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| 型号： | MAX9879ERV+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/32页 |
| 文件大小： | 0K |
| 描述： | IC AUDIO SUBSYSTEM 30-UCSP |
| 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： | 2-通道（立体声）带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 715mW x 2 @ 8 欧姆; 58mW 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： | 30-UCSP（5x6） |
| 封装/外壳： | 30-WFBGA，CSPBGA |
| 包装： | 带卷 (TR) |
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MAX9879
Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
24
Maxim Integrated
Bypass Mode (BYPASS)
1 = MAX9879 bypass switches are closed and the
Class D amplifier is disabled.
0 = Bypass mode disabled.
This mode does not control headphone operation.
Output Mode Control Register
Speaker/Headphone Output Mode
(_SPKEN/HPEN)
The MAX9879 features independent enables and input
selection for each speaker amplifier and the headphone
amplifier. See Table 6 for a detailed description of the
available modes. If the right speaker amplifier is disabled,
the stereo signals are automatically summed to mono for
the left output and vice-versa.
I2C Interface Specification
The MAX9879 features an I2C/SMBus-compatible,
2-wire serial interface consisting of a serial-data line
(SDA) and a serial-clock line (SCL). SDA and SCL facil-
itate communication between the MAX9879 and the
master at clock rates up to 400kHz. Figure 6 shows the
2-wire interface timing diagram. The master generates
SCL and initiates data transfer on the bus. The master
device writes data to the MAX9879 by transmitting the
proper slave address followed by the register address
and then the data word. Each transmit sequence is
framed by a START (S) or REPEATED START (Sr) con-
dition and a STOP (P) condition. Each word transmitted
to the MAX9879 is 8 bits long and is followed by an
acknowledge clock pulse. A master reading data from
the MAX9879 transmits the proper slave address fol-
lowed by a series of nine SCL pulses. The MAX9879
transmits data on SDA in sync with the master-generat-
ed SCL pulses. The master acknowledges receipt of
each byte of data. Each read sequence is framed by a
START (S) or REPEATED START (Sr) condition, a not
acknowledge, and a STOP (P) condition. SDA operates
as both an input and an open-drain output. A pullup
resistor, typically greater than 500
Ω, is required on
SDA. SCL operates only as an input. A pullup resistor,
typically greater than 500
Ω, is required on SCL if there
are multiple masters on the bus, or if the single master
has an open-drain SCL output. Series resistors in line
with SDA and SCL are optional. Series resistors protect
the digital inputs of the MAX9879 from high voltage
spikes on the bus lines, and minimize crosstalk and
undershoot of the bus signals.
Bit Transfer
One data bit is transferred during each SCL cycle. The
data on SDA must remain stable during the high period
of the SCL pulse. Changes in SDA while SCL is high
are control signals (see the
START and STOP
Conditions section).
START and STOP Conditions
SDA and SCL idle high when the bus is not in use. A
master initiates communication by issuing a START con-
dition. A START (S) condition is a high-to-low transition
on SDA with SCL high. A STOP (P) condition is a low-to-
high transition on SDA while SCL is high (Figure 7).
Table 6. Speaker/Headphone Modes
BIT
DESCRIPTION
LSPKEN
Enable bit for left speaker
RSPKEN
Enable bit for right speaker
HPEN
Enable bit for headphone amplifier
ENA
Enable bit for input A
ENB
Enable bit for input B
SCL
SDA
START
CONDITION
STOP
CONDITION
REPEATED
START CONDITION
START
CONDITION
tHD:STA
tSU:STA
tBUF
tSU:STO
tLOW
tSU:DAT
tHD:DAT
tHIGH
tR
tF
Figure 6. 2-Wire Interface Timing Diagram
SMBus is a trademark of Intel Corp.
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| MAX9879EVKIT+ | 功能描述:音频放大器 Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier 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 |
| MAX987ESA | 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX987ESA+ | 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX987ESA+T | 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX987ESA-T | 功能描述:校验器 IC Single uPower Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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