PA4894 Unisonic Technologies, PA4894 Datasheet
PA4894
Related parts for PA4894
PA4894 Summary of contents
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... The UTC PA4894 can be directly connected to a battery without an LDO since it has perfect PSRR. The UTC PA4894 can be configured externally with resistors to provide a controlled gain and with bypass capacitor to provide a controlled turn-on time for more flexibility ...
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... PA4894 PIN CONFIGURATION PIN DESCRIPTION PIN NO. PIN NAME TYPE 1 SD SELECT 2 INM 3 SD MODE 4 INP 5 BYPASS 6 OUTB OUTA Note: The SD SELECT pin must be toggled to the same state as the SD MODE pin to force the device in shutdown mode. UNISONIC TECHNOLOGIES CO., LTD www ...
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... PA4894 BLOCK DIAGRAM INM 2 BYPASS SELECT SD MODE 3 4 INP UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com. SHUTDOWN CONTROL CMOS IC 10 OUTA 6 OUTB QW-R502-379.A ...
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... PA4894 ABSOLUTE MAXIMUM RATING PARAMETER Supply Voltage Operating Supply Voltage Input Voltage Max Output Current Power Dissipation (Note 2) Junction Temperature Operating Temperature ( Storage Temperature Range Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ...
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... PA4894 TYPICAL APPLICATION CIRCUIT Differential Input Negative Diff Input from DAC 390nF SHUTDOWN CONTROL SD MODE SD SELECT 0 0 SHUTDOWN SHUTDOWN Positive Diff Input from DAC 390nF Driving Headphone UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com. 20kΩ INM 20kΩ ...
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... PA4894 APPLICATION INFORMATION Detailed Description The UTC PA4894 includes two power amplifiers internally. Two of them provide a controlled gain with external components R and R ; the gain is calculated by the ratios of the resistors. The load is driven differentially through IN F OUTA and OUTB outputs. This configuration is saving the use of an output coupling capacitor. ...
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... When the temperature of the UTC PA4894 is higher than160°C for any reasons, the thermal overload protection function turns the amplifiers off until the temperature drop below 140°C. The UTC PA4894 is unity gain stable and requires no external components besides gain setting resistors, an input coupling capacitor and a proper bypassing capacitor in the typical application. Both internal amplifiers are ...
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... PA4894 APPLICATION INFORMATION(Cont.) Demo Board Schematic VP J2 GND C2 R2 20kΩ 1µ 1µF J4 100kΩ 20kΩ 1µF J7 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw R4 20kΩ 1µF VP INM OUTA BYPASS SD SELECT SHUTDOWN CONTROL SD MODE OUTB INP VM 20kΩ ...
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... PA4894 TYPICAL CHARACTERISTICS THD+N vs. Output Power =8Ω L F=1kHz 1 0.1 0.01 0.001 0 200 400 600 800 1000 1200 Output Power (mW) THD+N vs. Output Power 2000 R =8Ω L 1800 F=1kHz 1600 1400 THD+N =10% 1200 1000 800 600 THD+N =1% 400 200 2.5 3.0 3.5 4.0 4.5 Output Power (mW) UNISONIC TECHNOLOGIES CO ...
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... PA4894 TYPICAL CHARACTERISTICS(Cont.) Power DissipationOutput Power 0.25 0.2 0.15 0.1 0.05 THD+N<0. 0.1 0.2 Output Power, P OUT Turning-on Sequence UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0.4 0.35 0.3 0.25 0.2 0.15 V =3V P 0.1 R =8Ω L F=1KHz 0.05 0 0.3 0.4 (W) CMOS IC Power DissipationOutput Power R =4Ω =8Ω =2.6V P F=1KHz THD+N<0.1% 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 Output Power, P (W) OUT Turning-on Sequence Zoom ...
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... PA4894 TYPICAL CHARACTERISTICS(Cont.) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury ...