MAX9850ETI+T Maxim Integrated Products, MAX9850ETI+T Datasheet - Page 24

• Manufacturer Part Number: MAX9850ETI+T
• Description: IC AMP AUDIO .095W STER 28TQFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class ABr

Specifications of MAX9850ETI+T

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 95mW x 2 @ 16 Ohm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Features: DAC, Depop, Digital Inputs, I²C, I²S, Line Level Inputs & Outputs, Mute, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 28-WQFN Exposed Pad, 28-HWQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1 = Mute headphone outputs.
0 = Unmute headphone outputs.
Set MUTE = 1 to mute the headphone outputs (HPR,
HPL). The headphone output is muted on the first zero
crossing of the audio signal if zero-crossing detect is
enabled.
Stereo Audio DAC with DirectDrive
Headphone Amplifier
Table 12. Volume (0x2) Read/Write, Bit
Descriptions
Table 13. Volume Control Settings
24
MUTE SLEW
B7
VOL(5:0)
______________________________________________________________________________________
0x0A
0x0B
0x0C
0x0D
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
B6
B5
SETTING (dB)
+6.0
+5.5
+5.0
+4.5
+4.0
+3.5
+3.0
+2.5
+1.5
+0.5
-0.5
-1.5
-3.5
-5.5
B4
Volume Register (0x2)
B3
VOL(5:0)
Mute Enable (MUTE)
B2
B1
VOL(5:0)
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
B0
SETTING (dB)
1 = Enable slew-rate control.
0 = Disable slew-rate control.
The slew-rate control allows the headphone amplifiers to
smoothly slew between volume settings after a volume
change is made. Volume changes occur immediately
when the slew-rate control is disabled.
VOL(5:0) controls the headphone amplifier volume
attenuation. Code 0x00 is full volume while 0x28 to 0x3F
is full attenuation. VMN sets to 1 when code 0x3F is pro-
grammed and the minimum volume is reached. Table
13 lists the volume attenuation settings for each code.
-11.5
-13.5
-15.5
-17.5
-19.5
-21.5
-23.5
-25.5
-27.5
-29.5
-31.5
-33.5
-7.5
-9.5
Slew-Rate Control Enable (SLEW)
0x28-0x3F
Volume Control (VOL(5:0))
VOL(5:0)
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
—
SETTING (dB)
-35.5
-37.5
-39.5
-41.5
-45.5
-49.5
-53.5
-57.5
-61.5
-65.5
-69.5
-73.5
Mute
—