MAX9790AETJ+ Maxim Integrated Products, MAX9790AETJ+ Datasheet - Page 7
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MAX9790AETJ+
Manufacturer Part Number
MAX9790AETJ+
Description
IC AMP AUDIO 2W STER AB 32TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Specifications of MAX9790AETJ+
Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2W x 2 @ 4 Ohm; 100mW x 2 @ 16 Ohm
Voltage - Supply
4.5 V ~ 5.5 V
Features
Depop, Mute, Short-Circuit and Thermal Protection, Shutdown
Mounting Type
Surface Mount
Package / Case
32-TQFN Exposed Pad
For Use With
MAX9789AEVKIT+ - EVALUATION KIT FOR MAX9789A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Windows Vista-Compliant, Stereo Class AB Speaker
(V
∞, unless otherwise specified, GAIN1 = 0, GAIN2 = 1 (A
unless otherwise noted. Headphone mode: SPKR_EN = 1, HP_EN = 0. Speaker mode: SPKR_EN = 0, HP_EN = 1.)
0.001
DD
-100
0.01
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.1
10
1
0
TOTAL HARMONIC DISTORTION PLUS NOISE
= PV
10
0
Amplifiers and DirectDrive Headphone Amplifiers
vs. OUTPUT POWER (SPEAKER MODE)
R
LEFT TO RIGHT
vs. FREQUENCY (SPEAKER MODE)
L
f
IN
f
DD
= 3Ω
IN
= 20Hz
0.5
= 10kHz
= CPV
100
1.50
1.25
1.00
0.75
0.50
0.25
OUTPUT POWER (W)
RIGHT TO LEFT
0
1.0
FREQUENCY (Hz)
CROSSTALK
0
vs. OUTPUT POWER (SPEAKER MODE)
DD
f
IN
POWER DISSIPATION PER CHANNEL
_______________________________________________________________________________________
= 1kHz
1.5
1k
= HPV
OUTPUT POWER PER CHANNEL (W)
0.5
FS = 0.707V
V
R
2.0
OUT
L
= 8Ω
DD
10k
= -20dB FS
R
f
L
IN
= LDO_EN = +5V, V
2.5
= 8Ω
= 1kHz
1.0
RMS
100k
3.0
R
L
= 4Ω
1.5
0.001
-100
-110
-120
-130
-140
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.01
0.1
Typical Operating Characteristics (continued)
10
0
1
TOTAL HARMONIC DISTORTION PLUS NOISE
0
2.0
0
vs. OUTPUT POWER (SPEAKER MODE)
GND
R
L
VSP
f
= 4Ω
IN
SPEAKER OUTPUT SPECTRUM
f
IN
= 20Hz
= V
= 10kHz
0.5
= 10dB, A
5k
PGND
OUTPUT POWER (W)
FREQUENCY (Hz)
1.0
= V
10k
VHP
CPGND
1.5
FS = 0.707V
V
R
OUT
L
= 3.5dB), measurement BW = 20kHz AES17, T
= 8Ω
15k
= -60dB FS
2.0
= V
f
100
IN
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
= 1kHz
RMS
LDO_SET
10
V
OUTPUT REFERRED
20k
POWER-SUPPLY REJECTION RATIO
RIPPLE
2.5
= 200mV
100
= 0V, C1 = C2 = C
(SPEAKER MODE)
0.001
0.01
FREQUENCY (Hz)
0.1
10
3.5
3.0
2.5
2.0
1.5
1.0
0.5
P-P
1
0
TOTAL HARMONIC DISTORTION PLUS NOISE
0
1
vs. OUTPUT POWER (SPEAKER MODE)
OUTPUT POWER vs. LOAD RESISTANCE
1k
R
L
f
IN
= 8Ω
= 10kHz
THD+N = 1%
10k
OUTPUT POWER (W)
(SPEAKER MODE)
0.5
BIAS
f
IN
= 20Hz
R
L
= C
10
THD+N = 10%
100k
(Ω)
f
IN
IN
= 1kHz
1.0
= 1µF. R
A
= +25°C,
f
IN
= 1kHz
L
=
1.5
100
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