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Texas Instruments LMH0034MA/NOPB
- Part No.:
- LMH0034MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH0034MA/NOPB.pdf
- Description:
- IC INTERFACE SPECIALIZED 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,297
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Product details
Overview
LMH0034MA/NOPB from Texas Instruments is an SMPTE 292M/259M adaptive coaxial 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 at 1.485 Gbps, and delivering 750 mVP–P differential output swing into 50 Ω with single 3.3 V supply operation.
For engineers reviewing the LMH0034MA/NOPB datasheet, LMH0034MA/NOPB pinout, LMH0034MA/NOPB application, or LMH0034MA/NOPB equivalent, this device is selected for high-fidelity SDI signal recovery in broadcast infrastructure where cable loss compensation, DC restoration, and carrier-detect–based output muting are required.
Technical Context
The LMH0034MA/NOPB implements a multi-stage adaptive filter controlled by an external 1 µF AEC capacitor across AEC+ and AEC−, enabling real-time equalization gain and bandwidth adjustment based on cable loss characteristics. Its DC restoration block fully restores baseline for pathological SMPTE RP-178/RP-198 video signals without requiring external clamping.
Cable length indication (CLI) provides a monotonic analog voltage (2.5 V → 1.9 V) inversely proportional to equalized cable length, while the bi-directional CD/MUTE pin supports both automatic carrier detection and manual output muting-functionally independent of BYPASS mode activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 125 Mbps to 1.485 Gbps - supports SMPTE 259M (SD-SDI), 292M (HD-SDI), and 344M (dual-link HD-SDI) standards |
| Equalization Capacity | Up to 200 m Belden 1694A at 1.485 Gbps - enables long-haul HD-SDI transmission over standard 75 Ω coax |
| Output Swing | 750 mVP–P differential into 50 Ω - meets SMPTE output amplitude compliance for downstream receiver sensitivity |
| Supply & Power | Single 3.3 V ±5% supply; 63–77 mA ICC - current decreases with increasing cable length, reducing thermal load in long-cable scenarios |
| Input Interface | Differential or single-ended AC-coupled input - accepts transformerless interface with 1.0 µF coupling capacitor, no DC bias dependency |
| Mute Control | Programmable MUTEREF threshold (0.7–1.3 V) - sets maximum equalizable cable length before automatic output muting |
| Jitter Tolerance | ≤0.25 UI at 1.485 Gbps (200 m Belden 1694A) - preserves eye opening for robust clock recovery in broadcast-grade receivers |
Pinout & Package
LMH0034MA/NOPB is housed in a 16-pin SOIC (D package), 1.27 mm pitch, RoHS-compliant, with exposed pad not present and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CLI | Cable Length Indicator output | Analog voltage (2.5 V → 1.9 V) inversely tracking equalized coax length; valid only when input signal is present |
| 2 VCC | Positive supply | +3.3 V power rail; two pins (2 & 15) provide low-impedance supply path for analog core and output drivers |
| 4,5 SDI / SDI | Differential serial data input | True/complement inputs accepting AC-coupled SMPTE-compliant signals; 1 kΩ input resistance, 1 pF capacitance |
| 7,8 AEC+ / AEC− | Adaptive Equalization Control loop filter | Connection points for external 1 µF capacitor setting AEC loop dynamics and convergence speed |
| 9 BYPASS | Equalization disable control | High-level logic disables both equalizer filter and DC restoration; passes input directly to output stage |
| 10 MUTEREF | Mute reference threshold input | DC voltage (0.7–1.3 V) setting maximum cable length before CD/MUTE asserts mute; floating = max equalization |
| 12,13 SDO / SDO | Differential serial data output | 50 Ω internally terminated outputs delivering 750 mVP–P swing; no external termination required |
| 16 CD/MUTE | Bi-directional carrier detect/mute control | Outputs high when no valid signal detected; accepts high/low override to force mute/enable regardless of signal presence |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive equalization architecture | Multi-stage filter with external AEC capacitor tuning - dynamically compensates varying coax loss profiles without manual configuration |
| Integrated DC restoration | Self-biasing circuit handling SMPTE RP-178/RP-198 pathological sequences - eliminates baseline wander in color bar and sync pulse patterns |
| Programmable cable-length–based muting | MUTEREF-adjustable threshold - prevents degraded-signal propagation by muting outputs beyond usable equalization range |
| Form-fit-function replacement for GS1524/GS1524A | Pin-compatible drop-in upgrade - retains existing PCB layout while adding improved jitter performance and lower power |
| On-chip cable length indicator (CLI) | Analog voltage output calibrated to Belden 1694A - enables system-level diagnostics and real-time link health monitoring |
Applications
| Broadcast Camera Backhaul | HD-SDI Distribution Amplifier |
|---|---|
|
Use Scenario: Transmitting uncompressed 1080p60 video from studio camera head to control room over 150 m of Belden 1694A coax. IC Role / Device Role / Timing Role: Adaptive equalizer restoring high-frequency loss and DC baseline of SMPTE 292M signal prior to reclocking. Use Value: Maintains >20 dB input return loss and ≤0.25 UI jitter at receiver input, ensuring error-free decoding without repeaters. |
Use Scenario: Fan-out of one HD-SDI source to eight monitors in live production truck with mixed cable lengths (50–180 m). IC Role / Device Role / Timing Role: Input equalizer stage in each distribution path, normalizing signal integrity across variable cable runs. Use Value: CLI voltage per channel enables firmware-based cable length mapping and dynamic gain calibration per output leg. |
| Medical Imaging Video Link | Outside Broadcast (OB) Truck Interface |
|
Use Scenario: Routing 3G-SDI endoscopy feed from operating room to PACS archive over 120 m fixed installation. IC Role / Device Role / Timing Role: Front-end equalizer in receiving module, recovering signal degraded by aging coax and EMI exposure. Use Value: BYPASS pin allows legacy compatibility testing; CD/MUTE prevents display artifacts during cable disconnect events. |
Use Scenario: Integrating third-party graphics generator into OB truck with legacy SDI infrastructure using non-uniform cable plant. IC Role / Device Role / Timing Role: Signal conditioner at equipment boundary, compensating for impedance mismatches and connector losses. Use Value: MUTEREF-adjusted muting avoids spurious video bursts during source switching; 3.3 V operation simplifies power domain integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adaptive SDI equalizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GS1524A | Legacy Gennum part; identical pinout and function but higher 95 mA ICC and no CLI output | Lacks cable diagnostics and consumes ~25% more power; suitable only for drop-in replacement where CLI is unused | Select GS1524A only if legacy stock or qualification constraints prohibit LMH0034MA/NOPB adoption |
| LMH0344MA/NOPB | TI's pin-compatible successor with extended 2.97 Gbps support and improved 0.18 UI jitter spec | Supports 3G-SDI (SMPTE 424M); requires updated layout for enhanced RF isolation but same footprint | Choose LMH0344MA/NOPB for new 3G-SDI designs; LMH0034MA/NOPB remains optimal for cost-sensitive 1.5G-SDI systems |
Compared with GS1524A, LMH0034MA/NOPB reduces power by 25% and adds diagnostic CLI output; compared with LMH0344MA/NOPB, it offers lower cost and proven stability in mature HD-SDI infrastructure without needing 3G-SDI bandwidth.
Availability
LMH0034MA/NOPB is available at Aetrix Electronics and suitable for broadcast infrastructure, medical imaging video links, and outside broadcast truck interfaces requiring stable component supply, long-lifecycle assurance, and SMPTE-compliant signal integrity.
Supply support for LMH0034MA/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 decades of broadcast video interface innovation.
The LMH0034MA/NOPB belongs to TI's high-speed interface product line, engineered specifically for SMPTE-compliant serial digital video equalization in professional broadcast, medical, and industrial video systems.
FAQ
What data rates does the LMH0034MA/NOPB support?
The LMH0034MA/NOPB supports input data rates from 125 Mbps to 1.485 Gbps, fully compliant with SMPTE 259M (SD-SDI), SMPTE 292M (HD-SDI), and SMPTE 344M (dual-link HD-SDI) standards. It maintains specified jitter performance and output swing across this entire range, with equalization optimized for coaxial cable loss profiles typical of broadcast environments.
How does the CLI pin on the LMH0034MA/NOPB function in system design?
The CLI pin on the LMH0034MA/NOPB outputs an analog voltage (2.5 V at 0 m → 1.9 V at max equalization) inversely proportional to the length of Belden 1694A coax being equalized. This signal is valid only when an input signal is present and enables real-time link diagnostics, automatic gain calibration, or firmware-based cable health monitoring in broadcast equipment using the LMH0034MA/NOPB.
Can the LMH0034MA/NOPB replace the Gennum GS1524 without PCB changes?
Yes, the LMH0034MA/NOPB is form-fit-function compatible with the Gennum GS1524 and GS1524A, sharing identical 16-pin SOIC packaging, pinout, and basic functional interface. No PCB layout changes are required for drop-in replacement, though LMH0034MA/NOPB adds CLI functionality and reduces typical supply current from 95 mA to 77 mA under equivalent conditions.
What is the role of the AEC+ and AEC− pins on the LMH0034MA/NOPB?
The AEC+ and AEC− pins on the LMH0034MA/NOPB connect to an external 1 µF capacitor that sets the loop dynamics of the adaptive equalization control system. This capacitor determines convergence speed and stability of the multi-stage filter's response to changing cable loss, directly influencing how rapidly the LMH0034MA/NOPB adapts to different coax lengths and frequency-dependent attenuation.
Does the LMH0034MA/NOPB require external termination resistors on its SDO outputs?
No, the LMH0034MA/NOPB integrates 50 Ω termination on both SDO and SDO differential outputs, delivering a 750 mVP–P swing into matched loads without external resistors. This internal termination simplifies board layout, ensures consistent impedance matching, and eliminates stub reflections-critical for maintaining SMPTE-compliant signal integrity in the LMH0034MA/NOPB application.
LMH0034MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- SMPTE 292M / 259 M
- Interface:
- Serial
- Voltage - Supply:
- 3.135V ~ 3.465V
- Supplier Device Package:
- 16-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LMH0034MA/NOPB FAQ
1.How can I place an order for LMH0034MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0034MA/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 LMH0034MA/NOPB reliable?
The price and inventory of LMH0034MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0034MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0034MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0034MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0034MA/NOPB?
LMH0034MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0034MA/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 LMH0034MA/NOPB?
For technical support, including LMH0034MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0034MA/NOPB requirements.
6.How does Aetrix verify that LMH0034MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0034MA/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 LMH0034MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0034MA/NOPB?
All LMH0034MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0034MA/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 LMH0034MA/NOPB part is unused and in its original packaging.
Return procedure for LMH0034MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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