 6 7 8 MUTEREF 2 13 BYPASS SDI 14 AEC- 1 15 AEC+ VEE MUTE 16 CD VCC Pin Mode (non-SPI) / SPI_EN = GND / LMH0344 Compatible 12 AUTO SLEEP 11 SDO 10 SDO 9 VEE DAP = VEE NOTE: The exposed die attach pad is a negative electrical terminal for this device. It should be connected to the negative power supply voltage.
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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 PIN DESCRIPTIONS – Pin Mode (non-SPI) / SPI_EN = GND / LMH0344 Compatible (continued) Pin Name I/O, Type Description 5 AEC+ I/O, Analog AEC loop filter external capacitor (1µF) positive connection. 6 AEC- I/O, Analog AEC loop filter external capacitor (1µF) negative connection. 7 BYPASS I, LVCMOS Equalization bypass. This pin has an internal pulldown. H = Equalization is bypassed (no equalization occurs). L = Normal operation.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com BLOCK DIAGRAM (PIN MODE) BYPASS Output Driver SDI DC Restoration/ Level Control Equalizer Filter SDI SDO SDO MUTE Energy Detect SPI Control Energy Detect Carrier Detect SPI_EN CD 6 Automatic Equalization Control AEC+ MUTEREF MUTEREF AUTO SLEEP AEC- DEVICE OPERATION BLOCK DESCRIPTION The Equalizer Filter block is a multi-stage adaptive filter. If Bypass is high, the equalizer filter is disabled.
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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 CARRIER DETECT (CD) AND MUTE Carrier detect CD indicates if a valid signal is present at the LMH0384 input. If MUTEREF is used, the carrier detect threshold will be altered accordingly. CD provides a high voltage when no signal is present at the LMH0384 input. CD is low when a valid input signal is detected. MUTE can be used to manually mute or enable SDO and SDO.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com The LMH0384 allows flexibility when interfacing to low voltage crosspoint switches (i.e. 1.8V) and other devices with limited input ranges. The LMH0384 outputs can be DC coupled to these devices in most cases, avoiding the need to AC couple. The LMH0384 may be AC coupled to the receiving device when necessary. For example, the LMH0384 outputs are not strictly compatible with 3.3V CML and thus should not be connected via 50Ω resistors to 3.3V.
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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 OUTPUT DRIVER ADJUSTMENTS The output driver swing (amplitude) and offset voltage (common mode voltage) are adjustable via SPI register 01h. The output swing is adjustable via bits [7:5] of SPI register 01h. The default value for these register bits is “011” for a peak to peak differential output voltage of 700 mVP-P. The output swing can be adjusted in 100 mV increments from 400 mVP-P to 800 mVP-P.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com The extended 3G reach mode is accessible via bit 2 of SPI register 00h. In order to achieve longer 3G cable reach while still maintaining the performance at HD and SD data rates, a state machine can be implemented as shown in Figure 8. (Note: If this procedure is not followed, the maximum equalizable cable lengths for HD and SD data rates will be limited to less than what can be achieved in normal mode).
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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 4. Set the sleep mode to auto by writing “01” to bits [4:3] of register 00h. Alternately, sleep mode may be set to off by writing “00” to bits [4:3] of register 00h. APPLICATION INFORMATION APPLICATION CIRCUIT (SPI MODE) Figure 9 shows the application circuit for the LMH0384 in SPI mode. (SPI) MISO (SPI) SCK (SPI) MOSI VCC VCC 0.1 PF VCC 75: 13 VCC 14 SCK 15 SDO SPI_EN 5 37.4: 4 SDI MUTEREF 1.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com 4. The LMH0384 default output common mode voltage is different than that of the LMH0344. In most cases, this should not cause an issue. The LMH0384 and LMH0344 outputs can both be DC coupled to TI's SDI reclockers and cable drivers. In addition, the LMH0384 output can be DC coupled to LVDS and other inputs that require lower input common mode voltages than the LMH0344. The LMH0384 output common mode voltage is adjustable via the SPI.
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LMH0384 www.ti.com SNLS308F – APRIL 2009 – REVISED APRIL 2013 Table 1. SPI Registers (continued) Address R/W Name Bits Field 01h R/W Output Driver 7:5 Output Swing 011 Output driver swing (VSSP-P). 000: VSSP-P = 400 mVP-P. 001: VSSP-P = 500 mVP-P. 010: VSSP-P = 600 mVP-P. 011: VSSP-P = 700 mVP-P. 100: VSSP-P = 800 mVP-P. 101, 110, 111: Reserved. 4:2 Offset Voltage 001 Output driver offset voltage (common mode voltage). 000: VOS = 1.05V. 001: VOS = 1.25V. 010: VOS = 1.45V. 011: VOS = 1.65V.
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LMH0384 SNLS308F – APRIL 2009 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision E (April 2013) to Revision F • 16 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMH0384SQ/NOPB WQFN RUM 16 LMH0384SQE/NOPB WQFN RUM LMH0384SQX/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.
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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) LMH0384SQ/NOPB WQFN RUM 16 1000 213.0 191.0 55.0 LMH0384SQE/NOPB WQFN RUM 16 250 213.0 191.0 55.0 LMH0384SQX/NOPB WQFN RUM 16 4500 367.0 367.0 35.
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MECHANICAL DATA RUM0016A SQB16A (Rev A) www.ti.
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