XD13600 Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers

Product Overview

The XINLUDA XD13600 is a dual operational transconductance amplifier (OTA) with linearizing diodes and buffers, designed for analog signal processing, filters, oscillators, and multipliers. It is a fully functional equivalent to Texas Instruments’ LM13600N, delivering comparable electrical performance while offering notable advantages in cost-efficiency, supply assurance, and integration flexibility.

Functional Compatibility and Architecture

Both the XD13600 and LM13600N feature two independent OTAs with differential inputs and push-pull outputs, along with internal linearizing diodes to improve distortion performance. Additionally, both integrate output buffer stages, allowing direct driving of loads and simplified circuit design.

Advantage: XD13600 is fully functionally compatible with LM13600N, enabling seamless design substitution and reuse in signal chain applications.

Electrical Performance

The XD13600 delivers key performance parameters on par with LM13600N, including:

• Input Offset Voltage: Typically within ±2 mV

• Transconductance (gm): Adjustable up to 2000 µS (typical)

• Low Harmonic Distortion: Enhanced by integrated linearizing diodes

• Wide Operating Voltage Range: ±2V to ±18V

These parameters ensure robust analog processing in audio, sensor, and control systems.

Advantage: Comparable signal linearity and gain control range, meeting the needs of precision analog applications.

Buffer Output Characteristics

Both devices incorporate Darlington buffer outputs, making them suitable for driving moderate loads. The buffers in XD13600 are designed with high input impedance and low output impedance, improving driving capability in capacitive and resistive loads—ideal for filters and oscillators.

Advantage: High-performance buffering with low signal degradation across a broad output range.

Package and Pin Compatibility

XD13600 and LM13600N are both supplied in standard 16-pin DIP (PDIP-16) and SOIC-16 packages, with identical pin configurations. This allows XD13600 to serve as a pin-to-pin drop-in replacement for LM13600N in existing designs without PCB or firmware modifications.

Advantage: Simplified design migration and supply chain flexibility due to full package and pinout equivalency.

Operating Temperature and Reliability

XD13600 is qualified for the –40°C to +85°C industrial temperature range, the same as LM13600N, ensuring reliable operation in a wide variety of environmental conditions. XINLUDA subjects each device to stringent electrical and reliability tests during manufacturing to guarantee consistent quality.

Advantage: Proven performance in industrial environments with robust reliability assurance.

Sourcing and Cost Benefits

One of the key advantages of the XD13600 is its more competitive pricing and improved supply availability, especially important during global shortages or long lead times experienced with legacy analog parts like the LM13600N. XINLUDA provides consistent production and shorter lead times, which are essential for maintaining production schedules in high-volume applications.

Advantage: Better procurement flexibility, more predictable sourcing, and lower total BOM cost.

Conclusion

The XINLUDA XD13600 offers a reliable, cost-efficient, and functionally equivalent alternative to the LM13600N, with the following key strengths:

• Fully compatible OTA architecture with built-in buffers and linearizing diodes

• Equal analog performance in terms of gain linearity, offset, and bandwidth

• Drop-in DIP-16/SOIC-16 package compatibility

• Lower power consumption and enhanced thermal reliability

• Superior availability and reduced cost for scalable deployment

With its strong combination of performance and sourcing advantages, XD13600 is an excellent choice for analog signal processing tasks in professional audio, industrial control, and instrumentation systems.