Electrical characteristics (continued), Electrical characteristics – Rainbow Electronics MAX9700 User Manual
Page 3
MAX9700
1.2W, Low-EMI, Filterless,
Class D Audio Amplifier
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= PV
DD
= SHDN = 3.3V, GND = PGND = 0V, SYNC = GND (FFM), R
L
= 8
Ω, R
L
connected between OUT+ and OUT-
(MAX9700B), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
Note 1: All devices are 100% production tested at +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
= 6
Ω, L = 47µH.
For R
L
= 8
Ω, L = 68µH. For R
L
= 16
Ω, L = 136µH.
Note 3: PSRR is specified with the amplifier inputs connected to GND through C
IN
.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FFM
89
BW = 22Hz
to 22kHz
SSM
87
FFM
92
Signal-to-Noise Ratio
SNR
V
OUT
= 2V
RMS
A-weighted
SSM
90
dB
SYNC = GND
980
1100
1220
SYNC = float
1280
1450
1620
Oscillator Frequency
f
OSC
SYNC = V
DD
(SSM mode)
1220
±120
kHz
SYNC Frequency Lock Range
800
2000
kHz
Efficiency
η
P
OUT
= 500mW, f
IN
= 1kHz
94
%
DIGITAL INPUTS (
SHDN, SYNC)
V
IH
2
Input Thresholds
V
IL
0.8
V
SHDN Input Leakage Current
±1
µA
SYNC Input Current
±5
µA
ELECTRICAL CHARACTERISTICS
(V
DD
= PV
DD
= SHDN = 5V, GND = PGND = 0V, SYNC = GND (FFM), R
L
= 8
Ω, R
L
connected between OUT+ and OUT-
(MAX9700B), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Quiescent Current
I
DD
5.2
mA
Shutdown Current
I
SHDN
0.1
µA
Common-Mode Rejection Ratio
CMRR
f = 1kHz, input referred
72
dB
f = 217Hz
72
Power-Supply Rejection Ratio
PSRR
200mV
P-P
ripple
f = 20kHz
55
dB
R
L
= 16
Ω
700
R
L
= 8
Ω
1200
Output Power
P
OUT
THD+N = 1%
R
L
= 6
Ω
1600
mW
R
L
= 8
Ω, P
OUT
= 125mW
0.015
Total Harmonic Distortion
Plus Noise
THD+N
f = 1kHz, either
FFM or SSM
R
L
= 4
Ω, P
OUT
= 125mW
0.02
%
FFM
92.5
BW = 22Hz to
22kHz
SSM
90.5
FFM
95.5
Signal-to-Noise Ratio
SNR
V
OUT
=
3V
RMS
A-weighted
SSM
93.5
dB