STMicroelectronics TS924AIN

Overview

TS924AIN from STMicroelectronics is a rail-to-rail input/output quad operational amplifier optimized for 3 V and 5 V battery-powered audio systems. It delivers 80 mA output current (driving 32 Ω loads), 4 MHz gain bandwidth, 1.3 V/µs slew rate, 9 nV/√Hz input voltage noise, and 900 µV max input offset voltage (TS924A grade), enabling high-fidelity headphone amplification and piezoelectric speaker driving.

For engineers reviewing the TS924AIN datasheet, TS924AIN pinout, TS924AIN application, or TS924AIN equivalent, key selection criteria include rail-to-rail operation at 2.7–12 V supply, low-noise performance in audio-band frequencies, high capacitive load stability (up to 500 pF), and guaranteed 80 mA short-circuit output current per channel.

Technical Context

The TS924AIN uses BiCMOS process technology to achieve simultaneous rail-to-rail input common-mode range (V_CC− − 0.2 V to V_CC+ + 0.2 V) and rail-to-rail output swing (within 180 mV of rails at 10 kΩ load). Its 4 MHz unity-gain bandwidth and 68° phase margin ensure stable operation with 100 pF capacitive loads.

Each amplifier features independent biasing with 1.5 mA typical supply current per channel, 80 dB CMRR over 0–5 V common-mode range, and 85 dB PSRR across 2.7–5 V supply variation - enabling robust performance in mixed-signal PCB layouts with shared power domains.

Key Specifications

Pinout & Package

TS924AIN is supplied in SO14 (plastic small outline) package per JEDEC MS-012, with 1.27 mm pitch and 8.55–8.75 mm body length. Pin 1 is marked by notch or dot; pin numbering follows standard counter-clockwise sequence from top view.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad rail-to-rail op-amp applications.

Compared with TS924IPT, TS924AIN offers lower thermal resistance for sustained 80 mA output in compact audio modules; compared with TS922ID, it provides two additional independent amplifiers in same SO14 footprint - enabling consolidated signal conditioning for multi-sensor systems without increasing board area.

Availability

TS924AIN is available at Aetrix Electronics and suitable for headphone amplifiers, piezoelectric speaker drivers, and sound card line drivers requiring stable component supply across industrial temperature ranges (−40 °C to +125 °C) and long-lifecycle production programs.

Supply support for TS924AIN 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

The TS92x series targets low-voltage, low-noise analog signal conditioning - specifically engineered for battery-powered audio, portable instrumentation, and multimedia peripherals where rail-to-rail operation and high output drive are mandatory.

FAQ

What is the maximum capacitive load the TS924AIN can drive while maintaining stability?

The TS924AIN remains stable with capacitive loads up to 500 pF when configured as a unity-gain buffer, as verified in Figure 3 and Figure 5 of the official datasheet. This specification applies under standard test conditions (V_CC = ±1.5 V, R_L = 10 kΩ, T_amb = 25 °C). For loads exceeding 500 pF, an isolation resistor (typically 10–47 Ω) must be placed in series with the output to preserve phase margin.

Does the TS924AIN support true single-supply operation down to 2.7 V?

Yes - the TS924AIN operates fully specified from 2.7 V to 12 V single supply, with rail-to-rail input common-mode range extending from V_CC− − 0.2 V to V_CC+ + 0.2 V and rail-to-rail output swing within 180 mV of each rail at 10 kΩ load. All key parameters (GBW, SR, noise, THD) are guaranteed across this range per Tables 3 and 4 in the datasheet.

How does the TS924AIN's 80 mA output current translate to practical load capability?

The 80 mA rating is the continuous short-circuit output current per channel, meaning it can sustain 80 mA into a dead-short load without damage. In practice, this enables direct driving of 32 Ω headphones (requiring ~94 mA peak for 3 V_pk sine wave), 600 Ω line drivers (with 5 V headroom), and piezo elements requiring fast voltage slewing - all without external transistor stages.

Is the TS924AIN pin-compatible with other ST quad op-amps like the TS914?

No - the TS924AIN uses standard SO14 pinout for quad op-amps (inverting/non-inverting inputs and outputs arranged per channel), but the TS914 employs different internal architecture and lacks rail-to-rail output capability. Pin mapping differs for supply pins and channel ordering; direct replacement would require PCB layout revision and circuit revalidation due to differing AC performance and output stage behavior.