Typical operating characteristics, General – Rainbow Electronics MAX9877 User Manual
Page 7
MAX9877
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
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7
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9877 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
5
6
7
8
9
4
2.5
5.5
HEADPHONE ONLY
INPUTS AC-COUPLED TO GND
OUTMODE = 8
V
SDA
= V
SCL
= 3.3V
f
OSC
= 1176kHz SREAD-SPECTRUM MODE
f
OSC
= 1100kHz
f
OSC
= 700kHz
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9877 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
6
5
7
8
9
10
4
2.5
5.5
SPEAKER ONLY
INPUTS AC-COUPLED TO GND
OUTMODE = 7
V
SDA
= V
SCL
= 3.3V
f
OSC
= 1176kHz
SPREAD-SPECTRUM MODE
f
OSC
= 1100kHz
f
OSC
= 700kHz
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9877 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.0
4.5
4.0
3.5
3.0
10
9
8
11
12
13
7
2.5
5.5
f
OSC
= 1176kHz
SPREAD-SPECTRUM MODE
f
OSC
= 1100kHz
f
OSC
= 700kHz
HEADPHONE AND SPEAKER
INPUTS AC-COUPLED TO GND
OUTMODE = 9
V
SDA
= V
SCL
= 3.3V
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX9877 toc04
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (
μ
A)
5.0
4.5
4.0
3.5
3.0
10
9
8
11
12
13
14
7
2.5
5.5
INPUTS AC-COUPLED TO GND
V
SDA
= V
SCL
= 3.3V
VOLUME ATTENUATION
vs. _VOL CONTROL CODE
MAX9877 toc05
_VOL CONTROL CODE
VOLUME ATTENUATION (dB)
5
15
10
20
25
30
-60
-80
-100
-40
-20
0
20
-120
35
0
f
IN
= 1kHz
MEASURED AT HPL
AND HPR
Typical Operating Characteristics
(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.)
GENERAL