NJM2135D

Overview

The NJM2135D is a low voltage audio power amplifier designed for speaker drivers, utilizing bipolar technology and featuring a differential output that eliminates the need for external coupling capacitors. It operates within a supply voltage range of +2V to +16V. The device provides an output power exceeding 250mW at V+=6V with a 32Ω load. Key electrical characteristics include a typical operating current of 2.7mA in normal mode and 0.1µA in power down mode. The closed loop gain is adjustable via two external resistors, offering a range from 0 to 43dB in the voice band.

Feature Summary

• Differential output architecture removes the requirement for external coupling capacitors
• Low supply current consumption in both active and power down modes
• Adjustable closed-loop gain controlled by two external resistors

Applications

• Speaker drivers
• Portable battery powered equipment
• Cellular phones

Procurement Notes

Verify the specific package type during procurement as the NJM2135 series includes multiple variants such as DIP8, DMP8, SIP8, SSOP8, and VSP8. Ensure the selected component matches the required physical footprint for the target PCB design. Confirm availability status as some variants may be marked Not Recommended for New Design (NRND). Cross-reference the manufacturer part number with distributor listings to ensure correct identification of the DIP8 package version.

Selection Notes

Select this component when designing circuits requiring a single-supply audio amplifier without bulky output capacitors. Consider the 2V to 16V operating range for compatibility with various battery voltages. Evaluate the thermal performance based on the specified power dissipation limits at different ambient temperatures. Ensure the load impedance falls within the 8Ω to 200Ω range for optimal performance and distortion specifications.

Part Context

The NJM2135D belongs to the NJM2135 series of low voltage audio power amplifiers manufactured by Nisshinbo Micro Devices. This series utilizes bipolar technology and is available in several package outlines including DIP8, DMP8, SIP8, SSOP8, and VSP8. The device is engineered for applications where space constraints and power efficiency are critical, serving as a driver for speakers in portable electronic devices.

Replacement Considerations

Check for other NJM2135 variants like NJM2135M or NJM2135V if package differences exist. Verify pinout compatibility before substitution. Some older versions may carry NRND status.