LMH0302SQE/NOPB

Sample & Buy Product Folder Support & Community Tools & Software Technical Documents Reference Design LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 LMH0302 3-Gbps HD/SD SDI Cable Driver 1 Features 3 Description • • • • • • • • • • The LMH0302 3-Gbps HD/SD SDI cable driver is designed for use in ST 424, ST 292, ST 344, and ST 259 serial digital video applications. The LMH0302 drives 75-Ω transmission lines (Belden 1694A, Belden 8281, or equivalent) at data rates up to 2.97 Gbps. 1 • • • Supports ST 424 (3G), 292 (HD), and 259 (SD) Data Rates up to 2.97 Gbps Supports DVB-ASI at 270 Mbps 100-Ω Differential Input 75-Ω Single-Ended Outputs Selectable Slew Rate Output Driver Power-Down Control Single 3.3-V Supply Operation Industrial Temperature Range: −40°C to 85°C Typical Power Consumption: 125 mW in SD Mode and 165 mW in HD Mode 16-Pin WQFN Package Footprint Compatible With the LMH0002SQ Replaces the Gennum GS2978 The LMH0302 provides two selectable slew rates for ST 259 and ST 424 or 292 compliance. The output driver may be powered down through the output driver enable pin. The LMH0302 is powered from a single 3.3-V supply. Power consumption is typically 125 mW in SD mode and 165 mW in HD mode. The LMH0302 is available in a 16-pin WQFN package. Device Information(1) PART NUMBER LMH0302 2 Applications • • • PACKAGE BODY SIZE (NOM) WQFN (16) 4.00 mm × 4.00 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. ST 424, ST 292, ST 344, and ST 259 Serial Digital Interfaces Digital Video Routers and Switches Distribution Amplifiers Typical Application VCC 0.1 PF 75: SD/HD 75: ENABLE 6.8 nH 1.0 PF 4.7 PF 49.9: ENABLE SDI SD/HD LMH0302 Differential Input 49.9: 1.0 PF SDI 75: SDO SDO 75: RREF VCC 0.1 PF 4.7 PF 6.8 nH 750: Copyright © 2016, Texas Instruments Incorporated 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 4 4 4 4 4 5 5 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information ................................................. Electrical Characteristics – DC ................................. Electrical Characteristics – AC.................................. Typical Characteristics ............................................. Detailed Description .............................................. 6 7.1 Overview .................................................................. 6 7.2 Functional Block Diagram ........................................ 6 7.3 Feature Description .................................................. 6 7.4 Device Functional Modes.......................................... 7 8 Application and Implementation .......................... 8 8.1 Application Information ............................................ 8 8.2 Typical Application ................................................... 8 9 Power Supply Recommendations...................... 10 10 Layout................................................................... 10 10.1 Layout Guidelines ................................................ 10 10.2 Layout Example ................................................... 11 11 Device and Documentation Support ................. 12 11.1 11.2 11.3 11.4 Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 12 12 12 12 12 Mechanical, Packaging, and Orderable Information ........................................................... 12 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision G (April 2013) to Revision H • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .................................................................................................. 1 Changes from Revision F (April 2013) to Revision G • 2 Page Page Changed layout of National Data Sheet to TI format ............................................................................................................. 1 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 LMH0302 www.ti.com SNLS247H – APRIL 2007 – REVISED JUNE 2016 5 Pin Configuration and Functions NC NC 13 3 10 SD/HD 4 9 7 8 NC RREF 14 SDO NC VEE NC 11 GND 6 2 15 SDO ENABLE SDI NC 12 5 1 NC SDI 16 RUM Package 16-Pin WQFN Top View VCC Not to scale Pin Functions PIN NAME NO. TYPE (1) DESCRIPTION ENABLE 6 I Output driver enable. When low, the SDO/SDO output driver is powered off. ENABLE has an internal pullup. H = Normal operation. L = Output driver powered off. EP — G EP is the exposed pad at the bottom of the WQFN package. The exposed pad must be connected to the ground plane through a via array. See Figure 6 for details. NC 5, 7, 8, 13, 14, 15, 16 — No connect. Not bonded internally. RREF 4 I Output driver level control. Connect a resistor to VCC to set output voltage swing. SD/HD 10 I Output slew rate control. Output rise/fall time complies with ST 424 or 292 when low and ST 259 when high. SDI 1 I Serial data true input. SDI 2 I Serial data complement input. SDO 12 O Serial data true output. SDO 11 O Serial data complement output. VCC 9 P Positive power supply (3.3 V). VEE 3 G Negative power supply (ground). (1) G = Ground, I = Input, O = Output, and P = Power Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 3 LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX UNIT Supply voltage –0.5 3.6 V Input voltage (all inputs) –0.3 VCC + 0.3 V Output current 28 mA Lead temperature, soldering (4 s) 260 °C 125 °C 150 °C Junction temperature, TJ Storage temperature, Tstg (1) –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 6.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) ±4500 Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) ±2000 Machine model (MM) ±250 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) Supply voltage (VCC – VEE) MIN NOM MAX 3.13 3.3 3.46 V 100 °C 85 °C Operating junction temperature Operating free air temperature, TA –40 25 UNIT 6.4 Thermal Information LMH0302 THERMAL METRIC (1) RUM (WQFN) UNIT 16 PINS RθJA Junction-to-ambient thermal resistance 47.8 °C/W RθJC(top) Junction-to-case (top) thermal resistance 47.2 °C/W RθJB Junction-to-board thermal resistance 25.6 °C/W ψJT Junction-to-top characterization parameter 1.7 °C/W ψJB Junction-to-board characterization parameter 25.7 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 14.5 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 6.5 Electrical Characteristics – DC Over supply voltage and operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCMIN Input common mode voltage SDI, SDI VSDI Input voltage swing Differential, SDI, SDI (1) (2) 4 MIN (1) (2) TYP MAX 1.1 + VSDI/2 VCC – VSDI/2 100 2200 UNIT V mVP−P 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 V. Typical values are stated for VCC = 3.3 V and TA = 25°C. Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 LMH0302 www.ti.com SNLS247H – APRIL 2007 – REVISED JUNE 2016 Electrical Characteristics – DC (continued) Over supply voltage and operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCMOUT Output common mode voltage SDO, SDO VSDO Output voltage swing Single-ended, 75-Ω load, RREF = 750 Ω 1% VIH Input voltage high level SD/HD, ENABLE VIL Input voltage low level SD/HD, ENABLE ICC Supply current (1)(2) MIN TYP MAX UNIT VCC – VSDO 720 V 800 880 mVP−P 2 V 0.8 SD/HD = 0, SDO/SDO enabled 50 59 SD/HD = 0, SDO/SDO disabled 26 33 SD/HD = 1, SDO/SDO enabled 38 48 SD/HD = 1, SDO/SDO disabled 15 22 V mA 6.6 Electrical Characteristics – AC Over supply voltage and operating free-air temperature range (unless otherwise noted) PARAMETER DRSDI Input data rate Tjit Additive jitter TEST CONDITIONS (1) MIN tr,tf Output rise time, fall time TMATCH Mismatch in rise time, fall time 2.97 Gbps, SDO, SDO 20 1.485 Gbps, SDO, SDO 18 270 Mbps, SDO, SDO 15 SD/HD = 0, 20% – 80%, SDO, SDO 90 SD/HD = 1, 20% – 80%, SDO, SDO 400 TOS Output overshoot RLSDO (1) (2) (3) Duty cycle distortion UNIT Mbps psP-P 130 800 30 SD/HD = 1, SDO, SDO 50 SD/HD = 0, 1.485 Gbps, SDO, SDO ps ps 27 (2) 30 SD/HD = 1, SDO, SDO (2) 100 SD/HD = 0, SDO, SDO (2) 10% SD/HD = 1, SDO, SDO (2) Output return loss MAX 2970 SD/HD = 0, SDO, SDO SD/HD = 0, 2.97 Gbps, SDO, SDO (2) TDCD TYP SDI, SDI ps 8% 5 MHz to 1.5 GHz, SDO, SDO (3) 15 1.5 GHz to 3.0 GHz, SDO, SDO (3) 10 dB Typical values are stated for VCC = 3.3 V and TA = 25°C. Specification is ensured by characterization. Output return loss is dependent on board design. The LMH0302 meets this specification on the SD302 evaluation board. 6.7 Typical Characteristics 172 mV/DIV 172 mV/DIV Typical device characteristics at TA = 25°C and VCC = 3.3 V (unless otherwise noted) 200 ps/DIV 100 ps/DIV Figure 1. SDO PRBS10 at 2.97 Gbps Figure 2. SDO PRBS10 at 1.485 Gbps Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 5 LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 www.ti.com 7 Detailed Description 7.1 Overview The LMH0302 ST 424, ST292, ST259 serial digital cable driver is a monolithic, high-speed cable driver designed for use in serial digital video data transmission applications. The LMH0302 drives 75-Ω transmission lines (Belden 8281, 1694A, Canare L-5CFB, or equivalent) at data rates up to 2.97 Gbps. The LMH0302 provides two selectable slew rates for ST 259 and ST 292/424 compliance. The output voltage swing is adjustable through a single external resistor ( RREF). The LMH0302 is powered from a single 3.3-V supply. Power consumption is typically 125 mW in SD mode and 165 mW in HD mode. The LMH0302 is available in a 16-pin WQFN package. 7.2 Functional Block Diagram SDO SDO SDI + + - - SDI RREF Bias Generator VCC VEE SD/HD Enable Control Copyright © 2016, Texas Instruments Incorporated 7.3 Feature Description The LMH0302 data path consists of several key blocks: • • • • Input interfacing Output interfacing Output slew rate control Output enable 7.3.1 Input Interfacing The LMH0302 accepts either differential or single-ended input. The inputs are self-biased, allowing for simple AC or DC coupling. DC-coupled inputs must be kept within the specified common-mode range. 7.3.2 Output Interfacing The LMH0302 uses current mode outputs. Single-ended output levels are 800 mVP-P into 75-Ω AC-coupled coaxial cable with an RREF resistor of 750 Ω. The RREF resistor is connected between the RREF pin and VCC. 6 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 LMH0302 www.ti.com SNLS247H – APRIL 2007 – REVISED JUNE 2016 Feature Description (continued) The RREF resistor must be placed as close as possible to the RREF pin. In addition, the copper in the plane layers below the RREF network must be removed to minimize parasitic capacitance. 7.3.3 Output Slew Rate Control The LMH0302 output rise and fall times are selectable for either ST 259, ST 424, or 292 compliance through the SD/HD pin. For slower rise and fall times, or ST 259 compliance, SD/HD is set high. For faster rise and fall times, ST 424 and ST 292 compliance, SD/HD is set low. 7.3.4 Output Enable The SDO/SDO output driver are enabled or disabled with the ENABLE pin. When set low, the output driver is powered off. ENABLE has an internal pullup. 7.4 Device Functional Modes The LMH0302 features are programmed using pin mode only. Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 7 LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 www.ti.com 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The LMH0302 is a single-channel SDI cable driver that supports different application spaces. The following sections describe the typical use cases and common implementation practices. 8.1.1 General Guidance for All Applications The SMPTE specifications define the use of AC-coupling capacitors for transporting uncompressed serial data streams with heavy low-frequency content. This specification requires the use of a 4.7-µF AC-coupling capacitor to avoid low frequency DC wander. The 75-Ω signal is also required to meet certain rise and fall timing to facilitate highest eye opening for the receiving device. SMPTE specifies the requirements for the Serial Digital Interface to transport digital video at SD, HD, 3 Gbps, and higher data rates over coaxial cables. One of the requirements is meeting the required return loss. This requirement specifies how closely the port resembles 75-Ω impedance across a specified frequency band. Output return loss is dependent on board design. The LMH0302 supports these requirements. 8.2 Typical Application VCC 0.1 PF 75: SD/HD 75: ENABLE 6.8 nH 1.0 PF 4.7 PF 49.9: ENABLE SDI SD/HD LMH0302 Differential Input 49.9: 1.0 PF SDI 75: SDO SDO 75: RREF VCC 0.1 PF 4.7 PF 6.8 nH 750: Copyright © 2016, Texas Instruments Incorporated Figure 3. Application Circuit 8 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 LMH0302 www.ti.com SNLS247H – APRIL 2007 – REVISED JUNE 2016 Typical Application (continued) 8.2.1 Design Requirements For the LMH0302 design example, Table 1 lists the design parameters. Table 1. LMH0302 Design Parameters PARAMETER REQUIREMENT Input termination Required; 49.9 Ω are recommended (see Figure 3). Output AC-coupling capacitors Required; both SDO and SDO require AC-coupling capacitors. SDO AC-coupling capacitors are expected to be 4.7 µF to comply with SMPTE wander requirement. DC power supply coupling capacitors To minimize power supply noise, place 0.1-µF capacitor as close to the device VCC pin as possible. Distance from device to BNC Keep this distance as short as possible. High speed SDI and SDI trace impedance Design differential trace impedance of SDI and SDI with 100 Ω. High speed SDO and SDO trace impedance Single-ended trace impedance for SDO and SDO with 75 Ω. 8.2.2 Detailed Design Procedure The following design procedure is recommended: 1. 2. 3. 4. 5. Select a suitable power supply voltage for the LMH0302. It can be powered from a single 3.3-V supply. Check that the power supply meets the DC requirements in Electrical Characteristics – DC. Select the proper pull-high or pull-low for SD/HD to set the slew rate. Select proper pull-high or pull-low for ENABLE to enable or disable the output driver. Choose a high-quality 75-Ω BNC that is capable to support 2.97-Gbps applications. Consult a BNC supplier regarding insertion loss, impedance specifications, and recommended BNC footprint for meeting SMPTE return loss requirements. 6. Choose small 0402 surface-mount ceramic capacitors for the AC-coupling and bypass capacitors. 7. Use proper footprint for BNC and AC-coupling capacitors. Anti-pads are commonly used in power and ground planes under these landing pads to achieve optimum return loss. 8.2.3 Application Curves 920 172 mV/DIV SDO Amplitude (mVp-p) 900 880 860 840 820 800 780 760 660 1 ns/DIV 680 700 720 740 760 RREF Resistance (Ÿ) Figure 4. SDO PRBS10 at 270 Mbps 780 C001 Figure 5. SDO Amplitude vs RREF Resistance Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 9 LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 www.ti.com 9 Power Supply Recommendations Follow these general guidelines when designing the power supply: 1. The power supply must be designed to provide the recommended operating conditions (see Recommended Operating Conditions). 2. The maximum current draw for the LMH0302 is provided in Electrical Characteristics – DC. This figure can be used to calculate the maximum current the supply must provide. 3. The LMH0302 does not require any special power supply filtering, provided the recommended operating conditions are met. Only standard supply coupling is required. 10 Layout 10.1 Layout Guidelines TI recommends the following layout guidelines for the LMH0302: 1. The RREF 1% tolerance resistor must be placed as close as possible to the RREF pin. In addition, the copper in the plane layers below the RREF network must be removed to minimize parasitic capacitance. 2. Choose a suitable board stackup that supports 75-Ω single-ended trace and 100-Ω differential trace routing on the top layer of the board. This is typically done with a Layer 2 ground plane reference for the 100-Ω differential traces and a second ground plane at Layer 3 reference for the 75-Ω single-ended traces. 3. Use single-ended uncoupled trace designed with 75-Ω impedance for signal routing to SDO and SDO. The trace width is typically 8-10 mil reference to a ground plane at Layer 3. 4. Use coupled differential traces with 100-Ω impedance for signal routing to SDI and SDI. They are usually 5-mil to 8-mil trace width reference to a ground plane at Layer 2. 5. Place anti-pad (ground relief) on the power and ground planes directly under the 4.7-μF AC-coupling capacitor, return loss network, and IC landing pads to minimize parasitic capacitance. The size of the antipad depends on the board stackup and can be determined by a 3-dimension electromagnetic simulation tool. 6. Use a well-designed BNC footprint to ensure the BNC’s signal landing pad achieves 75-Ω characteristic impedance. BNC suppliers usually provide recommendations on BNC footprint for best results. 7. Keep trace length short between the BNC and SDO. The trace routing for SDO and SDO must be symmetrical, approximately equal lengths, and equal loading. 8. The exposed pad EP of the package must be connected to the ground plane through an array of vias. These vias are solder-masked to avoid solder flow into the plated-through holes during the board manufacturing process. 9. Connect each supply pin (VCC and VEE) to the power or ground planes with a short via. The via is usually placed tangent to the landing pads of the supply pins with the shortest trace possible. 10. Power-supply bypass capacitors must be placed close to the supply pins. 10 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 LMH0302 www.ti.com SNLS247H – APRIL 2007 – REVISED JUNE 2016 10.2 Layout Example Figure 6 shows an example of proper layout requirements for the LMH0302. BNC foot print Anti-pad GND stitch > 5W 75 Anti-pad: 100 coupled trace 49.9 W=8 S = 10 W=8 6.8 0.1 µF nH VCC 4.7 µF Zo = 75 0.1 µF Solder Paste mask 75 4.7 µF 75 6.8 n H W = 10 > 5W VCC 0.1 µF 750 VCC EP GND GND Figure 6. LMH0302 High-Speed Traces Layout Example Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 11 LMH0302 SNLS247H – APRIL 2007 – REVISED JUNE 2016 www.ti.com 11 Device and Documentation Support 11.1 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 11.2 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 11.3 Electrostatic Discharge Caution 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. 11.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 12 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. 12 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Product Folder Links: LMH0302 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 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) LMH0302SQ/NOPB ACTIVE WQFN RUM 16 1000 RoHS & Green SN Level-3-260C-168 HR -40 to 85 L0302 LMH0302SQE/NOPB ACTIVE WQFN RUM 16 250 RoHS & Green SN Level-3-260C-168 HR -40 to 85 L0302 LMH0302SQX/NOPB ACTIVE WQFN RUM 16 4500 RoHS & Green SN Level-3-260C-168 HR -40 to 85 L0302 (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