Key facts
- Brand
- STMicroelectronics
- Model
- TS925
- Category
- amplifier
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-06
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ST AN1282 handbook
This document details an audio application circuit using the TS925, an input/output rail-to-rail quad BiCMOS operational amplifier capable of operating with low supply voltages (2.7V) and driving low output loads such as 32Ω. The circuit utilizes two operators in a preamplifier configuration and two others in a push-pull configuration to drive a headset.
The preamplifier section achieves a gain of 58dB using specific resistor values (R4=22kΩ, R3=500Ω, R17=1.2kΩ, R6=47kΩ, R5=1.2kΩ) or can be adjusted using a JFET transistor for automatic level control (ALC). The headphone amplifier drives a 32Ω load directly from stereo inputs, demonstrating the device's ability to provide high fidelity and maximum output swing.
STMicroelectronics TS925 specifications
| Supply Voltage | 2.7V |
|---|---|
| Output Load | 32Ω |
| Preamplifier Gain | 58dB |
Source: ST AN1282 handbook
All STMicroelectronics TS925 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What type of operational amplifier is the TS925?
The TS925 is an input/output rail to rail quad BiCMOS operational amplifier.
From: ST AN1282 handbook
What is the power supply configuration for the example circuit?
The power supply is delivered from two LR6 batteries (2x1.5V nominal).
From: ST AN1282 handbook
What is the standby mode current consumption?
The standby mode current is 6 µA when Pin 9 is grounded.
From: STMicroelectronics TS925 Rail-to-Rail Quad Operational Amplifier Datasheet
What is the maximum output current of the TS925?
The TS925 can source up to 80 mA of output current.
From: STMicroelectronics TS925 Rail-to-Rail Quad Operational Amplifier Datasheet