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Texas Instruments LMH0387SLE/NOPB
- Part No.:
- LMH0387SLE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 48-VFQFN
- Datasheet:
-
LMH0387SLE/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 48TLGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,484
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Product details
Overview
LMH0387SLE/NOPB from Texas Instruments is a configurable 3Gbps HD/SD SDI adaptive cable equalizer and cable driver IC with single BNC I/O, supporting SMPTE ST 424/292/259 and DVB-ASI standards, operating from 125Mbps to 2.97Gbps, and equalizing up to 120m of Belden 1694A at 2.97Gbps - used in broadcast video encoders, distribution amplifiers, and modular digital video servers.
For engineers reviewing the LMH0387SLE/NOPB datasheet, LMH0387SLE/NOPB pinout, LMH0387SLE/NOPB application, or LMH0387SLE/NOPB equivalent, key selection considerations include configurable input/output mode via TX_EN, programmable LVDS output swing (400–800 mVP-P) and common-mode voltage (1.05–1.85 V), integrated return loss network, and dual-slew-rate cable driver compliance with ST 259 (SD) and ST 424/292 (HD/3G).
Technical Context
The LMH0387SLE/NOPB implements an adaptive analog equalization architecture for degraded coaxial inputs and a programmable current-mode cable driver with selectable slew rate (SD/HD pin-controlled), enabling dynamic reconfiguration between receiver and transmitter roles on the same BNC_IO pin. It integrates termination networks (TERMRX/TERMTX), AEC loop filter interfaces (AEC+/AEC−), and SPI-managed control of launch amplitude, carrier detect threshold, and sleep modes.
Its dual-domain operation requires distinct biasing: VCCRX powers the LVDS receiver outputs (SDO/SDO), while VCCTX supplies the 75Ω current-mode cable driver; both operate from a single 3.3V supply. The device supports loopback mode (Tx+Rx enabled simultaneously) and auto-sleep detection with <200 µs power-down latency upon signal loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps (equalizer); DC to 2.97 Gbps (cable driver) - covers SD, HD, and 3G-SDI standards without retuning. |
| Equalization Reach | Up to 120 m Belden 1694A @ 2.97 Gbps - enables long-haul HD-SDI links in broadcast infrastructure. |
| Output Swing | Programmable 400–800 mVP-P LVDS (receiver) and 800 mVP-P @ RREF = 715 Ω (driver) - ensures compatibility with diverse FPGA/CPLD inputs and legacy SDI receivers. |
| Return Loss | ≥15 dB (5 MHz–1.5 GHz), ≥10 dB (1.5–3 GHz) - meets SMPTE ST 292/424 return loss requirements without external components. |
| Supply Voltage | 3.14–3.46 V - operates robustly across industrial temperature range (−40°C to +85°C) with single 3.3V rail. |
| Jitter Performance | ≤0.35 UI equalizer jitter @ 2.97 Gbps / 120 m; ≤20 psP-P additive jitter (cable driver) - preserves eye integrity for SMPTE-compliant serial video transmission. |
| Slew Rate Control | SD/HD pin selects rise/fall time: 65–130 ps (HD/3G) or 400–800 ps (SD) - ensures compliance with ST 259M and ST 424M timing envelopes. |
Pinout & Package
LMH0387SLE/NOPB uses a 7 mm × 7 mm 48-pin laminate thin laminate grid array (TLGA) package with exposed thermal pad (NPD designation). Pin functions are validated per TI SNLS315I Rev JUNE 2026 datasheet Figure 4-1 and Table 4-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BNC_IO | Configurable I/O | Single pin serving as AC-coupled SDI input (equalizer mode) or output (cable driver mode); connects directly to BNC via 4.7 µF capacitor. |
| TX_EN | Driver Enable | LVCMOS input with internal pullup; high = enable cable driver, low = disable driver and enter power-down - essential for mode selection. |
| SD/HD | Slew Rate Select | LVCMOS input with internal pulldown; low = fast edge (ST 424/292), high = slow edge (ST 259) - determines compliance profile without firmware change. |
| SDO / SDO | Differential LVDS Output | Internally terminated 100 Ω LVDS pair; programmable swing (400–800 mVP-P) and common-mode (1.05–1.85 V) - interfaces directly to FPGA transceivers or video processors. |
| RREF | Driver Amplitude Set | Analog input; 715 Ω resistor to VCC sets nominal 800 mVP-P output swing - enables precise level tuning for cable loss compensation. |
| CD | Carrier Detect | LVCMOS open-drain output; low = valid SDI signal detected on BNC_IO - provides real-time link status for system monitoring and failover logic. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable I/O Architecture | Single BNC_IO pin supports both equalizer (input) and cable driver (output) modes - reduces board space and connector count in modular video equipment. |
| Integrated Return Loss Network | No external components required to meet SMPTE ST 292/424 return loss specs - eliminates layout sensitivity and accelerates design validation. |
| Programmable LVDS Output | Adjustable common-mode voltage (1.05–1.85 V) and differential swing (400–800 mVP-P) via SPI - enables interoperability with 1.8V, 2.5V, and 3.3V logic families. |
| Cable Length Indication | Real-time estimation of coaxial cable length based on equalizer adaptation state - supports dynamic link margin optimization and diagnostics. |
| Auto Sleep Mode | Automatic power-down of equalizer section when no signal detected (<200 µs response) - reduces idle power to 11 mA without compromising link reacquisition. |
| Dual-Slew-Rate Driver | Hardware-selectable rise/fall times (65–130 ps or 400–800 ps) via SD/HD pin - guarantees compliance with both SD and HD/3G-SDI timing masks in one device. |
Applications
| Broadcast Video Encoder | Distribution Amplifier |
|---|---|
Use Scenario: Encoding uncompressed HD/3G-SDI signals from cameras into compressed formats for streaming or recording. IC Role / Device Role / Timing Role: LMH0387SLE/NOPB acts as adaptive equalizer on input path to restore degraded signals from long camera cables before digitization. Use Value: Enables reliable capture of SMPTE ST 424 signals over 120 m Belden 1694A without manual gain adjustment or external equalization circuitry. | Use Scenario: Replicating a single SDI source to multiple monitors or downstream processing units in live production trucks. IC Role / Device Role / Timing Role: LMH0387SLE/NOPB serves as cable driver on output path to drive multiple 75 Ω coaxial drops with minimal jitter accumulation. Use Value: Maintains <20 psP-P additive jitter and >15 dB return loss across all outputs, preserving eye opening for multi-drop fanout. |
| Digital Video Server | Modular Video Processing Chassis |
Use Scenario: Ingesting and routing baseband SDI feeds in cloud-based or on-premise video servers with hot-swappable I/O modules. IC Role / Device Role / Timing Role: LMH0387SLE/NOPB provides bidirectional SDI interface per module slot, configured dynamically as input or output via FPGA control. Use Value: Eliminates need for separate equalizer and driver ICs per port, reducing BOM cost and PCB area by ~40% versus discrete solutions. | Use Scenario: Building scalable video processing systems where I/O functionality is defined at assembly (e.g., encoder vs decoder vs crosspoint). IC Role / Device Role / Timing Role: LMH0387SLE/NOPB implements standardized SDI front-end with programmable swing, slew rate, and termination - simplifying firmware and layout reuse. Use Value: Supports field-upgradable I/O configuration via SPI register writes, enabling one hardware design to serve multiple product SKUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI equalizer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0303SQ/NOPB | Dedicated 3G-SDI equalizer only (no cable driver); 40-pin WQFN; fixed 700 mVP-P LVDS output. | Lacks configurable I/O and cable driving capability - suitable only for receive-only paths. | Select when system requires only high-performance equalization with minimal footprint and no transmit function needed. |
| GS2971AIBE3 | 3G-SDI reclocker with integrated CDR; 64-pin QFN; supports SMPTE ST 2081/2082; requires external loop filter. | Provides clock recovery and jitter cleaning but no adaptive equalization - better for regenerated outputs than raw coax restoration. | Select when end-to-end jitter reduction and protocol-aware reclocking are required, not just cable loss compensation. |
Compared with LMH0303SQ/NOPB, LMH0387SLE/NOPB adds full bidirectional functionality and programmability at the cost of larger package and higher pin count; compared with GS2971AIBE3, it offers superior adaptive equalization for severely degraded signals but lacks CDR-based jitter cleanup - making LMH0387SLE/NOPB optimal for direct coax interface where signal integrity restoration is primary.
Availability
LMH0387SLE/NOPB is available at Aetrix Electronics and suitable for broadcast video encoders, distribution amplifiers, and digital video servers requiring stable component supply, long-lifecycle support, and SMPTE-compliant signal integrity.
Supply support for LMH0387SLE/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies, with leadership in high-speed interface and video signal conditioning ICs.
The LMH0387SLE/NOPB belongs to TI's high-definition serial digital interface (HD-SDI) product line, designed specifically for broadcast-grade video infrastructure requiring adaptive cable equalization, low-jitter cable driving, and SMPTE standard compliance in compact form factors.
FAQ
What is the primary function of the LMH0387SLE/NOPB in a video system?
The LMH0387SLE/NOPB serves as a configurable 3Gbps HD/SD SDI adaptive cable equalizer and cable driver, enabling a single BNC interface to operate either as a receiver (restoring degraded coax signals) or transmitter (driving long coax runs) depending on system configuration. Its core value lies in eliminating separate equalizer and driver ICs - LMH0387SLE/NOPB reduces design complexity and PCB area while maintaining SMPTE ST 424/292/259 compliance across both roles.
How does the LMH0387SLE/NOPB achieve SMPTE-compliant return loss without external components?
The LMH0387SLE/NOPB integrates a passive return loss network internally, meeting SMPTE ST 292/424 requirements of ≥15 dB (5 MHz–1.5 GHz) and ≥10 dB (1.5–3 GHz) without external resistors or capacitors. This is implemented via on-die termination structures tied to TERMRX (for receiver input) and TERMTX (for driver output), which - when properly connected per datasheet guidelines (e.g., 1 µF + 220 Ω to ground for TERMRX) - ensure broadband impedance matching across the SDI frequency band.
Can the LMH0387SLE/NOPB operate in loopback mode, and what are the implications?
Yes, the LMH0387SLE/NOPB supports loopback mode with both cable driver and equalizer active simultaneously, drawing 117 mA typical supply current at 2.97 Gbps. This mode enables real-time signal integrity verification, such as measuring end-to-end jitter or validating equalization performance without external test equipment. However, loopback requires careful thermal management due to increased power dissipation and must be enabled via SPI register settings (e.g., disabling auto-sleep) and proper TX_EN assertion.
What is the role of the CD (Carrier Detect) pin on the LMH0387SLE/NOPB, and how is it used?
The CD pin on the LMH0387SLE/NOPB is an LVCMOS open-drain output that indicates presence of a valid SDI signal on the BNC_IO pin: CD goes low when signal is detected, high when absent. It interfaces directly to FPGA GPIO or microcontroller interrupt lines for automatic link monitoring and failover. Threshold sensitivity is adjustable via CDTHRESH pin voltage - allowing system designers to tune detection sensitivity for specific cable lengths or noise environments without firmware changes.
How does the LMH0387SLE/NOPB handle different data rates like SD, HD, and 3G-SDI within the same hardware design?
The LMH0387SLE/NOPB automatically adapts to data rates from 125 Mbps to 2.97 Gbps using its adaptive equalization algorithm and programmable cable driver. For SD (270 Mbps), it extends reach to 400 m on Belden 1694A; for HD (1.485 Gbps), up to 200 m; and for 3G (2.97 Gbps), up to 120 m. Slew rate is selected via the SD/HD pin (low for HD/3G, high for SD), and output swing/common-mode voltage are tuned via SPI registers - enabling one LMH0387SLE/NOPB design to support all three standards without hardware modification.
LMH0387SLE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Amplifier
- Interface:
- SPI Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 48-TLGA (7x7)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0387SLE/NOPB FAQ
1.How can I place an order for LMH0387SLE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0387SLE/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMH0387SLE/NOPB reliable?
The price and inventory of LMH0387SLE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0387SLE/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0387SLE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0387SLE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0387SLE/NOPB?
LMH0387SLE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0387SLE/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMH0387SLE/NOPB?
For technical support, including LMH0387SLE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0387SLE/NOPB requirements.
6.How does Aetrix verify that LMH0387SLE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0387SLE/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMH0387SLE/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0387SLE/NOPB?
All LMH0387SLE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0387SLE/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMH0387SLE/NOPB part is unused and in its original packaging.
Return procedure for LMH0387SLE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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