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MAX9812LEXTT

更新时间： 2024-01-31 09:10:33
品牌 Logo 应用领域
美信 - MAXIM 放大器
页数 文件大小 规格书
10页 245K
描述
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias

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MAX9812LEXTT 技术参数

是否无铅： 不含铅生命周期：Active
零件包装代码：SOIC包装说明：SC-70, 6 PIN
针数：6Reach Compliance Code：unknown
风险等级：5.71Is Samacsys：N
标称带宽：22 kHz商用集成电路类型：AUDIO AMPLIFIER
增益：20 dBJESD-30 代码：R-PDSO-G6
JESD-609代码：e0长度：2 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：6
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：245认证状态：COMMERCIAL
座面最大高度：1.1 mm最大供电电压 (Vsup)：3.6 V
最小供电电压 (Vsup)：2.7 V表面贴装：YES
技术：BICMOS温度等级：INDUSTRIAL
端子面层：TIN LEAD端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：1.25 mm
Base Number Matches：1

MAX9812LEXTT 数据手册

 浏览型号MAX9812LEXTT的Datasheet PDF文件第4页浏览型号MAX9812LEXTT的Datasheet PDF文件第5页浏览型号MAX9812LEXTT的Datasheet PDF文件第6页浏览型号MAX9812LEXTT的Datasheet PDF文件第8页浏览型号MAX9812LEXTT的Datasheet PDF文件第9页浏览型号MAX9812LEXTT的Datasheet PDF文件第10页 
MAX9812/MAX9813  
Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain  
Microphone Amplifiers with Integrated Bias  
Pin Description  
PIN  
NAME  
FUNCTION  
Active-Low Shutdown Input. Connect SHDN to V  
MAX9812L/  
MAX9812H  
MAX9813L/  
MAX9813H  
for normal operation. Connect SHDN  
CC  
1
3
SHDN  
to GND for shutdown. SHDN is a high-impedance input; do not leave unconnected.  
2
3
4
2
1
8
GND  
OUT  
Ground  
Amplifier Output  
V
Positive Supply. Bypass V  
to GND with a 0.1µF capacitor.  
CC  
CC  
Low-Noise Microphone Bias Output. 2.3V output for MAX9812L/MAX9813L. 4V output for  
MAX9812H/MAX9813H.  
5
7
BIAS  
6
—
6
IN  
Amplifier Input (MAX9812)  
Amplifer Input 1 (MAX9813)  
Amplifier Input 2 (MAX9813)  
—
—
—
IN1  
IN2  
5
4
IN1/IN2 Input Selector. When IN1/IN2 is high, IN1 is selected. When IN1/IN2 low, IN2 is selected.  
The output DC bias point is set to 1.5V for the MAX9812L/  
Detailed Description  
MAX9813L and 2.5V for the MAX9812H/MAX9813H.  
The MAX9812_/MAX9813_ are low-power fixed-gain  
microphone amplifiers available in a single- or dual-  
input configuration. The gain is set at 10V/V (20dB) with  
a 400kHz, -3dB bandwidth. They also feature a low-  
noise, integrated microphone input bias voltage.  
Shutdown Mode  
SHDN controls whether the MAX9812_/MAX9813_ is  
active or in shutdown mode. Driving SHDN low forces a  
low-power (100nA) shutdown mode. In this mode, the  
OUT pin is set to a high-impedance state and the BIAS  
pin is pulled down (70kΩ). Driving SHDN high enables  
the MAX9812_/MAX9813_. SHDN is a high-impedance  
input and cannot be left unconnected.  
Single/Dual Input  
The MAX9812L/MAX9812H are single-input amplifiers  
and the MAX9813L/MAX9813H are dual-input ampli-  
fiers. All devices typically have an input impedance of  
85kΩ. The inputs to the dual version are controlled  
through a fast 2:1 mux, selectable through the IN1/IN2  
pin. Driving IN1/IN2 high selects IN1 and driving the  
IN1/IN2 low selects IN2. IN1/IN2 is designed to be dri-  
ven by a logic high of ≥2V and a logic low  
≤0.8V. The IN1/IN2 has a 10µs switching time from one  
channel to the other.  
Driving Capacitive Loads  
The MAX9812_/MAX9813_ output can drive up to 50pF  
of capacitance without sustained oscillations.  
Thermal Shutdown  
The thermal shutdown feature protects the  
MAX9812_/MAX9813_ from destruction due to overheat-  
ing caused by shorting the outputs. This protection fea-  
ture causes OUT and BIAS to shut down and go high  
impedance when the die temperature reaches +140°C.  
The device restarts after the die temperature falls below  
+120°C.  
PC2001 Low-Noise Microphone BIAS  
The MAX9812_/MAX9813_ provide a low-noise voltage  
BIAS designed for biasing electret condenser micro-  
phone (ECM) cartridges. The BIAS output is regulated  
to typically 2.3V for the MAX9812L/MAX9813L and 4V  
for the MAX9812H/MAX9813H. In the single-input ver-  
sion (MAX9812_), the BIAS output can source up to  
1mA. In the dual-input version (MAX9813_), the BIAS  
output can source up to 2mA. The MAX9812H/  
MAX9813H provides a PC2001-compliant BIAS voltage.  
Applications Information  
Power-Up  
The MAX9812_/MAX9813_ output typically settles to  
95% within 10ms after power-up.  
Typical Application Circuit  
Figure 1 shows the MAX9813H used as a preamplifier  
with the MAX9760 3W audio power amplifier.  
Output Stage  
The MAX9812_/MAX9813_ rail-to-rail output (OUT) typical-  
ly swings to within 100mV of the rails when driving 10kΩ.  
7
Maxim Integrated  
1...45678910

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