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PDF BA3575FS Data sheet ( Hoja de datos )
| Número de pieza | BA3575FS | |
| Descripción | Low-current audio headphone driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Audio ICs
Low-current audio headphone driver
BA3575FS
The BA3575FS is a headphone driver with an AVC circuit that keeps the output below a fixed level. It features low current
consumption, and low output noise, and is ideal for use in portable digital audio equipment.
FApplications
Portable CD players
FFeatures
1) Low current consumption (when VCC = 2.4 V, the
quiescent current is 4.9mA).
2) Suitable for use in digital audio equipment (voltage
gain: GV = 11.8dB, output noise voltage: VNO =
–102dBm typ.).
3) ATT circuit (gain switch).
4) AVC (Auto Volume Control) circuit, for output limiting.
5) Internal standby switch.
6) Internal mute switch.
7) Internal ripple filter.
8) No output coupling capacitor required.
9) Internal beep circuit.
10) SSOP-A20 package.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
871
1 page  
Audio ICs
BA3575FS
875
5 Page 
Audio ICs
BA3575FS
FApplication notes
(1) “Pop” sound
By operating the BA3575FS according to the timing chart shown in Fig.3, it is possible to suppress generation of “pop”
noise in the headphone output.
(2) Application circuits
Provided the recommended circuit constants are used,
the application circuits should function correctly. Howev-
er, we recommend that you confirm the characteristics of
the circuits in actual use. If you change the circuit
constants, check both the static and transient character-
istics of the circuit, and allow sufficient margin to accom-
modate variations between both ICs and external com-
ponents.
In particular, the capacitors connected to the OUT 1,
OUT 2, and VREF pins must have low impedance at high
frequency, and have sufficient margin in their tempera-
ture characteristics.
Also, use an electrolytic or tantalum capacitor for the ca-
pacitor connected to the BIASOUT terminal.
(3) The PCB pattern for the external components
should be designed carefully to prevent oscillation and
degradation of the circuit characteristics. Keep the wiring
tracks as short as possible, and ensure that there is no
impedance between the common connections.
The ripple filter pins (1 and 2) and the bias amplifier pins
(3 and 4) cannot be used for external power supplies or
reference voltages.
881
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet BA3575FS.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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