MAX9722A/MAX9722B
5V, Differential Input, DirectDrive, 130mW
Stereo Headphone Amplifiers with Shutdown
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(PVDD = SVDD = +5V, PGND = SGND = 0V, SHDN = SVDD, C1 = C2 = 1F, RL =
∞, resistive load referenced to ground, for
MAX9722A gain = -1V/V (RIN = RF = 10k
Ω), for MAX9722B gain = -2V/V (internally set), TA = -40°C to +85°C, unless otherwise noted.
Typical values are at TA = +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
PVDD and SVDD to PGND or SGND .........................-0.3V to +6V
PVSS and SVSS to PGND..........................................+0.3V to -6V
IN_ to SGND ................................(SVSS - 0.3V) to (SVDD + 0.3V)
OUT_ to PGND ......................................................-3.0V to +3.0V
SHDN to SGND..........................(SGND - 0.3V) to (SVDD + 0.3V)
C1P to PGND ...........................................-0.3V to (PVDD + 0.3V)
C1N to PGND............................................(SVSS - 0.3V) to +0.3V
PVDD to SVDD...........................................................................0V
PVSS to SVSS ............................................................................0V
Output Short Circuit to GND.......................................Continuous
Continuous Power Dissipation (TA = +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
VDD
Guaranteed by PSRR test
2.4
5.5
V
Quiescent Supply Current
IDD
RL =
∞
5.5
13
mA
Shutdown Supply Current
ISHDN
SHDN = SGND
0.1
2A
SHDN Input Logic High
VIH
2V
SHDN Input Logic Low
VIL
0.8
V
SHDN Input Leakage Current
-1
+0.05
+1
A
SHDN to Full Operation Time
tSON
80
s
AMPLIFIERS
Voltage Gain
AV
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
VIS
Between IN_+ and IN_-, AC-coupled (MAX9722B)
±1.5
±5
mV
Input Bias Current
IBIAS
IN_+ and IN_-
50
nA
Input Impedance
RIN
MAX9722B, measured at IN_
10
14.4
20
k
Ω
Input Common-Mode Voltage
Range
VCM
-0.5
+0.7
V
Common-Mode Rejection Ratio
CMRR
Input referred, MAX9722A, TA = +25°C
-60
-70
dB
DC, VDD = 2.4V to 5.5V, input referred
-80
-90
f = 217Hz, 100mVP-P ripple, input referred
-80
Power-Supply Rejection Ratio
(Note 3)
PSRR
f = 10kHz, 100mVP-P ripple, input referred
-50
dB
RL = 16
Ω, THD+N = 1%, TA = +25°C
60
70
Output Power
POUT
RL = 32
Ω, THD+N = 1%, TA = +25°C
130
mW
Output Voltage
VOUT
RL = 1k
Ω
2
VRMS
Output Impedance in Shutdown
10
k
Ω