参数资料
型号: MAX9776ETJ+T
厂商: Maxim Integrated Products
文件页数: 20/38页
文件大小: 0K
描述: IC AMP AUDIO PWR 1.5W D 32TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: DirectDrive®
类型: D 类
输出类型: 1-通道(单声道),带立体声耳机
在某负载时最大输出功率 x 通道数量: 1.5W x 1 @ 4 欧姆; 60mW x 2 @ 16 欧姆
电源电压: 2.7 V ~ 5.5 V
特点: 消除爆音,差分输入,I²C,静音,短路和热保护,关机,音量控制
安装类型: 表面贴装
供应商设备封装: 32-TQFN-EP(5x5)
封装/外壳: 32-WFQFN 裸露焊盘
包装: 带卷 (TR)
配用: MAX9776EVKIT+-ND - EVALUATION KIT FOR MAX9776
Write Data Format
A write to the MAX9775/MAX9776 includes transmis-
sion of a START condition, the slave address with the
R/W bit set to 0 (Table 1), one byte of data to configure
the Command Register, and a STOP condition. Figure
11 illustrates the proper format for one frame.
The MAX9775/MAX9776 only accept write data, but
they acknowledge the receipt of the address byte with
the R/W bit set high. The MAX9775/MAX9776 do not
write to the SDA bus in the event that the R/W bit is set
high. Subsequently, the master reads all 1’s from the
MAX9775/MAX9776. Always set the R/W bit to zero to
avoid this situation.
Programming the MAX9775/MAX9776
The MAX9775/MAX9776 are programmed through 6
control registers. Each register is addressed by the 3
MSBs (B5–B7) followed by 5 configure bits (B0–B4) as
shown in Table 2. Correct programming of the
MAX9775/MAX9776 requires writing to all 6 control reg-
isters. Upon power-on, their default settings are as list-
ed in Table 3.
MAX9775/MAX9776
2 x 1.5W, Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
______________________________________________________________________________________
27
S
ACK
0
ACKNOWLEDGE FROM
MAX9775/MAX9776
R/W
ACKNOWLEDGE
FROM MAX9775/MAX9776
B7 B6 B5 B4 B3 B2
COMMAND BYTE IS STORED ON
RECEIPT OF STOP CONDITION
ACK
P
B1 B0
SLAVE ADDRESS
COMMAND BYTE
Figure 11. Write Data Format Example
B7
B6
B5
B4
B3
B2
B1
B0
FUNCTION
COMMAND
DATA
Input Mode Control
0
INA+20dB
INMODE (Tables 5a and 5b)
Mono Volume Control
0
1
MVOL (Table 7)
Left Volume Control
0
1
0
LVOL (Table 7)
Right Volume Control
0
1
RVOL (Table 7)
Output Mode Control
1
0
MONO+6dB
OUTMODE (Table 9)
Global Control Register
1
0
1
SHDN
IN+6dB
MUTE
SSM
3D/MONO
Table 2. Control Registers
COMMAND
DATA
DESCRIPTION
Input Mode (000)
10000
Input A gain = +20dB; input A, B, and C singled-ended stereo inputs
Mono Volume (001)
11111
Maximum volume
Left Volume (010)
11111
Maximum volume
Right Volume (011)
11111
Maximum volume
Output Mode (100)
01000
0dB of extra mono gain, mode 8: stereo headphone, stereo speaker
Global Control Register (101)
00011
Powered-off, input B/C gain = 0dB, MUTE off, SSM on, 3D/MONO on
Table 3. Power-On Reset Conditions
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MAX9778ETI+T 功能描述:音频放大器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel