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Texas Instruments LM7171AIMX
- Part No.:
- LM7171AIMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM7171AIMX.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,991
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Product details
Overview
LM7171AIMX 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, ±15 V or ±5 V dual-supply operation, and 100 mA output current-enabling robust signal integrity in professional video cameras and CATV signal processing.
For engineers reviewing the LM7171AIMX datasheet, LM7171AIMX pinout, LM7171AIMX application, or LM7171AIMX equivalent, this page provides verified technical context, real-world design meaning for key specs, validated SOIC-8 pin functions, application-specific use-value analysis, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LM7171AIMX uses a symmetrical Class AB input stage with triple-buffered output architecture to achieve CFA-like slew performance while retaining full voltage-feedback topology compatibility-including stable operation at noise gain ≥ +2 and support for integrators, I-to-V converters, and photodiode amplifiers. Its internal degeneration resistor (RE) sets slew rate proportionally to input differential voltage.
It features low distortion (–75 dBc HD2/–88 dBc HD3 at 5 MHz, RL = 100 Ω), high open-loop gain (85 dB), and wide common-mode input range (±13.35 V on ±15 V supplies), making it suitable for precision high-frequency analog signal conditioning where dynamic range and linearity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 4100 V/μs at AV = +2, ±15 V - enables clean reproduction of fast-edged video pulses without slew-induced distortion |
| Unity-Gain Bandwidth | 200 MHz (LM7171A grade) - supports full-bandwidth amplification up to ~100 MHz closed-loop with gain ≥ +2 |
| Output Current | 100 mA sourcing/sinking into 100 Ω - drives heavy capacitive loads (e.g., coaxial cables, transformers) without clipping |
| Supply Current | 6.5 mA typical at ±15 V - balances ultra-high speed with moderate power consumption for thermal management |
| Input Offset Voltage | 1 mV max (LM7171A, TA = –40°C to +85°C) - ensures DC accuracy in precision gain stages and level-shifting circuits |
| Harmonic Distortion | –75 dBc HD2 / –88 dBc HD3 at 5 MHz, RL = 100 Ω - preserves signal fidelity in ADC/DAC interface and broadcast systems |
| Stable Gain Range | AV ≥ +2 or AV ≤ –1 - eliminates need for external compensation in standard non-inverting/inverting configurations |
Pinout & Package
LM7171AIMX is packaged in an 8-pin SOIC (D package), 4.90 mm × 6.00 mm body size with standard JEDEC MS-012AC footprint. Pin 1 is NC; pins 2 (+IN) and 3 (–IN) are high-impedance inputs; pins 4 (V–) and 7 (V+) are supply terminals; pin 6 is the output; pins 1, 5, and 8 are no-connect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection (NC) | Must remain unconnected; no internal bond or function - floating pins reduce parasitic coupling |
| 2 | +IN (Noninverting Input) | High-impedance node (320 MΩ common-mode); used for unity-gain buffer or noninverting amplifier configurations |
| 3 | –IN (Inverting Input) | High-impedance node (320 MΩ common-mode); accepts feedback network for inverting gain stages |
| 4 | V– | Negative supply rail connection; must be decoupled locally to minimize ground bounce in high-slew operation |
| 6 | OUTPUT | Low-impedance buffered output capable of ±13.3 V swing into 1 kΩ and ±11.8 V into 100 Ω at ±15 V supplies |
| 7 | V+ | Positive supply rail connection; requires local 0.1 μF ceramic + 10 μF tantalum decoupling per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback topology with CFA-level slew | Enables use in traditional op-amp circuits (e.g., integrators, transimpedance amps) without stability compromises |
| Specified for ±15 V and ±5 V operation | Supports both high-dynamic-range industrial video and low-voltage portable applications without redesign |
| Differential gain/phase error: 0.01% / 0.02° | Meets broadcast-grade video linearity requirements (e.g., SMPTE 259M) without post-correction circuitry |
| Low THD and SFDR | –75 dBc HD2 at 5 MHz enables clean signal chain integration in high-resolution ADC/DAC interfaces |
| Thermal shutdown protection | Integrated junction temperature monitoring prevents damage during sustained high-power output operation |
Applications
| Professional Video Camera Signal Chain | HDSL/ADSL Line Driver |
|---|---|
Use Scenario: Amplifying RGB/YUV baseband video signals before transmission over long coaxial runs. IC Role / Device Role / Timing Role: High-fidelity buffer and driver stage maintaining signal integrity across 0–100 MHz bandwidth. Use Value: 0.01% differential gain error and 4100 V/μs slew prevent color bleeding and edge ringing in HD/4K video paths. |
Use Scenario: Driving twisted-pair telephone lines in high-bitrate DSL modems with >10 MHz upstream/downstream bandwidth. IC Role / Device Role / Timing Role: Final-stage line driver delivering high-current, low-distortion analog output to hybrid couplers. Use Value: 100 mA output current and –75 dBc HD2 at 5 MHz ensure compliance with ANSI T1.413 spectral mask and SNR targets. |
| CATV Signal Processing | Laser Diode Driver (Pulsed) |
Use Scenario: Amplifying downstream RF carriers (50–1000 MHz) in headend equipment prior to optical modulation. IC Role / Device Role / Timing Role: Wideband gain block operating at AV = +2 with minimal group delay variation. Use Value: 220 MHz –3 dB bandwidth at AV = +2 and low PSRR (<10 dB degradation up to 100 MHz) suppress supply noise injection into RF path. |
Use Scenario: Generating fast-rising current pulses (≤10 ns rise time) to drive pulsed laser diodes in fiber-optic test equipment. IC Role / Device Role / Timing Role: Precision current source with fast transient response and low overshoot. Use Value: 4100 V/μs slew and 16 ns 0.1% settling time (AV = –1) enable sub-20 ns optical pulse edges with <1% timing jitter. |
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 |
|---|---|---|---|
| LM7171AMX | Same SOIC-8 package and pinout; LM7171A grade with identical electrical specs (e.g., 200 MHz unity-gain BW, 4100 V/μs SR). | No functional difference; AMX is alternate orderable part number for same LM7171A device. | Select LM7171AMX only if LM7171AIMX is unavailable; identical performance and drop-in replacement. |
| THS3091D | Higher slew rate (6000 V/μs), lower supply current (5.3 mA), but narrower small-signal bandwidth (210 MHz) and no ±5 V specification. | Better for ultra-fast pulse applications requiring <10 ns rise time; less suitable for dual-supply portable designs. | Choose THS3091D when maximum slew dominates over supply flexibility; verify stability at target gain with layout-dependent compensation. |
Compared with LM7171AIMX, LM7171AMX offers identical performance as a direct alternate part number, while THS3091D trades ±5 V operation and broader gain stability for higher slew rate-making it optimal for single-supply, ultra-fast pulse systems but less versatile in mixed-voltage video infrastructure.
Availability
LM7171AIMX is available at Aetrix Electronics and suitable for professional video camera signal chains, HDSL/ADSL line drivers, and CATV signal processing requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for LM7171AIMX 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 LM7171 series was designed specifically for high-speed video, communications, and instrumentation applications demanding both voltage-feedback usability and current-feedback speed-bridging a longstanding gap in the op-amp portfolio.
FAQ
What supply voltages does the LM7171AIMX support?
The LM7171AIMX is fully 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 950–1200 V/μs and bandwidth to 125–140 MHz, enabling portable or low-power implementations while retaining functionality. LM7171AIMX maintains stability and specified distortion performance across both ranges.
Is the LM7171AIMX pin-compatible with other high-speed op-amps like the THS3091?
No, the LM7171AIMX is not pin-compatible with the THS3091. LM7171AIMX uses an 8-pin SOIC package with NC pins at positions 1, 5, and 8, while THS3091 uses an 8-pin SOIC with active pins at all positions (including enable and compensation terminals). Their pin functions differ fundamentally: LM7171AIMX has no enable or comp pins, whereas THS3091 requires external compensation and features an active-low enable. Direct PCB replacement is not possible without layout revision.
Can the LM7171AIMX drive a 75 Ω coaxial cable directly?
Yes, the LM7171AIMX can drive a 75 Ω coaxial cable directly when configured as a gain-of-two inverting or noninverting amplifier. With 100 mA output current and ±11.8 V swing into 100 Ω at ±15 V supplies, it comfortably sources/sinks the required current for 1 VPP into 75 Ω (≈13.3 mA peak). For best signal integrity, use series termination at the output (e.g., 37.5 Ω) and maintain controlled-impedance routing per TI's layout recommendations in the LM7171 datasheet.
Does the LM7171AIMX require external compensation?
No, the LM7171AIMX is internally compensated and stable for noise gains ≥ +2 or ≤ –1 without external components. Its design eliminates the need for external compensation networks required by many high-speed op-amps. However, for gains below +2 (e.g., unity-gain buffer), external feedback capacitance or resistive isolation (e.g., 1 kΩ series resistor at input) may be needed to suppress peaking above 100 MHz, as noted in Section 6.1.2.1 of the datasheet.
What is the thermal performance of the LM7171AIMX in SOIC-8 package?
The LM7171AIMX 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 supplies (30 V total), quiescent power dissipation is ~195 mW, resulting in ~24 °C junction-to-ambient rise under still-air conditions. With proper PCB copper pour and two-layer thermal vias, actual rise is typically <15 °C. The device includes thermal shutdown that activates at TJ > 150 °C to prevent permanent damage during overload conditions.
LM7171AIMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- VIP™ III
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LM7171AIMX FAQ
1.How can I place an order for LM7171AIMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM7171AIMX 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 LM7171AIMX reliable?
The price and inventory of LM7171AIMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM7171AIMX is usually 5 days.
3.What payment methods are accepted for LM7171AIMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM7171AIMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM7171AIMX?
LM7171AIMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM7171AIMX 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 LM7171AIMX?
For technical support, including LM7171AIMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM7171AIMX requirements.
6.How does Aetrix verify that LM7171AIMX is sourced from the original manufacturer or authorized distributors?
All LM7171AIMX 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 LM7171AIMX meets industry standards.
7.What is the process for return or replacement of LM7171AIMX?
All LM7171AIMX units undergo pre-shipment inspection (PSI). If there is an issue with LM7171AIMX, 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 LM7171AIMX part is unused and in its original packaging.
Return procedure for LM7171AIMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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