SSM2932 Datasheet, PDF (1/16 Pages) Analog Devices – High Efficiency, Ground-Referenced

Data Sheet
High Efficiency, Ground-Referenced
Class-G Headphone Amplifier
SSM2932
FEATURES
GENERAL DESCRIPTION
Ground-referenced Class-G output stage
Very high efficiency for portable applications
1.7 mA typical quiescent current
50 mW per channel into 16 Ω load (with 3.3 V supply)
98 dB signal-to-noise ratio (SNR), A-weighted
90 dB power supply rejection ratio at 217 Hz
2.5 V to 3.6 V supply range
Selectable gain: 0 dB or 6 dB
High-Z output mode for sharing of output jack
1 μA shutdown current
Short-circuit protection
Pop-and-click reduction circuitry
8 kV ESD protection on output terminals
16-ball, 0.4 mm pitch WLCSP (1.64 mm × 1.64 mm)
−40°C to +85°C operating temperature range
APPLICATIONS
Cell phones
Smartphones/multimedia phones
Digital cameras
Portable media players
Phone accessories
PDAs
The SSM2932 is a stereo headphone amplifier capable of
delivering 50 mW of continuous output power per channel
into 16 Ω single-ended loads at the 1% THD + N threshold.
The stereo headphone drivers are high efficiency, true ground-
referenced Class-G technology.
The SSM2932 incorporates a gain control pin that selects a gain
of 0 dB or 6 dB. The ground-referenced output scheme eliminates
the need for large dc blocking capacitors, reducing system cost
and board area. The Class-G amplifier is fine-tuned to maximize
battery life, a critical task in portable applications. The device
maximizes battery life by modulating the amplifier power supply
rail to match the output demand without consuming excessive
supply current, thus reducing power dissipation during typical
audio playback.
The SSM2932 is specified over the industrial temperature range
of −40°C to +85°C. It has output short-circuit protection as well
as ESD protection to 8 kV (human body model). The SSM2932
is available in a 16-ball, 1.64 mm × 1.64 mm wafer level chip
scale package (WLCSP).
FUNCTIONAL BLOCK DIAGRAM
POR
GAIN
POWER
MANAGEMENT
PVDD
PGND
INL+
INL–
INR+
INR–
PGA
PGA
OUTR
SGND
OUTL
SSM2932
POP/ CURRENT
CLICK
LIMIT
Figure 1.
Rev. 0
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