Overview
The TS921IDT is a rail-to-rail high output current single operational amplifier produced by STMicroelectronics. This BiCMOS operational amplifier is optimized and fully specified for operation at 3 V and 5 V. It is designed to provide high output current, low noise, and low distortion, making it an excellent choice for high-quality, low-voltage or battery-operated audio systems. The TS921IDT is stable for capacitive loads up to 500 pF and features internal ESD protection and latch-up immunity.
Key Specifications
| Parameter | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| VCC Supply Voltage | 2.7 | 12 | V | ||
| Vio Input Offset Voltage | Tmin. ≤ Tamb ≤ Tmax | 3 | 5 | mV | |
| ΔVio Input Offset Voltage Drift | 2 | μV/°C | |||
| Iio Input Offset Current | Vout = 1.5 V | 1 | 30 | nA | |
| Iib Input Bias Current | Vout = 1.5 V | 15 | 100 | nA | |
| VOH High Level Output Voltage | RL = 600 Ω | 2.87 (VCC=3V), 4.85 (VCC=5V) | V | ||
| VOL Low Level Output Voltage | RL = 600 Ω | 180 (VCC=3V), 300 (VCC=5V) | mV | ||
| Avd Large Signal Voltage Gain | Vout = 2 Vpk-pk, RL = 600 Ω | 35 | V/mV | ||
| GBP Gain Bandwidth Product | RL = 600 Ω | 4 | MHz | ||
| ICC Supply Current | No load, Vout = VCC/2 | 1 | 1.5 | mA | |
| SR Slew Rate | 0.7 | 1.3 | V/μs | ||
| Io Output Short-Circuit Current | 50 | 80 | mA | ||
| en Equivalent Input Noise Voltage | f = 1 kHz | 9 | nV/√Hz | ||
| THD Total Harmonic Distortion | Vout = 2 Vpk-pk, f = 1 kHz, Av = 1, RL = 600 Ω | 0.005 | % |
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 V to 12 V
- Internal ESD protection: 1.5 kV
- Latch-up immunity
- Stable for capacitive loads up to 500 pF
Applications
- Headphone amplifier
- Piezoelectric speaker driver
- Sound cards, multimedia systems
- Line driver, actuator driver
- Servo amplifier
- Mobile phone and portable communication sets
- Instrumentation with low noise as a key factor
Q & A
- What is the operating voltage range of the TS921IDT?
The TS921IDT operates from 2.7 V to 12 V.
- What is the maximum output current of the TS921IDT?
The maximum output current is approximately 80 mA.
- What is the gain bandwidth product of the TS921IDT?
The gain bandwidth product is 4 MHz.
- Does the TS921IDT have internal ESD protection?
Yes, it has internal ESD protection up to 1.5 kV.
- What are the typical applications of the TS921IDT?
Typical applications include headphone amplifiers, piezoelectric speaker drivers, sound cards, multimedia systems, line drivers, actuator drivers, servo amplifiers, and mobile phone and portable communication sets.
- What is the slew rate of the TS921IDT?
The slew rate is between 0.7 V/μs and 1.3 V/μs.
- Is the TS921IDT stable for capacitive loads?
Yes, it is stable for capacitive loads up to 500 pF.
- What is the common mode rejection ratio (CMR) of the TS921IDT?
The CMR is between 60 dB and 80 dB.
- What is the total harmonic distortion (THD) of the TS921IDT?
The THD is 0.005% at Vout = 2 Vpk-pk, f = 1 kHz, Av = 1, RL = 600 Ω.
- What are the package options available for the TS921IDT?
The TS921IDT is available in DIP8, SO-8, and TSSOP8 packages.
