Overview
The TS922EIJT is a rail-to-rail dual BiCMOS operational amplifier produced by STMicroelectronics. It is optimized and fully specified for 3 V and 5 V operations, making it suitable for a wide range of applications, particularly in high-quality, low-voltage, or battery-operated systems. The device features high output currents, very low noise, low distortion, and low offset voltage, which are crucial for high-performance audio and other sensitive applications.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Vio (Input Offset Voltage) | Tmin ≤ Tamb ≤ Tmax | 3 | - | 1.5 (TS922EIJT), 0.9 (TS922A) | mV |
| Iio (Input Offset Current) | Vout = VCC/2 | 1 | - | 30 | nA |
| VOH (High Level Output Voltage) | RL = 10 kΩ | 2.90 | - | - | V |
| VOL (Low Level Output Voltage) | RL = 10 kΩ | 50 | - | - | mV |
| Avd (Large Signal Voltage Gain) | RL = 10 kΩ, Vout = 2 Vp-p | 70 | - | 200 | V/mV |
| ICC (Total Supply Current) | No load, Vout = VCC/2 | 2 | - | 3.2 | mA |
| GBP (Gain Bandwidth Product) | RL = 600 Ω | - | - | 4 | MHz |
| CMR (Common Mode Rejection Ratio) | Vicm = 0 to 3 V | 60 | - | 80 | dB |
| SVR (Supply Voltage Rejection Ratio) | VCC = 2.7 to 3.3 V | 60 | - | 85 | dB |
| Io (Output Short-Circuit Current) | - | 50 | - | 80 | mA |
| SR (Slew Rate) | - | 0.7 | - | 1.3 | V/μs |
| en (Equivalent Input Noise Voltage) | f = 1 kHz | - | - | 9 | nV/√Hz |
Key Features
- Rail-to-rail input and output: Allows the amplifier to operate with input and output signals that range from the negative to the positive supply voltage.
- Low noise: 9 nV/√Hz: Minimizes noise in the output signal, making it suitable for high-quality audio and sensitive applications.
- Low distortion: Ensures that the output signal is a faithful representation of the input signal.
- High output current: 80 mA: Capable of driving low-load impedances, such as 32 Ω loads.
- High-speed: 4 MHz, 1 V/μs: Supports high-frequency applications with a fast slew rate.
- Operating from 2.7 to 12 V: Flexible supply voltage range for various application needs.
- Low input offset voltage: 900 μV max. (TS922A): Reduces the error in the output signal due to input offset.
- ESD internal protection: 2 kV: Protects the device from electrostatic discharge.
- Latch-up immunity: Prevents the device from entering an unintended high-current state.
Applications
- Headphone amplifier: Ideal for driving headphones with high-quality audio.
- Sound cards and multimedia systems: Suitable for applications requiring low noise and high-quality audio.
- Line drivers and actuator drivers: Can drive low-load impedances effectively.
- Servo amplifier: Used in servo systems requiring precise control.
- Mobile phone and portable equipment: Optimized for low-voltage, battery-operated devices.
- Instrumentation with low noise as key factor: Suitable for sensitive measurement instruments.
- Piezoelectric speaker driver: Can drive piezoelectric speakers efficiently.
Q & A
- What is the input offset voltage of the TS922A?
The input offset voltage of the TS922A is 900 μV max.
- What is the maximum output current of the TS922?
The maximum output current of the TS922 is approximately 80 mA.
- What is the gain bandwidth product of the TS922?
The gain bandwidth product of the TS922 is 4 MHz.
- What is the slew rate of the TS922?
The slew rate of the TS922 is 0.7 to 1.3 V/μs.
- What is the equivalent input noise voltage of the TS922?
The equivalent input noise voltage of the TS922 is 9 nV/√Hz at 1 kHz.
- What is the common mode rejection ratio (CMR) of the TS922?
The CMR of the TS922 is 60 to 80 dB.
- What is the supply voltage range for the TS922?
The TS922 operates from 2.7 to 12 V.
- Does the TS922 have ESD protection?
Yes, the TS922 has internal ESD protection up to 2 kV.
- What are some common applications of the TS922?
The TS922 is commonly used in headphone amplifiers, sound cards, multimedia systems, line drivers, servo amplifiers, and instrumentation with low noise requirements.
- Is the TS922 stable for capacitive loads?
Yes, the TS922 is stable for capacitive loads up to 500 pF.
