Overview
The TLC2652CN is a high-precision chopper-stabilized operational amplifier produced by Texas Instruments. It utilizes the Advanced LinCMOS process, which, combined with unique chopper-stabilization circuitry, achieves extremely high DC precision. This device is designed to continuously null input offset voltage, reducing variations in temperature, time, common-mode voltage, and power supply voltage. The TLC2652CN is ideal for low-level signal processing applications due to its high input impedance and low noise characteristics.
Key Specifications
| Parameter | Test Conditions | Typical | Maximum |
|---|---|---|---|
| Input Offset Voltage (VIO) | 25°C | 1 µV | 3 µV |
| Temperature Coefficient of Input Offset Voltage | Full range | 0.003 µV/°C | 0.03 µV/°C |
| Input Offset Current (IIO) | 25°C | 2 pA | 60 pA |
| Input Bias Current (IIB) | 25°C | 4 pA | 60 pA |
| Common-Mode Input Voltage Range (VICR) | Full range | -5 V to 3.1 V | -5 V to 3.1 V |
| Large-Signal Differential Voltage Amplification (AVD) | VO = ±4 V, RL = 10 kΩ | 135 dB | 150 dB |
| Common-Mode Rejection Ratio (CMRR) | VO = 0, VIC = VICRmin | 120 dB | 140 dB |
| Supply-Voltage Rejection Ratio (kSVR) | VDD± = ±1.9 V to ±8 V | 110 dB | 135 dB |
| Supply Current (IDD) | No load | 1.5 mA | 2.4 mA |
| Positive Slew Rate at Unity Gain (SR+) | VO = ±2.3 V, RL = 10 kΩ, CL = 100 pF | 2 V/µs | 2.8 V/µs |
Key Features
- Extremely low input offset voltage (1 µV max) and low change in offset voltage with temperature (0.003 µV/°C typ).
- Low input offset current (2 pA max at TA = 25°C).
- High common-mode rejection ratio (CMRR) and supply-voltage rejection ratio (kSVR) of 120 dB and 110 dB, respectively.
- Single-supply operation with common-mode input voltage range including the negative rail.
- No noise degradation with external capacitors connected to VDD−.
- Fast overload recovery time and optional output clamp pin for further reduction in recovery time.
- Internal ESD-protection circuits up to 2000 V as tested under MIL-STD-883C, Method 3015.2.
Applications
The TLC2652CN is suitable for various low-level signal processing applications, including:
- Strain gauges and other transducer amplifiers.
- Thermocouple amplifiers.
- Single-supply or split-supply configurations.
- Applications requiring high precision and low noise, such as medical devices and precision instrumentation.
Q & A
- What is the input offset voltage of the TLC2652CN? The input offset voltage is 1 µV max at 25°C.
- How does the input offset voltage change with temperature? The temperature coefficient of input offset voltage is 0.003 µV/°C typ.
- What is the input offset current of the TLC2652CN? The input offset current is 2 pA max at 25°C.
- Can the TLC2652CN operate on a single supply? Yes, it supports single-supply operation with the common-mode input voltage range including the negative rail.
- What is the common-mode rejection ratio (CMRR) of the TLC2652CN? The CMRR is 120 dB min.
- How does the TLC2652CN protect against ESD? It incorporates internal ESD-protection circuits up to 2000 V as tested under MIL-STD-883C, Method 3015.2.
- What are the typical applications of the TLC2652CN? It is used in strain gauges, thermocouple amplifiers, and other low-level signal processing applications.
- Can the TLC2652CN be used in high-temperature environments? Yes, it is characterized for operation from -40°C to 125°C for the Q-suffix devices and -55°C to 125°C for the M-suffix devices.
- How many external capacitors are required for the operation of the TLC2652CN? Two external capacitors are required for operation.
- What is the supply current of the TLC2652CN? The supply current is 1.5 mA typ at no load.
