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Texas Instruments LM6172IM/NOPB
- Part No.:
- LM6172IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM6172IM/NOPB.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,915
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Product details
Overview
LM6172IM/NOPB from Texas Instruments is a dual, high-speed, voltage-feedback operational amplifier optimized for video, communications, and instrumentation systems. It delivers 100MHz unity-gain bandwidth, 3000V/μs slew rate, ±15V or ±5V operation, 50mA output current per channel, and 2.3mA supply current per channel - enabling high-fidelity signal amplification in NTSC/PAL video drivers and ADSL line drivers.
For engineers reviewing the LM6172IM/NOPB datasheet, LM6172IM/NOPB pinout, LM6172IM/NOPB application, or LM6172IM/NOPB equivalent, key selection criteria include unity-gain stability, capacitive-load drive capability, low distortion (–93dBc HD3 at 10kHz), differential gain/phase accuracy (0.28%/0.6°), and SOIC-8 thermal performance (RθJA = 172°C/W).
Technical Context
The LM6172IM/NOPB employs a complementary bipolar process with symmetrical Class AB input stage and triple-buffered output stage, delivering fast settling (65ns to 0.1%) and low crosstalk (<–40dB at 10MHz). Its voltage-feedback architecture provides predictable gain-bandwidth tradeoffs and stable behavior under varying load conditions including 75Ω video termination.
It supports dual-supply operation across ±5V to ±15V, with rail-to-rail input common-mode range (±13.5V @ ±15V) and output swing of ±13.2V (RL = 1kΩ). Input-referred noise is 12nV/√Hz at 10kHz, and phase margin is 40° in SOIC-8 package - ensuring robust stability in unity-gain and G = +2 configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-gain bandwidth | 100MHz (D package): enables stable G = 1 video buffer operation up to ~30MHz video bandwidth |
| Slew rate | 3000V/μs: supports full-swing 10VPP pulses in <3.3ns without slewing distortion |
| Supply current per channel | 2.3mA (typ): draws only 4.6mA total quiescent current, reducing thermal load in dual-channel designs |
| Output current per channel | 50mA (continuous): drives 75Ω video loads or 100Ω ADC/DAC buffers without external boost |
| Input offset voltage | 0.4mV (typ @ ±15V): ensures <0.01% gain error in precision I-to-V converters for scanner applications |
| Harmonic distortion | –93dBc HD3 @ 10kHz: preserves signal fidelity in multimedia broadcast and pulse amplification |
| Common-mode rejection | 70dB (min): maintains accuracy in noisy industrial environments with ground offsets |
Pinout & Package
LM6172IM/NOPB is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance is RθJA = 172°C/W, suitable for moderate-power analog signal chains without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Channel 1 output | Low-impedance buffered output capable of sourcing/sinking 50mA into 100Ω loads |
| 1IN– | Channel 1 inverting input | Differential input node; connects to feedback network for inverting gain configurations |
| 1IN+ | Channel 1 noninverting input | High-impedance input (40MΩ common-mode); used in noninverting buffers and I-to-V converters |
| VCC– | Negative power supply | Accepts –5V to –15V; must be decoupled with 0.1μF ceramic capacitor near pin |
| 2IN+ | Channel 2 noninverting input | Independent high-Z input; enables dual-channel synchronous signal processing |
| 2IN– | Channel 2 inverting input | Separate feedback node; allows independent gain setting per channel |
| 2OUT | Channel 2 output | Fully isolated output; crosstalk rejection >–40dB at 10MHz minimizes inter-channel interference |
| VCC+ | Positive power supply | Accepts +5V to +15V; requires local 0.1μF + 10μF decoupling for high-frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable | Operates reliably with no external compensation in G = 1, G = –1, or G = +2 configurations |
| Capacitive-load drive | Stable with ≥100pF output capacitance; recommended series input resistor (1kΩ) reduces overshoot |
| Dual-channel isolation | Typical crosstalk <–40dB at 10MHz enables independent channel use in composite video or stereo ADC buffering |
| Low-distortion video performance | Differential gain/phase of 0.28%/0.6° meets NTSC/PAL broadcast standards for color fidelity |
| Wide supply range | Specified for ±5V (portable video) and ±15V (ADSL/scanner) rails - single BOM supports multiple platforms |
Applications
| Scanner I-to-V Converters | ADSL/HDSL Line Drivers |
|---|---|
Use Scenario: Converts photodiode current from high-resolution document scanners into precise voltage signals for digitization. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current (1.2μA typ) and low offset (0.4mV) to preserve dynamic range. Use Value: Enables 12-bit+ linearity in optical sensing by minimizing DC error and maintaining 100MHz bandwidth for fast scan rates. | Use Scenario: Drives twisted-pair telephone lines in asymmetric digital subscriber line transceivers requiring high output current and low distortion. IC Role / Device Role / Timing Role: High-slew-rate line driver operating at ±15V with 50mA output capability and –50dBc HD3 at 5MHz. Use Value: Supports >8Mbps downstream data rates while meeting ITU-T G.992.1 spectral mask requirements via clean large-signal response. |
| NTSC/PAL Video Amplifiers | ADC/DAC Buffers |
Use Scenario: Amplifies composite video signals in broadcast equipment, set-top boxes, and professional monitors. IC Role / Device Role / Timing Role: 75Ω-terminated video buffer with 0.28% differential gain and 0.6° differential phase at 3.58MHz. Use Value: Preserves color saturation and timing integrity across full NTSC/PAL bandwidth without external peaking networks. | Use Scenario: Isolates and drives high-speed analog-to-digital and digital-to-analog converters in test equipment and data acquisition systems. IC Role / Device Role / Timing Role: Low-noise (12nV/√Hz), fast-settling (65ns) buffer between FPGA DAC outputs and 50Ω transmission lines. Use Value: Prevents code-dependent distortion and maintains SFDR >70dB through accurate gain matching and channel-to-channel tracking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM6171MF/NOPB | Single-channel version; identical specs except channel count and package (SOT-23-5) | Used where space-constrained PCBs require single-amplifier placement or staggered channel routing | Select when only one high-speed amplifier is needed and board area is critical |
| THS3202D | Higher slew rate (4700V/μs), lower noise (8.5nV/√Hz), but higher supply current (6.5mA/ch) and not unity-gain stable | Requires external compensation for G = 1; preferred in pulse amplification where speed outweighs power budget | Choose for ultrafast pulse applications where stability can be managed via feedback network design |
Compared with LM6171MF/NOPB, LM6172IM/NOPB provides dual-channel integration without performance trade-offs; versus THS3202D, it offers plug-and-play unity-gain stability and lower power at the cost of peak slew rate - making it optimal for video, communications, and instrumentation where reliability and ease of use are prioritized.
Availability
LM6172IM/NOPB is available at Aetrix Electronics and suitable for video amplification, DSL line driving, and precision instrumentation requiring stable component supply, long-term manufacturability, and TI's industry-standard SOIC-8 footprint compatibility.
Supply support for LM6172IM/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 over 90 years of innovation in high-performance analog ICs.
The LM6172IM/NOPB belongs to TI's high-speed voltage-feedback op-amp product line, engineered for demanding signal-chain applications including broadcast video, wired communications, and precision test equipment where bandwidth, linearity, and dual-channel integration are essential.
FAQ
What supply voltages does the LM6172IM/NOPB support?
The LM6172IM/NOPB operates over ±5V to ±15V dual supplies. It is fully specified at both ±5V (for portable video systems) and ±15V (for ADSL, scanners, and ultrasound), with guaranteed performance across –40°C to +85°C ambient temperature. The device draws only 2.3mA per channel at ±15V, enabling efficient high-voltage operation without excessive power dissipation.
Is the LM6172IM/NOPB unity-gain stable?
Yes, the LM6172IM/NOPB is explicitly unity-gain stable and requires no external compensation. Its internal compensation ensures stable operation in G = +1, G = –1, and G = +2 configurations - verified across temperature and supply variations. This simplifies design in video buffers, I-to-V converters, and other unity-gain-critical applications without risk of oscillation.
Can the LM6172IM/NOPB drive 75Ω video loads?
Yes, the LM6172IM/NOPB delivers 50mA per channel and sustains ±13.2V output swing into 1kΩ, enabling direct 75Ω termination with appropriate gain-setting resistors. Its differential gain/phase of 0.28%/0.6° at 3.58MHz meets NTSC/PAL broadcast standards, and its low distortion (–93dBc HD3) preserves chroma fidelity without external peaking components.
What is the thermal performance of the LM6172IM/NOPB in SOIC-8 package?
The LM6172IM/NOPB in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 172°C/W. At ±15V operation, its quiescent power is 138mW, resulting in ~24°C junction rise above ambient under still-air conditions - well within safe limits for continuous operation. Board-level copper pour further improves thermal margin.
How does the LM6172IM/NOPB handle capacitive loads?
The LM6172IM/NOPB remains stable with output capacitances ≥100pF. For larger capacitive loads (e.g., coaxial cables), a small series resistor (1kΩ) at the input reduces slew-induced overshoot and improves settling time. Unlike many high-speed op-amps, it does not require isolation resistors in series with the output - preserving signal integrity in video and communication paths.
LM6172IM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 3000V/µs
- Gain Bandwidth Product:
- 100 MHz
- -3db Bandwidth:
- 160 MHz
- Current - Input Bias:
- 1.2 µA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 4.6mA (x2 Channels)
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 5.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM6172IM/NOPB FAQ
1.How can I place an order for LM6172IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM6172IM/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 LM6172IM/NOPB reliable?
The price and inventory of LM6172IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM6172IM/NOPB is usually 5 days.
3.What payment methods are accepted for LM6172IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM6172IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM6172IM/NOPB?
LM6172IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM6172IM/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 LM6172IM/NOPB?
For technical support, including LM6172IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM6172IM/NOPB requirements.
6.How does Aetrix verify that LM6172IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM6172IM/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 LM6172IM/NOPB meets industry standards.
7.What is the process for return or replacement of LM6172IM/NOPB?
All LM6172IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM6172IM/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 LM6172IM/NOPB part is unused and in its original packaging.
Return procedure for LM6172IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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