Overview
The TLC2652AC-8D 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, ensures extremely high DC precision. This amplifier is designed to null input offset voltage continuously, even during variations in temperature, time, common-mode voltage, and power supply voltage. It also significantly reduces low-frequency noise voltage, making it ideal for low-level signal processing applications such as strain gauges, thermocouples, and other transducer amplifiers.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VIO) | 1 µV | 0.6 µV | 3 µV | µV |
| Temperature Coefficient of Input Offset Voltage | 0.003 µV/°C | 0.003 µV/°C | 0.03 µV/°C | µV/°C |
| Input Offset Current | - | - | 500 pA | pA |
| Large-Signal Differential Voltage Amplification (AVD) | 135 dB | 120 dB | 150 dB | dB |
| Common-Mode Rejection Ratio (CMRR) | 120 dB | 120 dB | 140 dB | dB |
| Supply-Voltage Rejection Ratio (kSVR) | 110 dB | 110 dB | 135 dB | dB |
| Supply Current (IDD) | 1.5 mA | 1.5 mA | 2.4 mA | mA |
| Positive Slew Rate at Unity Gain | 2 V/µs | 1.5 V/µs | 2.8 V/µs | V/µs |
| Negative Slew Rate at Unity Gain | 2.3 V/µs | 1.9 V/µs | 3.1 V/µs | V/µs |
| Phase Margin at Unity Gain | 48° | 48° | 48° | ° |
Key Features
- Extremely low input offset voltage (1 µV max) and low temperature coefficient of input offset voltage (0.003 µV/°C typ).
- Low input offset current (500 pA max at TA = −55°C to 125°C).
- High large-signal differential voltage amplification (135 dB min) and common-mode rejection ratio (120 dB min).
- 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 to reduce recovery time further.
- Internal ESD-protection circuits up to 2000 V as tested under MIL-STD-883C, Method 3015.2.
- Available in various temperature ranges: 0°C to 70°C (C-suffix), −40°C to 85°C (I-suffix), −40°C to 125°C (Q-suffix), and −55°C to 125°C (M-suffix).
Applications
The TLC2652AC-8D is particularly suited for low-level signal processing applications, including:
- Strain gauges
- Thermocouples
- Other transducer amplifiers
- Single-supply or split-supply configurations
- Applications requiring extremely low noise and high precision.
Q & A
- What is the primary advantage of the TLC2652AC-8D operational amplifier?
The primary advantage is its extremely low input offset voltage and low temperature coefficient of input offset voltage, making it highly precise for low-level signal processing.
- What is the typical input offset voltage of the TLC2652AC-8D?
The typical input offset voltage is 1 µV.
- What is the temperature range for the TLC2652AC-8D?
The temperature range for the C-suffix devices is 0°C to 70°C.
- Does the TLC2652AC-8D support single-supply operation?
Yes, it supports single-supply operation with a common-mode input voltage range that includes the negative rail.
- How does the TLC2652AC-8D handle ESD protection?
The device incorporates internal ESD-protection circuits that prevent functional failures at voltages up to 2000 V as tested under MIL-STD-883C, Method 3015.2.
- What are some common applications for the TLC2652AC-8D?
Common applications include strain gauges, thermocouples, and other transducer amplifiers.
- Can the TLC2652AC-8D be used in split-supply configurations?
Yes, it can be used in both single-supply and split-supply configurations.
- How does the TLC2652AC-8D manage overload recovery time?
The device has innovative circuit techniques for fast overload recovery time, and an optional output clamp pin can further reduce the recovery time.
- What is the supply current of the TLC2652AC-8D?
The supply current is typically 1.5 mA.
- Does the TLC2652AC-8D require external components for operation?
Yes, two external capacitors are required for operation, but the on-chip chopper-control circuitry is transparent to the user.
