Overview
The TSU111ICT operational amplifier, produced by STMicroelectronics, is a nanopower, high-accuracy CMOS op-amp designed for low-power applications. It features an ultra-low current consumption of 900 nA typical and 1.2 µA maximum when supplied by 3.3 V, making it ideal for battery-powered and portable devices. The TSU111ICT operates within a supply voltage range of 1.5 V to 5.5 V, allowing it to be efficiently powered by a coin-type Lithium battery or a regulated voltage. Its high accuracy of 150 µV max. and 11.5 kHz gain bandwidth product make it suitable for sensor signal conditioning and various low-power applications.
Key Specifications
| Parameter | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Supply Current (Icc) | Vcc = 3.3 V, 25 °C | - | 900 nA | 1.2 µA | A |
| Input Offset Voltage (Vio) | T = 25 °C | - | 150 µV | 235 µV | µV |
| Input Offset Voltage Drift (ΔVio/ΔT) | -40 °C < T < 85 °C | - | - | 1.4 µV/°C | µV/°C |
| Input Bias Current (Iib) | T = 25 °C | - | 10 pA | 50 pA | pA |
| Supply Voltage Range | - | 1.5 V | - | 5.5 V | V |
| Gain Bandwidth Product (GBP) | RL = 1 MΩ, CL = 60 pF | - | 11.5 kHz | - | kHz |
| Slew Rate (SR) | RL = 1 MΩ, CL = 60 pF | - | 2.5 V/ms | - | V/ms |
| ESD Tolerance | HBM | - | - | 4 kV | V |
Key Features
- Sub-micro ampere current consumption: Icc = 900 nA typ. at 25 °C
- Low offset voltage: 150 µV max. at 25 °C, 235 µV max. over full temperature range (-40 to 85 °C)
- Low noise over 0.1 to 10 Hz bandwidth: 3.6 µVpp
- Low supply voltage: 1.5 V to 5.5 V
- Rail-to-rail input and output
- Gain bandwidth product: 11.5 kHz typ.
- Low input bias current: 10 pA max. at 25 °C
- High tolerance to ESD: 4 kV HBM
- More than 25 years of typical equivalent lifetime supplied by a 220 mA.h CR2032 coin type Lithium battery
- High accuracy without calibration
- Tolerance to power supply transient drops
Applications
- Gas sensors: CO, O2, and H2S
- Alarms: PIR sensors
- Signal conditioning for energy harvesting and wearable products
- Ultra long-life battery-powered applications
- Battery current sensing
- Active RFID tags
Q & A
- What is the typical supply current of the TSU111ICT?
The typical supply current of the TSU111ICT is 900 nA at 25 °C when supplied by 3.3 V.
- What is the input offset voltage of the TSU111ICT?
The input offset voltage of the TSU111ICT is 150 µV max. at 25 °C and 235 µV max. over the full temperature range (-40 to 85 °C).
- What is the gain bandwidth product of the TSU111ICT?
The gain bandwidth product of the TSU111ICT is 11.5 kHz typical.
- What is the ESD tolerance of the TSU111ICT?
The TSU111ICT has a high tolerance to ESD with a rating of 4 kV HBM.
- What is the operating temperature range of the TSU111ICT?
The operating temperature range of the TSU111ICT is -40 °C to 85 °C.
- What types of applications is the TSU111ICT suitable for?
The TSU111ICT is suitable for gas sensors, alarms, signal conditioning for energy harvesting and wearable products, ultra long-life battery-powered applications, battery current sensing, and active RFID tags.
- What is the supply voltage range of the TSU111ICT?
The supply voltage range of the TSU111ICT is 1.5 V to 5.5 V.
- Does the TSU111ICT have rail-to-rail input and output?
Yes, the TSU111ICT has rail-to-rail input and output.
- How long can the TSU111ICT operate on a CR2032 coin type Lithium battery?
The TSU111ICT can operate for more than 25 years on a 220 mA.h CR2032 coin type Lithium battery.
- Does the TSU111ICT require calibration for high accuracy?
No, the TSU111ICT does not require calibration for high accuracy.
