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Texas Instruments LMH0302SQ/NOPB
- Part No.:
- LMH0302SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LMH0302SQ/NOPB.pdf
- Description:
- IC VIDEO DRIVER 16WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,667
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Product details
Overview
LMH0302SQ/NOPB from Texas Instruments is a 3-Gbps HD/SD SDI cable driver IC designed for serial digital video transmission in broadcast infrastructure. It supports ST 424 (3G), ST 292 (HD), and ST 259 (SD) standards, delivers 75-Ω single-ended outputs with 800 mVP–P swing into 75-Ω load, features selectable slew rate via SD/HD pin, and operates from a single 3.3-V supply with 165 mW typical power in HD mode.
For engineers reviewing the LMH0302SQ/NOPB datasheet, LMH0302SQ/NOPB pinout, LMH0302SQ/NOPB application, or LMH0302SQ/NOPB equivalent, key selection criteria include SMPTE-compliant rise/fall time control (90–130 ps or 400–800 ps), differential 100-Ω input interface, output driver enable functionality, RREF-based output amplitude tuning, and WQFN-16 package thermal performance (RθJA = 47.8°C/W).
Technical Context
The LMH0302SQ/NOPB implements a current-mode output stage with externally adjustable amplitude via RREF (750 Ω recommended), enabling precise 75-Ω coaxial line driving compliant with SMPTE return loss requirements (≥15 dB from 5 MHz to 1.5 GHz). Its dual-slew-rate architecture-controlled by the SD/HD pin-directly maps to ST 259 (slow) and ST 292/424 (fast) timing envelopes.
Input stage accepts differential SDI/SDI signals with 100-Ω termination and self-biased common-mode range (1.1 V + VSDI/2 to VCC – VSDI/2); ENABLE pin provides hardware-level output driver shutdown with internal pullup. All DC and AC electrical characteristics-including additive jitter (20 psP–P at 2.97 Gbps) and duty cycle distortion (27 ps)-are specified across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 2.97 Gbps - supports full SMPTE ST 424 (3G-SDI) operation without retiming. |
| Output Swing | 720–880 mVP–P into 75-Ω - set by external RREF resistor (750 Ω yields 800 mVP–P), enabling compliance with SMPTE amplitude masks. |
| Rise/Fall Time | 90–130 ps (ST 292/424) or 400–800 ps (ST 259) - selected via SD/HD pin logic level per standard-specific eye diagram requirements. |
| Additive Jitter | 20 psP–P at 2.97 Gbps - ensures receiver eye opening meets SMPTE ST 292/424 margin thresholds. |
| Supply Voltage | 3.13–3.46 V - single 3.3-V rail operation with 59 mA max ICC in HD mode, simplifying power delivery. |
| Operating Temp | −40°C to +85°C - qualified for industrial broadcast equipment environments including routers and distribution amplifiers. |
| Package | 16-pin WQFN (4.0 mm × 4.0 mm) - exposes thermal pad for PCB heat sinking; RθJA = 47.8°C/W enables high-density layout. |
Pinout & Package
LMH0302SQ/NOPB uses a 16-pin WQFN (RUM) package with 4.0 mm × 4.0 mm body size and 0.65-mm pitch. The exposed thermal pad (EP) must be soldered to the PCB ground plane via via array for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI / SDI | Differential serial data input | Accepts AC- or DC-coupled SMPTE-compliant differential video stream; internally self-biased for 100-Ω termination. |
| SDO / SDO | Differential serial data output | Current-mode 75-Ω single-ended outputs; require external 4.7-µF AC-coupling caps per SMPTE wander specification. |
| ENABLE | Output driver enable control | Active-low; internal pullup ensures default enabled state; drives output stage into low-power shutdown when asserted. |
| SD/HD | Slew rate mode select | Low = ST 292/424 fast mode (90–130 ps); high = ST 259 slow mode (400–800 ps); sets rise/fall timing per standard. |
| RREF | Output amplitude reference | Connect 750 Ω ±1% resistor to VCC to set nominal 800 mVP–P output; placement critical to minimize parasitic capacitance. |
| VCC | Positive supply | 3.3-V main power rail; requires local 0.1-µF bypass capacitor placed adjacent to pin per layout guidelines. |
| VEE | Ground reference | System ground (0 V); connects to PCB ground plane; EP pad must also connect to same ground plane via vias. |
Key Features
| Feature | Design Value |
|---|---|
| ST 424/292/259 Compliance | Hardware-configurable via SD/HD pin to meet exact SMPTE rise/fall, jitter, and return loss requirements for each standard. |
| Adjustable Output Amplitude | 720–880 mVP–P set by single external RREF resistor (750 Ω), eliminating need for trimming or calibration. |
| Output Driver Power-Down | ENABLE pin reduces supply current from 59 mA to 33 mA (HD mode), enabling dynamic power management in multi-channel systems. |
| Single 3.3-V Operation | Eliminates dual-rail supplies and level shifters; compatible with standard LDOs and PMICs in broadcast video signal chains. |
| Industrial Temperature Range | −40°C to +85°C operation validated across full electrical specs, supporting rack-mounted and field-deployable equipment. |
Applications
| Video Routing Switches | Distribution Amplifiers |
|---|---|
Use Scenario: High-density SDI video routing matrix handling multiple 3G-SDI inputs/outputs in broadcast control rooms. IC Role / Device Role / Timing Role: Cable driver providing impedance-matched, low-jitter 75-Ω output buffering between crosspoint switch and BNC connectors. Use Value: Maintains SMPTE ST 424 eye integrity over 100+ meters of Belden 1694A coax with <20 psP–P additive jitter and ≥15 dB return loss. |
Use Scenario: One-to-many SDI signal fanout for studio monitors, recording devices, and on-air processors. IC Role / Device Role / Timing Role: Output driver delivering identical amplitude and timing across parallel 75-Ω outputs with matched rise/fall times. Use Value: Enables simultaneous distribution of HD/3G-SDI signals without skew-induced eye closure; TMATCH ≤30 ps ensures channel alignment. |
| Camera Interface Modules | Production Switchers |
Use Scenario: Embedded SDI transmitter in professional camera back-end processing boards requiring compact, low-power drivers. IC Role / Device Role / Timing Role: Final-stage driver converting FPGA-generated serial video to SMPTE-compliant coax output. Use Value: 165 mW HD-mode power consumption and 4.0 mm × 4.0 mm WQFN footprint support space-constrained camera electronics. |
Use Scenario: Real-time video switching engine with >32 channels of HD/3G-SDI I/O requiring deterministic timing and low crosstalk. IC Role / Device Role / Timing Role: Output buffer isolating switch fabric from cable loading while preserving edge fidelity and jitter budget. Use Value: Dual-slew-rate capability allows one design to support both legacy SD (ST 259) and modern 3G (ST 424) workflows without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SDI cable driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH0031SQ/NOPB | Lower data rate (1.5 Gbps), no SD/HD slew select, fixed 800 mVP–P output, same WQFN-16 package. | Only suitable for HD-SDI (ST 292) and DVB-ASI; cannot support 3G-SDI (ST 424) or dual-standard systems. | Select when 3G-SDI capability is unnecessary and cost optimization is prioritized over flexibility. |
| GS2978-INE3 | Gennum (now Renesas) part; pinout incompatible; requires different RREF network (1.2 kΩ); higher 200 mW power draw. | Legacy drop-in replacement per TI documentation; lacks ENABLE pin control and has tighter layout constraints for return loss. | Choose only for direct legacy board refresh where GS2978 was previously used and redesign is not feasible. |
Compared with LMH0302SQ/NOPB, LMH0031SQ/NOPB sacrifices 3G-SDI support and slew-rate flexibility for lower cost, while GS2978-INE3 requires PCB layout changes and offers no power-down control-making LMH0302SQ/NOPB the optimal choice for new 3G-capable, power-aware broadcast designs.
Availability
LMH0302SQ/NOPB is available at Aetrix Electronics and suitable for broadcast video routing switches, distribution amplifiers, camera interface modules, and production switchers requiring stable component supply across long product lifecycles.
Supply support for LMH0302SQ/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 LMH0302SQ/NOPB belongs to TI's high-speed interface product line, engineered specifically for SMPTE-compliant serial digital video transport in broadcast infrastructure-emphasizing signal integrity, standard compliance, and thermal efficiency.
FAQ
What standards does the LMH0302SQ/NOPB support?
The LMH0302SQ/NOPB supports SMPTE ST 424 (3G-SDI), ST 292 (HD-SDI), and ST 259 (SD-SDI) standards, as well as DVB-ASI at 270 Mbps. It meets all relevant electrical requirements-including rise/fall time, jitter, return loss, and amplitude-for each standard when configured correctly via the SD/HD and RREF pins. The LMH0302SQ/NOPB is explicitly validated for use with Belden 1694A and 8281 coaxial cables.
How is output amplitude controlled on the LMH0302SQ/NOPB?
Output amplitude on the LMH0302SQ/NOPB is set by an external resistor connected between the RREF pin and VCC. A 750 Ω ±1% resistor yields a nominal 800 mVP–P swing into a 75-Ω load. The LMH0302SQ/NOPB datasheet specifies amplitude ranges from 720 mVP–P to 880 mVP–P depending on RREF value, and recommends placing this resistor close to the RREF pin with removed copper beneath to minimize parasitic capacitance.
What is the function of the SD/HD pin on the LMH0302SQ/NOPB?
The SD/HD pin on the LMH0302SQ/NOPB selects output slew rate to comply with either SD-SDI (ST 259) or HD/3G-SDI (ST 292/424) standards. When SD/HD = high, rise/fall times are 400–800 ps for ST 259; when SD/HD = low, they are 90–130 ps for ST 292/424. This pin directly configures the driver's timing response without software or external components, ensuring SMPTE eye mask compliance.
Does the LMH0302SQ/NOPB require AC coupling on its inputs and outputs?
Yes-the LMH0302SQ/NOPB requires AC coupling on both inputs (SDI/SDI) and outputs (SDO/SDO) to meet SMPTE specifications. Input AC coupling is typically implemented with 49.9 Ω series termination and optional capacitor; output AC coupling mandates 4.7 µF capacitors per SDO/SDO to prevent low-frequency DC wander. The LMH0302SQ/NOPB's self-biased inputs accept either AC- or DC-coupled signals, but AC coupling is mandatory for SMPTE compliance.
What thermal considerations apply to the LMH0302SQ/NOPB in continuous operation?
The LMH0302SQ/NOPB has a junction-to-ambient thermal resistance (RθJA) of 47.8°C/W in its 16-pin WQFN package. To maintain safe operation at maximum ambient temperature (85°C), the PCB must incorporate the exposed thermal pad (EP) connected to ground via ≥4 vias, and ensure adequate copper area for heat spreading. At 165 mW HD-mode dissipation, junction temperature rise is ~7.9°C above ambient-well within the 100°C max operating junction limit.
LMH0302SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Driver
- Applications:
- Professional Video
- Standards:
- DVB-ASI, SMPTE
- Control Interface:
- Serial
- Voltage - Supply:
- 3.13V ~ 3.46V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-WQFN (4x4)
LMH0302SQ/NOPB FAQ
1.How can I place an order for LMH0302SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH0302SQ/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 LMH0302SQ/NOPB reliable?
The price and inventory of LMH0302SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH0302SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH0302SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH0302SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH0302SQ/NOPB?
LMH0302SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH0302SQ/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 LMH0302SQ/NOPB?
For technical support, including LMH0302SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH0302SQ/NOPB requirements.
6.How does Aetrix verify that LMH0302SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH0302SQ/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 LMH0302SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH0302SQ/NOPB?
All LMH0302SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH0302SQ/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 LMH0302SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH0302SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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