A22H165 Datasheet, PDF (1/36 Pages) STMicroelectronics – High-performance class-G stereo headphone amplifier

A22H165
High-performance class-G stereo headphone amplifier
Datasheet - production data
A22H165 - Flip-chip
 Thermal shutdown
 Flip-chip package: 1.65 mm x 1.65 mm,
400 µm pitch, 16 bumps
Applications
Pinout (top view)
TOP VIEW
INR- VOUTR
GAIN
EN
D
INR+
CMS
PVSS
C2 C
INL+ HPVDD
C1
AGND B
INL-
VOUTL AVDD
SW _A
4
3
2
1
Balls are undemeath
Features
 Power supply range: 2.3 V to 4.8 V
 0.6 mA/channel quiescent current
 2.1 mA current consumption with
100 µW/channel (10 dB crest factor)
 0.006% typical THD+N at 1 kHz
 100 dB typical PSRR at 217 Hz
 100 dB of SNR A-weighted at G = 0 dB
 Zero "pop and click"
 Gain settings: 0 dB and 6 dB
 Integrated high efficiency step-down converter
 Low standby current: 5 µA max
 Output-coupling capacitors removed
 Cellular / smart phones
 Portable media player
 Wearable
 Fitness and healthcare
Description
The A22H165 is a class-G stereo headphone
driver dedicated to high-performance audio, high
power efficiency and space-constrained
applications. It is based on the core technology of
a low power dissipation amplifier combined with a
high efficiency step-down DC-DC converter for
supplying this amplifier. When powered by a
battery, the internal step down DC-DC converter
generates the appropriate voltage to the amplifier
depending on the amplitude of the audio signal to
supply the headsets. It achieves a total 2.1 mA
current consumption at 100 µW output power (10
dB crest factor). THD+N is 0.02 % maximum at 1
kHz and PSRR is 100 dB at 217 Hz, which
ensures a high audio quality of the device in a
wide range of environments. The traditionally
bulky output coupling capacitors can be removed.
A dedicated common-mode sense pin removes
parasitic ground noise. The A22H165 is designed
to be used with an output serial resistor. It
ensures unconditional stability over a wide range
of capacitive loads. The A22H165 is packaged in
a tiny 16-bump flip-chip package with a pitch of
400 µm.
Order code
A22H165
Table 1. Device summary
Temperature range
Package
-40°C to +85°C
Flip-chip
Packing
Tape & reel
Marking
21
March 2014
This is information on a product in full production.
DocID026036 Rev 1
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