The STMicroelectronics TS912IN is a high-performance dual operational amplifier designed to operate from a single supply voltage or dual supplies. Its architecture makes it especially suitable for low-voltage, low-power applications while maintaining good bandwidth and low input offset characteristics. Packaged in an 8-pin PDIP, the TS912IN is ideal for analog signal conditioning in battery-powered systems, industrial monitoring, and instrumentation.
General Description
The TS912IN integrates two independent op-amps and is optimized for rail-to-rail output operation, offering full dynamic range even in single-supply configurations. It features low offset voltage, high slew rate, and a relatively wide gain-bandwidth product, ensuring precision in both DC and AC signal conditioning applications. This device belongs to ST’s TS91x series, known for its low-voltage operation and robust input/output behavior.
Key Features
* Low Offset Voltage: Max 3 mV
* Low Input Bias Current: Max 500 nA
* Wide Supply Voltage Range: 2.7 V to 12 V (or ±1.35 V to ±6 V for dual-supply)
* Rail-to-Rail Output: Ensures maximum output swing
* Unity Gain Stable: Allows use in voltage-follower applications
* High Output Drive Capability: Supports moderate loads
* Low Supply Current: Typical 1 mA per amplifier
* Low Distortion and Noise: Suitable for audio and sensor applications
* No Crossover Distortion: Clean linearity across output range
Typical Applications
* Sensor signal conditioning
* Active filters
* Battery-operated devices
* Portable medical instruments
* Low-voltage industrial automation systems
* Analog front-ends in microcontroller-based systems
Electrical Characteristics (at VCC = 5V, TA = 25°C unless otherwise specified)
| Parameter | Typical Value | Maximum Value | Unit |
| --------------------------------------- | ----------------------- | ------------- | ---- |
| Input Offset Voltage (VIO) | 1 mV | 3 mV | mV |
| Input Bias Current (IIB) | 100 nA | 500 nA | nA |
| Input Offset Current (IIO) | 5 nA | 50 nA | nA |
| Supply Voltage Range | 2.7 – 12 | — | V |
| Output Voltage Swing (high, RL = 10 kΩ) | VCC – 0.05 V | — | V |
| Output Voltage Swing (low, RL = 10 kΩ) | 0.03 V | — | V |
| Gain Bandwidth Product | 1.2 MHz | — | MHz |
| Slew Rate | 0.5 V/µs | — | V/µs |
| Supply Current per Amplifier | 1 mA | 1.5 mA | mA |
| CMRR (Common Mode Rejection Ratio) | 70 dB | 60 min | dB |
| PSRR (Power Supply Rejection Ratio) | 70 dB | 60 min | dB |
| Output Current Capability | ±40 mA | — | mA |
Pin Configuration (8-Pin PDIP)
1. Output A
2. Inverting Input A
3. Non-Inverting Input A
4. V− (Ground)
5. Non-Inverting Input B
6. Inverting Input B
7. Output B
8. V+ (Supply)
Functional Advantages
* Rail-to-Rail Output: Enables full output range utilization, improving dynamic signal swing especially in low-voltage designs.
* Low Supply Operation: Operates efficiently in 3.3 V and 5 V systems, as well as dual ±5 V analog environments.
* No Crossover Distortion: Ensures fidelity for audio and precision analog applications.
Reliability and Robustness
* Operating temperature range: –40°C to +125°C
* ESD protection up to 2 kV (HBM)
* Latch-up immunity compliant with JEDEC standards
Packaging Information
* Package Type: PDIP-8
* RoHS compliant and lead-free
The TS912IN is a versatile, reliable operational amplifier that balances precision, power efficiency, and full-range output capability, making it suitable for a broad range of analog signal processing tasks.
