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| 型号： | MAX9879ERV+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/32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
15
Maxim Integrated
Pin Description
BUMP
NAME
FUNCTION
A1
C1P
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1F capacitor between C1P and C1N.
A2
OUTL-
Left-Speaker Negative Output
A3
PVDDL
Left-Channel Class D Power Supply. Bypass with a 1F capacitor to PGNDL.
A4
OUTL+
Left-Speaker Positive Output
A5, B5
PGNDR
Right-Channel Class D Power Ground
A6
OUTR-
Right-Speaker Negative Output
B1
C1N
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1F capacitor between C1P and C1N.
B2
RXIN-
Receiver Bypass Negative Input
B3
PGNDL
Left-Channel Class D Power Ground
B4
RXIN+
Receiver Bypass Positive Input
B6
PVDDR
Right-Channel Class D Power Supply. Bypass with a 1F capacitor to PGNDL.
C1
VSS
Headphone Amplifier Negative Power Supply. Bypass with a 1F capacitor to PGND.
C2, C3, C4,
C5
GND
Analog Ground
C6
OUTR+
Right-Speaker Positive Output
D1
HPL
Headphone Amplifier Right Output
D2
BIAS
Common-Mode Bias. Bypass to GND with a 1F capacitor.
D3
INB1
Input B1. Left input or negative input.
D4
INA1
Input A1. Left input or negative input.
D5
SCL
Serial-Clock Input. Connect a pullup resistor from SDA to VCCIO.
D6
SDA
Serial-Data Input/Output. Connect a pullup resistor from SDA to VCCIO.
E1
HPR
Headphone Amplifier Left Output
E2
VDD
Analog Supply. Connect to PVDDL and PVDDR. Bypass with a 1F capacitor to GND.
E3
INB2
Input B2. Right input or positive input.
E4
INA2
Input A2. Right input or positive input.
E5
SHDN
Active-Low Shutdown Input Signal
E6
VCCIO
I2C Power Supply
Detailed Description
Signal Path
The MAX9879 signal path consists of flexible inputs,
signal mixing, volume control, and output amplifiers
(Figures 1a, 1b, 1c).
The inputs can be configured for single-ended or differ-
ential signals (Figure 2). The internal preamplifiers fea-
ture three programmable gain settings of 0dB, +5.5dB,
and +20dB. Following preamplification, the input sig-
nals are mixed, volume adjusted, and routed to the
headphone and speaker amplifiers based on the out-
put mode configuration (see Table 6). The volume con-
trol stages provide up to 75dB attenuation. The
headphone amplifiers provide +3dB of gain while the
speaker amplifier provides +18dB of additional gain.
When an input is configured as mono differential, it can
be routed to both speakers or to both headphones.
When an input is stereo, it is routed to either the stereo
headphones or the stereo speakers. Simultaneous oper-
ation is also possible. If the right speaker amplifier is dis-
abled then the left and right audio signals are summed
into the left speaker amplifier and vice-versa.
When the application does not require the use of both
INA_ and INB_, the SNR of the MAX9879 is improved
by deselecting the unused input through the I2C output
mode register and AC-coupling the unused inputs to
ground with a 330pF capacitor. The 330pF capacitor
and the input resistance to the MAX9879 form a high-
pass filter preventing audible noise from coupling into
the outputs.
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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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