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Texas Instruments LMH6672MA/NOPB
- Part No.:
- LMH6672MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6672MA/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:255
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Product details
Overview
LMH6672MA/NOPB from Texas Instruments is a dual, high-speed, high-output-current voltage-feedback operational amplifier optimized for xDSL line driving. It delivers ±200 mA output current at 9.6 VPP single-ended into 25 Ω, achieves 90 MHz −3 dB bandwidth (G = +2), and maintains −105 dBc SFDR at 100 kHz with 8.4 VPP swing-enabling full-rate ADSL upstream compliance in PCI modem cards.
For engineers reviewing the LMH6672MA/NOPB datasheet, LMH6672MA/NOPB pinout, LMH6672MA/NOPB application, or LMH6672MA/NOPB equivalent, this page provides verified specifications, SOIC-8 pin mapping, differential/line-driver use cases, thermal performance data, and two validated alternative op amps for xDSL and high-current analog signal paths.
Technical Context
The LMH6672MA/NOPB employs a Class AB output stage with 4.8 mA idle current per channel, enabling high-current drive while maintaining low distortion across 5 V to 12 V supplies. Its architecture supports stable operation at gains ≥ +2 V/V and delivers rail-to-rail output swing within 1 V of supply rails under load.
It features matched input bias currents (±16 µA max), 3.1 nV/√Hz input voltage noise, and 1.8 pA/√Hz input current noise-critical for preserving SNR in broadband line drivers. Common-mode rejection exceeds 150 dB at DC and remains >75 dB up to 1 MHz, ensuring robustness against supply and coupling noise in noisy DSL environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 90 MHz at G = +2: supports full-rate ADSL upstream signaling up to 1.1 MHz with ample gain margin. |
| Slew Rate | 135 V/µs: enables clean 4 V step response in ≤23.5 ns, critical for fast transient fidelity in line drivers. |
| Output Current | ±200 mA @ 9.6 VPP, RL = 25 Ω: drives transformer-coupled 50 Ω loads without clipping or thermal foldback. |
| Harmonic Distortion | −105 dBc 2nd HD @ 100 kHz, 8.4 VPP: meets ITU-T G.992.1 upstream spectral mask requirements. |
| Supply Range | ±2.5 V to ±6.5 V (5 V to 13 V total): compatible with standard PCI card 5 V and industrial 12 V rails. |
| Input Noise | 3.1 nV/√Hz + 1.8 pA/√Hz: low-noise front-end suitable for high-gain, wideband active filter stages. |
| Quiescent Current | 7.2 mA per amplifier: balances power efficiency with high-output capability in dual-channel designs. |
Pinout & Package
LMH6672MA/NOPB is housed in an 8-pin SOIC (D) package (4.89 mm × 3.90 mm), optimized for automated assembly and thermal management on standard PCBs. The exposed pad variant (DDA) is not used in this part number.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | High-current output node capable of ±200 mA sink/source; requires local 0.1 µF bypass to V− and V+. |
| 2 (−IN A) | Channel A inverting input | High-impedance node; connects to feedback network (e.g., Rf = 470 Ω) for precise gain setting. |
| 3 (+IN A) | Channel A non-inverting input | DC-biased reference point; common-mode range extends to within 1 V of rails for single-supply flexibility. |
| 4 (V−) | Negative supply | Ground or negative rail connection; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| 5 (+IN B) | Channel B non-inverting input | Independent input for second channel; electrically isolated from Channel A except via shared supplies. |
| 6 (−IN B) | Channel B inverting input | Configurable for differential output mode when paired with Channel A (e.g., transformer-coupled line driver). |
| 7 (OUT B) | Channel B output | Matched output performance to OUT A; enables true dual-channel or complementary output configurations. |
| 8 (V+) | Positive supply | Primary power rail; supplies both amplifiers; thermal design must account for 172°C/W θJA. |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-output-current channels | Each channel delivers ±200 mA into 25 Ω, enabling independent or interleaved line-driving topologies. |
| Rail-to-rail output swing | Swings to within 1 V of V+ and V− at full load, maximizing dynamic range in 5 V–12 V systems. |
| Low distortion at high frequency | −98 dBc SFDR @ 1 MHz, 2 VPP, RL = 100 Ω ensures clean DMT symbol transmission in xDSL. |
| Stable at G ≥ +2 V/V | No external compensation required for unity-gain stable alternatives; simplifies layout and reduces BOM count. |
| Wide supply range | Operates from ±2.5 V to ±6.5 V, supporting legacy 5 V and modern 12 V telecom power architectures. |
Applications
| ADSL PCI Modem Card | xDSL External Modem |
|---|---|
|
Use Scenario: Full-rate ADSL upstream transmission on PCI-based CPE with transformer-coupled line interface. IC Role / Device Role / Timing Role: Dual-channel differential line driver delivering 16.8 VPP into 50 Ω load with −98 dBc distortion. Use Value: Meets ITU-T G.992.1 peak upstream power and spectral mask requirements without external current boosters. |
Use Scenario: High-density xDSL modem with multiple simultaneous line ports requiring compact dual op-amp solution. IC Role / Device Role / Timing Role: Independent channel configuration for multi-line POTS splitter or VDSL2 vectoring front-end. Use Value: Reduces component count by 50% vs. two discrete single-channel op-amps while maintaining thermal headroom. |
| Active Line Driver | High-Speed Active Filter |
|
Use Scenario: Low-impedance (<100 Ω) analog signal distribution in test equipment or broadcast infrastructure. IC Role / Device Role / Timing Role: High-current buffer isolating DAC output from reactive cable loads. Use Value: Maintains 90 MHz bandwidth into 25 Ω, preventing phase shift and settling errors in fast pulse applications. |
Use Scenario: 4th-order elliptic low-pass filter for anti-aliasing in 10+ MSPS data acquisition systems. IC Role / Device Role / Timing Role: Gain stage and output driver in active filter topology with 135 V/µs slew rate. Use Value: Preserves transient response integrity and minimizes group delay distortion across 0–10 MHz passband. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current, high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6624MA/NOPB | Single-channel, 1.5 GHz GBW, lower output current (±100 mA), higher noise (4.3 nV/√Hz). | Better suited for pre-amplifier or IF gain stages than line driving; lacks dual-channel integration. | Select when ultra-wide bandwidth is prioritized over output drive and channel density. |
| THS3202D | Dual-channel, 1.8 GHz GBW, ±250 mA output, but higher quiescent current (12.5 mA/amp) and no SOIC option. | Requires SO PowerPAD or QFN layout; better for >100 MHz RF applications than DSL-compliant line driving. | Choose when >100 MHz small-signal bandwidth and higher output current justify thermal redesign. |
Compared with LMH6672MA/NOPB, LMH6624MA/NOPB trades dual-channel integration and output drive for bandwidth, while THS3202D offers higher speed and current at the cost of power efficiency and SOIC compatibility-making LMH6672MA/NOPB optimal for cost-sensitive, thermally constrained xDSL line cards.
Availability
LMH6672MA/NOPB is available at Aetrix Electronics and suitable for ADSL PCI modem cards, xDSL external modems, and active line drivers requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support (−40°C to +150°C).
Supply support for LMH6672MA/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 and embedded processing technologies, with decades of expertise in high-performance op amps and communications ICs.
The LMH6672MA/NOPB belongs to TI's high-output-current op amp product line, designed specifically for broadband line driver applications in DSL, fiber access, and high-fidelity analog signal distribution systems.
FAQ
What is the maximum output voltage swing of LMH6672MA/NOPB into a 25 Ω load?
The LMH6672MA/NOPB delivers ±4.8 V output swing into a 25 Ω load at ±6 V supply, achieving 9.6 VPP single-ended or 19.2 VPP differential. This is confirmed in the Electrical Characteristics table (Section 6.5) under VO, RL = 25 Ω, VS = ±6 V, and is sufficient for full-rate ADSL upstream compliance.
Is LMH6672MA/NOPB stable at unity gain?
No, LMH6672MA/NOPB is specified stable only for gains of +2 V/V or higher. The datasheet explicitly states "Stable for Gain of +2V/V or Higher" in Features and recommends minimum G = +2 to avoid peaking or oscillation. Unity-gain operation requires external compensation not validated by TI.
Does LMH6672MA/NOPB support single-supply operation?
Yes, LMH6672MA/NOPB operates from 5 V to 12 V total supply (e.g., V+ = 5 V, V− = 0 V), with input common-mode range extending to within 1 V of either rail and output swing to within 1 V of each supply. This is verified in Section 6.3 (Recommended Operating Conditions) and Figure 1–5 (Output Swing curves).
What is the thermal resistance (θJA) of the LMH6672MA/NOPB SOIC package?
The LMH6672MA/NOPB in SOIC (D) package has a junction-to-ambient thermal resistance (θJA) of 172°C/W, as documented in Section 6.4 (Thermal Information). This value assumes standard JEDEC 2-layer board conditions and must be used with ambient temperature limits (≤85°C) to ensure junction temperature stays below 150°C.
Can LMH6672MA/NOPB drive a 50 Ω differential load directly?
Yes-when configured as a differential pair (e.g., Channel A and B with inverted feedback), LMH6672MA/NOPB drives 50 Ω loads to 16.8 VPP with −98 dBc distortion, as stated in the Description section and validated in Typical Performance Characteristics (Figure 20–24). No external current buffers are needed for ADSL-compliant line driving.
LMH6672MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 135V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 90 MHz
- Current - Input Bias:
- 8 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 7.2mA (x2 Channels)
- Current - Output / Channel:
- 525 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMH6672MA/NOPB FAQ
1.How can I place an order for LMH6672MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6672MA/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 LMH6672MA/NOPB reliable?
The price and inventory of LMH6672MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6672MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6672MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6672MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6672MA/NOPB?
LMH6672MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6672MA/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 LMH6672MA/NOPB?
For technical support, including LMH6672MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6672MA/NOPB requirements.
6.How does Aetrix verify that LMH6672MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6672MA/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 LMH6672MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6672MA/NOPB?
All LMH6672MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6672MA/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 LMH6672MA/NOPB part is unused and in its original packaging.
Return procedure for LMH6672MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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