Texas Instruments TL972ID

Overview

TL972ID from Texas Instruments is a dual rail-to-rail output operational amplifier optimized for low-noise audio preamplification and portable battery-powered systems. It delivers 4.4 nV/√Hz input voltage noise, ±2.4 V output swing at ±2.5 V supply, 10.6 MHz gain-bandwidth product, and operates from 2.7 V to 12 V single or dual supply. It is used in high-fidelity headphone amplifiers and sensor signal conditioning stages.

For engineers reviewing the TL972ID datasheet, TL972ID pinout, TL972ID application, or TL972ID equivalent, key selection considerations include its rail-to-rail output capability under low-voltage operation, verified 4.4 nV/√Hz noise floor at 100 kHz, guaranteed –40°C to +125°C performance, and SOIC-8 package compatibility with standard PCB layouts for dual op-amp signal chains.

Technical Context

The TL972ID implements a complementary-input-stage architecture enabling true rail-to-rail output swing while maintaining stable phase margin (≥60°) across 2.7–12 V supply range and capacitive loads up to 250 pF. Its input stage uses paralleled NMOS and PMOS differential pairs to extend common-mode range to both supply rails, with specified CMRR of 90 dB and PSRR of 70 dB at 25°C.

It supports unity-gain stable operation with 2 kΩ load and 100 pF capacitive load, delivering 65 mA output source/sink current and 125 dB large-signal voltage gain. Input offset voltage is ±0.21 mV (typ), with drift of ±0.25 µV/°C - enabling precision DC-coupled audio and instrumentation paths without external trimming.

Key Specifications

Pinout & Package

TL972ID is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 6.00 mm, with standard 1.27 mm pitch and gull-wing leads compatible with automated SMT assembly and IPC-7351B footprints.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-noise operational amplifier applications.

Compared with OPA2376AIDR and LMV793MA/NOPB, TL972ID uniquely balances rail-to-rail output swing, 4.4 nV/√Hz noise, and 10.6 MHz bandwidth - making it optimal for dual-channel audio and sensor signal chains where output headroom and low-frequency fidelity are jointly constrained.

Availability

TL972ID is available at Aetrix Electronics and suitable for portable audio equipment, industrial sensor nodes, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL972ID 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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.

The TL97x family was developed specifically for low-voltage, low-noise signal conditioning in battery-powered and space-constrained applications - emphasizing rail-to-rail output drive, thermal stability, and audio-grade distortion performance.

FAQ

What is the maximum supply voltage rating for TL972ID?

The absolute maximum supply voltage for TL972ID is 15 V, but the recommended operating range is 2.7 V to 12 V. Exceeding 12 V may degrade long-term reliability and is not characterized for performance parameters. The device is fully specified across this 2.7–12 V range, including input offset, noise, and bandwidth metrics - ensuring design confidence without derating.

Does TL972ID support rail-to-rail input operation?

No, TL972ID features rail-to-rail *output* swing only. Its input common-mode range extends from VCC– + 1.15 V to VCC+ – 1.15 V - a 2.3 V exclusion zone near each rail. This differs from true rail-to-rail input op-amps like OPA2376. For applications requiring full-rail input sensing, external level-shifting or alternative devices must be considered.

What is the typical output current capability of TL972ID?

TL972ID delivers ±65 mA output current per amplifier (source and sink) at 25°C, as specified in the Electrical Characteristics table. This enables direct driving of moderate-impedance loads such as 32 Ω headphones or 600 Ω line outputs without external buffers. Current capability decreases with temperature and supply voltage - consult Figure 5-12 and Figure 5-13 in the datasheet for derating curves.

Can TL972ID be used in single-supply configurations?

Yes, TL972ID operates reliably in single-supply mode with VCC+ connected to the positive rail (e.g., 3.3 V or 5 V) and VCC– grounded. Its rail-to-rail output allows full-swing signal delivery from near 0 V to near VCC+, and the input common-mode range accommodates signals from 1.15 V to VCC+ – 1.15 V. A mid-rail bias network is required for AC-coupled inputs to maintain proper DC operating point.

Is TL972ID pin-compatible with other dual op-amps in SOIC-8 packages?

TL972ID follows the industry-standard dual op-amp pinout for SOIC-8: pins 1/7 = outputs, 2/6 = inverting/non-inverting inputs per channel, 4 = V–, 8 = V+. It is pin-compatible with TL072, NE5532, and OPA234 - but electrical characteristics differ significantly. Direct substitution requires verification of noise, bandwidth, output drive, and input stage behavior in the target circuit.