- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373624 > TDA7512 (意法半導(dǎo)體) AM/FM CAR RADIO TUNER IC WITH INTELLIGENT SELECTIVITY SYSTEM ISS PDF資料下載
參數(shù)資料
| 型號： | TDA7512 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | AM/FM CAR RADIO TUNER IC WITH INTELLIGENT SELECTIVITY SYSTEM ISS |
| 中文描述： | 調(diào)幅/調(diào)頻收音機調(diào)諧器集成電路汽車智能識別系統(tǒng)與國際空間站 |
| 文件頁數(shù)： | 18/42頁 |
| 文件大?。?/td> | 761K |
| 代理商： | TDA7512 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁
TDA7512
18/42
narrow filtered IF2 before demodulation. A switch controlled by IF counter mode (IFCM) is chosing the input sig-
nal for IF counter.
The grade of integration is adjustable by eight different measuring cycle times. The tolerance of the accepted
count value is adjustable, to reach an optimum compromise for search speed and precision of the evaluation.
1.7.8
The IF counter works in 3 modes controlled by IFCM register.
The IF-Counter Mode
1.7.9
A sampling timer generates the gate signal for the main counter. The basically sampling time are in FM mode
6.25kHz (t
TIM
=160
μ
s) and in AM mode 1kHz (t
TIM
=1ms). This is followed by an asynchronous divider to gener-
ate several sampling times.
Sampling Timer
1.7.10 Intermediate Frequency Main Counter
This counter is a 11 - 21-bit synchronous autoreload down counter. Five bits (CF) are programmable to have
the possibility for an adjust to the centre frequency of the IF-filter. The counter length is automatic adjusted to
the chosen sampling time and the counter mode (FM, AM-UPC, AM).
At the start the counter will be loaded with a defined value which is an equivalent to the divider value
(t
Sample
x f
IF
).
If a correct frequency is applied to the IF counter frequency input at the end of the sampling time the main
counter is changing its state from 0h to 1FFFFFh.
This is detected by a control logic and an external search stop output is changing from LOW to HIGH. The fre-
quency range inside which a successful count result is adjustable by the EW bits.
t
CNT
= (CF + 1696+1) / f
IF
t
CNT
= (CF + 10688+1) / f
IF
t
CNT
= (CF + 488+1) / f
IF
FM mode
AM up conversion mode
AM mode
Counter result succeeded:
t
TIM
≥
t
CNT
- t
ERR
t
TIM
≤
t
CNT
+ t
ERR
Counter result failed:
t
TIM
> t
CNT
+ t
ERR
t
TIM
< t
CNT
- t
ERR
t
TIM
= IF timer cycle time (sampling time)
t
CNT
= IF counter cycle time
t
ERR
= discrimination window (controlled by the EW registers)
The IF counter is only started by inlock information from the PLL part. It is enabled by software (IFENA).
1.7.11 Adjustment of the Measurement Sequence Time
The precision of the measurements is adjustable by controlling the discrimination window. This is adjustable by
programming the control registers EW.
The measurement time per cycle is adjustable by setting the registers IFS.
1.7.12 Adjust of the Frequency Value
The center frequency of the discrimination window is adjustable by the control registers CF.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7513T | SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER AND AUDIO PROCESSOR |
| TDA7515 | RF-FRONTEND FOR AM/FM-DSP-CARRADIOS WITH IF SAMPLING |
| TDA7518 | MULTICHIP MODULE FOR CAR-RADIO APPLICATIONS |
| TDA7519TR | MULTICHIP MODULE FOR CAR-RADIO APPLICATIONS |
| TDA7519 | MULTICHIP MODULE FOR CAR-RADIO APPLICATIONS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7512F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:FM car-radio tuner IC with intelligent selectivity system (ISS) |
| TDA7513T | 制造商:STMicroelectronics 功能描述: |
| TDA7513T_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Single chip FM/AM tuner with stereo decoder and audio processor |
| TDA7514 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER AND AUDIO PROCESSOR |
| TDA7515 | 功能描述:音頻 DSP RF Front End RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。