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TS489IST bảng dữ liệu(PDF) 1 Page - STMicroelectronics |
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1 / 32 page September 2006 Rev 4 1/32 32 TS488-TS489 Pop-free 120mW stereo headphone amplifier Features ■ Pop and click noise protection circuitry ■ Operating range from VCC = 2.2V to 5.5V ■ Standby mode active low (TS488) or high (TS489) ■ Output power: – 120mW @5V, into 16 Ω with 0.1% THD+N max (1kHz) – 55mW @3.3V, into 16 Ω with 0.1% THD+N max (1kHz) ■ Low current consumption: 2.7mA max @5V ■ Ultra low standby current consumption: 10nA typical ■ High signal-to-noise ratio ■ High crosstalk immunity: 102dB (F = 1kHz) ■ PSRR: 70dB typ. (F = 1kHz), inputs grounded @5V ■ Unity-gain stable ■ Short-circuit protection circuitry ■ Available in lead-free MiniSO-8 & DFN8 2mm x 2mm Description The TS488/9 is an enhancement of TS486/7 that eliminates pop and click noise and reduces the number of external passive components. The TS488/9 is a dual audio power amplifier capable of driving, in single-ended mode, either a 16 Ω or a 32Ω stereo headset. Capable of descending to low voltages, it delivers up to 31mW per channel (into 16 Ω loads) of continuous average power with 0.1% THD+N in the audio bandwidth from a 2.5V power supply. An externally-controlled standby mode reduces the supply current to 10nA (typ.). The unity gain stable TS488/9 is configured by external gain- setting resistors. Applications ■ Headphone amplifier ■ Mobile phone, PDA, computer motherboard ■ High-end TV, portable audio player TS488IST - MiniSO-8 OUT (1) 4 3 2 1 BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 5 6 7 8 OUT (1) 4 3 2 1 BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 5 6 7 8 OUT (1) 4 3 2 1 BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 5 6 7 8 OUT (1) 4 3 2 1 BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 5 6 7 8 OUT (1) 4 3 2 1 BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 5 6 7 8 TS488IQT - DFN8 TS489IQT - DFN8 TS489IST - MiniSO-8 8 Bypass GND Shutdown Vcc OUT (2) OUT (1) 7 6 5 1 2 3 4 VIN (2) VIN (1) 8 Bypass GND Shutdown Vcc OUT (2) OUT (1) 7 6 5 1 2 3 4 VIN (2) VIN (1) 8 8 Bypass GND Shutdown Vcc OUT (2) OUT (1) 7 7 6 6 5 5 1 1 2 2 3 3 4 4 VIN (2) VIN (1) 8 Bypass GND Shutdown Vcc OUT (2) OUT (1) 7 6 5 1 2 3 4 VIN (2) VIN (1) 8 8 Bypass GND Shutdown Vcc OUT (2) OUT (1) 7 7 6 6 5 5 1 1 2 2 3 3 4 4 VIN (2) VIN (1) www.st.com |
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