MAX9789AETJ+ Maxim Integrated Products, MAX9789AETJ+ Datasheet - Page 10

• Manufacturer Part Number: MAX9789AETJ+
• Description: IC AMP AUDIO 2W STER AB 32TQFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class ABr

Specifications of MAX9789AETJ+

• 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
• Product: Class-AB
• Output Power: 2 W
• Thd Plus Noise: 0.004 %
• Supply Current: 0.1 mA
• Maximum Power Dissipation: 1990 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 4 Ohms
• Minimum Operating Temperature: - 40 C
• Amplifier Class: AB
• No. Of Channels: 3
• Supply Voltage Range: 4.5V To 5.5V
• Load Impedance: 4ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: TQFN
• Rohs Compliant: Yes
• 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.)
10
DD
______________________________________________________________________________________
= PV
DD
= CPV
DD
300
275
250
225
200
175
150
125
100
125
100
75
50
25
75
50
25
= HPV
0
0
POWER DISSIPATION vs. OUTPUT POWER
3.0
HEADPHONE OUTPUT POWER vs. HPV
0
THD+N = 1%
f
IN
MAX9789A/MAX9789C/MAX9790A
HEADPHONE STARTUP WAVEFORM
= 1kHz
DD
OUTPUT POWER PER CHANNEL (mW)
25
= LDO_EN = +5V, V
3.5
(HEADPHONE MODE)
50
R
HPV
20ms/div
L
R
= 16Ω
L
4.0
DD
= 32Ω
R
(V)
L
75
= 32Ω
R
L
Typical Operating Characteristics (continued)
= 16Ω
4.5
100
MAX9789 toc37
GND
VSP
DD
= V
125
5.0
= 10dB, A
HP_EN
5V/div
HP_
500mV/div
PGND
= V
VHP
CPGND
= 3.5dB), measurement BW = 20kHz AES17, T
-100
= V
125
100
-10
-20
-30
-40
-50
-60
-70
-80
-90
75
50
25
0
0
vs. OUTPUT POWER (HEADPHONE MODE)
LDO_SET
10
0
MAX9789B/MAX9790B
vs. FREQUENCY (HEADPHONE MODE)
HPV
POWER DISSIPATION PER CHANNEL
V
OUTPUT REFERRED
HEADPHONE STARTUP WAVEFORM
POWER-SUPPLY REJECTION RATIO
RIPPLE
DD
OUTPUT POWER PER CHANNEL (mW)
= 3V
= 200mV
100
20
= 0V, C1 = C2 = C
FREQUENCY (Hz)
P-P
20ms/div
40
1k
R
L
= 32Ω
R
L
10k
= 16Ω
60
BIAS
MAX9789 toc38
= C
100k
80
HP_EN
5V/div
HP_
500mV/div
IN
= 1µF. R
A
= +25°C,
L
=