NJM2171AR-TE1#

Overview

The NJM2171AR-TE1 is a low voltage stereo headphone amplifier designed for portable audio equipment. It operates on dual supplies: V+1 ranges from 1.8V to 4.5V, and V+2 ranges from 0.9V to 4.5V. Typical operating current is 450 µA at V+1=2.3V and 700 µA at V+2=1.2V. Supply current in power down mode is typically 10 µA at V+1=2.3V and 25 µA at V+2=1.2V. Output power exceeds 5mW into a 16Ω load with 10% THD. The device features a fixed voltage gain of 11.5dB typical and utilizes Bipolar technology.

Feature Summary

• Integrated mute and standby circuits requiring minimal external components
• Low current consumption with very low turn-noise in standby mode
• Direct battery supply operation suitable for portable devices

Applications

• Portable Mini-Disc players
• Portable Compact-Disc players
• Headphone amplifier applications

Procurement Notes

Verify the component status as discontinued or obsolete through official manufacturer channels before design finalization. Confirm RoHS compliance status, as datasheet records may vary by production batch. Ensure the 10-VSP package outline matches the target PCB footprint. Validate that the dual-supply architecture (V+1 and V+2) aligns with the system power budget and available rails.

Selection Notes

Select this component for designs requiring low-voltage stereo amplification with integrated control functions. The dual-supply configuration allows optimization of output swing and noise performance. Consider the fixed gain and bipolar technology characteristics when matching input stages. Verify thermal dissipation capabilities within the specified operating temperature range for the intended enclosure.

Part Context

This part belongs to the NJM2171A series of low voltage headphone amplifiers manufactured by Nisshinbo Micro Devices Inc. The series is engineered specifically for portable audio applications where power efficiency and low noise are critical. The AR suffix indicates the specific tape and reel packaging format for surface mount assembly.

Replacement Considerations

Check for direct pin-compatible alternatives within the NJM217x family if availability is an issue. Verify that any substitute maintains the dual-supply requirement and similar power-down current specifications.

FAQ

How does the standby function operate?

The IC becomes non-active when the STBY pin (Pin 4) is driven high. When driven low, the IC becomes active.

What is the effect of the MUTE pin?

When the MUTE pin (Pin 7) is high, the IC does not output the signal. When low, the IC outputs the signal.