Rainbow Electronics MAX9820 - Manual (Page 3)

MAX9820
DirectDrive Headphone Amplifier
with External Gain
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V DD = 2.7V to 5.5V, T A = +25°C (Note 3) 75 90
f = 1kHz, 200mV P-P (Note 3) 73 Power-Supply Rejection Ratio PSRR
f = 20kHz, 200mV P-P (Note 3) 55
dB
V
DD
= 3.6V 45 Z LOAD = 32 Ω + 1µH, f = 1kHz,
THD+N = 1% V DD = 5.0V 95
V DD = 3.6V 32
Output Power P OUT
Z
LOAD
= 16 Ω + 1µH, f = 1kHz,
THD+N = 1% V DD = 5.0V 75
mW
Z LOAD = 16 Ω + 1µH, f = 1kHz, P
OUT = 20mW 0.014
Z LOAD = 32 Ω + 1µH, f = 1kHz, P
OUT = 20mW 0.005
Total Harmonic Distortion
Plus Noise
THD+N
Z LOAD = 10k Ω, f = 1kHz, V
OUT = 1V RMS 0.001
%
Signal-to-Noise Ratio SNR Z LOAD = 32 Ω + 1µH, P
OUT = 25mW, A-weighted 105 dB
Output Noise V NOISE A-weighted (Note 3) 9 µV
Z LOAD = 32 Ω + 1µH
FS = 0.300V RMS ,
V OUT = 30mV RMS
73
Crosstalk
L to R, R to L,
BW = 20Hz to 15kHz
Z LOAD = 10k Ω
FS = 0.707V RMS ,
V OUT = 70.7mV RMS
73
dB
Capacitive Load Drive C L No sustained oscillations 200 pF
Oscillator Frequency f OSC T A = +25°C 300 500 800 kHz
Thermal Shutdown 145 °C
Thermal Shutdown Hysteresis 15 °C
DIGITAL INPUT ( SHDN)
Input Voltage High V INH 1.2 V
Input Voltage Low V INL 0.3 V
Input Leakage Current I LEAKAGE T A = +25°C ±1 µA
ELECTRICAL CHARACTERISTICS (continued)
(V DD = V SHDN = 5V, V GND = 0V, R IN = R FB = 40.2k
Ω (gain = -1V/V), C1 = C2 = 1µF, C3 = 10µF, R
LOAD = ∞, T
A = -40°C to +85°C,
unless otherwise noted. Typical values are at T A = +25°C, unless otherwise noted.) (Note 2)
Note 2: All specifications are 100% tested at T A = +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.