MAX9879
Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
ABSOLUTE MAXIMUM RATINGS
V
V
V
V
, PVDDL, PVDDR to GND ..................................-0.3V to +6V
, PVDDL to PVDDR .........................................-0.3V to +0.3V
to PVDDL .......................................................-0.3V to +0.3V
Continuous Current In/Out of HPR and HPL.....................140mA
Continuous Current In/Out of RXIN+ and RXIN-...............150mA
DD
DD
DD
Continuous Input Current V ...........................................100mA
SS
to GND...........................................................-0.3V to +4V
Continuous Input Current (All Other Pins) ........................ 20mA
Duration of OUT_ Short Circuit
CCIO
PGNDL, PGNDR, to GND......................................-0.3V to +0.3V
PGNDL to PGNDR.................................................-0.3V to +0.3V
to PGND_ or PVDD_...............................................Continuous
Duration of Short Circuit
V
SS
to GND...............................................................-6V to +0.3V
C1N to GND................................................(V - 0.3V) to +0.3V
C1P to GND...........................................-0.3V to (PVDD_ + 0.3V)
Between OUT_+ and OUT_- ..................................Continuous
Duration of HP_ Short Circuit to GND or PVDDL........Continuous
SS
HPL, HPR to V (Note 1).............................-0.3V to the lower of
Continuous Power Dissipation (T = +70°C)
5x6 UCSP Multilayer Board
SS
A
(V
- V + 0.3V) or +9V
DD
SS
HPL, HPR to V
(Note 2) .........................+0.3V to the higher of
(derate 16.5mW/°C above +70°C).............................1250mW
Junction Temperature......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DD
(V - PVDD_ - 0.3V) or -9V
SS
INA1, INA2, INB1, INB2, BIAS..................................-0.3V to +4V
SDA, SCL, SHDN......................................................-0.3V to +4V
All Other Pins to GND............................-0.3V to (PVDD_ + 0.3V)
Continuous Current In/Out of PVDD_, PGND_, OUT_ .... 800mA
Note 1: HPR and HPL should be limited to no more than 9V above V , or above PV + 0.3V, whichever limits first.
SS
DD
Note 2: HPR and HPL should be limited to no more than 9V below PV , or below V - 0.3V, whichever limits first.
DD
SS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
= V
= V
= 3.7V, V
= 1.8V, V
= V
= V
= 0. Single-ended inputs, preamp = 0, volume controls =
DD
PVDDL
PVDDR
CCIO
GND
PGNDL
PGNDR
0dB, BYPASS = 0, SHDN = 1. Speaker loads connected between OUT_+ and OUT_-. Headphone loads connected from HPL or HPR to
GND. R
(Notes 3, 4)
= ∞, R = ∞. C1 = C2 = C
= 1µF. T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
SPK
HP
BIAS
A
MIN
PARAMETER
SYMBOL
CONDITIONS
Guaranteed by PSRR Test
MIN
2.7
TYP
MAX
UNITS
V
,
DD
Analog Supply Voltage Range
Digital Supply Voltage Range
5.5
V
V
PVDDR
PVDDL
V
1.7
3.6
9.0
18
10
24
10
CCIO
HP mode, R = ∞
5.6
9.8
6.6
13.2
5
HP
Stereo SPK mode, R
= ∞
SPK
Quiescent Current
Shutdown Current
I
mA
µA
DD
Mono SPK mode, R
= ∞
SPK
Stereo SPK + HP mode, R = R
= ∞
HP
SPK
I
= I
+ I
PVDDR
;
CC
Software shutdown
SHDN
DD
+ I
I
+ I
T
SHDN
PVDDL
= +25°C
Hardware shutdown
0.1
10
1
A
Time from shutdown or power-on to full
operation
Turn-On Time
t
ms
ON
T
= +25°C, preamp = 0dB or +5.5dB
= +25°C, preamp = +20dB
Preamp = 0dB
11
3
21
5.5
31
8
A
A
Input Resistance
R
kΩ
IN
T
2.3
Headphone amplifier
path
Preamp = +5.5dB
Preamp = +20dB
Preamp = 0dB
1.2
0.23
1.2
Maximum Input Signal Swing
V
P-P
Speaker amplifier path
Preamp = +5.5dB
Preamp = +20dB
0.64
0.12
2
Maxim Integrated
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