BD88400FJ Datasheet, PDF (1/30 Pages) Rohm – No Bulky DC-Blocking Capacitors Required

Datasheet
80-mW Coupling Capacitorless
Stereo Headphone Amplifiers
BD88400FJ
General Description
BD88400FJ is an output coupling capacitorless
headphone amplifier. This IC has a built-in regulated
negative voltage generator type that generates the direct
regulated negative voltage from the supply voltage. It is
possible to drive headphones in a ground standard with
both voltage of the positive voltage (+2.4V) and the
negative voltage (-2.4V). Therefore a large capacitance
output coupling capacitor becomes needless and can
reduce cost, board area and height of the part.
In addition, there is no signal degradation at the low
range caused by the output coupling capacitor and
output load impedance, thus a rich low tone can be
outputted.
Features
„ No Bulky DC-Blocking Capacitors Required
„ No Degradation of Low-Frequency Response Due
to Output Capacitors
„ Ground-Referenced Outputs
„ Gain setting: Variable Gain with External Resistors
„ Low THD+N
„ Low Supply Current
„ Integrated Negative Power Supply
„ Integrated Short-Circuit and Thermal-Overload
Protection
Package
W(Typ) x D(Typ) x H(Max)
SOP-J14
8.65mm x 6.00mm x 1.65mm
Applications
Home Audio, TVs, Portable Audio Players, PCs, Digital
Cameras, Electronic Dictionaries, Voice Recorders,
Bluetooth Headsets, etc.
Key Specifications and Lineup
Supply Voltage [V]
Supply Current [mA]
Gain [V/V]
Maximum Output Power [mW]
THD+N [%]
Noise Voltage [µVrms]
PSRR [dB]
+2.4 to +5.5
2.0 (No Signal)
Variable Gain with External Resistor
80
(V_DD=3.3V,R_L=16Ω, THD+N≤1%,f=1kHz)
0.006
(V_DD=3.3V,R_L=16Ω,Po=10mW,f=1kHz)
10
-80
(f=217Hz)
○Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays
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TSZ02201-0C1C0EA00160-1-2
07.Aug.2014 Rev.002