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| MAX9820 Datasheet, PDF (3/13 Pages) Maxim Integrated Products – DirectDrive Headphone Amplifier with External Gain | |||
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DirectDrive Headphone Amplifier
with External Gain
ELECTRICAL CHARACTERISTICS (continued)
(VDD = VSHDN = 5V, VGND = 0V, RIN = RFB = 40.2k⦠(gain = -1V/V), C1 = C2 = 1µF, C3 = 10µF, RLOAD = â, TA = -40°C to +85°C,
unless otherwise noted. Typical values are at TA = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Power-Supply Rejection Ratio
Output Power
Total Harmonic Distortion
Plus Noise
Signal-to-Noise Ratio
Output Noise
SYMBOL
CONDITIONS
VDD = 2.7V to 5.5V, TA = +25°C (Note 3)
PSRR f = 1kHz, 200mVP-P (Note 3)
f = 20kHz, 200mVP-P (Note 3)
POUT
ZLOAD= 32⦠+ 1µH, f = 1kHz,
THD+N = 1%
ZLOAD= 16⦠+ 1µH, f = 1kHz,
THD+N = 1%
VDD = 3.6V
VDD = 5.0V
VDD = 3.6V
VDD = 5.0V
ZLOAD = 16⦠+ 1µH, f = 1kHz, POUT = 20mW
THD+N ZLOAD = 32⦠+ 1µH, f = 1kHz, POUT = 20mW
ZLOAD = 10kâ¦, f = 1kHz, VOUT = 1VRMS
SNR ZLOAD = 32⦠+ 1µH, POUT = 25mW, A-weighted
VNOISE A-weighted (Note 3)
MIN TYP MAX UNITS
75
90
73
dB
55
45
95
mW
32
75
0.014
0.005
%
0.001
105
dB
9
µV
Crosstalk
ZLOAD = 32⦠+ 1µH
FS = 0.300VRMS,
73
L to R, R to L,
BW = 20Hz to 15kHz
VOUT = 30mVRMS
ZLOAD = 10kâ¦
dB
FS = 0.707VRMS,
73
VOUT = 70.7mVRMS
Capacitive Load Drive
Oscillator Frequency
Thermal Shutdown
Thermal Shutdown Hysteresis
DIGITAL INPUT (SHDN)
Input Voltage High
Input Voltage Low
Input Leakage Current
CL
fOSC
No sustained oscillations
TA = +25°C
VINH
VINL
ILEAKAGE
TA = +25°C
200
pF
300 500 800 kHz
145
°C
15
°C
1.2
V
0.3
V
±1
µA
Note 2: All specifications are 100% tested at TA = +25°C; temperature limits are guaranteed by design.
Note 3: The amplifier inputs are AC-coupled to GND.
Note 4: Mode transitions are controlled by SHDN.
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