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Texas Instruments LMH6672MR/NOPB
- Part No.:
- LMH6672MR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMH6672MR/NOPB.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:299
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Product details
Overview
LMH6672MR/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 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 LMH6672MR/NOPB datasheet, LMH6672MR/NOPB pinout, LMH6672MR/NOPB application, or LMH6672MR/NOPB equivalent, key selection criteria include differential output drive capability, rail-to-rail output swing (within 1 V of supplies), thermal performance in SO PowerPAD package, and stability at minimum gain of +2 V/V.
Technical Context
The LMH6672MR/NOPB integrates two independent high-slew-rate amplifiers (135 V/µs) with class-AB output stages optimized for low-impedance loads (25–100 Ω). Its architecture supports single-supply operation from 5 V to 12 V and delivers 19.2 VPP differential output across 50 Ω while maintaining SFDR >105 dB at 100 kHz.
It features input common-mode range extending to within 1.0 V of V− and 4.5 V of V+ (at ±6 V), CMRR ≥150 dB, PSRR ≥72 dB, and operates across −40°C to +150°C - making it suitable for xDSL CPE line drivers where thermal robustness and distortion-limited signal fidelity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 90 MHz at G = +2 - enables wideband DSL signal amplification up to full-rate ADSL upstream frequencies. |
| Slew Rate | 135 V/µs - supports fast transient response for high-fidelity pulse and DMT symbol reproduction. |
| Output Current | ±200 mA @ VO = 9 VPP, VS = 12 V - drives 25 Ω loads directly without external buffers. |
| Distortion (SFDR) | 105 dB @ 100 kHz, 8.4 VPP, RL = 25 Ω - meets stringent upstream spectral mask requirements for ADSL. |
| Supply Range | ±2.5 V to ±6.5 V (5 V to 13 V total) - compatible with standard PCI modem card and xDSL CPE power rails. |
| Input Noise | 3.1 nV/√Hz - preserves SNR in high-gain, low-level signal conditioning stages. |
| Operating Temp | −40°C to +150°C - qualified for industrial and extended-temperature embedded line driver environments. |
Pinout & Package
LMH6672MR/NOPB uses an 8-pin SO PowerPAD (DDA) package with exposed thermal pad (internally floating), 4.89 mm × 3.90 mm body size, and moisture sensitivity level (MSL) 3 (168 hr).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Channel A output | High-current output capable of sourcing/sinking ±200 mA into 25 Ω load. |
| 2 (−IN A) | Channel A inverting input | Differential input node for closed-loop configuration; supports unity-gain stable operation only at G ≥ +2. |
| 3 (+IN A) | Channel A non-inverting input | High-impedance input (IB = 8–16 µA); common-mode range extends to within 1 V of supplies. |
| 4 (V−) | Negative supply rail | Accepts −2.5 V to −6.5 V; must be bypassed locally with low-ESR capacitor for stability. |
| 5 (+IN B) | Channel B non-inverting input | Independent second channel input; identical electrical specs to Channel A. |
| 6 (−IN B) | Channel B inverting input | Enables dual-channel differential driver configuration (e.g., transformer-coupled line interface). |
| 7 (OUT B) | Channel B output | Matches OUT A performance; used with OUT A for balanced 19.2 VPP differential drive. |
| 8 (V+) | Positive supply rail | Accepts +2.5 V to +6.5 V; thermal pad must be soldered to PCB ground plane for optimal RθJA = 58.6°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| High Output Drive | ±200 mA continuous output current per channel enables direct drive of 25 Ω line termination without external buffers. |
| Low Distortion | −98 dBc 2nd harmonic at 1 MHz, 2 VPP, RL = 100 Ω ensures compliance with ADSL upstream spectral masks. |
| Rail-to-Rail Output Swing | Swings to within 1 V of both supply rails (e.g., ±4.8 V at ±6 V supply), maximizing dynamic range in single-supply systems. |
| Thermally Optimized Package | SO PowerPAD (DDA) reduces junction-to-ambient thermal resistance to 58.6°C/W - critical for sustained high-power line driving. |
| Stable at Minimum Gain | Unity-gain stable only above G = +2 V/V; eliminates need for external compensation in standard line driver configurations. |
Applications
| ADSL PCI Modem Card | xDSL External Modem |
|---|---|
|
Use Scenario: Integrated line driver on PCI-based ADSL modem cards requiring compact, thermally efficient analog front-end. IC Role / Device Role / Timing Role: Dual-channel op amp configured as differential output driver feeding 1:2 transformer for upstream signal transmission. Use Value: Delivers 19.2 VPP differential swing into 50 Ω with −98 dBc distortion, meeting full-rate ADSL upstream peak power requirements. |
Use Scenario: High-reliability line driver in consumer xDSL modems operating in uncontrolled ambient temperatures. IC Role / Device Role / Timing Role: Dual op amp providing single-ended or differential output drive for POTS splitterless line interface. Use Value: −40°C to +150°C operating range and SO PowerPAD thermal design ensure stable performance across residential deployment environments. |
| DSLAM Line Card | Active Filter Interface |
|
Use Scenario: Upstream signal conditioning stage in carrier-grade DSL access multiplexer (DSLAM) line cards. IC Role / Device Role / Timing Role: High-current buffer amplifying DAC outputs before transformer coupling to twisted-pair subscriber lines. Use Value: 135 V/µs slew rate and 90 MHz bandwidth preserve DMT symbol integrity during high-speed upstream burst transmission. |
Use Scenario: Low-distortion gain stage in active analog filters for broadband test equipment and signal generators. IC Role / Device Role / Timing Role: Voltage-feedback op amp implementing high-Q, low-noise filter transfer functions with minimal phase error. Use Value: 3.1 nV/√Hz input noise and 105 dB SFDR at 100 kHz maintain signal purity in precision frequency-selective circuits. |
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 (D) package with RθJA = 172°C/W - higher thermal resistance than LMH6672MR/NOPB's SO PowerPAD. | Limited to lower continuous output power or forced-air-cooled environments due to reduced thermal performance. | Select when board space constraints prohibit thermal pad layout or when legacy SOIC footprint compatibility is required. |
| THS3091D | Single-channel, 210 mA output, 200 MHz bandwidth, but higher supply current (11.5 mA/amp) and no guaranteed stability at G = +2. | Requires two devices for dual-channel operation; lacks integrated thermal solution for sustained high-power drive. | Choose for higher bandwidth needs (>135 MHz) where dual-channel integration is not mandatory and thermal management is externally controlled. |
Compared with LMH6672MA/NOPB, LMH6672MR/NOPB provides 66% lower thermal resistance for equivalent power dissipation, enabling higher ambient temperature operation; versus THS3091D, it offers integrated dual-channel functionality and guaranteed +2 V/V stability - reducing component count and layout complexity in xDSL line driver designs.
Availability
LMH6672MR/NOPB is available at Aetrix Electronics and suitable for xDSL line drivers, ADSL PCI modem cards, and active filter interfaces requiring stable component supply, extended temperature operation, and high-output-current analog signal conditioning.
Supply support for LMH6672MR/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 amps and communications infrastructure ICs.
The LMH6672MR/NOPB belongs to TI's high-output-current op amp product line, engineered specifically for xDSL line driver applications where low distortion, high current drive, and thermal resilience are essential.
FAQ
What is the maximum output voltage swing of LMH6672MR/NOPB into a 25 Ω load?
The LMH6672MR/NOPB delivers ±4.8 V output swing into a 25 Ω load at ±6 V supply, corresponding to 9.6 VPP single-ended or 19.2 VPP differential. This rail-to-rail capability-within 1 V of each supply rail-enables maximum dynamic range in line driver applications without external level-shifting circuitry. Performance is specified across −40°C to +125°C.
Is LMH6672MR/NOPB stable at unity gain?
No, LMH6672MR/NOPB is not unity-gain stable. It is specified and guaranteed stable only for closed-loop gains of +2 V/V or higher. Attempting unity-gain operation may cause oscillation or excessive ringing. The datasheet explicitly states "Stable for Gain of +2V/V or Higher" as a key feature, and all AC performance metrics assume G = +2 configuration.
How does the SO PowerPAD package of LMH6672MR/NOPB improve thermal performance?
The SO PowerPAD (DDA) package of LMH6672MR/NOPB reduces junction-to-ambient thermal resistance to 58.6°C/W-versus 172°C/W for the SOIC variant-by incorporating an exposed thermal pad. When soldered to a PCB ground plane, this pad significantly enhances heat conduction away from the die, allowing sustained high-current operation (e.g., ±200 mA) at elevated ambient temperatures up to +85°C without exceeding the 150°C max junction limit.
What distortion performance does LMH6672MR/NOPB achieve at 1 MHz?
At 1 MHz, LMH6672MR/NOPB achieves −90 dBc 2nd harmonic distortion and −87 dBc 3rd harmonic distortion with 8.4 VPP output into 25 Ω, and −98 dBc 2nd harmonic with 2 VPP into 100 Ω. These values meet ADSL upstream spectral mask requirements and confirm suitability for broadband communication line drivers where signal purity is critical.
Can LMH6672MR/NOPB operate from a single 5 V supply?
Yes, LMH6672MR/NOPB supports single-supply operation from 5 V (i.e., V+ = 5 V, V− = 0 V), with input common-mode range extending down to 0 V and output swing reaching within 1 V of ground. Its specified operating range is ±2.5 V to ±6.5 V (5 V to 13 V total), making it fully compatible with 5 V-only systems such as USB-powered xDSL modems or embedded line interface modules.
LMH6672MR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 8-PowerSOIC (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-SO PowerPad
LMH6672MR/NOPB FAQ
1.How can I place an order for LMH6672MR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6672MR/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 LMH6672MR/NOPB reliable?
The price and inventory of LMH6672MR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6672MR/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6672MR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6672MR/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6672MR/NOPB?
LMH6672MR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6672MR/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 LMH6672MR/NOPB?
For technical support, including LMH6672MR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6672MR/NOPB requirements.
6.How does Aetrix verify that LMH6672MR/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6672MR/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 LMH6672MR/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6672MR/NOPB?
All LMH6672MR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6672MR/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 LMH6672MR/NOPB part is unused and in its original packaging.
Return procedure for LMH6672MR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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