- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2091 > MAX9744ETH+ (Maxim Integrated Products)IC AMP AUDIO PWR 22.5W D 44TQFN PDF資料下載
參數(shù)資料
| 型號： | MAX9744ETH+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 8/28頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO PWR 22.5W D 44TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 43 |
| 類型： | D 類 |
| 輸出類型： | 2 通道（立體聲） |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 22.5W x 2 @ 4 歐姆 |
| 電源電壓： | 4.5 V ~ 14 V |
| 特點： | 消除爆音，靜音，短路和熱保護，關(guān)機，音量控制 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 44-TQFN-EP（7x7） |
| 封裝/外殼： | 44-WFQFN 裸露焊盤 |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1392 (CN2011-ZH PDF) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
MAX9744
20W Stereo Class D Speaker Amplifier
with Volume Control
16
______________________________________________________________________________________
Volume Control
For maximum flexibility, the MAX9744 features volume
control operation using an analog voltage input or
through the I2C interface. To set the device to analog
mode, connect ADDR1 and ADDR2 to GND. In analog
mode, SDA/VOL is an analog input for volume control.
The analog input range is ratiometric between 0.9 x
VDD and 0.1 x VDD where 0.9 x VDD = full mute and 0.1
x VDD = full volume (Table 7).
Use ADDR1 and ADDR2 to select I2C mode. There are
three addresses that can be chosen, allowing for multi-
ple devices on a single bus (Table 4). In I2C mode, vol-
ume is controlled by choosing the speaker volume
control register in the command byte (Table 5). There
are 64 volume settings, where the lowest setting is full
mute (Table 6). See the
Write Byte section for more
information on formatting data and tables to set volume
levels. The default volume after power-up is position 40
(-7.1dB) (see Table 7).
I2C Interface
The MAX9744 features an I2C 2-wire serial interface
consisting of a serial-data line (SDA) and a serial-clock
line (SCL). SDA and SCL facilitate communication
between the MAX9744 and the master at clock rates up
to 400kHz. Figure 3 shows the 2-wire interface timing
diagram. The MAX9744 is a receive-only slave device,
relying on the master to generate the SCL signal. The
MAX9744 cannot write to the SDA bus except to
acknowledge the receipt of data from the master. The
master, typically a microcontroller, generates SCL and
initiates data transfer on the bus.
A master device communicates to the MAX9744 by
transmitting the proper address followed by the data
word. Each transmit sequence is framed by a START (S)
or Repeated START (Sr) condition and a STOP (P) condi-
tion. Each word transmitted over the bus is 8 bits long
and is always followed by an acknowledge clock pulse.
The MAX9744 SDA line operates as both an input and
an open-drain output. A pullup resistor, greater than
500
Ω, is required on the SDA bus. The MAX9744 SCL
line operates as an input only. A pullup resistor, greater
than 500
Ω, is required on SCL if there are multiple mas-
ters on the bus, or if the master in a single-master sys-
tem has an open-drain SCL output. Series resistors in
line with SDA and SCL are optional. The SCL and SDA
inputs have Schmitt trigger and filter circuits that sup-
press noise spikes to assure proper device operation
even on a noisy bus.
SCL
SDA
START
CONDITION
STOP
CONDITION
REPEATED
START
CONDITION
START
CONDITION
tHD, STA
tSU, STA
tHD, STA
tSP
tBUF
tSU, STO
tLOW
tSU, DAT
tHD, DAT
tHIGH
tR
tF
Figure 3. 2-Wire Serial-Interface Timing Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX9753ETI+T | IC AMP AUDIO PWR 2.2W D 28TQFN |
| MAX9755ETI+T | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| MAX9758ETJ+T | IC AMP AUDIO PWR 2.3W AB 32TQFN |
| MAX9759ETE+T | IC AMP AUDIO PWR 3.2W D 16TQFN |
| MAX9763ETI+T | IC AMP AUDIO PWR 3W MONO 28TQFN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9744ETH+ | 功能描述:音頻放大器 Stereo 20W Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9744ETH+T | 功能描述:音頻放大器 Stereo 20W Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9744EVCMAXQU+ | 功能描述:音頻放大器 Evaluation Kit/Evaluation System for the MAX9744 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9744EVKIT+ | 功能描述:音頻放大器 Evaluation Kit/Evaluation System for the MAX9744 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX974CPE | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。