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參數資料
型號: MAX9820EVKIT+
廠商: Maxim Integrated Products
文件頁數: 12/13頁
文件大小: 0K
描述: KIT EVAL FOR MAX9820
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 1
系列: DirectDrive®
放大器類型: AB 類
輸出類型: 耳機,2-通道(立體聲)
在某負載時最大輸出功率 x 通道數量: 95mW x 2 @ 32 歐姆
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
板類型: 完全填充
已用 IC / 零件: MAX9820
已供物品:
相關產品: MAX9820ETB+TTR-ND - IC AMP AUD HDPHE 95MW 10TDFN
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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相關代理商/技術參數
參數描述
MAX9820EVKIT+ 功能描述:音頻 IC 開發工具 MAX9820 Eval Kit RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
MAX982CPA 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 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 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX982CPA+ 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 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 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX982CSA 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 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 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX982CSA+ 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 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 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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