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参数资料
| 型号： | LM4889ITLX/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： | 8/9页 |
| 文件大小： | 656K |
| 代理商： | LM4889ITLX/NOPB |
LA72914V
No.A1859-8/9
[De-modulation block]
Demodulate audio signal from modulated audio signal.
FM-Audio signal is input from pin5. Go through 4.5M-Trap-filter or 6.5MHz-Trap-filter and AGC go to demodulator. After
demodulator go to De-emphasis circuit. After de-emphasis circuit signal is output pin7. Pin7 signal is charge to DC bias for
coupling capacitor at pin8. Audio signal from pin8 go to 6dB AMP then output from pin9. (Door-phone application, there are two
FM carrier. In this case we recommend add BPF before pin5 FM-Audio signal input.)
4.5M/6.5MHz-Trap-filter: Internal Trap-filter is change for pin6 mode control. (If modulator frequency is 4.5MHz, then internal
Trap-filter is 4.5MHz.)
AGC: After AGC level is control about 0.3Vp-p. After AGC signal go to pin12 FM-monitor and de-modulator.
De-emphasis circuit: The pin7 owns an De-emphasis characteristic which connected capacitor. Recommended value = 10nF.
Output signal level: If input FM signal deviation is ±25 kHz, then output signal level is 1Vp-p (TYP) from pin9/ (Load resistance:
10k
Ω at 1 kHz.)
Characteristics
Frequency responce TxIn-RxOut
-15
-9
-6
-3
-12
3
0.01
0.1
10
1
100
0
400
800
200
600
10
100
1000
1500
1000
500
400
500
300
200
ALC characteristics
0
2000
0
100
600
1200
FMAGC characteristics
1
10000
2500
Input level, [mVp-p]
Internal
level
of
IC,
[mVp-p]
1000
Pin 16
6dB
Pin 9
ALC
Output
level,
[mVp-p]
Input level, [mVp-p]
fo=4.5MHz
(unmodulated signals)
Pin 12
Output
level,
[dB]
Frequency, [kHz]
0
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相关代理商/技术参数 |
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| 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 |
| LM4889MA/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 |
| LM4889MAX | 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 |
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