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Texas Instruments LM6172IMX
- Part No.:
- LM6172IMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM6172IMX.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,776
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Product details
Overview
LM6172IMX from Texas Instruments is a dual, high-speed, voltage-feedback operational amplifier optimized for ±5V and ±15V operation. It delivers 100MHz unity-gain bandwidth, 3000V/μs slew rate, 50mA output current per channel, and only 2.3mA supply current per channel - enabling high-fidelity video amplification and precision ADC/DAC buffering in space-constrained systems.
For engineers reviewing the LM6172IMX datasheet, LM6172IMX pinout, LM6172IMX application, or LM6172IMX equivalent, key selection criteria include its unity-gain stability, low distortion (–93dBc HD3 at 10kHz), wide common-mode input range (±13.5V at ±15V supplies), and SOIC-8 packaging suitable for high-density analog signal chains in broadcast and test equipment.
Technical Context
The LM6172IMX employs a complementary bipolar process with a symmetrical Class AB input stage and triple-buffered output stage, delivering fast settling (65ns to 0.1%) without external compensation. Its voltage-feedback architecture provides predictable gain-bandwidth tradeoffs and stable performance across ±5V to ±15V supplies.
It achieves low harmonic distortion via internal degeneration and precise biasing, with differential gain error of 0.28% and phase error of 0.6° under 75Ω-terminated NTSC conditions. The device maintains ≥40° phase margin across both supply configurations and exhibits <2MHz bandwidth matching between channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-gain bandwidth | 100MHz (D package) - supports full-swing video signals up to ~30MHz with minimal gain roll-off |
| Slew rate | 3000V/μs (±15V) - enables clean 13VPP step response at AV = +2 without slewing-induced distortion |
| Supply current per channel | 2.3mA (typical) - draws only 4.6mA total quiescent current, reducing thermal load in dual-channel designs |
| Output current per channel | 50mA (continuous, RL = 100Ω) - drives 75Ω video lines or ADC input buffers directly without external gain stages |
| Input offset voltage | 0.4mV (typical, ±15V) - ensures ≤1.2mV worst-case DC error over –40°C to +85°C, critical for precision instrumentation |
| Harmonic distortion | –93dBc HD3 (10kHz, D package) - meets broadcast-grade linearity requirements for NTSC/PAL systems |
| Common-mode input range | ±13.5V (±15V supplies) - accepts rail-to-rail input signals while maintaining >60dB CMRR |
Pinout & Package
LM6172IMX is supplied in an 8-pin SOIC (D) package measuring 4.9mm × 6mm, optimized for automated assembly and thermal performance (RθJA = 172°C/W).
| 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; requires matched trace lengths and impedance for optimal AC performance |
| 1IN+ | Channel 1 noninverting input | High-impedance input (40MΩ common-mode); used for unity-gain buffer or noninverting gain configurations |
| VCC– | Negative power supply | Accepts –5V or –15V; must be decoupled with 0.1μF ceramic capacitor near pin |
| 2IN+ | Channel 2 noninverting input | Independent second channel input; shares no internal nodes with Channel 1 for low crosstalk (<–40dB @ 1MHz) |
| 2IN– | Channel 2 inverting input | Configurable for inverting gain or differential input; matches Channel 1 electrical characteristics |
| 2OUT | Channel 2 output | Electrically isolated output stage; enables independent loading and layout routing |
| VCC+ | Positive power supply | Accepts +5V or +15V; requires local 0.1μF + 4.7μF decoupling for high-frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable | Operates reliably at AV = +1 without external compensation, simplifying PCB layout for video and buffer applications |
| Low distortion at video frequencies | 0.28% differential gain / 0.6° differential phase error at 3.58MHz - meets NTSC broadcast linearity standards |
| Wide supply range | Specified for ±5V and ±15V operation - supports portable video systems and high-voltage scanner I-to-V converters |
| Fast settling time | 65ns to 0.1% (AV = –1, ±5V swing) - enables high-throughput data acquisition and pulse amplification |
| Low input bias current | 1.2μA (typical) - minimizes voltage error in high-impedance sensor interfaces and photodiode transimpedance stages |
Applications
| Scanner I-to-V Converters | ADSL/HDSL Line Drivers |
|---|---|
Use Scenario: Converting photodiode current from high-resolution document scanners into precise voltage signals for ADC digitization. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current and wide bandwidth to preserve pulse fidelity of fast-moving scan lines. Use Value: 3000V/μs slew rate prevents pulse rounding; 100MHz bandwidth captures >50MHz spatial harmonics; ±15V operation accommodates large photocurrent swings. |
Use Scenario: Driving twisted-pair telephone lines in ADSL transceivers requiring high linearity and robust ESD tolerance. IC Role / Device Role / Timing Role: High-output-current line driver with low harmonic distortion to meet ITU-T G.992.1 spectral mask requirements. Use Value: –93dBc HD3 at 10kHz ensures compliance with upstream noise limits; ±3000V HBM ESD rating protects against field-induced failures. |
| NTSC/PAL Video Amplifiers | ADC/DAC Buffering |
Use Scenario: Amplifying composite video signals in broadcast monitors and set-top boxes with minimal color distortion. IC Role / Device Role / Timing Role: Unity-gain video buffer with 75Ω drive capability and precise differential gain/phase matching. Use Value: 0.28% differential gain and 0.6° phase error at 3.58MHz maintain chroma fidelity; 50mA output drives long coaxial cables without sag. |
Use Scenario: Isolating high-speed ADC inputs or DAC outputs from noisy digital domains in mixed-signal instrumentation. IC Role / Device Role / Timing Role: Low-noise, low-offset buffer that preserves SNR and settles within one clock cycle of 100MSPS converters. Use Value: 12nV/√Hz input voltage noise and 65ns 0.1% settling enable >10-bit effective resolution at 10MHz input frequencies. |
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 |
|---|---|---|---|
| LM6172IM | Same die, PDIP-8 package (9.81mm × 9.43mm); higher RθJA (108°C/W) and lower unity-gain bandwidth (80MHz) | Better suited for prototyping or through-hole legacy systems; not recommended for high-density surface-mount video boards | Select LM6172IMX for SOIC-8 production layouts requiring thermal efficiency and 100MHz bandwidth; choose LM6172IM only if PDIP footprint is mandatory. |
| THS3202D | Current-feedback architecture; 375MHz bandwidth but higher supply current (6.5mA/channel) and no ±5V specification | Optimized for ultra-wideband RF/IF gain blocks, not video or precision DC-coupled applications | Use THS3202D only when >200MHz closed-loop bandwidth is required; LM6172IMX remains superior for DC-accurate, low-distortion video and data converter interfacing. |
Compared with LM6172IM and THS3202D, the LM6172IMX uniquely balances 100MHz bandwidth, 2.3mA/channel efficiency, ±5V/±15V dual-supply flexibility, and broadcast-grade linearity - making it the optimal choice for cost-sensitive, high-fidelity analog signal conditioning where voltage-feedback stability and low distortion are mandatory.
Availability
LM6172IMX is available at Aetrix Electronics and suitable for scanner I-to-V conversion, ADSL line driving, NTSC/PAL video amplification, and high-speed ADC/DAC buffering requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for LM6172IMX 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 signal chain solutions.
The LM6172IMX belongs to TI's high-speed voltage-feedback op-amp product line, designed specifically for demanding analog applications including video, communications, and precision data acquisition where bandwidth, linearity, and power efficiency must coexist.
FAQ
What supply voltages does the LM6172IMX support?
The LM6172IMX is fully specified for operation on ±5V and ±15V dual supplies. At ±15V, it delivers 100MHz unity-gain bandwidth and 3000V/μs slew rate; at ±5V, it maintains 70MHz bandwidth and 750V/μs slew rate while consuming only 4.4mA total supply current. Both configurations support full-rail input common-mode ranges and are validated over –40°C to +85°C.
Is the LM6172IMX unity-gain stable?
Yes, the LM6172IMX is internally compensated for unity-gain stability. It requires no external compensation components when configured as a buffer (AV = +1) or inverting amplifier (AV = –1), simplifying design and improving phase margin consistency across temperature and supply variations. This stability is verified per TI's SNOS792E datasheet across both ±5V and ±15V operating conditions.
What is the maximum capacitive load the LM6172IMX can drive?
The LM6172IMX can safely drive up to 100pF capacitive loads in unity-gain configuration without oscillation, as confirmed by TI's application note SNOS792E Figure 7-1. For larger loads (e.g., >200pF), a series isolation resistor (typically 10–50Ω) placed between the output and capacitance restores stability while preserving signal integrity in video and cable-driving applications.
How does the LM6172IMX compare to the single-channel LM6171?
The LM6172IMX shares identical electrical specifications per channel with the LM6171 - including 100MHz bandwidth, 3000V/μs slew rate, and 2.3mA supply current - but integrates two independent amplifiers in one SOIC-8 package. This reduces board area by ~40% versus dual LM6171 implementations and ensures matched channel performance (≤2MHz bandwidth skew), critical for differential signaling and stereo video paths.
Does the LM6172IMX require input or output filtering for video applications?
For NTSC/PAL composite video, the LM6172IMX typically requires no additional filtering due to its inherent 0.28% differential gain and 0.6° phase accuracy at 3.58MHz. However, a 2pF feedback capacitor is recommended in unity-gain buffer configurations to suppress overshoot, and a 1kΩ series input resistor may be added to reduce slew-induced settling artifacts in high-speed pulse applications.
LM6172IMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LM6172IMX FAQ
1.How can I place an order for LM6172IMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM6172IMX 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 LM6172IMX reliable?
The price and inventory of LM6172IMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM6172IMX is usually 5 days.
3.What payment methods are accepted for LM6172IMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM6172IMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM6172IMX?
LM6172IMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM6172IMX 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 LM6172IMX?
For technical support, including LM6172IMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM6172IMX requirements.
6.How does Aetrix verify that LM6172IMX is sourced from the original manufacturer or authorized distributors?
All LM6172IMX 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 LM6172IMX meets industry standards.
7.What is the process for return or replacement of LM6172IMX?
All LM6172IMX units undergo pre-shipment inspection (PSI). If there is an issue with LM6172IMX, 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 LM6172IMX part is unused and in its original packaging.
Return procedure for LM6172IMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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