AD640BPZ

Voltage - Input Offset:	50µV
Base Part Number:	AD640
Supplier Device Package:	20-PLCC (9x9)
Package / Case:	20-LCC (J-Lead)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	±4.5 V ~ 7.5 V
Current - Output / Channel:	2.3mA
Current - Supply:	35mA
Series:	--
Current - Input Bias:	7µA
-3db Bandwidth:	350MHz
Slew Rate:	--
Output Type:	--
Number of Circuits:	1
Amplifier Type:	Logarithmic
Part Status:	Active
Packaging:	Tube

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The AD640BPZ is a popular device for amplifier and buffer applications, and is commonly used in instrumentation. This device is particularly useful for systems where a low noise output is required, such as when amplifying signals in medical equipment or industrial test and measurement systems. This guide will explain the application field and working principle of the AD640BPZ.The AD640BPZ is a low noise DC-coupled wideband voltage amplifier. It incorporates a bipolar transistor input stage and a complementary output stage, which offer a high level of performance and a wide gain range. This device is capable of a wide range of gains, from 0.01 to 20,000, and can be used in single supply or dual supply configurations.The AD640BPZ is ideal for a variety of applications, including active filters, medical ultrasound transducers, and amplifying low-level biomedical signals. It can also be used in instrumentation circuits, such as oscilloscopes, voltmeters, and digital multimeters, to convert differential input signals to single-ended output signals. The low noise levels and wide bandwidth of the device make it particularly suitable for low noise applications, such as the amplification of small and low-level signals.The AD640BPZ features a bandwidth of 500 MHz and a maximum gain variation of no more than 0.1dB over the entire frequency range. This means that the device can accurately amplify signals over a wide range of frequencies, without introducing any significant distortion. Additionally, the device can be used in either single supply or dual supply configurations to provide a wide gain range and excellent performance over a variety of signals.The AD640BPZ is also thermally stable, and its operating temperature range is from -40°C to +85°C. This makes it ideal for use in a variety of applications, including those where temperature extremes or adverse temperatures may be encountered. Because the device is housed in a 3-Pin TO-72 package, it can be mounted directly onto a printed circuit board (PCB).The working principle of the AD640BPZ is quite simple. The device is composed of two transistors, a source-follower and an emitter-follower. The two transistors are connected in series and have their base electrodes connected to the control inputs. When a control signal is applied to the inputs, it is amplified by the first transistor and is then further amplified by the second transistor. The amplified output is then taken from the emitter terminal of the second transistor. The gain of the amplifier is determined by the ratio of the voltage gain of the two transistors.The AD640BPZ is a popular choice for instrumentation, active filter and low noise biomedical signal amplification applications due to its wideband frequency response and low noise. It features good thermal stability, a wide gain range, and is available in both single and dual supply configurations. With its low noise, wide bandwidth, and low distortion, the device is well suited for amplifying low-level signals, such as those encountered in biomedical or industrial test and measurement applications.

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