参数资料
型号: SAA7706H/N107,557
厂商: NXP Semiconductors
文件页数: 16/52页
文件大小: 0K
描述: IC CAR RADIO DSP 80-QFP
标准包装: 330
类型: 汽车信号处理器
接口: I²C,I²:S,LSB,SPDIF
电压 - 输入/输出: 3.30V
电压 - 核心: 3.30V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 80-BQFP
供应商设备封装: 80-QFP(14x20)
包装: 托盘
其它名称: 935267098557
SAA7706H/N107
SAA7706H/N107-ND
2001 Mar 05
23
Philips Semiconductors
Product specication
Car radio Digital Signal Processor (DSP)
SAA7706H
handbook, full pagewidth
MGT470
AGC
Gm
Rbias
C2
C1
C3
clock to circuit
on-chip
off-chip
OSC_IN
slave input 3.3 V(p-p)
OSC_OUT
63
64
VDD(OSC)
0.5VDD(OSC)
VSS(OSC)
65
62
Fig.14 Block diagram of the oscillator in slave mode.
8.8.1
SUPPLY OF THE CRYSTAL OSCILLATOR
The power supply connections of the oscillator are
separated from the other supply lines. This is done to
minimize the feedback from the ground bounce of the chip
to the oscillator circuit. Pin VSS(OSC) is used as ground
supply and pin VDD(OSC) as positive supply. A series
resistor plus capacitance is required for proper operating
on pin VDD(OSC), see Figs 25 and 26. See also important
remark in Section 8.10.
8.9
The phase-locked loop circuit to generate the
DSPs and other clocks
There are several reasons why a PLL circuit is used to
generate the clock for the DSPs:
The PLL makes it possible to switch in the rare cases
that tuning on a multiple of the DSP clock frequency
occurs to a slightly higher frequency for the clock of the
DSP. In this way an undisturbed reception with respect
to the DSP clock frequency is possible.
Crystals for the crystal oscillator in the range of twice the
required DSP clock frequency, so approximately
100 MHz, are always third overtone crystals and must
also be manufactured on customer demand. This makes
these crystals expensive. The PLL1 enables the use of
a crystal running in the fundamental mode and also a
general available crystal can be chosen. For this circuit
a 256
× 44.1 kHz = 11.2896 MHz crystal is chosen. This
type of crystal is widely used.
Although a multiple of the frequency of the used crystal
of 11.2896 MHz falls within the FM reception band, this
will not disturb the reception because the relatively low
frequency crystal is driven in a controlled way and the
sine wave of the crystal has in the FM reception band
only very minor harmonics.
8.10
Supply of the digital part (VDDD3V1 to VDDD3V4)
The supply voltage on pins VDDD3V1 to VDDD3V4 must be
for at least 10 ms earlier active than the supply voltage
applied to pin VDD(OSC).
8.11
CL_GEN, audio clock recovery block
When an external I2S-bus or SPDIF source is connected,
the FSDAC circuitry needs an 256fs related clock. This
clock is recovered from either the incoming WS of the
digital serial input or the WS derived from the
SPDIF1/SPDIF2 input. There is also a possibility to
provide the chip with an external clock, in that case it must
be a 256fs clock with a fixed phase relation to the source.
相关PDF资料
PDF描述
VY2392M43Y5US6TV5 CAP CER 3900PF 300V 20% RADIAL
HMC25DRAH-S734 CONN EDGECARD 50POS .100 R/A PCB
TAP226M035HSB CAP TANT 22UF 35V 20% RADIAL
VE-25P-EU CONVERTER MOD DC/DC 13.8V 200W
RCB60DHBN CONN EDGECARD 120PS R/A .050 DIP
相关代理商/技术参数
参数描述
SAA7707H 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Car radio Digital Signal Processor CDSP
SAA7708H 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Car Radio Digital Signal Processor
SAA7709/N107 制造商:PHILIPS-SEMI 功能描述:
SAA7709H/N103 功能描述:音频 DSP DIGITAL SIGNAL PROCESSOR RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube
SAA7709H/N103,518 功能描述:音频 DSP DIRAC-2 RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube