The UTC TDA2822 OPAMP monolithic integrated audio amplifier in a 8-Pin plastic dual in line package. It is designed for portable cassette players and radios.The OPA1632 is a fully-differential amplifier designed • Superior Sound Quality.
for driving high-performance audio analog-to-digital
• Ultra Low Distortion: 0.000022% converters (ADCs). It provides the highest audio
• Low Noise: 1.3 nV/√Hz quality, with very low noise and output drive
• High Speed: characteristics optimized for this application. The
OPA1632’s excellent gain bandwidth of 180 MHz and
– Slew Rate: 50 V/μsvery fast slew rate of 50 V/μs produce exceptionally
– Gain Bandwidth: 180 MHz low distortion. Very low input noise of 1.3 nV/√Hz
• Fully Differential Architecture: further ensures maximum signal-to-noise ratio and
dynamic range,,The flexibility of the fully differential architecture
• Wide Supply Range: ±2.5 V to ±16 V allows for easy implementation of a single-ended to
On the B40 there is a 470µF cap on the output, between the LM386 output and the speaker. On the LM386’s TI datasheet Figure 10 there is a 250µF cap in that spot. It’s not an unreasonable leap to surmise that someone thought, “Hmmm, a 470 would probably work there and I’ve got a bunch of them.” I can’t find anything in the datasheet explaining the need for the capacitor. It may be that there is some DC offset in the output that needs to be removed.
FEATURES of TDA2822 OPAMP:
- Maximum Supply Voltage VCC 15 V
- Output Peak Current:1A
- Power Dissipation:1W
- Operating Temperature :-20 ~ +70 °C
- Storage Temperature: -40 ~ +150 °C
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