Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX9768 User Manual
Page 6
MAX9768
10W Mono Class D Speaker
Amplifier with Volume Control
6
_______________________________________________________________________________________
Note 1: All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
L
= 8Ω, L = 68µH.
Note 3: Device muted by either asserting MUTE or minimum V
OL
setting.
Note 4: C
b
= total capacitance of one bus line in pF.
ELECTRICAL CHARACTERISTICS (continued)
(PV
DD
= 12V, V
DD
= 3.3V, GND = PGND = 0V, V
SHDN
= V
DD
, V
MUTE
= 0V; Max volume setting; speaker load resistor connected
between OUT+ and OUT-, R
L
=
∞, unless otherwise noted. C
BIAS
= 2.2µF, C1 = C2 = 0.1µF, C
IN
= 0.47µF, R
IN
= 20k
Ω, R
F
= 30kΩ,
SSM mode. Filterless modulation mode (see the
Functional Diagram/Typical Application Circuit). T
A
= T
MIN
to T
MAX
, unless otherwise
noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Fall Time of SDA,
Transmitting
t
F
(Note 4)
20 +
0.1Cb
250
ns
Pulse Width of Spike
Suppressed
t
SP
0
50
ns
Capacitive Load for Each
Bus Line
C
b
400
pF
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9768 toc01
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
1
10
0.01
10
100k
PV
DD
= 12V
R
L
= 8
Ω
FILTERLESS MODULATION
OUTPUT POWER = 6W
OUTPUT POWER = 2W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9768 toc02
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
1
10
0.01
10
100k
PV
DD
= 12V
R
L
= 8
Ω
PWM MODE
OUTPUT POWER = 5W
OUTPUT POWER = 2W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9768 toc03
FREQUENCY (Hz)
THD+N (%)
10k
1k
100
0.1
0.01
1
10
0.001
10
100k
PV
DD
= 5V
R
L
= 8
Ω
FILTERLESS MODULATION
OUTPUT POWER = 1W
OUTPUT POWER = 300mW
Typical Operating Characteristics
(PV
DD
= 12V, V
DD
= 3.3V = GND = PGND = 0V, V
MUTE
= 0V; 0dB volume setting; all speaker load resistors connected between
OUT+ and OUT-, R
L
= 8
Ω, unless otherwise noted. C
BIAS
= 2.2µF, C1 = C2 = 0.1µF, C
IN
= 0.47µF, R
IN
= 20kΩ, R
FB
= 30k
Ω,
spread-spectrum modulation mode.)