Rainbow Electronics MAX9877 - Manual (Page 11)

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
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IN-BAND OUTPUT SPECTRUM
MAX9877 toc30
FREQUENCY (kHz)
AMPLITUDE (dBV)
15 10 5
0
-140
-80
-40
-120
-20
-60
-100
0 20
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 10 100 1
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 10 100 1
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 10 100 1
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