Texas Instruments LM7171BIM

Overview

LM7171BIM from Texas Instruments is a very high-speed, high-output-current voltage-feedback amplifier optimized for video distribution, pulse amplification, and HDSL/ADSL line drivers. It delivers 4100 V/μs slew rate, 200 MHz unity-gain bandwidth, and ±13.3 V output swing into 1 kΩ at ±15 V supplies - enabling distortion-free signal conditioning in professional video and broadband communications systems.

For engineers reviewing the LM7171BIM datasheet, LM7171BIM pinout, LM7171BIM application, or LM7171BIM equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in HDTV amplifiers and laser diode driving, and validated alternative parts for design flexibility under ±5 V or ±15 V operation.

Technical Context

The LM7171BIM uses a symmetrical Class AB input stage with triple-buffered output architecture to achieve CFA-like slew performance while retaining full voltage-feedback configurability - supporting standard op-amp topologies including integrators and I-to-V converters. Its internal degeneration resistor (RE) sets slew rate proportionally to input differential voltage.

Stable for noise gains ≥ +2 (or −1), it maintains 50° phase margin and exhibits low harmonic distortion (−75 dBc HD2/HD3 at 5 MHz, RL = 100 Ω) across ±5 V and ±15 V supply ranges, with specified operation from −40°C to +85°C ambient temperature.

Key Specifications

Pinout & Package

LM7171BIM is housed in an 8-pin SOIC (D package), 4.90 mm × 6.00 mm body size with standard JEDEC MS-012AC footprint. Pin 1 and Pins 5 & 8 are no-connect (NC); functional pins follow conventional op-amp layout for drop-in compatibility in existing designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM7171AIM and THS3201D, LM7171BIM uniquely balances wideband performance (200 MHz), dual-supply operation (±5 V/±15 V), and video-grade linearity (0.01%/0.02°) - making it the optimal choice for HDTV, DSL, and fiber-optic transmitter designs requiring both speed and signal integrity.

Availability

LM7171BIM is available at Aetrix Electronics and suitable for HDTV broadcast amplifiers, ADSL line drivers, and professional video camera signal chains requiring stable component supply, long-term manufacturability, and guaranteed traceability.

Supply support for LM7171BIM 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 50 years of innovation in high-performance amplifiers and data converters.

The LM7171 product line was designed specifically for demanding wideband analog signal conditioning - targeting video distribution, telecommunications infrastructure, and high-fidelity test equipment where speed, output drive, and low distortion are non-negotiable.

FAQ

What supply voltages does the LM7171BIM support?

The LM7171BIM is fully specified for operation across ±5 V and ±15 V dual supplies, with recommended operating conditions spanning 5.5 V to 36 V total supply range. At ±15 V, it delivers its full 4100 V/μs slew rate and 200 MHz bandwidth; at ±5 V, it maintains 950 V/μs slew rate and 125 MHz unity-gain bandwidth - enabling flexible deployment in both high-dynamic-range and low-power systems. The LM7171BIM datasheet confirms performance across −40°C to +85°C ambient temperature in both configurations.

Is the LM7171BIM pin-compatible with other LM7171 variants?

Yes, the LM7171BIM shares identical SOIC-8 (D package) pinout and footprint with LM7171AIM and LM7171M, including NC pins at positions 1, 5, and 8. All variants use the same V+, V−, +IN, –IN, and OUTPUT assignments. However, electrical differences - such as input offset voltage (3 mV max for LM7171BIM vs. 1 mV max for LM7171AIM) and phase margin - require verification in gain-stable configurations. No PCB changes are needed for physical replacement, but system-level validation is recommended.

Can the LM7171BIM drive 75 Ω video loads directly?

Yes, the LM7171BIM delivers ±100 mA linear output current, enabling direct driving of standard 75 Ω video loads at full amplitude. When configured as a gain-of-1 buffer with proper termination, it sustains ±13.3 V output swing into 1 kΩ and ±10.5 V into 100 Ω at ±15 V supplies - exceeding SMPTE/ITU-R BT.601 requirements. Its 0.01% differential gain and 0.02° phase error ensure broadcast-grade color fidelity without external current-boosting circuitry.

What is the minimum stable gain for the LM7171BIM?

The LM7171BIM is stable for closed-loop noise gains of +2 or greater (i.e., noninverting gain ≥ +2 or inverting gain ≤ −1). This is confirmed in the TI LM7171 datasheet Section 3 and Figure 5-12 (open-loop frequency response), which shows 50° phase margin at AV = +2. Attempting unity-gain (AV = +1) configuration risks instability and peaking; for AV = +1 applications, external compensation or a different amplifier (e.g., THS3091) is required.

Does the LM7171BIM support single-supply operation?

The LM7171BIM is not characterized or guaranteed for true single-supply operation (e.g., 0 V and +Vs). Its input common-mode voltage range extends to ±13.35 V at ±15 V supplies and ±3.2 V at ±5 V supplies - requiring both positive and negative rails for full rail-to-rail input swing. While it can operate with asymmetric supplies (e.g., +15 V and 0 V), performance degrades significantly: output swing becomes asymmetrical, CMRR drops, and distortion increases. For single-supply designs, TI recommends the OPA695 or THS3491 instead.