Texas Instruments LM7171BIMX/NOPB

Overview

LM7171BIMX/NOPB from Texas Instruments is a high-speed 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, 100 mA output current, and operates stably at gains ≥ +2 or −1 on ±15 V supplies - enabling large-signal swing in broadcast video and laser diode driver applications.

For engineers reviewing the LM7171BIMX/NOPB datasheet, LM7171BIMX/NOPB pinout, LM7171BIMX/NOPB application, or LM7171BIMX/NOPB equivalent, key selection criteria include slew-rate-limited large-signal fidelity, ±5 V / ±15 V dual-supply flexibility, low THD (−75 dBc at 5 MHz), differential gain/phase accuracy (0.01%/0.02°), and SOIC-8 thermal performance (R_θJA = 172 °C/W).

Technical Context

The LM7171BIMX/NOPB uses a symmetrical Class AB input stage with internal degeneration resistor RE to achieve CFA-like slew behavior while retaining standard VFA topology compatibility. Its triple-buffered output stage isolates gain circuitry from capacitive loads, supporting stable operation with up to 1000 pF without external compensation.

It maintains phase margin ≥50° at AV = +2 and provides 220 MHz −3 dB bandwidth under ±15 V supply. Input-referred voltage noise is 14 nV/√Hz at 10 kHz, and CMRR remains >70 dB across −40°C to +85°C ambient range - critical for precision video signal conditioning.

Key Specifications

Pinout & Package

LM7171BIMX/NOPB is packaged in an 8-pin SOIC (D package), 4.90 mm × 6.00 mm body size with standard JEDEC MS-012AC footprint. Thermal resistance R_θJA = 172 °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 amplifier applications.

Compared with LM7171AIMX/NOPB and THS3091D, LM7171BIMX/NOPB uniquely balances ±5 V/±15 V dual-supply support, 200 MHz bandwidth, and 100 mA drive in SOIC-8 - making it optimal for cost-sensitive, multi-voltage video and telecom infrastructure where moderate precision suffices.

Availability

LM7171BIMX/NOPB is available at Aetrix Electronics and suitable for HDSL line drivers, professional video camera signal chains, and fiber-optic laser diode drivers requiring stable component supply, long-term manufacturability, and TI's industry-standard SOIC-8 footprint compatibility.

Supply support for LM7171BIMX/NOPB 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 LM7171 series was designed specifically for high-fidelity, high-speed analog signal paths - targeting video distribution, DSL line drivers, and precision pulse amplification where VFA topology compatibility and CFA-level speed are jointly required.

FAQ

What supply voltages does the LM7171BIMX/NOPB support?

The LM7171BIMX/NOPB is fully specified for operation on ±15 V and ±5 V supplies. At ±15 V, it achieves 4100 V/μs slew rate and 200 MHz unity-gain bandwidth; at ±5 V, it delivers 950 V/μs and 125 MHz bandwidth. Both configurations maintain 100 mA output drive capability into 100 Ω loads, enabling flexible deployment across mains-powered broadcast gear and battery-operated field equipment.

Is the LM7171BIMX/NOPB stable in unity-gain configuration?

No - the LM7171BIMX/NOPB is not unity-gain stable. It is specified for stable operation at noise gains ≥ +2 (noninverting) or ≥ −1 (inverting). Attempting unity-gain (AV = +1) configuration will result in oscillation due to insufficient phase margin. For unity-gain applications, consider TI's OPA695 or ADI's ADA4817, which are explicitly unity-gain stable.

How does the LM7171BIMX/NOPB differ from the LM7171AIMX/NOPB?

The LM7171BIMX/NOPB and LM7171AIMX/NOPB share identical pinout, package, and basic specifications but differ in precision grade. The 'A' version has tighter limits: 1 mV max input offset voltage vs. 3 mV for 'B', 16 ns vs. 42 ns 0.1% settling time, and −123 dBc vs. −75 dBc second-harmonic distortion at 5 MHz. Both operate identically at ±5 V and ±15 V, but the 'A' variant targets metrology and test instrumentation.

Can the LM7171BIMX/NOPB drive 75 Ω video loads directly?

Yes - the LM7171BIMX/NOPB can drive 75 Ω video loads directly. With 100 mA output current and ±13.3 V swing into 1 kΩ, it delivers ±7.5 V into 75 Ω (100 mA × 75 Ω = 7.5 V) while maintaining <0.1 dB gain flatness to 100 MHz. For sustained 1 V_PP into 75 Ω over long cable runs, add a series 75 Ω termination at the output to prevent reflections.

What layout practices improve stability and bandwidth for the LM7171BIMX/NOPB?

To maximize stability and bandwidth, place 0.1 μF ceramic decoupling capacitors ≤5 mm from pins 4 (V–) and 7 (V+), use ground plane beneath the SOIC-8 body, minimize trace length to pins 2 (–IN) and 3 (+IN), and avoid vias in feedback paths. For >100 MHz operation, implement guard rings around high-impedance inputs and route output traces over solid ground to control characteristic impedance.