Texas Instruments TLV8801DBVT

Overview

TLV8801DBVT from Texas Instruments is a single-channel nanopower operational amplifier designed for ultra-low-power sensing in battery-constrained systems. It delivers 320 nA typical supply current, 4.5 mV max offset voltage, rail-to-rail output swing within 3.5 mV of rails at 1.8 V, and operates from 1.7 V to 5.5 V. It is used in electrochemical gas sensors (e.g., CO detectors) where femtoamp input bias current and EMI immunity preserve signal integrity.

For engineers reviewing the TLV8801DBVT datasheet, TLV8801DBVT pinout, TLV8801DBVT application, or TLV8801DBVT equivalent, key selection criteria include its 6 kHz unity-gain bandwidth, –40°C to 125°C operating range, 1 µV/°C offset drift, low-noise transimpedance capability with >10 MΩ feedback resistors, and SOT-23 package compatibility with space-limited IoT sensor nodes.

Technical Context

The TLV8801DBVT employs a CMOS input stage enabling ≤100 fA input bias current-critical for high-impedance electrochemical sensor interfaces and transimpedance amplifiers with megaohm feedback networks. Its input common-mode range extends to the negative rail (V–), supporting true single-supply operation without level-shifting circuitry.

Internally compensated for unity-gain stability, it achieves 6 kHz gain-bandwidth while maintaining 120 dB open-loop gain and 87 dB CMRR at 5 V supply. Built-in EMI protection mitigates interference from mobile phones, WiFi, and RFID readers-essential for portable safety-critical detectors.

Key Specifications

Pinout & Package

TLV8801DBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts in portable medical and environmental sensors.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nanopower op-amp applications.

Compared with LPV801DBVT and TLV8541DBVR, TLV8801DBVT offers the lowest power consumption for long-life electrochemical sensing, trades 1 mV offset for 130 nA lower quiescent current than LPV801DBVT, and avoids layout redesign required by TLV8541DBVR's higher supply current and thermal dissipation.

Availability

TLV8801DBVT is available at Aetrix Electronics and suitable for gas detectors, PIR motion sensors, and portable medical equipment requiring stable component supply across extended production lifecycles.

Supply support for TLV8801DBVT 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV8801DBVT belongs to TI's nanopower op-amp product line, engineered specifically for battery- and energy-harvesting–powered sensing applications demanding femtoamp input bias, rail-to-rail output, and EMI resilience.

FAQ

What is the maximum capacitive load the TLV8801DBVT can drive without external isolation?

The TLV8801DBVT is unity-gain stable but sensitive to capacitive loading. It can reliably drive ≤50 pF directly. For loads exceeding 50 pF-such as ADC input capacitance plus PCB trace capacitance-the datasheet recommends adding a 30–50 kΩ isolation resistor (R_ISO) between the TLV8801DBVT output and the capacitive node to prevent peaking or oscillation. This configuration maintains stability while preserving DC accuracy in gas sensor signal chains.

Does the TLV8801DBVT support true rail-to-rail input common-mode range?

The TLV8801DBVT input common-mode range extends from V− to (V+) – 0.9 V-not fully rail-to-rail on the positive side. However, it does include the negative rail (V−), enabling accurate sensing of signals referenced to ground in single-supply systems. This design eliminates the need for level-shifting in potentiostat circuits where the reference electrode connects to V−, a key requirement in three-terminal electrochemical sensors.

How does the TLV8801DBVT's EMI protection function in real-world deployments?

The TLV8801DBVT integrates on-die EMI filtering that attenuates RF interference from 100 MHz to 2.5 GHz-including cellular bands (700–2700 MHz), WiFi (2.4/5 GHz), and Bluetooth (2.4 GHz). In CO detector validation tests, this reduced RF-induced offset voltage shift from >15 µV (unprotected op-amps) to <2 µV when placed adjacent to active smartphones, ensuring reliable alarm triggering without false positives.

Can the TLV8801DBVT be used in a transimpedance amplifier with a 100 MΩ feedback resistor?

Yes-the TLV8801DBVT's ≤100 fA input bias current makes it suitable for transimpedance amplifiers using feedback resistors up to 100 MΩ. At that value, input bias contributes <10 µV of error-well below the 4.5 mV offset specification. To ensure stability, a feedback capacitor (e.g., 0.3–1 pF) must be added in parallel with the resistor to compensate for stray capacitance and maintain phase margin above 45°.

What is the recommended PCB layout practice for minimizing noise in TLV8801DBVT sensor interfaces?

For optimal noise performance, route the TLV8801DBVT's +IN and −IN traces as short, matched, guarded differential pairs; place a solid ground plane beneath the amplifier and sensor connections; isolate high-impedance nodes from digital switching traces; and use 0603 or smaller ceramic decoupling capacitors (100 nF + 1 µF) placed within 2 mm of the V+ and V− pins. Avoid vias in sensitive analog paths to prevent parasitic inductance that degrades EMI rejection.