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Texas Instruments LMH0394SQ/NOPB
- Part No.:
- LMH0394SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0394SQ/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,056
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Product details
Overview
LMH0394SQ/NOPB from Texas Instruments is a 3G HD/SD SDI adaptive cable equalizer IC designed for serial digital video signal recovery in broadcast infrastructure. It supports ST 424 (3G), ST 292 (HD), ST 259 (SD), ST 344, and DVB-ASI standards; operates from 125 Mbps to 2.97 Gbps; delivers 200 m equalized reach over Belden 1694A coax at 2.97 Gbps; consumes only 115 mW in normal operation; and features programmable de-emphasis for FR4 trace compensation.
For engineers reviewing the LMH0394SQ/NOPB datasheet, LMH0394SQ/NOPB pinout, LMH0394SQ/NOPB application, or LMH0394SQ/NOPB equivalent, key selection considerations include adaptive equalization bandwidth, SPI vs. pin-mode configurability, ultra-low power consumption in auto-sleep mode (17 mW), LVDS output common-mode voltage programmability (0.8–1.2 V), and crosstalk-immune input architecture for multi-channel routing systems.
Technical Context
The LMH0394SQ/NOPB implements a multi-stage adaptive filter with active sensing circuitry that dynamically adjusts gain and bandwidth based on input signal launch amplitude and cable loss profile. Its DC restoration block fully restores pathological video patterns per SMPTE RP-178/RP-198, ensuring robust handling of long strings of identical bits without baseline wander.
It supports dual operational modes: pin-strapped mode (SPI_EN = GND) for drop-in replacement of LMH0384/LMH0344 with identical 16-pin WQFN footprint, and SPI mode (SPI_EN = VCC) enabling daisy-chained configuration of multiple devices via MOSI/MISO/SCK/SS interface for centralized control of output swing (400–800 mVP-P), de-emphasis level, MUTEREF threshold, and carrier detect behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 2.97 Gbps - covers full SD/HD/3G-SDI spectrum including ST 259, ST 292, ST 424, and DVB-ASI. |
| Equalized Cable Reach | 200 m @ 2.97 Gbps on Belden 1694A - enables long-haul routing in broadcast switchers without repeaters. |
| Power Consumption | 115 mW normal / 17 mW auto-sleep - reduces thermal load and system power budget in dense router chassis. |
| Output Interface | Internally terminated 100-Ω LVDS with programmable VOS (0.8–1.2 V) and swing (400–800 mVP-P) - ensures compatibility with diverse reclockers (e.g., LMH0346, LMH0356). |
| De-Emphasis Support | Programmable to compensate up to 40″ FR4 PCB trace loss - maintains signal integrity from equalizer to downstream FPGA or serializer. |
| Supply Voltage | Single 2.5 V ±5% - simplifies power delivery and eliminates need for dual-rail supplies in video processing modules. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and broadcast equipment deployed in uncontrolled environments. |
Pinout & Package
Package: 16-pin WQFN (4.00 mm × 4.00 mm), exposed thermal pad (DAP) connected to VEE (ground). Pin-compatible with LMH0384, LMH0344, LMH0044, and LMH0074 in pin mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9, DAP | VEE | Ground reference for analog and digital sections; DAP must be soldered to PCB ground plane for thermal and EMI performance. |
| 2, 3 | SDI / SDI | Differential true/complement SDI input pair; AC-coupled, internally biased; accepts single-ended input with proper termination. |
| 4 | SPI_EN | Mode select: GND = pin mode (legacy compatible); VCC = SPI mode (daisy-chain register access). |
| 5, 6 | AEC+ / AEC− | External loop filter capacitor connections (1 µF optional) for adaptive equalizer control loop stability. |
| 7 | BYPASS | Logic high disables equalization - used for diagnostic pass-through or short-cable configurations. |
| 8 | MUTEREF | Analog threshold input setting carrier detect sensitivity; voltage inversely proportional to max equalizable cable length. |
| 10, 11 | SDO / SDO | LVDS differential output pair; internally terminated to 100 Ω; programmable common-mode and swing via SPI. |
| 12 | AUTO SLEEP | Enables deep power-down (<17 mW) when no valid input detected; overrides MUTE and BYPASS. |
| 13, 16 | VCC | +2.5 V supply pins; require local 100-nF ceramic decoupling each. |
| 14 | MUTE | Forces outputs to logic-1 state; tied to CD for automatic muting during signal loss. |
| 15 | CD | Carrier detect output: high = no valid input; low = signal present; drives MUTE when connected. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Equalization with Active Sensing | Real-time adjustment of filter gain/bandwidth based on input amplitude and spectral content - maintains eye opening across varying cable lengths and data rates. |
| DC Restoration Block | Self-biasing circuitry compliant with SMPTE RP-178/RP-198 - prevents baseline wander on pathological video patterns (e.g., long runs of 0s/1s). |
| Programmable Output De-Emphasis | Compensates frequency-dependent loss in FR4 PCB traces up to 40″ - preserves signal integrity between equalizer and downstream receiver. |
| Dual-Mode Operation (Pin/SPI) | Footprint-compatible pin mode for legacy designs; SPI mode enables centralized configuration of multi-device systems via daisy chain. |
| Ultra-Low Power Auto Sleep | Reduces supply current from 65 mA to 10 mA when no input detected - extends uptime in modular broadcast chassis with dynamic channel activation. |
Applications
| Broadcast Video Router | HD/3G-SDI Distribution Amplifier |
|---|---|
Use Scenario: High-density 32×32 broadcast video router handling mixed SD/HD/3G-SDI signals across 100+ channels. IC Role / Device Role / Timing Role: Adaptive equalizer placed at input stage of each channel to restore degraded coax-fed signals before switching matrix and reclocking. Use Value: Enables 200 m input reach at 2.97 Gbps while maintaining <0.55 UI jitter - eliminates need for external repeaters and reduces channel latency by 3.5 ns vs. fixed-gain alternatives. | Use Scenario: Rack-mounted distribution amplifier feeding 16 synchronized HD-SDI outputs from a single 3G-SDI source in live production truck. IC Role / Device Role / Timing Role: Input equalizer recovering signal after long coax run from camera; feeds fanout buffer and reclocker chain. Use Value: Ultra-low 115 mW power dissipation allows 16-channel thermal design within 1U chassis; programmable VOS ensures compatibility with both legacy and modern reclockers. |
| Studio Camera Interface Module | Mobile OB Van Signal Conditioning |
Use Scenario: Compact camera-back interface board converting triax or fiber return signal to baseband SDI for on-board monitor and recording. IC Role / Device Role / Timing Role: Final-stage equalizer compensating for loss in last 30 m of coax between breakout box and camera head. Use Value: Auto-sleep mode cuts power to 17 mW during camera standby - extends battery life in portable setups without compromising wake-up time (<5 ms). | Use Scenario: Mobile outside broadcast van with mixed-vintage equipment requiring interoperability between SD, HD, and 3G sources. IC Role / Device Role / Timing Role: Universal equalizer supporting all SMPTE standards in single hardware design, configured via SPI for per-channel optimization. Use Value: Single 16-pin WQFN footprint replaces three discrete equalizers (SD/HD/3G), reducing BOM count and layout complexity while maintaining ST 424/292/259 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0384SQ/NOPB | No SPI interface; fixed 700 mVP-P output swing; no programmable VOS or de-emphasis; higher 145 mW power draw. | Limited to pin-mode configuration only; suitable for cost-sensitive, static installations without remote management needs. | Select when SPI control and power savings are unnecessary and legacy LMH0384 footprint reuse is mandatory. |
| LMH0344SQ/NOPB | Supports only up to 1.5 Gbps; no auto-sleep mode; 160 mW typical power; no cable-length indicator or MUTEREF programming. | Restricted to HD-SDI (ST 292) and below; lacks 3G-SDI (ST 424) compliance and advanced power management. | Select only for HD-only systems where 3G support and ultra-low power are not required. |
Compared with LMH0384SQ/NOPB and LMH0344SQ/NOPB, the LMH0394SQ/NOPB provides full 3G-SDI support, 30% lower active power, SPI-based system-level configuration, and programmable output parameters - making it the only option for future-proof, energy-efficient, and centrally managed broadcast infrastructure.
Availability
LMH0394SQ/NOPB is available at Aetrix Electronics and suitable for broadcast video routers, HD/3G-SDI distribution amplifiers, and studio camera interface modules requiring stable component supply, long-lifecycle assurance, and SMPTE-compliant signal integrity.
Supply support for LMH0394SQ/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 for industrial, automotive, and communications markets.
The LMH0394SQ/NOPB belongs to TI's high-speed interface product line, engineered specifically for SMPTE-compliant broadcast video signal conditioning - emphasizing low jitter, adaptive equalization, and power efficiency in real-time video infrastructure.
FAQ
What is the maximum supported data rate for LMH0394SQ/NOPB?
The LMH0394SQ/NOPB supports a maximum input data rate of 2.97 Gbps, fully compliant with SMPTE ST 424 for 3G-SDI applications. It also handles lower rates including 1.485 Gbps (HD-SDI, ST 292), 270 Mbps (SD-SDI, ST 259), and DVB-ASI. This wide range enables single-device support across legacy and next-generation broadcast equipment.
Does LMH0394SQ/NOPB require external passive components for basic operation?
Yes - LMH0394SQ/NOPB requires two 100-nF ceramic decoupling capacitors on each VCC pin (pins 13 and 16), AC-coupling capacitors on SDI inputs (typically 100 nF), and optionally a 1-µF capacitor between AEC+ and AEC− for enhanced loop stability. No external termination resistors are needed on SDO outputs due to internal 100-Ω LVDS termination.
Can LMH0394SQ/NOPB operate without SPI configuration?
Yes - LMH0394SQ/NOPB operates in pin mode when SPI_EN is pulled low (GND), using dedicated control pins (BYPASS, AUTO SLEEP, MUTE, CD) for basic functionality. In this mode, it is footprint-compatible with LMH0384SQ/NOPB and LMH0344SQ/NOPB, enabling drop-in upgrades without PCB changes.
What is the purpose of the MUTEREF pin on LMH0394SQ/NOPB?
The MUTEREF pin on LMH0394SQ/NOPB sets the analog threshold for carrier detect (CD) and determines the maximum cable length before automatic muting. Applying a voltage inversely proportional to desired reach (e.g., 1.0 V for ~150 m at 2.97 Gbps) configures CD sensitivity. Leaving MUTEREF unconnected or grounded enables default detection behavior for standard installations.
How does auto-sleep mode affect system timing in LMH0394SQ/NOPB?
In auto-sleep mode, LMH0394SQ/NOPB powers down within 200 µs of signal loss and wakes fully functional within ~5 ms of signal reappearance. This delay is negligible relative to SDI video frame timing (e.g., 33.3 ms for 30 Hz), and the equalizer adaptation loop settling time dominates overall recovery - ensuring no visible artifacts or frame drops in broadcast applications.
LMH0394SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Amplifier
- Interface:
- SPI Serial
- Voltage - Supply:
- 2.375V ~ 2.625V
- Supplier Device Package:
- 16-WQFN (4x4)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0394SQ/NOPB FAQ
1.How can I place an order for LMH0394SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0394SQ/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 LMH0394SQ/NOPB reliable?
The price and inventory of LMH0394SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0394SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0394SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0394SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0394SQ/NOPB?
LMH0394SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0394SQ/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 LMH0394SQ/NOPB?
For technical support, including LMH0394SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0394SQ/NOPB requirements.
6.How does Aetrix verify that LMH0394SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0394SQ/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 LMH0394SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0394SQ/NOPB?
All LMH0394SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0394SQ/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 LMH0394SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH0394SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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