Datasheet

MAX9850
Stereo Audio DAC with DirectDrive
Headphone Amplifier
______________________________________________________________________________________ 11
1.0
0.8
0.4
0.6
0.2
0
-0.2
-0.4
-0.8
-1.0
10 100 10k 100k
GAIN FLATNESS
vs. FREQUENCY
-0.6
MAX9850toc31
FREQUENCY (Hz)
GAIN (dB)
1k
R
LOAD
= 32Ω
DAC IN TO HP
DAC IN = 0dBFS
60
70
65
80
75
95
90
85
100
SNR vs. MCLK FREQUENCY
MAX9850toc32
MCLK FREQUENCY (MHz)
SNR (dB)
510203015 25 35 40
SLAVE NONINTEGER MODE
DAC IN = -60dBFS
f
LRCLK
= 32kHz, 44.1kHz, 48kHz
AV
DD
= 3.0V
f
ICLK
= f
MCLK
/ 1
f
ICLK
= f
MCLK
/ 2
f
ICLK
= f
MCLK
/ 3
f
ICLK
= f
MCLK
/ 4
20
0
-20
-40
-60
-80
-120
-140
10 100 10k 100k
WIDEBAND FFT
-100
MAX9850toc33
FREQUENCY (Hz)
V
OUT
(dBFS)
1k
DAC IN = 0dBFS
DAC IN TO LINE OUT
f
IN
= 1kHz
20
0
-20
-40
-60
-80
-120
-140
10 100 10k 100k
WIDEBAND FFT
-100
MAX9850toc34
FREQUENCY (Hz)
V
OUT
(dBFS)
1k
DAC IN = -60dBFS
DAC IN TO LINE OUT
f
IN
= 1kHz
10
15
20
25
30
35
40
-40 -15 3510 60 85
OUTPUT POWER
vs. TEMPERATURE
MAX9850toc35
TEMPERATURE (°C)
OUTPUT POWER (mW)
AV
DD
= 1.8V
THD+N = 1%
R
LOAD
= 16Ω
R
LOAD
= 32Ω
2
4
6
3
5
7
8
9
10
1.8 2.2 3.02.6 3.42.0 2.82.4 3.2 3.6
AV
DD
AND PV
DD
SUPPLY CURRENT
vs. AV
DD
AND PV
DD
SUPPLY VOLTAGE
MAX9850toc36
AV
DD
AND PV
DD
(V)
AV
DD
+ PV
DD
SUPPLY CURRENT (mA)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
2
4
1
3
6
8
5
7
9
10
1.0 2.0 3.01.5 3.52.5 4.0
DIGITAL SUPPLY CURRENT
vs. DV
DD
MAX9850toc37
DV
DD
(V)
DIGITAL SUPPLY CURRENT (mA)
T
A
= +85°C, +25°C, -40°C
Typical Operating Characteristics (continued)
(DV
DD
= AV
DD
= PV
DD
= 3.0V, AGND = DGND = PGND = 0V, C1 = 0.47µF, C2 = 2.2µF, C
NREG
= C
PREG
= C
REF
= 1µF, f
S
= 48kHz,
f
MCLK
= 12.288MHz, master integer mode, headphone volume set to +6dB, both channels driven in-phase, T
A
= +25°C, unless
otherwise noted. f
IN
= 984.375Hz, A-weighted THD+N.)