VESTEL MB120 DS, Руководство по обслуживанию

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Table 5: Recommended Operating Conditions
B. HEADPHONE AMPLIFIER (U59)
Description
The AD22657B is a 2-Vrms cap-less stereo line driver. The device is ideal for single supply electronics.
Cap-less design can eliminate output dc-blocking capacitors for better low frequency response and save cost.
The AD22657B is capable of delivering 2-Vrms output into a 10k ohm load with 3.3V supply. The gain
settings can be set by users from 1V/V to 10V/V externally. The AD22657B has under voltage protection to
prevent POP noise. Build-in shutdown control and de-pop control sequence also help AD22657B to be a pop-
less device.
The AD22657B is available in a 10-pin MSOP package.
Features
•
Operation Voltage: 3V to 3.6V
•
Cap-less Output
−
Eliminates Output Capacitors
−
Improves Low Frequency Response
−
Reduces POP/Clicks
•
Low Noise and THD
−
Typical SNR 107dB
−
Typical Vn 7uVrms
−
Typical THD+N < 0.02%
•
Maximum Output Voltage Swing into 2.5k Load
−
2Vrms at 3.3V Supply Voltage
•
Single-ended Input
•
External Gain Setting from 1V/V to 10V/V
•
Fast Start-up Time: 0.5ms
•
Integrated De-Pop Control
•
External Under Voltage Protection
•
Thermal Protection
•
Less External Components Required
•
+/-8kV IEC ESD Protection at line outputs