Overview
The TS922 and TS922A devices, produced by STMicroelectronics, are rail-to-rail dual BiCMOS operational amplifiers optimized and fully specified for 3 V and 5 V operations. These amplifiers are designed to offer high output currents, enabling them to drive low-load impedances effectively. Key characteristics include very low noise, low distortion, low offset voltage, and high output current capability, making them ideal for high-quality, low-voltage, or battery-operated audio systems. The devices are stable for capacitive loads up to 500 pF.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2.7 | 12 | V | |
| Input Offset Voltage (Vio) | 3 mV (TS922) | 0.9 mV (TS922A) | 1.5 mV (TS922IJ) | mV |
| Input Offset Current (Iio) | 1 nA | 30 nA | 30 nA | nA |
| High Level Output Voltage (VOH) | 2.90 V (RL=10kΩ) | 2.87 V (RL=600Ω) | 2.63 V (RL=32Ω) | V |
| Low Level Output Voltage (VOL) | 50 mV (RL=10kΩ) | 100 mV (RL=600Ω) | 180 mV (RL=32Ω) | mV |
| Large Signal Voltage Gain (Avd) | 200 V/mV (RL=10kΩ) | 35 V/mV (RL=600Ω) | 16 V/mV (RL=32Ω) | V/mV |
| Total Supply Current (Icc) | 2 mA | 3 mA | 3.2 mA | mA |
| Gain Bandwidth Product (GBP) | 4 MHz | MHz | ||
| Common Mode Rejection Ratio (CMR) | 60 dB | 80 dB | dB | |
| Supply Voltage Rejection Ratio (SVR) | 60 dB | 85 dB | dB | |
| Output Short-Circuit Current (Io) | 50 mA | 80 mA | mA | |
| Slew Rate (SR) | 0.7 V/μs | 1.3 V/μs | V/μs | |
| Equivalent Input Noise Voltage (en) | 9 nV/√Hz | nV/√Hz |
Key Features
- Rail-to-rail input and output
- Low noise: 9 nV/√Hz
- Low distortion
- High output current: 80 mA (able to drive 32 Ω loads)
- High-speed: 4 MHz, 1 V/μs
- Operating from 2.7 to 12 V
- Low input offset voltage: 900 μV max. (TS922A)
- ESD internal protection: 2 kV
- Latch-up immunity
Applications
- Line drivers and actuator drivers
- Portable speakers and headphone amplifiers
- Instrumentation with low noise as a key factor
- Multimedia systems and portable equipment
- Servo amplifiers
- Piezoelectric speaker drivers
- Mobile phones and other portable devices
Q & A
- What is the operating voltage range of the TS922 and TS922A operational amplifiers?
The TS922 and TS922A operational amplifiers operate from 2.7 to 12 V.
- What is the maximum output current of the TS922 and TS922A?
The maximum output current is approximately 80 mA.
- What is the gain bandwidth product (GBP) of the TS922 and TS922A?
The gain bandwidth product (GBP) is 4 MHz.
- What is the common mode rejection ratio (CMR) of the TS922 and TS922A?
The common mode rejection ratio (CMR) is between 60 dB and 80 dB.
- What is the slew rate of the TS922 and TS922A?
The slew rate is between 0.7 V/μs and 1.3 V/μs.
- What is the equivalent input noise voltage of the TS922 and TS922A?
The equivalent input noise voltage is 9 nV/√Hz.
- Do the TS922 and TS922A have ESD protection?
Yes, they have internal ESD protection up to 2 kV.
- What are the typical applications of the TS922 and TS922A?
Typical applications include line drivers, actuator drivers, portable speakers, instrumentation, multimedia systems, and portable equipment.
- Are the TS922 and TS922A stable for capacitive loads?
Yes, they are stable for capacitive loads up to 500 pF.
- What is the input offset voltage of the TS922A?
The input offset voltage of the TS922A is 900 μV max.
