Texas Instruments TL34071AD

Overview

TL34071AD from Texas Instruments is a single-channel, A-grade (low-offset) bipolar operational amplifier optimized for precision single-supply operation. It delivers 4.5 MHz gain-bandwidth product, 13 V/µs slew rate, 1.1 µs settling time to 0.1%, ±2 V to ±22 V supply range, and input common-mode range extending to ground (VCC−). It is used in industrial sensor signal conditioning and analog front-end stages requiring rail-to-rail-compatible output swing and low THD (0.02%).

For engineers reviewing the TL34071AD datasheet, TL34071AD pinout, TL34071AD application, or TL34071AD equivalent, this page provides verified electrical specifications, D-package pin mapping, real-world use cases in single-supply instrumentation, and two validated alternative op-amps with documented functional and thermal differences.

Technical Context

The TL34071AD employs a Darlington transistor input stage enabling high input resistance (150 MΩ), low input offset voltage (≤3 mV), and low bias current (≤1.5 µA). Its all-NPN output stage eliminates crossover distortion and supports symmetrical sourcing/sinking into capacitive loads up to 10,000 pF.

It operates across 0°C to 70°C with guaranteed performance at ±15 V and +5 V/0 V supplies. The device features output short-circuit protection, 60° phase margin (CL = 0), and 12 dB gain margin - ensuring stable unity-gain and closed-loop configurations without external compensation.

Key Specifications

Pinout & Package

TL34071AD is supplied in an 8-pin SOIC (D package), surface-mount, tape-and-reel compatible format (TL34071ADR). Pin 1 is OFFSET N1 (offset null), Pin 2 is IN−, Pin 3 is IN+, Pin 4 is VCC−/GND, Pin 5 is NC (no internal connection), Pin 6 is VCC+, Pin 7 is OUT, and Pin 8 is OFFSET N2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL34071D, TL34071AD guarantees tighter offset (≤3 mV) for improved DC accuracy in sensor interfaces; compared with OPA2340UA, it offers superior drive strength (±80 mA), bipolar input matching, and proven stability with heavy capacitive loads - making it preferred for industrial analog front-ends demanding ruggedness and predictable AC performance.

Availability

TL34071AD is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, single-supply data acquisition front-ends, and active filter stages in power supply monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TL34071AD 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 with emphasis on reliability, scalability, and broad application coverage.

The TL34071AD belongs to TI's legacy TL3407x family of bipolar op-amps designed for cost-sensitive industrial instrumentation where wide supply range, ground-sensing inputs, and robust capacitive drive are essential - not for ultra-low-power or rail-to-rail I/O applications.

FAQ

What is the maximum supply voltage rating for TL34071AD?

The TL34071AD has an absolute maximum supply voltage rating of ±22 V (VCC+ ≤ +22 V, VCC− ≥ −22 V), per the datasheet's Absolute Maximum Ratings table. Operation beyond this risks permanent damage. For reliable long-term use, TI recommends staying within the recommended operating range of ±2 V to ±22 V, with derating applied above 25°C ambient per the Dissipation Rating Table for the D package.

Does TL34071AD support true single-supply operation with input signals at ground potential?

Yes, TL34071AD supports true single-supply operation with input signals referenced to ground. Its input common-mode voltage range explicitly includes VCC− (i.e., ground when VCC− = 0 V), allowing direct connection of 0–5 V sensor outputs without level-shifting circuitry. This is confirmed in both the "Wide Input Common-Mode Range Includes Ground (VCC−)" feature bullet and the Recommended Operating Conditions table (VIC min = 0 V at VCC = 5 V).

What is the purpose of Pins 1 and 8 (OFFSET N1 and OFFSET N2) on TL34071AD?

Pins 1 and 8 on TL34071AD are offset null terminals used together with an external 10-kΩ potentiometer to trim input offset voltage to ≤1 mV. A 10-kΩ pot is connected between Pins 1 and 8, with its wiper tied to VCC−. This configuration allows fine adjustment of the internal input stage bias, critical in high-gain DC-coupled applications where even 3 mV offset would cause significant output error.

Can TL34071AD drive a 10,000 pF capacitive load without instability?

Yes, TL34071AD is specifically characterized for stable operation driving up to 10,000 pF, as stated in the "Large Capacitance Drive Capability" feature and verified by phase margin measurements (60° at CL = 0, 40° at CL = 300 pF). While stability degrades with larger loads, the device remains usable up to 10 nF in many configurations - especially when combined with appropriate series output resistance or isolation techniques per TI Application Report SLOA020.

How does the TL34071AD differ from the TL33071AD in terms of temperature range and application suitability?

TL34071AD is specified for 0°C to 70°C (commercial grade), while TL33071AD extends to −40°C to 105°C (industrial/vehicular grade). Both share identical electrical specs (GBW, slew rate, offset, etc.), but TL33071AD undergoes extended temperature screening and qualification. Use TL34071AD for indoor, controlled-environment applications like lab instruments or office equipment; choose TL33071AD for outdoor, automotive, or factory-floor deployments where ambient extremes are expected.