參數資料
型號： WM8196
廠商： Wolfson Microelectronics
英文描述： (8+8)BIT OUTPUT 16-BIT CIS/CCD AFE/DIGITISER
中文描述： （8）位輸出16位獨聯體/防治荒漠化公約AFE的/數字轉換器
文件頁數： 15/30頁
文件大?。?/td> 366K
代理商： WM8196
WM8196
Production Data
w
PD Rev 4.1 July 2005
15
If RLCEXT = 0, V
VRLC
is the output from the internal RLC DAC.
V
VRLC
=
(V
RLCSTEP
RLCV[3:0]) + V
RLCBOT
................................. Eqn. 3
V
RLCSTEP
is the step size of the RLC DAC and V
RLCBOT
is the minimum output of the RLC DAC.
OFFSET DAC BLOCK: OFFSET (BLACK-LEVEL) ADJUST
The resultant signal
V
1
is added to the Offset DAC output.
V
2
=
V
1
+ {260mV
(DAC[7:0]-127.5) } / 127.5 ..................... Eqn. 4
PGA NODE: GAIN ADJUST
The signal is then multiplied by the PGA gain,
V
3
=
V
2
208/(283- PGA[7:0]) .............................................. Eqn. 5
ADC BLOCK: ANALOGUE-DIGITAL CONVERSION
The analogue signal is then converted to a 16-bit unsigned number, with input range configured by
PGAFS[1:0].
D
1
[15:0] = INT{ (
V
3
/V
FS
)
65535} + 32767 PGAFS[1:0] = 00 or 01 ...... Eqn. 6
D
1
[15:0] = INT{ (
V
3
/V
FS
)
65535}
PGAFS[1:0] = 11 ............... Eqn. 7
D
1
[15:0] = INT{ (
V
3
/V
FS
)
65535} + 65535 PGAFS[1:0] = 10 ............... Eqn. 8
where the ADC full-scale range, V
FS
= 3V
OUTPUT INVERT BLOCK: POLARITY ADJUST
The polarity of the digital output may be inverted by control bit INVOP.
D
2
[15:0] =
D
1
[15:0]
(INVOP = 0) ...................... Eqn. 9
D
2
[15:0] = 65535 –
D
1
[15:0]
(INVOP = 1) ...................... Eqn. 10
OUTPUT FORMATS
The digital data output from the ADC is available to the user in 8 or 4-bit wide multiplexed formats by
setting control bit MUXOP[1:0]. Latency of valid output data with respect to VSMP is programmable
by writing to control bits DEL[1:0]. The latency for each mode is shown in the Operating Mode Timing
Diagrams section.
Figure 12 shows the output data formats for Modes 1 – 2 and 4 – 6. Figure 13 shows the output data
formats for Mode 3. Table 1 summarises the output data obtained for each format.
MCLK
4+4+4+4-BIT
OUTPUT
A
B
A
B
C
D
8+8-BIT
OUTPUT
MCLK
4+4+4+4-BIT
OUTPUT
A
B
8+8-BIT
OUTPUT
A B
C D
A B
Figure 12 Output Data Formats
(Modes 1
2, 4
6)
Figure 13 Output Data Formats
(Mode 3)
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相關代理商/技術參數
參數描述
WM8196_07 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:(8 + 8) Bit Output 16-bit CIS/CCD AFE/Digitiser
WM8196SCDS 功能描述:模數轉換器 - ADC 16-Bit 12MSPS 3-Channel AFE RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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
WM8196SCDS/R 功能描述:模數轉換器 - ADC 16-Bit 12MSPS 3-Channel AFE RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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
WM8196SCDS/RV 功能描述:模數轉換器 - ADC 16-Bit 12MSPS 3-Channel AFE RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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
WM8196SCDS/V 功能描述:模數轉換器 - ADC 16-Bit 12MSPS 3-Channel AFE RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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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