Texas Instruments TLV171QDBVRQ1

Overview

TLV171QDBVRQ1 from Texas Instruments is a 36-V, single-supply, low-noise automotive-grade operational amplifier in SOT-23-5 package. It delivers 3 MHz gain bandwidth, ±1 µV/°C offset drift, and rail-to-rail output while operating from ±2.25 V to ±18 V or 4.5 V to 36 V. It serves as a precision signal-conditioning amplifier in ADAS sensor interfaces and body electronics current sensing.

For engineers reviewing the TLV171QDBVRQ1 datasheet, TLV171QDBVRQ1 pinout, TLV171QDBVRQ1 application, or TLV171QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), 16 nV/√Hz input voltage noise at 1 kHz, 120 dB CMRR, 525 µA quiescent current per amplifier, and phase-reversal protection for robust operation in automotive transients.

Technical Context

The TLV171QDBVRQ1 uses a proprietary input stage that enables operation 100 mV below V– and within 2 V of V+, with full rail-to-rail input capability beyond V+ (at reduced performance). Its internal phase-reversal protection prevents output inversion when common-mode voltage exceeds linear range-critical for noninverting configurations in noisy automotive environments.

It achieves stability with capacitive loads up to 300 pF when isolated by a series output resistor (e.g., 50 Ω), and maintains 94–120 dB PSRR across 4.5 V–36 V supply range. Open-loop gain remains ≥110 dB over temperature with 1.5 V/µs slew rate and 6 µs 0.1% settling time for 10-V steps.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body size, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with LM7321QDRQ1 and TSV911QDBVRQ1, TLV171QDBVRQ1 uniquely balances wide 4.5–36 V operation, automotive temperature grade, phase-reversal immunity, and sub-600 µA quiescent current - making it the only choice for cost-sensitive, high-reliability analog front-ends across 12 V and 24 V vehicle platforms.

Availability

TLV171QDBVRQ1 is available at Aetrix Electronics and suitable for automotive ADAS sensor interfaces, body electronics current monitoring, and powertrain thermal sensing requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLV171QDBVRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.

The TLVx171-Q1 product line was designed specifically for cost-sensitive automotive systems requiring high precision, wide supply range, and AEC-Q100 compliance - targeting body electronics, lighting, and ADAS subsystems.

FAQ

What is the maximum capacitive load the TLV171QDBVRQ1 can drive without oscillation?

The TLV171QDBVRQ1 remains stable with capacitive loads up to 300 pF when properly decoupled and used with an isolation resistor (e.g., 50 Ω) in series with the output. Without isolation, stability degrades above ~100 pF; Figure 15 and Figure 16 in the SBOS858 datasheet confirm overshoot behavior vs. load capacitance. TLV171QDBVRQ1's internal compensation is optimized for unity-gain stability under these conditions.

Does the TLV171QDBVRQ1 support true rail-to-rail input operation?

TLV171QDBVRQ1 supports input voltages from V– – 0.1 V to V+ + 0.1 V. Within V– – 0.1 V to V+ – 2 V, full specifications apply. Operation beyond V+ – 2 V up to V+ + 0.1 V is functional but with degraded parameters: offset voltage increases to 7 mV, CMRR drops to 65 dB, and GBW reduces to 0.7 MHz. TLV171QDBVRQ1 thus provides extended input range-not full rail-to-rail input with guaranteed specs across the entire range.

What is the ESD robustness of the TLV171QDBVRQ1, and how is it validated?

TLV171QDBVRQ1 is rated per AEC-Q100: Human Body Model (HBM) ±4000 V and Charged Device Model (CDM) ±500 V. These values are measured on the DBV (SOT-23-5) package per JESD22-A114 and JESD22-C101 standards. The device integrates on-chip ESD protection diodes on all pins, enabling reliable handling during assembly and operation in electrically noisy automotive environments without external clamping.

Can the TLV171QDBVRQ1 be used in dual-supply configurations with asymmetric rails?

Yes - TLV171QDBVRQ1 operates with any combination of V+ and V– as long as |V+ – V–| is between 4.5 V and 36 V. For example, V+ = +12 V and V– = –5 V (17 V total) is valid. Input common-mode range remains referenced to the actual V– and V+ pins, so signals must stay within (V–) – 0.1 V to (V+) – 2 V for full performance. TLV171QDBVRQ1 does not require symmetric supplies.

How does the phase-reversal protection in TLV171QDBVRQ1 function during overvoltage events?

When input voltage exceeds the linear common-mode range (e.g., > V+ – 2 V in noninverting mode), TLV171QDBVRQ1's internal circuitry limits the output to the appropriate rail instead of inverting polarity. This prevents erroneous logic states or latch-up in downstream comparators or ADC references. Unlike conventional op amps, TLV171QDBVRQ1 avoids catastrophic failure or system reset during load-dump-induced transients - confirmed in Figure 26 of SBOS858.