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Texas Instruments LMH0044SQ/NOPB
- Part No.:
- LMH0044SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0044SQ/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,209
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Product details
Overview
LMH0044SQ/NOPB from Texas Instruments is an SMPTE 292M/259M adaptive cable equalizer IC for serial digital video interfaces, supporting data rates from 125 Mbps to 1.485 Gbps, equalizing up to 200 m of Belden 1694A coax at 1.485 Gbps, and operating from a single 3.3 V supply with 77 mA typical current draw.
For engineers reviewing the LMH0044SQ/NOPB datasheet, LMH0044SQ/NOPB pinout, LMH0044SQ/NOPB application, or LMH0044SQ/NOPB equivalent, key selection considerations include SMPTE compliance, adaptive AEC loop control, programmable mute threshold via MUTEREF, differential input/output capability, and WQFN-16 package thermal performance.
Technical Context
The LMH0044SQ/NOPB implements a multi-stage adaptive filter controlled by an external 1 µF AEC capacitor across AEC+ and AEC−, enabling real-time compensation for dispersive loss in coaxial media. Its DC restoration block handles pathological SMPTE RP-178/RP-198 video patterns without requiring external biasing.
Carrier detect (CD) and output mute (MUTE) are independently controllable, with CD asserting high when no valid signal is present and MUTE forcing differential outputs inactive when driven high. The device supports both differential and AC-coupled single-ended inputs but excludes transformer coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 1.485 Gbps - supports SMPTE 259M (270 Mbps), 292M (1.485 Gbps), and 344M (2.97 Gbps) compliant signals. |
| Cable Equalization | Up to 200 m Belden 1694A at 1.485 Gbps - enables long-haul HD-SDI transmission without repeaters. |
| Supply Voltage | 3.3 V ±5% - single-rail operation simplifies power design in broadcast equipment. |
| Output Swing | 750 mVP–P differential into 50 Ω - meets SMPTE output amplitude requirements for receiver interoperability. |
| Input Return Loss | 15–20 dB (5 MHz–1.5 GHz) - ensures minimal signal reflection on PCB traces and connectors. |
| Power Consumption | 63–77 mA typical - decreases with increasing cable length due to adaptive gain reduction. |
| ESD Rating | 8 kV HBM - requires conductive foam handling per TI's ESD precautions. |
Pinout & Package
LMH0044SQ/NOPB uses a 16-pin WQFN package (RUM0016A) with 4 mm × 4 mm body, 0.8 mm max height, exposed thermal pad connected to VEE, and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | VEE | Negative power supply (ground); four pins reduce ground inductance and improve noise immunity. |
| 2, 3 | SDI / SDI | Differential serial data input - accepts AC-coupled true/complement signals; supports single-ended mode with one pin grounded. |
| 5, 6 | AEC+ / AEC− | External 1 µF capacitor connection points - sets loop dynamics for adaptive equalization bandwidth and convergence speed. |
| 7 | BYPASS | Active-high disable of equalization and DC restoration - used for test or bypassed signal path validation. |
| 8 | MUTEREF | Programmable mute threshold reference - voltage inversely scales maximum equalizable cable length before automatic muting. |
| 10, 11 | SDO / SDO | Differential serial data output - internally 50 Ω terminated; delivers 750 mVP–P swing into 50 Ω load. |
| 13, 16 | VCC | +3.3 V positive supply - dual pins lower supply impedance and improve PSRR. |
| 14 | MUTE | Active-high output mute control - forces SDO/SDO low when high; disabled in BYPASS mode. |
| 15 | CD | Carrier detect open-drain output - high = no valid input signal; tied to MUTE for auto-mute functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Equalization Control (AEC) | Real-time adjustment of gain and bandwidth using external 1 µF capacitor - eliminates manual tuning for varying cable lengths. |
| DC Restoration | Self-biasing circuit restores baseline for pathological video patterns (e.g., SMPTE color bars) - prevents baseline wander without external components. |
| Programmable Mute Threshold | MUTEREF pin accepts 0.7–1.3 V to set cable-length-dependent muting point - enables precise fail-safe behavior in broadcast links. |
| Differential I/O with Internal Termination | 50 Ω differential outputs and 1.3 kΩ single-ended input resistance - reduces external component count and improves signal integrity. |
| SMPTE Compliance Assurance | Validated jitter performance ≤0.3 UI at 1.485 Gbps over 200 m Belden 1694A - meets SMPTE 292M eye diagram mask requirements. |
Applications
| HD-SDI Camera Backhaul | Studio Router Input Equalization |
|---|---|
|
Use Scenario: Transmitting uncompressed 1080p60 video from camera head to control room over 150 m Belden 1694A coax. IC Role / Device Role / Timing Role: Adaptive equalizer restoring high-frequency content lost in coax; provides DC-coupled baseline stability for SMPTE RP-198 video. Use Value: Eliminates need for fixed-gain equalizers or repeaters, reducing latency and system BOM cost while maintaining SMPTE 292M eye compliance. |
Use Scenario: Receiving multiple SDI feeds from field cameras into a broadcast-grade video router with variable cable lengths. IC Role / Device Role / Timing Role: Front-end equalizer compensating for unknown or mismatched cable runs; carrier detect triggers automatic input blanking during source loss. Use Value: Enables plug-and-play input conditioning across diverse cable deployments without manual calibration or firmware updates. |
| DVB-ASI Signal Recovery | Medical Imaging Video Interface |
|
Use Scenario: Recovering 270 Mbps DVB-ASI transport streams over 350 m Belden 1694A in broadcast contribution links. IC Role / Device Role / Timing Role: Adaptive equalizer meeting ETSI EN 300 429 jitter tolerance; supports robust packetized video transport under marginal signal conditions. Use Value: Extends usable reach of existing coax infrastructure beyond standard 100 m limit while preserving bit error rate <1×10⁻¹². |
Use Scenario: Interfacing endoscopic video processors to display monitors in surgical suites using legacy coax cabling. IC Role / Device Role / Timing Role: High-fidelity equalizer preserving edge sharpness and chroma fidelity in real-time diagnostic video; mute function blanks display during probe insertion. Use Value: Maintains clinical image fidelity across aging hospital cabling without replacing infrastructure or introducing digital conversion artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GS1574A | Footprint-compatible Gennum part; lacks integrated DC restoration and has fixed AEC loop response. | Requires external DC bias network for pathological video; less robust under SMPTE RP-198 stress patterns. | Select GS1574A only if legacy board reuse is mandatory and DC restoration is handled externally. |
| LMH0344 | TI successor with extended 2.97 Gbps support (SMPTE 424M), lower 55 mW power, and improved 0.15 UI jitter floor. | Designed for 3G-SDI and 12G-SDI bridging; not backward-pin-compatible due to added control pins and different AEC architecture. | Choose LMH0344 for new 3G-SDI designs requiring higher data rates or lower power; LMH0044SQ/NOPB remains optimal for cost-sensitive 1.5G-SDI systems. |
Compared with GS1574A, LMH0044SQ/NOPB adds self-biasing DC restoration and programmable AEC loop tuning, improving SMPTE compliance margin; compared with LMH0344, it offers proven 1.485 Gbps performance in a smaller footprint and lower unit cost for established HD-SDI infrastructure.
Availability
LMH0044SQ/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, medical imaging video interfaces, and industrial machine vision systems requiring stable component supply and long-term obsolescence management.
Supply support for LMH0044SQ/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 leader specializing in analog, embedded processing, and connectivity technologies, with broad portfolio coverage across industrial, automotive, and communications markets.
The LMH0044SQ/NOPB belongs to TI's high-speed interface product line, engineered specifically for SMPTE-compliant serial digital video equalization in broadcast, medical, and professional AV equipment.
FAQ
What is the maximum cable length LMH0044SQ/NOPB can equalize at 1.485 Gbps?
The LMH0044SQ/NOPB equalizes up to 200 meters of Belden 1694A coaxial cable at 1.485 Gbps while maintaining SMPTE 292M jitter compliance ≤0.3 UI. Performance depends on cable quality and environmental conditions; actual reach may vary with Belden 8281 or other constructions.
Does LMH0044SQ/NOPB support single-ended input configuration?
Yes, LMH0044SQ/NOPB supports single-ended input: tie one SDI pin to VEE and drive the other with an AC-coupled signal. Input return loss and jitter performance remain within specification, though differential mode delivers superior common-mode rejection and noise immunity.
How does the MUTEREF pin affect LMH0044SQ/NOPB operation?
The MUTEREF pin sets the carrier detect threshold: applying 0.7–1.3 V inversely scales the maximum equalizable cable length before automatic muting. Leaving MUTEREF unconnected enables full 200 m equalization at 1.485 Gbps; grounding it disables muting entirely.
Is LMH0044SQ/NOPB pin-compatible with the Gennum GS1574A?
Yes, LMH0044SQ/NOPB is footprint-compatible with the GS1574A per TI's application note, sharing identical 16-pin WQFN (RUM) layout and pin functions. However, LMH0044SQ/NOPB integrates DC restoration and programmable AEC control not present in GS1574A.
What thermal management is required for LMH0044SQ/NOPB in continuous operation?
LMH0044SQ/NOPB requires soldering its exposed thermal pad to a solid copper plane connected to VEE for thermal dissipation. With θJA = 43°C/W, junction temperature stays within 150°C limit at 77 mA and +85°C ambient, provided ≥1 cm² of 2-oz copper is used under the pad.
LMH0044SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Data Transport
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-WQFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0044SQ/NOPB FAQ
1.How can I place an order for LMH0044SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0044SQ/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 LMH0044SQ/NOPB reliable?
The price and inventory of LMH0044SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0044SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0044SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0044SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0044SQ/NOPB?
LMH0044SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0044SQ/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 LMH0044SQ/NOPB?
For technical support, including LMH0044SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0044SQ/NOPB requirements.
6.How does Aetrix verify that LMH0044SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0044SQ/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 LMH0044SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0044SQ/NOPB?
All LMH0044SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0044SQ/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 LMH0044SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH0044SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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