TLC070CD

The TLC070CD is a high-performance Current Differencing Amplifier (CDA) amplifier, also known as a transimpedance amplifier. Designed for high accuracy transimpedance measurements, the TLC070CD employs a revolutionary architecture which combines the best characteristics of a current-difference input topology with advanced silicon gain-stage technologies to provide a versatile and low-noise instrumentation amplifier.

The TLC070CD is an ideal solution for instrumentation applications such as strain gauge and other sensors, photodiode amplifiers, or general-purpose charge amplifiers. With its wide dynamic range and ±1.5mA maximum output current, it is capable of driving capacitive, inductive, or resistor loads and can provide variable gain capability through the use of a voltage feedback network.

TLC070CD design features a number of innovative upgrades, such as ultra-low noise, high common-mode rejection, wide dynamic range, high precision, and zero-drift operation. This amplifier’s low noise performance makes it suitable for many tasks where low-level signals must be detected, such as distributed sensing and low-level instrumentation applications. The TLC070CD’s wide dynamic range permits higher input levels to be amplified, while the wide differential input voltage range allows for high-precision transimpedance measurements.

The TLC070CD is an ideal solution for a variety of instrumentation applications, such as:

• Strain gauge and other sensors
• Photodiode amplifiers
• General-purpose charge amplifiers

The TLC070CD uses an interesting combination of a current-difference input topology and silicon gain-stage technologies. The amplification performance comes from a combination of the gain-stage technologies and the input-stage topology. The TLC070CD’s excellent common-mode rejection ratio is the result of the input-stage topology, and its wide dynamic range is the result of the gain-stage technologies.

The TLC070CD relies on a feedback circuit which is made up of two transimpedance amplifier (TIA) gain stages, connected in a differential configuration. The output of the first TIA is internally connected to the -input of the second TIA, while the +input is externally connected to the (+) high-impedance node of the circuit. The two stages are cascaded such that the output of the first stage is the negative feedback voltage for the second stage. This yields a higher common-mode rejection ratio compared to a single-stage amplifier, as the negative feedback voltage cancels out any common-mode voltage present at the input.

The TLC070CD’s wide dynamic range is provided by the combination of two transistors, each with its own gain. The use of two transistors in gain-stage configuration allows for higher gains for larger input signals, while at the same time providing the necessary protection against high-frequency input signal excursions. This yields a wide dynamic range which permits higher input levels to be amplified with minimal distortion.

In conclusion, the TLC070CD is a high-performance current differencing amplifier (CDA) designed for high-accuracy instruments which require extensive transimpedance measurement capabilities. Its innovative design features, such as ultra-low noise performance and wide dynamic range, make it suitable for a variety of instrumentation applications. Furthermore, it incorporates a feedback circuit which provides a high common-mode rejection ratio and excellent stability under different operating conditions.