MAX9726BETP+ Maxim Integrated Products, MAX9726BETP+ Datasheet - Page 7

• Manufacturer Part Number: MAX9726BETP+
• Description: IC AMP AUDIO .124W STER 20TQFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class ABr

Specifications of MAX9726BETP+

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 124mW x 2 @ 16 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Bass Boost, Depop, I²C, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 20-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
ume (overall gain = 0dB), BassMax disabled. Load connected between OUT_ and PGND where specified. Outputs in phase, both
channels loaded. T
DD
-100
-110
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
= SHDN = 5V, PGND = SGND = 0V, C1 = C2 = 1µF, C
10
POWER-SUPPLY REJECTION RATIO
100
-100
-100
-120
-140
-40
-50
-60
-70
-80
-90
-20
-40
-60
-80
vs. FREQUENCY
FREQUENCY (Hz)
0
A
10
_______________________________________________________________________________________
0
= +25°C, unless otherwise noted.) (See the Functional Diagram/Typical Operating Circuit )
V
R
G = -10dB
BassMax, I
IN
L
1k
= 32Ω
= 1V
V
R
CROSSTALK vs. FREQUENCY
DirectDrive, Headphone Amplifier with
DD
IN
P-P
= R
100
= 5V + 100mV
5
F
= 10kΩ
10k
FREQUENCY (kHz)
FREQUENCY (Hz)
OUTPUT FFT
1k
10
P-P
LEFT TO RIGHT
RIGHT TO LEFT
100k
V
ATTEN = 60dB
V
R
f
V
IN
IN
OUT
L
DD
= 320Ω
= 1kHz
= 100mV
= 5V
10k
= -60dBV
15
-100
-110
Typical Operating Characteristics (continued)
-10
-20
-30
-40
-50
-60
-70
-80
-90
RMS
0
10
100k
20
2
POWER-SUPPLY REJECTION RATIO
C, Volume and Gain Control
100
PREG
vs. FREQUENCY
FREQUENCY (Hz)
= C
1k
V
R
NREG
DD
IN
= R
= 3.3V + 100mV
F
= 10kΩ
= 1µF, BM_ = 0V, R
10k
160
150
140
130
120
110
100
40
35
30
25
20
15
10
90
80
70
60
10
P-P
1
CAPACITANCE AND LOAD RESISTANCE
100k
OUTPUT POWER vs. CHARGE-PUMP
BassMax FREQUENCY RESPONSE
15
BassMax DISABLED
C1 = C2 = 1μF
10
20
LOAD RESISTANCE (Ω)
-100
-110
-120
C1 = C2 = 2.2μF
-60
-70
-80
-90
FREQUENCY (Hz)
C1 = C2 = 0.68μF
25
IN
R2 = 36kΩ
C3 = 0.068μF
100
R2 = 22kΩ
C3 = 0.1μF
10
= 10kΩ, R
R2 = 10kΩ
C3 = 0.22μF
30
V
R
G = 0dB
IN
L
= 32Ω
= 1V
RIGHT TO LEFT
CROSSTALK vs. FREQUENCY
1k
35
LEFT TO RIGHT
P-P
100
V
THD+N = 1%
f
40
DD
IN
F
R1 = 47kΩ
R
FREQUENCY (Hz)
10k
= 1kHz
L
= 5V
= 10kΩ, maximum vol-
= 32Ω
45
1k
100k
50
10k
100k
7