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Texas Instruments LM7171AIM
- Part No.:
- LM7171AIM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM7171AIM.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,755
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Product details
Overview
LM7171AIM from Texas Instruments is a very high-speed, high-output-current voltage-feedback amplifier optimized for video distribution, HDSL/ADSL line drivers, and pulse amplification. It delivers 4100 V/μs slew rate, 200 MHz unity-gain bandwidth, 100 mA output current, and operates stably at gains ≥ +2 or −1 on ±15 V supplies - enabling large-signal swing in professional video cameras and laser diode driver circuits.
For engineers reviewing the LM7171AIM datasheet, LM7171AIM pinout, LM7171AIM application, or LM7171AIM equivalent, key selection criteria include slew-rate-limited pulse fidelity, ±15 V/±5 V dual-supply flexibility, low THD (−75 dBc at 5 MHz), differential gain/phase accuracy (0.01%/0.02°), and SOIC-8 thermal performance (RθJA = 122.5°C/W).
Technical Context
The LM7171AIM uses a symmetrical Class AB input stage with internal current-buffering architecture that emulates current-feedback slew behavior while retaining full voltage-feedback configurability - supporting integrators, I-to-V converters, and photodiode amplifiers where CFAs fail. Its triple-buffered output stage isolates gain circuitry from reactive loads.
Stability is guaranteed for noise gains ≥ +2 (AV = +2 or −1) without external compensation. Slew rate scales linearly with input voltage amplitude and supply rail - reaching 4100 V/μs at ±15 V and 1200 V/μs at ±5 V - making it suitable for both high-dynamic-range broadcast systems and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 4100 V/μs at ±15 V, AV = +2 - enables distortion-free 13 VPP pulses within 16 ns settling (0.1%) |
| Unity-Gain Bandwidth | 200 MHz (LM7171A grade) - supports >100 MHz closed-loop video signal paths with minimal phase lag |
| Output Current | 100 mA sourcing/sinking into 100 Ω load - drives coaxial cables, transformers, and laser diodes without external buffers |
| Supply Current | 6.5 mA typical at ±15 V - achieves high speed with low power overhead vs. competing RF op-amps |
| Differential Gain/Phase | 0.01% / 0.02° - meets SMPTE 259M broadcast video linearity requirements for HD/SD-SDI |
| Input Offset Voltage | 1 mV max (LM7171A, TA = −40°C to +85°C) - minimizes DC error in precision pulse amplification stages |
| THD + Noise | −75 dBc at 5 MHz, RL = 100 Ω - preserves signal integrity in ADC/DAC interface and CATV upstream paths |
Pinout & Package
LM7171AIM is housed in an 8-pin SOIC (D package), 4.90 mm × 6.00 mm body size with standard JEDEC MS-012AC footprint. Thermal resistance RθJA = 122.5°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection (NC) | Internally unconnected; must remain floating - no routing or grounding required |
| 2 (–IN) | Inverting Input | High-impedance node for feedback network connection; accepts standard resistive divider configurations |
| 3 (+IN) | Noninverting Input | High-impedance node for signal source; supports single-ended or differential input topologies |
| 4 (V–) | Negative Supply Rail | Connects to −15 V or −5 V; requires local 0.1 μF ceramic bypass capacitor to ground |
| 6 (OUTPUT) | Amplified Output | Capable of ±13.3 V swing into 1 kΩ or ±11.8 V into 100 Ω; drives 50 Ω/75 Ω transmission lines directly |
| 7 (V+) | Positive Supply Rail | Connects to +15 V or +5 V; requires local 0.1 μF ceramic bypass capacitor to ground |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback topology with CFA-like slew | Enables use in integrator, transimpedance, and active filter circuits - unlike true current-feedback amplifiers |
| Stable at noise gain ≥ +2 | Eliminates need for external compensation in gain-of-two video buffers and line drivers |
| ±15 V and ±5 V operation | Supports both high-dynamic-range broadcast equipment and battery-powered test instruments |
| Low harmonic distortion | HD2 = −75 dBc and HD3 = −88 dBc at 5 MHz ensures clean signal reconstruction in DAC output stages |
| High output drive capability | 100 mA continuous output sustains 75 Ω video loads and laser diode bias without external MOSFET buffers |
Applications
| HDSL/ADSL Line Driver | Professional Video Camera Signal Chain |
|---|---|
Use Scenario: Amplifying and driving DSL signals over twisted-pair copper lines with precise amplitude and timing control. IC Role / Device Role / Timing Role: Final-stage line driver delivering 13 VPP differential output with <16 ns 0.1% settling time. Use Value: Enables compliance with ANSI T1.413 and ITU-T G.992.1 standards via low group delay variation and 0.01% differential gain accuracy. |
Use Scenario: Buffering and distributing RGB/YUV analog video signals from image sensor to encoder or monitor outputs. IC Role / Device Role / Timing Role: High-fidelity video distribution amplifier with 220 MHz −3 dB bandwidth at AV = +2. Use Value: Preserves edge integrity in 1080p60 video streams; meets SMPTE 259M differential gain/phase specs without post-correction. |
| Laser Diode Driver (Pulsed) | HDTV Broadcast Amplifier |
Use Scenario: Driving pulsed laser diodes in fiber-optic test equipment requiring fast turn-on/turn-off and precise current control. IC Role / Device Role / Timing Role: High-current, high-slew-rate current source configured via external sense resistor. Use Value: Delivers 100 mA into capacitive laser loads with sub-20 ns rise/fall times and minimal overshoot when series-input damping is applied. |
Use Scenario: Amplifying baseband HDTV signals (e.g., 1080i, 720p) for broadcast studio routing and distribution. IC Role / Device Role / Timing Role: Unity-gain buffer with 200 MHz bandwidth and 13.3 V output swing into 75 Ω. Use Value: Maintains signal fidelity across multi-hop analog video chains; supports long-cable runs with minimal high-frequency roll-off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed voltage-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7171BIN | Same SOIC-8 package and pinout; wider input offset voltage range (3 mV max vs. 1 mV for AIM), lower unity-gain bandwidth (160 MHz vs. 200 MHz) | Acceptable for non-broadcast video and general-purpose pulse amplification where tighter DC specs are not required | Select LM7171BIN only if cost sensitivity outweighs need for broadcast-grade differential gain/phase and highest slew rate |
| THS3201CD | Higher slew rate (6000 V/μs), but current-feedback architecture limits use in integrators/I-to-V circuits; requires careful layout for stability | Better suited for pure RF gain blocks and wideband ADC drivers where feedback capacitor usage is avoided | Choose THS3201CD only when maximum slew rate is critical and circuit topology permits CFA constraints |
Compared with LM7171BIN and THS3201CD, the LM7171AIM uniquely combines voltage-feedback versatility, 200 MHz bandwidth, 4100 V/μs slew, and broadcast-grade linearity - making it the preferred choice for video distribution, DSL line drivers, and mixed-signal test equipment where configurability and fidelity are jointly essential.
Availability
LM7171AIM is available at Aetrix Electronics and suitable for HDSL/ADSL infrastructure, professional broadcast video systems, and high-speed test instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM7171AIM 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 decades of high-performance amplifier design heritage.
The LM7171AIM belongs to TI's high-speed operational amplifier product line, engineered specifically for demanding video, communications, and instrumentation applications where speed, linearity, and configurability must coexist.
FAQ
What supply voltages does the LM7171AIM support?
The LM7171AIM is specified for operation on ±15 V and ±5 V dual supplies. At ±15 V, it delivers full performance: 4100 V/μs slew rate, 200 MHz unity-gain bandwidth, and ±13.3 V output swing into 1 kΩ. At ±5 V, slew rate reduces to 1200 V/μs and bandwidth to 125 MHz - enabling portable or low-voltage system integration while retaining functional compatibility. Both configurations maintain stability at noise gains ≥ +2.
Is the LM7171AIM pin-compatible with other members of the LM7171 family?
Yes, the LM7171AIM shares identical SOIC-8 pinout and footprint with LM7171BIN, LM7171AID, and LM7171BID. All variants use pins 1, 5, and 8 as NC; pins 2 and 3 as inputs; pin 4 as V–; pin 6 as OUTPUT; and pin 7 as V+. No PCB redesign is needed when upgrading from BIN to AIM grade, though system-level validation of offset voltage, bandwidth, and slew performance is recommended.
Can the LM7171AIM drive 75 Ω video loads directly?
Yes, the LM7171AIM can drive 75 Ω video loads directly. With ±15 V supplies, it delivers ±11.8 V into 100 Ω and maintains >200 MHz small-signal bandwidth into 75 Ω with proper termination. For optimal pulse fidelity, use series output resistors (e.g., 10–22 Ω) to dampen reflections and reduce overshoot - especially in HDTV and SDI applications where SMPTE 259M compliance is required.
How does the LM7171AIM differ from current-feedback amplifiers like the THS3091?
The LM7171AIM is a voltage-feedback amplifier with high-impedance inputs on both +IN and –IN terminals, allowing use in integrators, transimpedance amplifiers, and active filters - unlike current-feedback amplifiers (CFAs) such as the THS3091, which have low-impedance inverting inputs incompatible with feedback capacitors. While the LM7171AIM matches CFAs in slew rate, its VFA architecture provides broader circuit flexibility and superior DC precision.
What thermal considerations apply to the LM7171AIM in SOIC-8 package?
The LM7171AIM in SOIC-8 (D package) has a junction-to-ambient thermal resistance (RθJA) of 122.5°C/W. At 6.5 mA supply current and ±15 V rails, quiescent power dissipation is ~195 mW. Under worst-case 100 mA output into 100 Ω, power dissipation rises to ~1.2 W - requiring board-level copper pour or limited duty cycle to keep junction temperature below 150°C. Derating above +70°C ambient is advised per TI's thermal guidelines.
LM7171AIM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP™ III
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 4100V/µs
- Gain Bandwidth Product:
- 200 MHz
- -3db Bandwidth:
- 220 MHz
- Current - Input Bias:
- 2.7 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 6.5mA
- Current - Output / Channel:
- 118 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
LM7171AIM FAQ
1.How can I place an order for LM7171AIM through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7171AIM 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 LM7171AIM reliable?
The price and inventory of LM7171AIM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7171AIM is usually 5 days.
3.What payment methods are accepted for LM7171AIM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7171AIM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM7171AIM?
LM7171AIM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7171AIM 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 LM7171AIM?
For technical support, including LM7171AIM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7171AIM requirements.
6.How does Aetrix verify that LM7171AIM is sourced from the original manufacturer or authorized distributors?
All LM7171AIM 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 LM7171AIM meets industry standards.
7.What is the process for return or replacement of LM7171AIM?
All LM7171AIM units undergo pre-shipment inspection (PSI). If there is an issue with LM7171AIM, 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 LM7171AIM part is unused and in its original packaging.
Return procedure for LM7171AIM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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