MAX9790AETJ+ Maxim Integrated Products, MAX9790AETJ+ Datasheet - Page 12
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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
Amplifiers and DirectDrive Headphone Amplifiers
(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.)
12
DD
100
90
80
70
60
50
40
30
20
10
______________________________________________________________________________________
= PV
0
0
DD
DROPOUT VOLTAGE vs. I
25
= CPV
LINE-TRANSIENT RESPONSE
LDO SHUTDOWN RESPONSE
50
V
LDO_OUT
DD
I
LOAD
= HPV
75
200ms/div
(mA)
1ms/div
= 4.75V
V
LDO_OUT
100
DD
= LDO_EN = +5V, V
LOAD
125
= 3.3V
I
LOAD
MAX9789 toc48
MAX9789 toc50
= 0mA
150
V
1V/div
5.5V
4.5V
LDO_OUT
(AC-COUPLED)
20mV/div
LDO_EN
2V/div
V
2V/div
DD
LDO_OUT
-10
-20
-30
-40
-50
-60
-70
-80
-90
Typical Operating Characteristics (continued)
0
10
GND
RIPPLE REJECTION vs. FREQUENCY
VSP
V
= V
LDO_OUT
= 10dB, A
100
PGND
FREQUENCY (Hz)
= 4.75V
= V
V
1k
VHP
LDO_OUT
CPGND
V
I
OUTPUT REFERRED
OUT
RIPPLE
= 3.5dB), measurement BW = 20kHz AES17, T
= 10mA
= 3.3V
10k
= 200mV
= V
-100
-110
-120
-20
-30
-40
-50
-60
-70
-80
-90
LDO_SET
10
P-P
100k
LDO LOAD-TRANSIENT RESPONSE
LDO CROSSTALK vs. FREQUENCY
RIGHT SPEAKER TO LDO
LEFT SPEAKER TO LDO
= 0V, C1 = C2 = C
100
FREQUENCY (Hz)
0.01
0.1
10
1
20ms/div
10
1k
OUTPUT NOISE vs. FREQUENCY
V
P
R
I
OUT
LDO_OUT
OUT
L
= 4Ω
100
= 0mA
10k
= 2W
BIAS
MAX9789 toc49
FREQUENCY (Hz)
= 4.75V
= C
1k
100k
I
15mA/div
AC-COUPLED
V
10mV/div
IN
LDO_OUT
LDO_OUT
= 1µF. R
A
= +25°C,
10k
L
=
100k