Dual Preamplifier. BA3304F Datasheet

BA3304F Preamplifier. Datasheet pdf. Equivalent

Part BA3304F
Description 3V Dual Preamplifier
Feature Audio ICs 3V dual preamplifier BA3304F The BA3304F is a monolithic, dual-preamplifier IC designed f.
Manufacture Rohm
Datasheet
Download BA3304F Datasheet



BA3304F
Audio ICs
3V dual preamplifier
BA3304F
The BA3304F is a monolithic, dual-preamplifier IC designed for 3V applications. It has been designed especially for low-
voltage operation.
The preamplifiers can be directly coupled to the head to minimize the “pop” noise at power on. When combined with the
Rohm BA5204, it is a simple matter to design a high-performance circuit for cassette players.
FApplications
3V headphone stereos, 3V micro-cassette players and
low-voltage stereo equipment
FFeatures
1) Low noise (VNIN = 1.2µVrms).
2) Input coupling capacitors not required.
3) No input coupling capacitors means high bass stabil-
ity.
4) Good channel balance.
5) Built-in bias circuit minimizes “pop” noise.
6) Emitter-follower output for low output impedance.
7) Good low voltage characteristics (operation possible
from Typ. 1.2V).
FBlock diagram
178



BA3304F
Audio ICs
FAbsolute maximum ratings (Ta = 25_C)
BA3304F
FInternal circuit configuration
FDescription of circuit (see Fig. 1)
As shown in the equivalent circuit for the BA3304 in Fig.
1, the first stage is a differential amplifier. This gives good
stability with respect to temperature and supply voltage
variation, and improves resistance to earth and power
supply noise.
The second stage uses Darlington pairs to increase the
input impedance and the gain of the first stage. The out-
put is an emitter follower which suppresses deterioration
of the linearity due to the influence of the equalizer termi-
nal, and prevents drop in maximum output.
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3V, f= 1kHz and RL = 10)
179





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)