MAX9770ETI+ Maxim Integrated Products, MAX9770ETI+ Datasheet - Page 7

• Manufacturer Part Number: MAX9770ETI+
• Description: IC AMP AUDIO 1.2W MONO D 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: Class Dr

Specifications of MAX9770ETI+

• Output Type: 1-Channel (Mono) with Stereo Headphones
• Max Output Power X Channels @ Load: 1.2W x 1 @ 8 Ohm; 80mW x 2 @ 16 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Depop, Input Multiplexer, Mute, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
noted.)
0.001
0.01
0.1
DD
10
1.2W, Low-EMI, Filterless, Mono Class D Amplifier
1
TOTAL HARMONIC DISTORTION PLUS NOISE
= 3.3V, BW = 22Hz to 22kHz, GAIN1 = 1, GAIN2 = 0, spread-spectrum mode, headphone outputs in phase, unless otherwise
10
vs. FREQUENCY (HEADPHONE MODE)
V
R
DD
L
= 32Ω
= 5V
with Stereo DirectDrive Headphone Amplifiers
100
P
OUT
FREQUENCY (Hz)
= 10mW
_______________________________________________________________________________________
P
1k
MONO
OUT
-10
-20
-30
-40
-50
-60
IN1_
40
30
20
10
IN2_
OUT
0
= 50mW
1M
MIXER OUTPUT (SPEAKER MODE)
10k
WIDEBAND OUTPUT SPECTRUM
(SPEAKER MODE)
10M
100k
FREQUENCY (Hz)
400μs/div
0.001
0.01
0.1
10
Typical Operating Characteristics (continued)
1
SSM MODE
RBW = 10kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
100M
10
MAX9770 toc21
vs. FREQUENCY (HEADPHONE MODE)
R
L
= 16Ω
P
OUT
100
10kHz
1V/div
4kHz
1V/div
1kHz
2V/div
1V/div
= 10mW
FREQUENCY (Hz)
P
1k
OUT
= 35mW
10k
0.001
0.01
0.1
10
1
TOTAL HARMONIC DISTORTION PLUS NOISE
10
vs. FREQUENCY (HEADPHONE MODE)
100k
V
R
R
f = 1kHz
DD
L
L
= 16Ω
= 8Ω
= 5V
STARTUP WAVEFORM
P
100
OUT
(SPEAKER MODE)
P
0.001
0.01
= 10mW
OUT
FREQUENCY (Hz)
0.1
10
1
4ms/div
= 50mW
TOTAL HARMONIC DISTORTION PLUS NOISE
10
1k
vs. FREQUENCY (HEADPHONE MODE)
R
L
= 32Ω
P
OUT
100
10k
= 10mW
MAX9770 toc20
FREQUENCY (Hz)
P
OUT
100k
1k
= 50mW
SHDN
2V/div
OUT+ - OUT-
500mV/div
10k
100k
7