Texas Instruments LM6171AIM

Overview

LM6171AIM from Texas Instruments is a high-speed, unity-gain-stable voltage-feedback amplifier optimized for video and precision analog signal processing. It delivers 3600 V/μs slew rate, 76 MHz unity-gain bandwidth (LM6171A grade), 110 dB CMRR, 2.5 mA supply current, and operates from ±5 V to ±15 V supplies - enabling high-fidelity NTSC/PAL line driving and ADC/DAC buffering in broadcast systems.

For engineers reviewing the LM6171AIM datasheet, LM6171AIM pinout, LM6171AIM application, or LM6171AIM equivalent, key selection criteria include its wide −3-dB bandwidth at AV = +2 (75 MHz), low THD/SFDR performance, rail-to-rail output swing capability under 100-Ω load, and SOIC-8 package compatibility with legacy video amplifier layouts.

Technical Context

The LM6171AIM implements a classic voltage-feedback op-amp topology with fully differential input stage and high-current Class-AB output stage. Its internal compensation ensures unity-gain stability without external components while maintaining phase margin ≥57° across ±5 V to ±15 V operation.

It supports dual-supply operation only (no single-supply mode), features input common-mode range extending to within 1.5 V of rails, and exhibits low 12 nV/√Hz input voltage noise at 10 kHz - critical for preserving SNR in HDTV amplifiers and pulse amplification stages.

Key Specifications

Pinout & Package

LM6171AIM is supplied in an 8-pin SOIC (D package), 4.9 mm × 6 mm body size, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance R_θJA = 122.5 °C/W enables operation up to +85°C ambient without forced airflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed voltage-feedback amplifier applications.

Compared with LM6172IM and OPA695ID, the LM6171AIM provides the optimal balance of speed (76 MHz), power efficiency (2.5 mA), and ease of use (voltage-feedback, unity-gain stable) for broadcast video, HDTV, and precision analog front-ends where layout simplicity and supply flexibility are prioritized over extreme bandwidth.

Availability

LM6171AIM is available at Aetrix Electronics and suitable for video line drivers, ADC/DAC buffering, HDTV amplifiers, and pulse amplification requiring stable component supply across industrial temperature ranges (−40°C to +85°C) and long-lifecycle production programs.

Supply support for LM6171AIM 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The LM6171AIM belongs to TI's high-speed precision op-amp product line, engineered specifically for demanding video, instrumentation, and data acquisition applications where bandwidth, linearity, and DC accuracy must coexist.

FAQ

What supply voltages does the LM6171AIM support?

The LM6171AIM is specified for dual-supply operation from ±5 V to ±15 V (total supply range: 10 V to 30 V). It is not rated for single-supply use. At ±5 V, it delivers 750 V/μs slew rate and 70 MHz unity-gain bandwidth; at ±15 V, it achieves 3600 V/μs and 76 MHz. The device maintains full functionality across the −40°C to +85°C industrial temperature range under all supported supply conditions. LM6171AIM datasheet Section 5.3 confirms these operating limits.

Is the LM6171AIM unity-gain stable?

Yes, the LM6171AIM is internally compensated for unity-gain stability and requires no external compensation components. It maintains ≥57° phase margin at AV = +1 across ±5 V to ±15 V supplies and remains stable driving capacitive loads up to 1000 pF. This is verified in LM6171AIM datasheet Figures 5-40 through 5-43 and Section 6.3, which explicitly state "unity-gain stable" as a core feature. No additional feedback capacitance or zero-adding networks are needed for AV = +1 configurations.

What is the maximum output current capability of the LM6171AIM?

The LM6171AIM delivers continuous output current of ≥116 mA sourcing and ≥105 mA sinking into a 100-Ω load at ±15 V supply (Section 5.5). Short-circuit current reaches 135 mA (both sourcing and sinking). Under ±5 V operation, continuous output current is ≥32 mA sourcing and ≥30 mA sinking. These values are measured with the device in linear region - thermal derating applies above +85°C ambient, as shown in Figure 5-52. LM6171AIM's robust output stage supports direct 75-Ω video cable driving without external buffers.

Does the LM6171AIM meet NTSC/PAL video specifications?

Yes, the LM6171AIM meets broadcast video specifications: differential gain error ≤0.03% and differential phase error ≤0.5° at AV = +2, 3.58 MHz, with 75-Ω terminations (Section 5.5). Its 75 MHz −3-dB bandwidth at AV = +2 and low harmonic distortion (<–70 dBc) ensure compliance with NTSC, PAL, and SECAM timing and color fidelity requirements. TI's application note SBAA212 further validates LM6171AIM in composite video driver circuits meeting EIA-770.1 standards.

What package options are available for the LM6171AIM?

The LM6171AIM is offered exclusively in the 8-pin SOIC (D package), 4.9 mm × 6 mm body size, with JEDEC MO-012AC outline and gull-wing leads. This is distinct from the LM6171P (PDIP-8) variant. The "AIM" suffix denotes the SOIC-8 package with industrial temperature range (−40°C to +85°C) and enhanced manufacturing traceability. Package drawings and thermal data (R_θJA = 122.5 °C/W) are provided in Section 10 of the LM6171AIM datasheet.