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| 型號： | TDA8757HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | ADC |
| 英文描述： | Triple 8-bit ADC 170 Msps |
| 中文描述： | 3-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP144 |
| 封裝： | HEAT SINK, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 20/37頁 |
| 文件大小： | 895K |
| 代理商： | TDA8757HL |
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Philips Semiconductors
TDA8757
Triple 8-bit ADC 170 Msps
Preliminary data
Rev. 07 — 28 February 2002
20 of 37
9397 750 09457
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
Bits ‘Vco1’ and ‘Vco0’ control the VCO gain.
The default programmed value is as follows:
Internal resistance = 2.25 k
VCO gain = 70 MHz/V.
9.1.6
Divider register
This register controls the PLL frequency. Bits ‘Di8’ to ‘Di0’ are the LSB bits. The
default programmed value is 0110 1001 1000 = 1688.
The MSB bits (‘Di11’, ‘Di10’ and ‘Di9’) and the LSB bit ‘Di0’ have to be programmed
before bits ‘Di8’ to ‘Di1’ in order to have the required divider ratio. Bit ‘Di0’ is used for
the parity divider number (Di0 = 0: even number; Di0 = 1: odd number). It should be
noted that if the I
2
C-bus programming is done in mode 1 and the bit ‘Di0’ has to be
toggled, then the registers have to be loaded twice to update the divider ratio.
9.1.7
Phase register
Bit ‘Ckext’ is logic 0 when the PLL clock is used, and logic 1 when the external clock
is used.
Bit ‘Ckrs’ is logic 1 when the synchronization is done with CKREF (see
Figure 3
).
Bits ‘P4’ to ‘P0’ are used to program the phase shift for the clock pixel.
Table 9:
Z2
0
0
0
0
1
1
1
1
VCO register bits
Z1
0
0
1
1
0
0
1
1
Z0
0
1
0
1
0
1
0
1
Resistance (k
)
high-impedance
9
6.4
4.5
3.2
2.25
1.6
1.1
Table 10: VCO gain control
Vco1
Vco0
VCO gain (MHz/V)
Pixel clock
frequency range
(MHz)
10 to 20
20 to 40
40 to 85
85 to 170
0
0
1
1
0
1
0
1
12
20
40
70
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| TDA8759HV/8/C1 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO ADC 110MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TDA8759HV/8/C1,551 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| TDA8759HV/8/C1,557 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3X8-BITS VIDEO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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