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LMH0395

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SNLS323L –AUGUST 2010–REVISED APRIL 2013

LMH0395 3G HD/SD SDI Dual Output Low Power Extended Reach Adaptive Cable

Equalizer

Check for Samples: LMH0395

FEATURES

DESCRIPTION

The LMH0395 3 Gbps HD/SD SDI Dual Output Low

• SMPTE 424M, SMPTE 292M, SMPTE 344M,

Power Extended Reach Adaptive Cable Equalizer is

SMPTE 259M, and DVB-ASI Compliant

designed to equalize data transmitted over cable (or

• Equalized Cable Lengths (Belden 1694A):

any media with similar dispersive loss

200m at 2.97 Gbps, 220m at 1.485 Gbps, and

characteristics). The equalizer operates over a wide

400m at 270 Mbps

range of data rates from 125 Mbps to 2.97 Gbps and

supports SMPTE 424M, SMPTE 292M, SMPTE

• Ultra Low Power Consumption: 140 mW (Dual

344M, SMPTE 259M, and DVB-ASI standards.

Outputs), 115 mW (Single Output)

• Dual Differential Outputs; Second Output can The LMH0395 provides extended cable reach with

improved immunity to crosstalk and ultra low power

be Independently Powered Down

consumption. The equalizer includes active sensing

• Power Save Mode with Auto Sleep Control (17

circuitry that ensures robust performance and

mW Typical Power Consumption in Power

enhanced immunity to variations in the input signal

Save Mode)

launch amplitude. The LMH0395 offers power

• Designed for Crosstalk Immunity

management to further reduce power consumption

when no input signal is present.

• Output De-Emphasis to Compensate for FR4

Board Trace Losses

The LMH0395 has two differential serial data outputs,

increasing flexibility and eliminating the need for a

• Digital and Analog Programmable MUTE

REF

fanout buffer on the output in many applications. The

Threshold

outputs may be independently enabled and

• Optional SPI Register Access

controlled. The output drivers offer programmable de-

• Input Data Rates: 125 Mbps to 2.97 Gbps

emphasis for up to 40” of FR4 trace losses.

• Internally Terminated 100Ω LVDS Outputs with

The LMH0395 supports two modes of operation. In

Programmable Output Common Mode Voltage

pin mode, the LMH0395 operates with control pins to

and Swing

set its operating state. In SPI mode, an optional SPI

serial interface can be used to access and configure

• Programmable Launch Amplitude Optimization

multiple LMH0395 devices in a daisy-chain

• Cable Length Indicator

configuration. This allows programming the output

• Single 2.5V Supply Operation

common mode voltage and swing, output de-

• 24-Pin WQFN Package

emphasis level, input launch amplitude, and power

management settings, as well as access to a cable

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

length indicator and all pin mode features.

APPLICATIONS

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

SMPTE 259M Serial Digital Interfaces

• Broadcast Video Routers, Switchers, and

Distribution Amplifiers

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 (26 pages)

PAGE 1
LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 LMH0395 3G HD/SD SDI Dual Output Low Power Extended Reach Adaptive Cable Equalizer Check for Samples: LMH0395 FEATURES DESCRIPTION • The LMH0395 3 Gbps HD/SD SDI Dual Output Low Power Extended Reach 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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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com Typical Application (Pin Mode) LMH0395 3G SDI Adaptive Cable Equalizer Coaxial Cable 1.0 PF 75: LMH0341 3G SDI Deserializer SDO0 SDI RXIN0 RXIN0 SDO0 SDI 5.6 nH TXOUT TXOUT Reclocked Loopthrough RX[4:0] 1.0 PF MUTEREF 49.
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LMH0395 SCK 23 22 21 MISO MOSI 24 VCC VEE SNLS323L – AUGUST 2010 – REVISED APRIL 2013 VCC www.ti.com 20 19 VEE 1 18 SDO1 VEE 2 17 SDO1 SDI 3 16 VEE SDI 4 15 SDO0 VEE 5 14 SDO0 SPI_EN 6 13 SS 9 10 AEC+ AEC- CD 11 12 VEE 8 MUTEREF 7 SDO1_DISABLE LMH0395 (top view) DAP = VEE The exposed die attach pad is a negative electrical terminal for this device. It should be connected to the negative power supply voltage. Figure 2.
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com Pin Descriptions – Pin Mode (non-SPI) / SPI_EN = GND (continued) Pin Name I/O, Type Description 19 AUTO SLEEP I, LVCMOS Auto Sleep. AUTO SLEEP has precedence over MUTE and BYPASS. This pin has an internal pullup. H = When no input signal is detected, the device will power down and the outputs will be in a high impedance state. L = Device will not enter auto power down. 20 VCC Power Positive power supply (+2.5V).
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 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 3.1V −0.3V to VCC+0.
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com 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 Test Conditions Reference Min Typ 125 SDI, SDI Mbps 0.2 UI 2.97 Gbps, Belden 1694A, 100-140 meters (2) 0.3 UI 2.97 Gbps, Belden 1694A, 140-180 meters (2) 0.5 UI 2.97 Gbps, Belden 1694A, 180-200 meters 0.
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 SPI Interface AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified Parameter Test Conditions (1) .
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com SS (host) tSSSU tSSH tSSOF tSSH tSSOF tSSSU tPL tPH SCK (host) tH tSU MOSI (host) ³8x1´ 1 A6 A5 A4 A3 A2 A1 A0 ³16x1´ tOZD tOZD tODZ MISO Hi-Z (device) Hi-Z '21¶7 &$5( tOD tODZ 1 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 1 Hi-Z Figure 5.
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – 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.
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com AUTO SLEEP The auto sleep mode allows the LMH0395 to power down when no input signal is detected. If the AUTO SLEEP pin is set high, the LMH0395 goes into a deep power save mode when no signal is detected. The device powers on again once an input signal is detected. If the AUTO SLEEP pin is set low, the LMH0395 will always be on and will not enter power save mode.
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 Coaxial Cable 1.0 PF 75: SDI 100: Differential T-Line 1.0 PF 5.6 nH SDI SDO0 SDI 75: LMH0346 3G/HD/SD SDI Reclocker 100: SDI SDO0 LMH0395 49.9: SDI SDO1 100: Differential T-Line LMH0346 3G/HD/SD SDI Reclocker 100: SDI SDO1 Figure 7. DC Output Interface to LMH0346 Reclocker Coaxial Cable 75: 1.0 PF SDI SDO0 1.0 PF 5.6 nH SDI 75: 49.
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com SPI Read The SPI read is shown in Figure 5. The SPI read is 32 bits long, consisting of a 16-bit read transaction followed by a 16-bit dummy read transaction to shift out the read data on the MISO output. The first 16-bit MOSI payload consists of a “1” (read command), seven address bits, and eight “1”s which are ignored.
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LMH0395 www.ti.
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com SPI Daisy-Chain Read and Write Example The following example further clarifies LMH0395 SPI daisy-chain operation. Assume a daisy-chain of three LMH0395 devices (Device 1, Device 2, and Device 3), with Device 1 as the first device in the chain and Device 3 as the last device in the chain, as shown by the first three devices in Figure 9. Since there are three devices in the daisy-chain, each SPI transaction is 48-bits long.
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 The offset voltage is adjustable via bits [5:4] of SPI register 01h. The default value for these register bits is “10” for an output offset of 1.2V. The output common mode voltage may be adjusted in 200 mV increments, from 0.8V to 1.2V. It can be set to “11” for the maximum offset voltage. At this maximum offset voltage setting, the outputs are referenced to the positive supply and the offset voltage is around 1.35V.
PAGE 16
LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com APPLICATION INFORMATION APPLICATION CIRCUIT (SPI MODE) Figure 15 shows the application circuit for the LMH0395 in SPI mode. (Note: The application circuit shows an external capacitor connected between the AEC+ and AEC- pins as commonly configured in legacy equalizers. This capacitor is optional and not necessary for the LMH0395; the AEC+ and AEC- pins may be left unconnected with no change in performance.
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 MOSI 3.16 k: MISO 3.3V SCK Compliant SPI Host 3.16 k: 9.76 k: SS LMH0395 9.76 k: 3.16 k: 9.76 k: Figure 16. 3.3V SPI Interfacing CROSSTALK IMMUNITY Single-ended SDI signals are susceptible to crosstalk and good design practices should be employed to minimize its effects. Most crosstalk originates through capacitive coupling from adjacent signals routed closely together via traces and connectors.
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LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com SPI Registers Table 1. SPI Registers Address R/W Name 00h R/W General Control 01h R/W Output Driver Bits Default Description 7 Carrier Detect 6 Mute 0 Mute has precedence over Bypass. 0: Normal operation. 1: Outputs muted. 5 Bypass 0 0: Normal operation. 1: Equalizer bypassed. 4:3 Sleep Mode 01 Sleep mode control. Sleep has precedence over Mute and Bypass. 00: Disable sleep mode (force equalizer to stay enabled).
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 Table 1. SPI Registers (continued) Address R/W 02h R/W Name Launch Amplitude Control Bits 7 6:0 03h 04h 05h R/W R R MUTEREF Device ID Rate Indicator R Cable Length Indicator Reserved Default Description 0 Launch amplitude optimization setting. 0: Normal optimization with no external attenuation (800 mVP-P launch amplitude). 1: Optimized for 6 dB external attenuation (400 mVP-P launch amplitude).
PAGE 20
LMH0395 SNLS323L – AUGUST 2010 – REVISED APRIL 2013 www.ti.com Table 1. SPI Registers (continued) 20 Address R/W 07h R Name Launch Amplitude Indication Bits Field Default Description 7:2 Launch Amplitude Indication Indication of launch amplitude: 1% or 0.08 dB per step with 5% accuracy. 000000: Nominal -32%. ...... 011111: Nominal -1%. 100000: Nominal. 100001: Nominal +1%. ...... 111111: Nominal +31%. 1:0 Reserved Reserved.
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LMH0395 www.ti.com SNLS323L – AUGUST 2010 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision K (April 2013) to Revision L • 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 LMH0395SQ/NOPB WQFN RTW 24 LMH0395SQE/NOPB WQFN RTW LMH0395SQX/NOPB WQFN RTW 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 24 250 178.0 12.4 4.3 4.3 1.3 8.0 12.0 Q1 24 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) LMH0395SQ/NOPB WQFN RTW 24 1000 210.0 185.0 35.0 LMH0395SQE/NOPB WQFN RTW 24 250 210.0 185.0 35.0 LMH0395SQX/NOPB WQFN RTW 24 4500 367.0 367.0 35.
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MECHANICAL DATA RTW0024A SQA24A (Rev B) www.ti.
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