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參數(shù)資料
| 型號： | LM9822CCWM1 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM9822 3 Channel 42-Bit Color Scanner Analog Front End |
| 中文描述： | LM9822 3通道42位彩色掃描儀模擬前端 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大?。?/td> | 242K |
| 代理商： | LM9822CCWM1 |
6
www.national.com
Electrical Characteristics
(Continued)
Note 9:
Typicals are at T
J
=T
A
=25°C, f
MCLK
= 12MHz, and represent most likely parametric norm.
Note 10:
Tested limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 11:
Full channel integral non-linearity error is defined as the deviation of the analog value, expressed in LSBs, from the straight line that best fits the actual transfer
function of the AFE.
Note 12:
The sensor’s maximum peak differential signal range is defined as the peak sensor output voltage for a white (full scale) image, with respect to the dark reference
level.
Note 13:
PGA Gain Error is the maximum difference between the measured gain for any PGA code and the ideal gain calculated using:
where
.
Note 14:
Full Channel INL and DNL are tested with CDS disabled, negative signal polarity, DOE = 0, and a single OS input with a gain register setting of 1 (000001b) and
an offset register setting of 0 (000000b).
Note 15:
The digital supply current (ID) does not include the load, data and switching frequency dependent current required to drive the digital output bus on pins (D7 - D0).
The current required to switch the digital data bus can be calculated from: Isw = 2*Nd*Psw*CL*V
D
/t
MCLK
where Nd is total number of data pins, Psw is the probability of
each data bit switching, CL is the capacitive loading on each data pin, V
D
is the digital supply voltage and t
MCLK
is the period of the MCLK input. For most applications, Nd
is 8, Psw is
≈
0.5, and V
D
is 5V, and the switching current can be calculated from: Isw = 40*CL/tMCLK. (With
example, if the capacitive load on each digital output pin (D7 - D0) is 20pF and the period of t
MCLK
is 1/12MHz or 83ns, then the digital switching current would be 9.6mA.
The calculated digital switching current will be drawn through the V
D
pin and should be considered as part of the total power budget for the LM9822.
D
at 3.3V, the equation becomes: Isw = 26.4*CL/t
MCLK
.) For
Note 16:
All specifications quoted in LSBs are based on 12 bit resolution.
V
WHITE
V
REF
V
RFT
CCD Output Signal
CIS Output Signal
V
WHIT
Black Level
GainPGA
V
V
---
G0
X----------------------------
+
=
X
G31
G0
–
(
)
32
31
-----
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM9822CCWMX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Signal Conditioner |
| LM9822CCWMX/NOPB | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| LM9822CCWMX2 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9822 3 Channel 42-Bit Color Scanner Analog Front End |
| LM9823 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9823 3 Channel 48-Bit Color Scanner Analog Front End |
| LM9823A | 制造商:Texas Instruments 功能描述: |
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