Datasheet
MAX9850
Stereo Audio DAC with DirectDrive
Headphone Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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 to AGND,
R
LOAD_HP
= 32Ω to AGND, R
LOAD_OUT
= 10kΩ to AGND, f
LRCLK
= 48kHz, f
MCLK
= 12.288MHz, volume set to -9.5dB, T
A
= T
MIN
to
T
MAX
, unless otherwise noted. Typical specifications at T
A
= +25°C, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
(Voltages with respect to AGND.)
DV
DD
, AV
DD
, PV
DD
..................................................-0.3V to +4V
AV
DD
Referenced to PV
DD
....................................-0.3V to +0.3V
SV
SS
, PV
SS
...............................................................-4V to +0.3V
SV
SS
Referenced to PV
SS
.....................................-0.3V to +0.3V
DGND, PGND........................................................-0.3V to +0.3V
BCLK, LRCLK, HPS, SDIN.......................-0.3V to (DV
DD
+ 0.3V)
GPIO, MCLK.............................................................-0.3V to +4V
REF, PREG...............................................-0.3V to (AV
DD
+ 0.3V)
NREG ........................................................+0.3V to (SV
SS
- 0.3V)
SDA, SCL, ADD ........................................................-0.3V to +4V
INL, INR .......................................................................-2V to +2V
HPR, HPL.....................................(SV
SS
- 0.3V) to (AV
DD
+ 0.3V)
OUTL, OUTR .............................(NREG - 0.3V) to (PREG + 0.3V)
C1N ............................................(PV
SS
- 0.3V) to (PGND + 0.3V)
C1P ............................................(PGND - 0.3V) to (PV
DD
+ 0.3V)
Current Into/Out of Any Pin ...............................................100mA
Duration of HPL, HPR, OUTL,
OUTR Short Circuit to AGND .................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN (derate 35.7mW/°C above +70°C) .....2857mW
Junction Temperature......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Analog Supply Voltage
AV
DD
,
PV
DD
AV
DD
= PV
DD
1.8 3.6 V
Digital Supply Voltage DV
DD
1.8 3.6 V
AV
DD
= 1.8V 5.5 7.7
Full operation (Note 2),
no headphone or line
output load
AV
DD
= 3.0V 5.9
AV
DD
= 1.8V 3.5 5.3
Analog Supply Current AI
DD
Full operation (Note 2),
headphones disabled
AV
DD
= 3.0V
3.75
mA
DV
DD
= 1.8V 2.1 2.9
Digital Supply Current DI
DD
Full operation (Note 2),
no line output load
DV
DD
= 3.0V 3.8
mA
Analog Shutdown Current
AI
SHDN
I
AVDD
+ I
PVDD
,
A
VDD
= P
VDD
= 1.8V 1.5 10 µA
Digital Shutdown Current
DI
SHDN
Static digital interface, D
VDD
= 1.8V 0.3 5 µA
Shutdown to Full Operation
(Note 2)
t
ON
1.3 ms
Power-On to Full Operation
(Note 2)
t
PON
1.4 ms
DAC PERFORMANCE/LINE OUTPUTS (Note 3)
0dBFS Output Voltage
V
OUT_FS
1.85 1.95 2.05
V
P-P
AV
DD
= 3.0V
87.5
Dynamic Range (Note 4) DR
AV
DD
= 1.8V 82
87.5
dB
Unweighted 88
A-weighted 91
AV
DD
= 1.8V, unweighted 88
Signal-to-Noise Ratio
(Note 5)
SNR
AV
DD
= 1.8V, A-weighted 91
dB