MAX9770ETI+ Maxim Integrated Products, MAX9770ETI+ Datasheet - Page 9

• 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

-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
60
50
40
30
20
10
(V
noted.)
0
0
DD
10
20
1.2W, Low-EMI, Filterless, Mono Class D Amplifier
vs. FREQUENCY (HEADPHONE MODE)
V
V
R
POWER-SUPPLY REJECTION RATIO
R
vs. CHARGE-PUMP CAPACITANCE
DD
RIPPLE
L
= 3.3V, BW = 22Hz to 22kHz, GAIN1 = 1, GAIN2 = 0, spread-spectrum mode, headphone outputs in phase, unless otherwise
L
= 32Ω
= 32Ω
= 3.3V
C1 = C2 = 1μF
AND LOAD RESISTANCE
= 200mV
ENTERING SHUTDOWN
100
(HEADPHONE MODE)
LOAD RESISTANCE (Ω)
with Stereo DirectDrive Headphone Amplifiers
OUTPUT POWER
30
FREQUENCY (Hz)
P-P
2μs/div
1k
C1 = C2 = 0.47μF
_______________________________________________________________________________________
MAX9770
C
BIAS
40
= 0.047μF
10k
f = 1kHz
THD+N = 1%
MAX9770 toc41
100k
50
SHDN
2V/div
OUT_
10mV/div
-100
-120
-140
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
-20
-40
-60
-80
Typical Operating Characteristics (continued)
10
0
0
8
6
4
2
0
2.5
10
0
R
f = 1kHz
V
L
IN
= 32Ω
= 200mV
LEFT TO RIGHT
CROSSTALK vs. FREQUENCY
RIGHT TO LEFT
100
SPEAKER MODE
vs. SUPPLY VOLTAGE
(HEADPHONE MODE)
5
OUTPUT SPECTRUM
(HEADPHONE MODE)
SUPPLY CURRENT
SUPPLY VOLTAGE (V)
P-P
3.5
FREQUENCY (kHz)
FREQUENCY (Hz)
HEADPHONE MODE
10
1k
4.5
R
f = 1kHz
V
10k
L
IN
15
= 32Ω
= -60dBV
100k
20
5.5
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
0.5
0.4
0.3
0.2
0.1
0
0
2.5
10
SEL1 = 0
SEL2 = 1
IN1_ = GND
IN2_ = DRIVEN
V
R
IN
L
FEEDTHROUGH vs. FREQUENCY
SHUTDOWN SUPPLY CURRENT
= 32Ω
= 2V
HEADPHONE MODE
SPEAKER MODE
100
P-P
vs. SUPPLY VOLTAGE
(HEADPHONE MODE)
EXITING SHUTDOWN
SUPPLY VOLTAGE (V)
3.5
FREQUENCY (Hz)
2μs/div
1k
4.5
10k
MAX9770 toc40
100k
5.5
9
SHDN
2V/div
OUT_
10mV/div