STMicroelectronics TS922IN

Summary of TS922IN Dual Rail-to-Rail Op Amp from STMicroelectronics

The TS922IN from STMicroelectronics is a dual operational amplifier designed for general purpose applications requiring rail-to-rail input and output performance. Packaged in an industry-standard 8-pin DIP (Mini DIP), this op amp is distinguished by its ability to deliver high output currents, making it well-suited for both low-impedance loads and battery-powered systems. TS922IN is part of the TS922 family and is optimized for supply voltages commonly found in audio, instrumentation, and multimedia equipment. The device features BiCMOS technology and comes qualified for automotive environments per AEC-Q100, broadening its applicability to demanding use cases.

Highlights and Technologies of the TS922IN

TS922IN incorporates a set of features aimed at providing robust amplification with minimal signal distortion. Its rail-to-rail architecture enables both input and output voltage swings close to supply rails, maximizing dynamic range. Important technical highlights include:

Dual-channel, general purpose amplifier configuration.

High output current capability up to 80 mA, suitable for driving loads as low as 32 Ω.

Low distortion (THD), supporting high-fidelity audio and measurement applications.

Low input noise voltage, rated at 9 nV/√Hz, critical for sensitive instrumentation.

Fast slew rate (up to 1.3 V/μs) and wide gain-bandwidth product (4 MHz), allowing for rapid signal transitions and extended frequency response.

Internal ESD protection (up to 2 kV) and latch-up immunity, ensuring reliability in harsh environments.

TS922IN is stable for capacitive loads up to 500 pF, further expanding its versatility for direct connection to a range of output impedances. With an operating temperature range spanning -40°C to +125°C, the device caters to industrial and automotive-grade designs.

Maximum Ratings and Suggested Operating Conditions for TS922IN

Safe and reliable implementation of TS922IN relies on observing its specified absolute maximum ratings and recommended operating conditions. Key values include:

Supply voltage (Vcc): Maximum of 14 V; recommended operating span is 2.7 V to 12 V.

Differential input voltage: ±1 V, with external series resistance required if exceeded.

Input voltage range: (Vcc-) −0.3 V to (Vcc+) +0.3 V.

Output short-circuit current: 80 mA max; note that the device lacks internal short-circuit protection.

Operating ambient temperature: -40°C to +125°C; storage temperature down to -65°C and up to +150°C.

ESD ratings: 2 kV (Human Body Model), among others.

It’s critical for system designers to manage thermal dissipation appropriately, especially during output short-circuits, to avoid destructive heating. The device’s mounting options and thermal resistance specifics (such as Rthja for DIP package) should also inform PCB layout and heat management considerations.

TS922IN Electrical Specs and Performance Metrics

TS922IN’s electrical performance encompasses several aspects fundamental to both analog and mixed-signal designs:

Input offset voltage: Typical 0.9 mV (TS922A variant), with low drift and bias currents.

Output voltage swing: Close to supply rails at various load conditions. For RL = 32 Ω, minimum output high is 2.63 V at 3 V supply, and 4.4 V at 5 V supply.

Supply current: Typical total supply current is 2 mA to 3.2 mA under no load.

Gain bandwidth product: Characterized at 4 MHz, supporting wideband signal amplification.

Common-mode rejection ratio (CMRR): 60–80 dB, key for differential signal integrity.

Slew rate: Up to 1.3 V/μs, enabling fast edge response in time-domain applications.

Noise and distortion: Input noise voltage at 6–9 nV/√Hz; total harmonic distortion typically 0.005%, crucial for audio-quality designs.

Channel separation: 120 dB, further supporting high-performance multi-channel systems.

These parameters enable engineers to predict linearity, headroom, and fidelity for TS922IN within target systems.

TS922IN Packaging Details and Installation Choices

The TS922IN is supplied in an 8-pin Mini DIP package with a 0.300" (7.62 mm) footprint. Its through-hole mounting format makes it suitable for both prototyping and production designs requiring mechanical robustness. Thermal considerations are addressed with published junction-to-ambient thermal resistance ratings, and the device supports standard soldering temperatures for both leaded (250°C) and unleaded (260°C) assembly.

Environmental compliance is robust, with the TS922IN meeting RoHS3 and REACH requirements, and supplied with moisture sensitivity level 1 (unlimited storage time).

Use Cases for TS922IN Dual Operational Amplifier

TS922IN’s feature set targets a wide range of systems. Among typical applications are:

Line drivers and actuator control circuits, leveraging the device’s high output current.

Portable and battery-powered speakers, benefiting from rail-to-rail swing and low power consumption.

Instrumentation amplifiers where low noise and distortion are paramount, such as audio measurement rigs and sensor data acquisition.

Multimedia systems where high-fidelity operation and minimal inter-channel crosstalk are essential.

Automotive and industrial modules, facilitated by extended temperature support and AEC-Q100 qualification.

The op amp’s ability to drive capacitive loads and low impedances without stability problems makes it a compelling choice for direct-coupled analog outputs.

TS922IN Characteristic Curves and Performance Evaluation

Analysis of TS922IN’s characteristic curves reveals its performance envelope across load and signal conditions:

Output short-circuit current versus output voltage demonstrates the device’s capability to both source and sink up to 80 mA across a wide supply range.

Voltage gain and phase plots validate high-frequency stability and predictable frequency response, supporting critical filter or amplifier functions.

Input noise curves and THD vs. frequency/output voltage graphs allow designers to evaluate suitability for audio and precision signal applications.

Channel separation and phase margin data underscore the device’s integrity in multi-channel analog systems.

Real-world scenarios include low-distortion line driving, sensor front-ends requiring minimal input offset, and robust battery-operated platforms where supply voltage can vary—a situation the TS922IN’s SVR response handles efficiently.

Possible Substitute or Alternative Models for TS922IN

Since TS922IN is marked as obsolete, engineers sourcing for active production may require alternative models with comparable specifications. Consider the following replacements or equivalents from STMicroelectronics or other manufacturers:

TS922A (STMicroelectronics): Offers similar architecture, low offset, and high output capabilities, with ongoing support.

Other rail-to-rail dual op amps such as TLV2372 (Texas Instruments), LMV358 (STMicroelectronics), or MCP6022 (Microchip): Each provides dual-channel rail-to-rail operation, with varying speed, noise, and power profiles to match specific design requirements.

In selecting an alternative, match key criteria such as supply voltage range, output current capability, bandwidth, and package format. Form-fit, function, and environmental qualifications (automotive, RoHS, REACH) should guide the final component choice.

Conclusion

on TS922IN selection and usage

TS922IN, as a dual rail-to-rail operational amplifier, stands out for its combination of high output current, low noise, and robust electrical characteristics, ideally tailored to demanding audio, instrumentation, and automotive applications. While its obsolete status necessitates consideration of equivalent models, the technical insights and characteristic curves associated with TS922IN provide a reliable foundation for component selection and performance prediction in new designs.

Engineers and procurement teams should evaluate current availability, production status, and comparative specifications when planning new platforms or legacy maintenance, ensuring that the chosen op amp delivers the desired blend of fidelity, robustness, and cost-effectiveness for the intended circuit environment.