LT1125ACN#PBF

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LT1125ACN#PBF Application Field and Working Principle

Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps

The LT1125ACN#PBF is a precision low power operational amplifier from Linear Technologies. This chip is ideal for use in high-end instrumentation and data acquisition applications. The amplifier is a single-supply rail-to-rail in/out voltage amplifier and its wide gain-bandwidth product make it suitable for use in video, medical, and scientific settings. The LT1125ACN#PBF also provides excellent Offset Voltage Correction and Unity Gain Stability which makes it an ideal choice for inline signal conditioning.

The LT1125ACN#PBF is capable of delivering very low (< 0.5μV) Offset Voltage Correction and high TBW (Transconductance Bandwidth) (> 10MHz). This combination of features allows this amplifier to provide fast signal conditioning with excellent noise performance, even in noisy environments where data rates are high. The LT1125ACN#PBF is also an ideal choice for low power applications since its power consumption is less than 1 mA.

Working Principle

The LT1125ACN#PBF is a rail-to-rail input–output, single supply amplifier. It has a maximum output swing of ±4V with a gain ranging from 0V/V to 2.4V/V. The device can be operated from ±2.5V to ±15V single or dual supplies and from 2.7V to 15V single supply. It has a mid-rail input offset voltage at 1mV and an input common-mode voltage range from –1.1V to VDD-1.1V.

The LT1125ACN#PBF contains an internal compensation capacitor and a Unity-Gain Stable Bandwidth of >10MHz. This feature ensures that the gain is independent of the load, making it possible to use multiple amplifiers in a multi-channel setup, with only minor changes in performance. The device also has excellent AC and DC parameters, making it suitable for low-level signal measurements and instrumentation applications.

Another major feature of the LT1125ACN#PBF is its low power consumption. It can operate from a single supply and consumes only 0.75 mA at full power. This low power feature makes it possible to use the amplifier in battery powered devices such as medical instruments or remote sensing devices. The LT1125ACN#PBF also features high common mode rejection and power supply rejection levels, making it suitable for noise sensitive circuits.

The LT1125ACN#PBF also features fast transient response and high slew rate, further improving its performance in high-speed applications. It can respond and produce output signals at a rate of up to 5V/μs and can drive a 3kΩ load with a Gain Bandwidth Product of >=8MHz and fast settling time of only 15ns.

Applications

The LT1125ACN#PBF’s low power, wide input common-mode range and high slew rate makes it an ideal choice for high performance instrumentation applications. The device can be used in medical instruments such as ECG or EEG recording devices as well as in scientific data acquisition and control systems. Due to the low Offset Voltage Correction, the device can be used for measuring low-level signals, often found in laboratories. The LT1125ACN#PBF’s low-power consumption makes it ideal for portable or battery powered devices.

The amplifier is also well-suited for audio applications, due to its low power consumption, high slew rate, and low distortion. The device can be used in low-power audio amplifiers and mixers as well as audio mixing consoles, due to its high Gain Bandwidth Product. The device can also be used in video applications, due to its wide input common-mode range and fast output signals, making it suitable for analog-to-digital video conversion.

In summary, the LT1125ACN#PBF is an ideal choice for instrumentation and data acquisition applications. Its wide gain-bandwidth product, low power consumption, low Offset Voltage Correction, Unity Gain Stability and fast transient response make it a great choice for precision signal conditioning.

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