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參數(shù)資料
| 型號： | TDA7528 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-64 |
| 文件頁數(shù)： | 17/65頁 |
| 文件大?。?/td> | 610K |
| 代理商： | TDA7528 |
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Electrical characteristics
TDA7528
Doc ID 13141 Rev 6
3.5.4
AM AGC
The time constant of the AM AGC is defined by an external capacitor and the programmable
internal currents (details given in the Table 12).
Control behavior:
The AM RF AGC is realized with two output pins which controls the gain of the
corresponding pre-stage.
The control behavior can be programmed to the following modes:
1.
Controlled current output mode 1
data byte AMAGC[3:0] = 1000
positive current I = f(e): after reaching the AGC threshold voltage the current output
delivers a current I = f(e) up to 15 mA in a voltage range from 0.1 V up to VCC-1.5 V.
Figure 6.
AM AGC - Controlled current output mode 1
2.
Constant current mode
data byte AMAGC[3:0] = 0100
constant current mode: the output current can be set to 2 mA source current. The AGC
detector is in power-down mode and only the pin diode driver is active.
3.
Voltage and current mode with hand-over
a)
internal feedback
data byte AMAGC[3:0] = 1001
voltage and current mode with hand-over: the Vthr level is programmable in the
range 1 V to 2.6 V.
This mode can be used in combination with both the internal and the external
LNA. In combination with the internal AM LNA, the maximum output voltage is
limited to 2.7 V.
Figure 7.
AM AGC - Voltage and current mode with hand-over
b)
external feedback
data byte AMAGC[3:0] = 1011
Voltage and current mode with hand-over: the Vthr level is programmable in the
range 0.2 to 2.6 V. The voltage Vthr is the internal reference voltage for the
V_TCAGCAM
Iout
15mA
f(e) current
V_TCAGCAM
Iout
15mA
f(e) current
Iout
15mA
f(e) current
Iout
Vout
Vthr
Iout
Vout
Vthr
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| TDA7528TR | 功能描述:音頻放大器 AM/FM car radio Front-End IF Signal RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA7529 | 功能描述:調(diào)諧器 RF front-end AM/FM DSP car-radio IF Sig RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| TDA7529_11 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:RF front-end for AM/FM DSP car-radio with IF sampling |
| TDA7529TR | 功能描述:調(diào)諧器 RF front-end AM/FM DSP car-radio IF Sig RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| TDA7535 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Delta/sigma cascade 20 bit stereo DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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