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參數資料
| 型號： | MAX9875ERP+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 7/30頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AUDIO SUBSYSTEM 20UCSP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 系列： | DirectDrive® |
| 類型： | D 類 |
| 輸出類型： | 1-通道（單聲道），帶立體聲耳機 |
| 在某負載時最大輸出功率 x 通道數量： | 825mW x 1 @ 4 歐姆; 53mW x 2 @ 16 歐姆 |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 特點： | 消除爆音，差分輸入，I²C，靜音，短路和熱保護，關機，音量控制 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 20-UCSP |
| 封裝/外殼： | 20-WFBGA，CSPBGA |
| 包裝： | 帶卷 (TR) |
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MAX9875
Low RF Susceptibility, Mono Audio
Subsystem with DirectDrive Headphone Amplifier
______________________________________________________________________________________
15
Pin Description
PIN
NAME
FUNCTION
A1
HPR
Right Headphone Output
A2
HPL
Left Headphone Output
A3
VSS
Headphone Amplifier Negative Power Supply. Bypass with a 1F capacitor to PGND.
A4
C1N
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1F capacitor between C1P and C1N.
A5
C1P
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1F capacitor between C1P and C1N.
B1
VDD
Analog Supply. Connect to PVDD. Bypass with a 1F capacitor to GND.
B2
BIAS
Common-Mode Bias. Bypass to GND with a 1F capacitor. Pulse low to reset the part and place in
shutdown (see the Typical Application Circuit).
B3
SDA
Serial-Data Input. Connect a pullup resistor from SDA to a 1.7V to 3.6V supply.
B4
N.C.
No Connection
B5
OUT+
Positive Speaker Output
C1
INB2
Input B2. Right input or positive input (see the Differential Input Configuration (
IN_) section).
C2
INB1
Input B1. Left input or negative input (see the Differential Input Configuration (
IN_) section).
C3
SCL
Serial-Clock Input. Connect a pullup resistor from SCL to a 1.7V to 3.6V supply.
C4
PGND
Power Ground
C5
PVDD
Class D and Charge-Pump Power Supply. Bypass with a 1F capacitor to PGND.
D1
INA2
Input A2. Right input or positive input (see the Differential Input Configuration (
IN_) section).
D2
INA1
Input A1. Left input or negative input (see the Differential Input Configuration (
IN_) section).
D3
GND
Analog Ground
D4
N.C.
No Connection
D5
OUT-
Negative Speaker Output
Detailed Description
Signal Path
The MAX9875 signal path consists of flexible inputs,
signal mixing, volume control, and output amplifiers
(Figure 1).
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, +9dB,
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 7). The volume con-
trol stages provide up to 75dB attenuation. The
headphone amplifier is configured as a unity-gain
buffer while the speaker amplifier provides +12dB of
additional gain.
When an input is configured as mono differential it can
be routed to the speaker or to both headphones. When
an input is stereo, it is mixed to mono without attenuation
for the speaker and kept stereo for the headphones.
When the application does not require the use of both
INA_ and INB_, the SNR of the MAX9875 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 MAX9875 form a high-
pass filter preventing audible noise from coupling into
the outputs.
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相關代理商/技術參數 |
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| MAX9877AERP+T | 功能描述:音頻放大器 Audio Subsystem w/DirectDrive RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9877AEWP+G45 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9877AEWP+TG45 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9877EBP+G45 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9877EBP+TG45 | 制造商:Maxim Integrated Products 功能描述: |
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