LM13700N

Overview

The LM13700N is a dual operational transconductance amplifier (OTA) featuring linearizing diodes and high-impedance output buffers. It operates on supply voltages from 9.5 V to 32 V (single) or ±4.75 V to ±16 V (dual). Key electrical parameters include an open-loop bandwidth of 2 MHz, a slew rate of 50 V/µs, and a maximum input offset voltage of 4 mV. The device supports a forward transconductance range over six decades with excellent channel matching.

Feature Summary

• Adjustable transconductance over six decades via external bias current
• Integrated linearizing diodes at inputs to reduce distortion
• High-impedance output buffers with bias currents independent of amplifier bias
• Excellent gain tracking between the two independent channels

Applications

• Current-controlled amplifiers
• Stereo audio amplifiers
• Voltage-controlled filters
• Voltage-controlled oscillators
• Multiplexers

Procurement Notes

Verify the specific package marking and manufacturer lot code against the official datasheet revision F documentation. Confirm that the component meets the absolute maximum ratings for supply voltage and power dissipation within the specified operating temperature range of 0°C to 70°C. Ensure proper thermal management is applied as the junction-to-ambient resistance is 43.8°C/W in the PDIP-16 package.

Selection Notes

Select this component when a dual-channel OTA with integrated buffering is required. The LM13700N is suitable for applications demanding high linearity through its internal linearizing diodes. Consider the PDIP-16 package constraints regarding thermal dissipation and board space compared to surface-mount alternatives if higher integration density is needed.

Part Context

The LM13700N belongs to the LM13700 series of dual operational transconductance amplifiers manufactured by Texas Instruments. It is functionally similar to the LM13600 but includes additional linearizing diodes and buffers. The 'N' suffix denotes the 16-pin Plastic Dual In-Line Package (PDIP).

Replacement Considerations

LM13700M/NOPB

FAQ

How do the output buffers differ from those in the LM13600?

The LM13700N output buffers have input bias currents that are independent of the amplifier bias current (IABC), resulting in different DC output levels compared to the LM13600.

What is the purpose of the linearizing diodes?

The linearizing diodes are provided at the inputs to reduce output distortion and allow for higher input signal levels while maintaining linearity.