Owner's manual

MAX9877
Typical Operating Characteristics (continued)
(V
DD
= PV
DD
= 3.7V, V
GND
= V
PGND
= 0V. Single-ended inputs, preamp gain = 0dB, volume controls = 0dB, OSC = 00, BYPASS =
0, SHDN = 1. Speaker loads (Z
SPK
) connected between OUT+ and OUT-. Headphone loads (R
HP
) connected from HPL or HPR to
GND. Z
SPK
= ∞, R
HP
= ∞. C1 = C2 = C
BIAS
= 1µF. T
A
= +25°C, unless otherwise noted.)
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
______________________________________________________________________________________ 11
IN-BAND OUTPUT SPECTRUM
MAX9877 toc30
FREQUENCY (kHz)
AMPLITUDE (dBV)
15105
0
-140
-80
-40
-120
-20
-60
-100
020
f
OSC
= 1176kHz
f
IN
= 1kHz
WIDEBAND OUTPUT SPECTRUM
MAX9877 toc31
FREQUENCY (MHz)
AMPLITUDE (dBV)
0
-70
-40
-50
-20
-80
-60
-90
-30
-10
-100
0.1 10 1001
f
OSC
= 1100kHz
INPUTS AC-COUPLED TO GND
WIDEBAND OUTPUT SPECTRUM
MAX9877 toc32
FREQUENCY (MHz)
AMPLITUDE (dBV)
0
-70
-40
-50
-20
-80
-60
-90
-30
-10
-100
0.1 10 1001
f
OSC
= 700kHz
INPUTS AC-COUPLED TO GND
WIDEBAND OUTPUT SPECTRUM
MAX9877 toc33
FREQUENCY (MHz)
AMPLITUDE (dBV)
0
-70
-40
-50
-20
-80
-60
-90
-30
-10
-100
0.1 10 1001
f
OSC
= 1176kHz
INPUTS AC-COUPLED TO GND
HARDWARE SHUTDOWN RESPONSE
MAX9877 toc34
V
BIAS
500mV/div
20ms/div
OUT+ - OUT-
1V/div
SOFTWARE SHUTDOWN
ON- AND OFF-RESPONSE
MAX9877 toc35
V
SDA
2V/div
20ms/div
OUT+ - OUT-
1V/div