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| 型号： | MAX9820ETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/13页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUD HDPHE 95MW 10TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | DirectDrive® |
| 类型： | AB 类 |
| 输出类型： | 耳机，2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 95mW x 2 @ 32 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 消除爆音，短路保护和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1392 (CN2011-ZH PDF) |
| 其它名称： | MAX9820ETB+TDKR |
MAX9820
Detailed Description
The MAX9820 95mW stereo headphone amplifier fea-
tures Maxim’s DirectDrive architecture, eliminating the
large output-coupling capacitors required by conven-
tional single-supply headphone amplifiers. The device
features low RF susceptibility, extensive click-and-pop
suppression, undervoltage lockout (UVLO) and shut-
down control. The MAX9820 also features thermal-over-
load and short-circuit protection.
The MAX9820 is Windows Vista Premium Mobile com-
pliant (Table 1).
DirectDrive
Conventional single-supply headphone amplifiers have
their outputs biased about a nominal DC voltage (typi-
cally half the supply) for maximum dynamic range.
Large-coupling capacitors are needed to block this DC
bias from the headphone. Without these capacitors, a
significant amount of DC current flows to the head-
phone, resulting in unnecessary power dissipation and
possible damage to both headphone and headphone
amplifier.
Maxim’s DirectDrive architecture uses a charge
pump to create an internal negative supply voltage,
allowing the MAX9820 outputs to be biased at
DirectDrive Headphone Amplifier
with External Gain
8
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
C1P
Flying Capacitor Positive Terminal. Connect a 1F ceramic capacitor from C1P to C1N.
2
C1N
Flying Capacitor Negative Terminal. Connect a 1F ceramic capacitor from C1N to C1P.
3VSS
Charge-Pump Output. Bypass with a 1F capacitor to GND.
4
OUTL
Left-Channel Output
5
OUTR
Right-Channel Output
6
INR
Right-Channel Input
7
INL
Left-Channel Input
8VDD
Positive Power-Supply Input. Bypass with a 10F capacitor to GND.
9
SHDN
Active-Low Shutdown Input
10
GND
Signal Ground
—EP
Exposed Pad. Internally connected to GND. Connect to a large ground plane to maximize thermal
performance. Not intended as an electrical connection point.
DEVICE TYPE
REQUIREMENT
WINDOWS VISTA PREMIUM MOBILE
SPECIFICATIONS
MAX9820
TYPICAL PERFORMANCE
THD+N
≤ -65dB FS (100Hz, 20kHz)
-83dBFS (100Hz, 20kHz)
Dynamic range with signal
present
≤ -80dBV, A-weighted (20Hz, 20kHz)
-101dB A-weighted
(20Hz, 20kHz)
Analog Line Output
Jack (RL = 10k
Ω,
FS = 0.707VRMS)
Line output crosstalk
≤ -50dB (20Hz, 15kHz)
-73dB (20Hz, 15kHz)
THD+N
≤ -45dB FS (100Hz, 20kHz)
-85dBFS (100Hz, 20kHz)
Dynamic range with signal
present
≤ -60dBV, A-weighted (20Hz, 20kHz)
-94dB A-weighted
(20Hz, 20kHz)
Analog Headphone
Out Jack (RL = 32
Ω,
FS = 0.300VRMS)
Headphone output crosstalk
≤ -50dB (20Hz, 15kHz)
-73dB (20Hz, 15kHz)
Table 1. Windows Vista Premium Mobile Specifications vs. MAX9820 Specifications
Note: THD+N, dynamic range, and crosstalk are measured in accordance with AES-17 audio measurements standards.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9820EVKIT+ | 功能描述:音频 IC 开发工具 MAX9820 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| MAX982CPA | 功能描述:校验器 IC Dual Comparator / Reference 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 |
| MAX982CPA+ | 功能描述:校验器 IC Dual Comparator / Reference 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 |
| MAX982CSA | 功能描述:校验器 IC Dual Comparator / Reference 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 |
| MAX982CSA+ | 功能描述:校验器 IC Dual Comparator / Reference 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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