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Texas Instruments LMH6672LD/NOPB
- Part No.:
- LMH6672LD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LMH6672LD/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,576
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Product details
Overview
LMH6672LD/NOPB from Texas Instruments is a dual, high-speed, high-output-current voltage-feedback operational amplifier designed for demanding line driver applications. It delivers ±200 mA output current into 25 Ω at 9.6 VPP, achieves 90 MHz −3 dB bandwidth (G = +2), and maintains −98 dBc distortion at 1 MHz when driving 50 Ω - enabling full-rate upstream ADSL signal transmission.
For engineers reviewing the LMH6672LD/NOPB datasheet, LMH6672LD/NOPB pinout, LMH6672LD/NOPB application, or LMH6672LD/NOPB equivalent, key selection criteria include differential output drive capability, rail-to-rail output swing (within 1 V of supplies), low 3.1 nV/√Hz input noise, stable operation at G ≥ +2, and thermal performance in SOIC-8 packaging under 12-V dual-supply conditions.
Technical Context
The LMH6672LD/NOPB integrates two independent voltage-feedback op amps with Class AB output stages optimized for low-impedance loads (25–100 Ω). Its architecture supports single- or dual-supply operation (5 V to 12 V total), features ±200 mA sourcing/sinking per channel, and maintains stability without external compensation at closed-loop gains ≥ +2 V/V.
It achieves high dynamic performance via 135 V/µs slew rate and 90 MHz bandwidth while delivering low harmonic distortion (−105 dB SFDR @ 100 kHz, 8.4 VPP, 25 Ω) - critical for xDSL line drivers where spectral purity and peak voltage swing directly impact upstream power compliance and bit error rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 90 MHz at G = +2 - enables wideband signal amplification up to ADSL2+ frequencies without gain roll-off. |
| Slew Rate | 135 V/µs - ensures faithful reproduction of fast transient signals (e.g., DMT tones) without slewing-induced distortion. |
| Output Current | ±200 mA per channel into 25 Ω at 9.6 VPP - sufficient to drive transformer-coupled xDSL line interfaces with margin. |
| Input Noise Voltage | 3.1 nV/√Hz - preserves SNR in high-gain, low-level signal conditioning stages before line driver output. |
| Supply Range | ±2.5 V to ±6.5 V (5 V to 13 V total) - supports both 5-V PCI modem cards and 12-V xDSL external modems. |
| Distortion (2nd Harmonic) | −105 dBc @ 100 kHz, 8.4 VPP, 25 Ω - meets stringent upstream spectral mask requirements for full-rate ADSL. |
| Quiescent Current | 7.2 mA per amplifier - balances low power consumption with high output drive capability in thermally constrained designs. |
Pinout & Package
LMH6672LD/NOPB is housed in an 8-pin SOIC (D) package measuring 4.89 mm × 3.90 mm, with standard lead finish (Sn) and MSL Level-1 rating (260°C, unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | Delivers amplified signal; capable of ±200 mA into 25 Ω with rail-to-rail swing (within 1 V of V+ or V−). |
| 2 (−IN A) | Channel A inverting input | Inverts input signal; used with feedback network to set gain and configure differential output topology. |
| 3 (+IN A) | Channel A non-inverting input | Direct signal path input; referenced to common-mode voltage range of −6.0 V to +4.5 V (VS = ±6 V). |
| 4 (V−) | Negative supply | Accepts −2.5 V to −6.5 V; must be decoupled locally to minimize noise coupling into high-speed analog paths. |
| 5 (+IN B) | Channel B non-inverting input | Independent input for second amplifier; enables dual-channel line driver or active filter configurations. |
| 6 (−IN B) | Channel B inverting input | Configures Channel B gain and feedback; supports mirrored or complementary signal processing vs. Channel A. |
| 7 (OUT B) | Channel B output | Matches OUT A performance; used with OUT A to generate 19.2 VPP differential output across 50 Ω load. |
| 8 (V+) | Positive supply | Accepts +2.5 V to +6.5 V; requires low-ESR ceramic bypassing near pin to sustain 135 V/µs slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-output-current amplifiers | Each channel delivers ±200 mA into 25 Ω - eliminates need for external buffer stages in DSL line driver designs. |
| Rail-to-rail output swing | Drives within 1 V of V+ and V− rails - maximizes dynamic range for fixed supply voltages (e.g., ±6 V). |
| Low distortion at high frequency | −98 dBc 2nd harmonic @ 1 MHz, 2 VPP, 100 Ω - ensures compliance with ITU-T G.992.1 upstream spectral masks. |
| Stable at G ≥ +2 V/V | No external compensation required - simplifies layout and reduces BOM count in gain-fixed line driver circuits. |
| Wide supply range | Operates from ±2.5 V to ±6.5 V - supports legacy 5-V systems and modern 12-V xDSL platforms with one footprint. |
Applications
| ADSL PCI Modem Cards | xDSL External Modems |
|---|---|
Use Scenario: High-density PCI add-in cards requiring dual-channel line drivers for simultaneous upstream/downstream signal conditioning. IC Role / Device Role / Timing Role: Dual op amp configured as differential line driver to interface with transformer-coupled telephone line interface. Use Value: Delivers 19.2 VPP differential swing into 50 Ω with −98 dBc distortion - meets full-rate ADSL upstream power and spectral purity requirements. |
Use Scenario: Standalone DSL modems needing robust, thermally efficient line drivers for residential broadband deployment. IC Role / Device Role / Timing Role: Primary line driver IC generating compliant upstream signal on twisted-pair subscriber lines. Use Value: ±200 mA output current and 90 MHz bandwidth support multi-tone DMT signaling up to 1.104 MHz without gain peaking or phase distortion. |
| Line Drivers | Active Filters |
Use Scenario: Industrial or telecom equipment requiring high-fidelity analog signal transmission over low-impedance cables or PCB traces. IC Role / Device Role / Timing Role: Output stage amplifier driving 25–100 Ω loads with minimal THD+N and fast settling. Use Value: 135 V/µs slew rate and 23.5 ns rise/fall time ensure accurate pulse and step response in high-speed data transmission links. |
Use Scenario: Precision analog front-ends requiring low-noise, high-bandwidth filtering before ADC sampling. IC Role / Device Role / Timing Role: Active filter section (e.g., Sallen-Key or MFB) using LMH6672LD/NOPB as gain block and buffer. Use Value: 3.1 nV/√Hz input noise and 150 dB CMRR preserve signal integrity in high-gain, low-level filter topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6672MA/NOPB | Same die, SOIC-8 package with identical electrical specs; differs only in tape-and-reel vs. tube packaging and part marking. | No functional difference; suitable for same ADSL line driver and active filter use cases. | Select LMH6672MA/NOPB for automated assembly; LMH6672LD/NOPB is functionally identical but may reflect specific distribution channel labeling. |
| THS3091D | Single-channel, higher slew rate (2000 V/µs), lower output current (±250 mA), no guaranteed stability at G = +2 - requires external compensation. | Better suited for pulse amplification than continuous-wave DSL line driving due to higher distortion at 1 MHz. | Choose THS3091D only for single-channel, ultra-high-slew applications; LMH6672LD/NOPB remains preferred for dual-channel, low-distortion xDSL line drivers. |
Compared with LMH6672MA/NOPB, LMH6672LD/NOPB offers identical performance in SOIC-8 packaging but may differ in reel/tube configuration and traceability; versus THS3091D, it provides dual-channel integration, guaranteed G ≥ +2 stability, and lower 1-MHz distortion - making it more suitable for cost-sensitive, space-constrained xDSL CPE designs.
Availability
LMH6672LD/NOPB is available at Aetrix Electronics and suitable for ADSL PCI modem cards, xDSL external modems, and industrial line driver applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for LMH6672LD/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-speed op amp design for communications infrastructure.
The LMH6672LD/NOPB belongs to TI's high-output-current op amp product line, engineered specifically for xDSL line driver applications where high voltage swing, low distortion, and thermal efficiency are mandatory in compact SOIC packaging.
FAQ
What is the maximum output voltage swing of LMH6672LD/NOPB into a 25 Ω load?
The LMH6672LD/NOPB delivers ±4.8 V output swing into a 25 Ω load with ±6 V supplies, achieving 9.6 VPP single-ended or 19.2 VPP differential output. This rail-to-rail swing (within 1 V of each supply rail) enables full utilization of available supply headroom in DSL line driver circuits without clipping.
Is LMH6672LD/NOPB stable at unity gain?
No, the LMH6672LD/NOPB is not stable at unity gain. It is specified and guaranteed stable only for closed-loop gains of +2 V/V or higher. Attempting unity-gain operation will result in oscillation or excessive ringing due to its internal compensation optimized for minimum noise and maximum bandwidth at G ≥ +2.
Does LMH6672LD/NOPB support single-supply operation?
Yes, LMH6672LD/NOPB supports true single-supply operation from 5 V to 12 V total supply range. Its input common-mode range extends to within 1.0 V of V− and 1.5 V of V+, and output swings to within 1 V of either rail - enabling use in 5-V systems with proper input biasing and AC-coupled outputs.
What thermal considerations apply to LMH6672LD/NOPB in SOIC-8 packaging?
The LMH6672LD/NOPB in SOIC-8 has a junction-to-ambient thermal resistance (RθJA) of 172°C/W. At ±6 V supplies and full output drive, junction temperature can reach 145°C at 85°C ambient - within the 150°C absolute maximum. Adequate PCB copper area and local decoupling are essential to maintain reliability during sustained high-power operation.
How does LMH6672LD/NOPB compare to LMH6672MR/NOPB?
The LMH6672LD/NOPB and LMH6672MR/NOPB share identical silicon and electrical specifications, but LMH6672MR/NOPB uses the SO PowerPAD (DDA) package with RθJA = 58.6°C/W - offering superior thermal performance for high-duty-cycle or high-ambient applications. LMH6672LD/NOPB is the SOIC-8 variant optimized for cost-sensitive, space-constrained designs where thermal load is moderate.
LMH6672LD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-WSON (4x4)
LMH6672LD/NOPB FAQ
1.How can I place an order for LMH6672LD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6672LD/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 LMH6672LD/NOPB reliable?
The price and inventory of LMH6672LD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6672LD/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6672LD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6672LD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6672LD/NOPB?
LMH6672LD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6672LD/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 LMH6672LD/NOPB?
For technical support, including LMH6672LD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6672LD/NOPB requirements.
6.How does Aetrix verify that LMH6672LD/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6672LD/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 LMH6672LD/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6672LD/NOPB?
All LMH6672LD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6672LD/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 LMH6672LD/NOPB part is unused and in its original packaging.
Return procedure for LMH6672LD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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