NJM13700M-TE2 双跨导放大器

技术规格

电路数 Number of Circuits	2
电源电压（最低） Supply Voltage (minimum)
电源电压（最大） Supply Voltage (maximum)
输入失调电压 Input Offset Voltage	0.4mV
输入失调电流 Input Offset Current	100nA
输入偏置电流 Input Bias Current	400nA
电源电流 Supply Current	2.6mA
增益带宽积 Gain Bandwidth product
压摆率 Slew Rate	50V/μs
噪音 Noise

详细描述

跨导放大器在两个方面与标准运算放大器不同：
输出是恒流源，其输出与输入电压成正比。
增益，或更准确地说，跨导，通过调节通过偏置端子的电流在外部设置。这控制了恒流源的幅度。
这些独特的功能无需使用负反馈即可提供准确的增益。这消除了可能导致传统放大器振荡的闭环相移。

表面贴装 NJM13700M 由两个压控电流（跨导）放大器组成，每个放大器都具有差分输入和推挽输出。

两个放大器共享公共电源，但在其他方面独立运行。

在输入端提供线性化二极管以减少失真并允许更高的输入电平。结果是信噪比改善了 10dB，参考 THD 为 0.5%。

提供受控阻抗缓冲器，旨在补充放大器的动态范围。

输出直流电平与输入偏置电流无关。

The transconductance amplifier differs from the standard op-amp in two ways:
The output is a constant current source whose output is proportional to the input voltage.
The gain,or more correctly,the transcondutance,is set externally by the adjustment of the current through the bias terminal.This controls the magnitude of the constant current source.
These unique features offer accurate gain without the use of negative feedback.This eliminates closed loop phase shift which can cause oscillations in conventional amplifiers.

The surface mount NJM13700M consists of two voltage controlled current (transconductance) amplifiers each with differential inputs and a push pull output.

The two amplifiers share common supplies but otherwise operate independently.

Linearising diodes are provided at the inputs to reduce distortion and allow higher input levels.The result is a 10dB signal to noise improvement referenced to 0.5% THD.

Controlled impedance buffers are provided which are designed to complement the dynamic range of the amplifiers.

Output dc levels are independant of input bias currents.