參數(shù)資料
型號(hào)： TDA8295HN/C2
廠商： NXP SEMICONDUCTORS
元件分類： 接收器
英文描述： AM/FM, AUDIO/VIDEO DEMODULATOR, PQCC40
封裝： 6 X 6 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT618-1, HVQFN-40
文件頁(yè)數(shù)： 70/83頁(yè)
文件大?。?/td> 3440K
代理商： TDA8295HN/C2
TDA8295_C2_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 27 November 2009
72 of 83
NXP Semiconductors
TDA8295
Digital global standard low IF demodulator for analog TV and FM radio
13.5 Reset operation
13.5.1 Hardware reset
After a hardware reset, the registers are set to default (power-on reset values) according
to Table 10. M/N standard is the default standard.
CS[2:0] has to be reprogrammed to a value equal or higher than 1.00 (corresponding to
CS[2:0] = 100 or 101 or 110), because the default value is not allowed (full performance is
not guarantied with the default value).
13.5.2 Software reset
A software reset can be done each time something has been programmed. The software
reset does not affect the content of the registers but clears the flip-flops in the design. For
the activation of the software reset see Table 49 bit CLB.
13.6 Application hints
In case GPIO1 and GPIO2 are configured as I2C-bus feed-through, a capacitor
C = 33 pF to GND must be added at pin 32 (GPIO1/SCL_O). This ensures a reliable
behavior in Read mode.
The detailed application diagram (see Figure 15) shows the video DAC connection
driving a 75
Ω DC load and the sound DAC driving > 1 kΩ AC/DC load. Power-save
mode: In order to reduce power consumption, the video DAC can be run with half
current and the sound DAC with a quarter current by changing RSET (R12 in
Figure 15) to 2 k
Ω. This is possible, if the audio/video processor is rather high-ohmic
(> 1 k
Ω). The following components in Figure 15 have to be replaced then:
R13 = 75
Ω; R15 and R16 = 150 Ω; C5 = 220 pF; C6 = 120 pF. A performance
degradation is not expected in the Power-save mode.
The TDA8295 has been designed in such a way, that a simple upgrade of the
predecessor TDA8290 is possible:
1. Change the 1.8 V power supply to 1.2 V. This can be done easily with a variable
voltage regulator, where the sense pin is grounded. This delivers the band gap
voltage of 1.25 V to the output. Or take a fixed regulator.
2. The RSET resistor (R12 in Figure 15) has to be decreased by 20 % in order to make
the DAC output swing higher (1.5 V instead of 1.25 V).
Fig 16. Hardware reset operation
001aah362
TDA8295 normal operation
starts after 4 falling edges of XIN
the TDA8295 enters
immediately in its reset mode
TXIN
minimum width at LOW is 4
× TXIN
RST_N
XIN
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA8296 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital global standard low IF demodulator for analog TV and FM radio
TDA8296HN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital global standard low IF demodulator for analog TV and FM radio
TDA8296HN/C1,518 功能描述:調(diào)節(jié)器/解調(diào)器 DIGITAL GLOBAL IF DEMODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel
TDA8296HN/C1,551 功能描述:調(diào)節(jié)器/解調(diào)器 DIGITAL GLOBAL IF DEMODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel
TDA8296HN/C1,557 功能描述:調(diào)節(jié)器/解調(diào)器 DIGITAL GLOBAL IF DEMODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel
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