Datasheet
MAX9722A/MAX9722B
5V, Differential Input, DirectDrive, 130mW
Stereo Headphone Amplifiers with Shutdown
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(PV
DD
= SV
DD
= +5V, PGND = SGND = 0V, SHDN = SV
DD
, C1 = C2 = 1µF, R
L
= ∞, resistive load referenced to ground, for
MAX9722A gain = -1V/V (R
IN
= R
F
= 10kΩ), for MAX9722B gain = -2V/V (internally set), T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
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.
PGND to SGND .....................................................-0.3V to +0.3V
PV
DD
and SV
DD
to PGND or SGND .........................-0.3V to +6V
PV
SS
and SV
SS
to PGND..........................................+0.3V to -6V
IN_ to SGND ................................(SV
SS
- 0.3V) to (SV
DD
+ 0.3V)
OUT_ to PGND ......................................................-3.0V to +3.0V
SHDN to SGND..........................(SGND - 0.3V) to (SV
DD
+ 0.3V)
C1P to PGND ...........................................-0.3V to (PV
DD
+ 0.3V)
C1N to PGND............................................(SV
SS
- 0.3V) to +0.3V
PV
DD
to SV
DD
...........................................................................0V
PV
SS
to SV
SS
............................................................................0V
Output Short Circuit to GND.......................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
16-Pin Thin QFN (derate 14.7mW/°C above +70°C)....1176mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C) .........755mW
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
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL
Supply Voltage Range V
DD
Guaranteed by PSRR test
2.4 5.5
V
Quiescent Supply Current I
DD
R
L
= ∞
5.5
13
mA
Shutdown Supply Current I
SHDN
SHDN = SGND
0.1
2µA
SHDN Input Logic High V
IH
2V
SHDN Input Logic Low V
IL
0.8
V
SHDN Input Leakage Current -1
+0.05
+1 µA
SHDN to Full Operation Time t
SON
80 µs
AMPLIFIERS
Voltage Gain A
V
MAX9722B (Note 2)
-1.98
-2
-2.02
V/V
Gain Matching MAX9722B, between the right and left channels ±2%
Between IN_+ and IN_-, AC-coupled (MAX9722A) ±0.5 ±2.5
Input Offset Voltage V
IS
Between IN_+ and IN_-, AC-coupled (MAX9722B) ±1.5
±5
mV
Input Bias Current I
BIAS
IN_+ and IN_- 50 nA
Input Impedance R
IN
MAX9722B, measured at IN_ 10
14.4
20 kΩ
Input Common-Mode Voltage
Range
V
CM
-0.5 +0.7
V
Common-Mode Rejection Ratio
CMRR
Input referred, MAX9722A, T
A
= +25°C
-60 -70
dB
DC, V
DD
= 2.4V to 5.5V, input referred
-80 -90
f = 217Hz, 100mV
P-P
ripple, input referred
-80
Power-Supply Rejection Ratio
(Note 3)
PSRR
f = 10kHz, 100mV
P-P
ripple, input referred
-50
dB
R
L
= 16Ω, THD+N = 1%, T
A
= +25°C 60 70
Output Power P
OUT
R
L
= 32Ω, THD+N = 1%, T
A
= +25°C
130
mW
Output Voltage V
OUT
R
L
= 1kΩ 2
V
RMS
Output Impedance in Shutdown
10 kΩ