max9746 Maxim Integrated Products, Inc., max9746 Datasheet - Page 3

• Manufacturer Part Number: max9746
• Description: Max9746 1.2w, Low-emi, Filterless, Class D Audio Amplifier
• Manufacturer: Maxim Integrated Products, Inc.

ELECTRICAL CHARACTERISTICS (continued)
(V
T
ELECTRICAL CHARACTERISTICS
(V
to T
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
Note 3: PSRR is specified with the amplifier inputs connected to GND through C
SYNC Frequency Lock Range
Efficiency
DIGITAL INPUTS (SHDN, SYNC)
SHDN Input Threshold
SHDN Input Leakage Current
SYNC Input Threshold
SYNC Input Current
Quiescent Current
Shutdown Current
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output Power
Total Harmonic Distortion
Plus Noise
Signal-to-Noise Ratio
MIN
DD
DD
MAX
to T
= PV
= PV
, unless otherwise noted. Typical values are at T
MAX
PARAMETER
PARAMETER
DD
DD
, unless otherwise noted. Typical values are at T
= SHDN = 5V, GND = PGND = 0V, SYNC = GND (FFM), R
= SHDN = 3.3V, GND = PGND = 0V, SYNC = GND (FFM), R
_______________________________________________________________________________________
SYMBOL
SYMBOL
THD+N
CMRR
I
PSRR
P
SHDN
SNR
I
OUT
DD
η
P
V
V
External clock
Internal clock
f = 1kHz, input referred
200mV
THD+N = 1%
f = 1kHz, either
FFM or SSM
V
3V
OUT
IH
IL
OUT
RMS
= 500mW, f
=
A
P-P
= +25°C.) (Notes 1, 2)
ripple
A
1.2W, Low-EMI, Filterless,
BW = 22Hz to
22kHz
A-weighted
= +25°C.) (Notes 1, 2)
CONDITIONS
CONDITIONS
IN
Class D Audio Amplifier
f = 217Hz
f = 20kHz
R
R
V
V
SSM mode
FFM mode (1.1MHz)
FFM mode (1.45MHz)
= 1kHz
L
L
IH
IL
= 8Ω
= 8Ω, P
L
= 8Ω, R
L
OUT
= 8Ω, R
FFM
SSM
FFM
SSM
IN
.
L
= 125mW
connected between OUT+ and OUT-, T
L
connected between OUT+ and OUT-, T
MIN
MIN
800
1.4
1.4
1.9
Tie to
Tie to
GND
1200
Float
TYP
TYP
92.5
90.5
95.5
93.5
V
5.2
0.1
0.1
94
72
72
55
DD
L
MAX
2000
MAX
= 8Ω, L = 68µH.
0.4
0.4
0.4
±1
±5
A
UNITS
UNITS
kHz
= T
mW
mA
µA
µA
µA
dB
dB
dB
%
%
V
V
A
MIN
3
=