LM13700 consists of two current controlled 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. High impedance buffers complement the dynamic range of the amplifier.
Through-hole DIL-16 package
Forward transconductance adjustable over 6 decades
Excellent gm linearity
Excellent matching between amplifiers
High output signal-to-noise ratio
Applications include current-controlled amplifiers, current-controlled oscillators, multiplexers, timers, sample-and-hold circuits
Bandwidth
2MHz
Number of Amplifiers
2
Op Amp Type
LM13700N
Operating Temperature Range
0 to +70°C
Package/Case
DIL-16
Supply Voltage
36V
Reviews
A design classic
Reviewed by: Christopher Hunter - Friday, April 6, 2018
This dual Operational Transconductance Amplifier chip is a true design classic. I've made use of them in designs for years. Unfortunately, they tend to add some distortion to audio passing through them, and they're noisier than modern op-amps, but with smart design, these limitations can be overcome. The channel matching is excellent, and if used as a variable gain element in the negative feedback loop of a high quality op-amp, most of the limitations are overcome. In the feedback loop of an NE5532, I get <0.01% THD and around -110dB noise - perfectly acceptable in a music production environment.
