- 您现在的位置：买卖IC网 > PDF目录30755 > LM4889ITL/NOPB (NATIONAL SEMICONDUCTOR CORP) 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 PDF资料下载
参数资料
| 型号： | LM4889ITL/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| 封装： | MICRO SMD-8 |
| 文件页数： | 7/9页 |
| 文件大小： | 656K |
| 代理商： | LM4889ITL/NOPB |
LA72914V
No.A1859-7/9
Continued from preceding page.
Pin No.
Pin Name
Description
Equivalent circuit
12
AGC monitor
FM AGC monitor pin.
12
13
GND
GND pin.
14
VCO CTL
Modulation frequency fine control pin.
Adjustment frequency is, about
±220kHz at 0.5V to 4.5V
DC.
14
C1
VR1
2.4V
15
ALC CTL
Audio ALC filter pin.
Please connect 0.47
μF capacitor.
15
C1
16
TX Audio IN
(TX-OFF_CTL)
Audio signal input pin.
Internal bias is 2.4V DC. Please use capacitor coupling. If
DC voltage set to under 0.4V DC, then modulator circuit
stops. Demodulation circuit is work. This is receiving only
mode. (TX-OFF: 0 to 0.4V)
16
C1
2.4V
Signal processing outline
[Modulation block]
Audio signal is input from pin16. (Internal bias is DC 2.4V.) Go through AMP (6dB)/ALC/LPF (10 kHz) and emphasis circuit,
then input FM-modulation block. After FM-modulation block, go to output driver block then FM-audio signal output from pin1.
ALC: ALC circuit work at pin16 input level over than 0.5Vp-p.
LPF: LPF gain is -3dB at 10 kHz and -6dB/oct. Keep over modulation from emphasis characteristic.
Emphasis circuit: The pin3 owns an Emphasis characteristic which connected capacitor. Recommended value = 6800pF.
FM modulation: Carrier frequency is choosing from pin6 voltage. When pin16 input level is 0.5Vp-p, then FM deviation set to ±25
kHz. Internal LPF reduce harmonic spectrum.
Output Driver: Output AC voltage is about 2.0Vp-p. (Load resistance: 1kΩ)
相关PDF资料 |
PDF描述 |
|---|---|
| LM4889ITLX/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| LM4889LD/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4890LD/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO10 |
| LM4890IBPX/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| LM4890IBP/NOPB | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4889ITLX | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1W Class-AB 8-Pin uSMD T/R |
| LM4889ITLX/NOPB | 功能描述:音频放大器 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 |
| LM4889LD/NOPB | 功能描述:IC AMP AUDIO PWR 1W MONO 10LLP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 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:H 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:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4889MA | 功能描述:音频放大器 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 |
| LM4889MA /NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1W Class-AB 8-Pin SOIC N Rail |
发布紧急采购，3分钟左右您将得到回复。