Datasheet

2.3W, Ultra-Low-EMI, Filterless,
Class D Audio Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= PV
DD
= V
SHDN
= 3.3V, V
GND
= V
PGND
= 0, SYNC = GND (FFM), R
L
= ∞, R
L
connected between OUT+ and OUT-,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
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.
V
DD
to GND..............................................................................6V
PV
DD
to PGND .........................................................................6V
GND to PGND .......................................................-0.3V to +0.3V
PV
DD
to V
DD
..........................................................-0.3V to +0.3V
All Other Pins to GND.................................-0.3V to (V
DD
+ 0.3V)
Continuous Current Into/Out of PV
DD
/PGND/OUT_........±600mA
Continuous Input Current (all other pins) .........................±20mA
Duration of OUT_ Short Circuit to GND or PV
DD
........Continuous
Duration of Short Circuit Between OUT+ and OUT-.....Continuous
Continuous Power Dissipation (T
A
= +70°C)
10-Pin TDFN (derate 24.4mW/°C above +70°C) .....1951.2mW
12-Bump UCSP (derate 6.1mW/°C above +70°C)........484mW
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
Bump Temperature (soldering)
Reflow ..........................................................................+235°C
MAX9705
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL
Supply Voltage Range V
DD
Inferred from PSRR test 2.5 5.5 V
Quiescent Current I
DD
5.4 7 mA
Shutdown Current I
SHDN
0.3 10 µA
Turn-On Time t
ON
30 ms
Input Resistance R
IN
T
A
= +25°C 12 20 kΩ
MAX9705A 0.88 1.0 1.12
MAX9705B 0.73 0.83 0.93
MAX9705C 0.61 0.71 0.81
Input Bias Voltage V
BIAS
Either input
MAX9705D 0.48 0.56 0.64
V
MAX9705A 1.9 2.0 2.1
MAX9705B 3.8 4.0 4.2
MAX9705C 5.7 6.0 6.3
Voltage Gain A
V
MAX9705D 9.5 10 10.5
V/V
Output Offset Voltage V
OS
T
A
= +25°C ±10 ±69 mV
Common-Mode Rejection Ratio CMRR f
IN
= 1kHz, input referred 56 dB
V
DD
= 2.5V to 5.5V, T
A
= +25°C 50 75
f
RIPPLE
= 217Hz 75
Power-Supply Rejection Ratio
(Note 3)
PSRR
200mV
P-P
ripple
f
RIPPLE
= 20kHz 60
dB
R
L
= 8Ω 600
Output Power P
OUT
THD+N = 1%,
f
IN
= 1kHz
R
L
= 4Ω
MAX9705_ETB+T and
MAX9705_EUB+ only
950
mW
R
L
= 8Ω,
P
OUT
= 450mW
0.02
Total Harmonic Distortion
Plus Noise
THD+N
f
IN
= 1kHz, either
FFM or SSM
R
L
= 4Ω,
P
OUT
= 375mW
0.025
%
Into shutdown -68
Click/Pop Level K
CP
Peak voltage,
A-weighted
(Notes 3, 4)
Out of shutdown -60.5
dB
Output Slew Rate SR 176 V/µs