Performance characteristics
Operating voltage (+2 to +6V)
Current consumption (when V+=3V, generally 2.2mA)
Current consumption in standby mode (typically 0.1μA)
The output power exceeds 250mW (V+=6V, RL=32Ω)
Adjustable gain (GVD=0-43dB, telephone audio band)
Load impedance (RL=8-200Ω)
Bipolar technology
Package (DIP8, DMP8, SSOP8, MSOP8(VSP8)*MEET JEDEC MO-187-DA,
MSOP8(TVSP8)*MEET JEDEC MO-187-DA / THIN TYPE)
summary
NJM2149 is an audio power amplifier designed for telephone applications. Due to the use of differential output, there is no need for an external coupling capacitor. The closed loop gain is adjusted by 2 external resistors. Use the CD terminal to mute the input signal while reducing current consumption. Compared with NJM2135, NJM2149 can reduce the switching noise and external high frequency noise when switching to standby mode. It is suitable for mobile phones, cordless phones, push-button phones and other speaker amplifier applications.
