Rev. 2.00 4.0 Programmable Gain Amplifier (PGA) The PGA provides gains from 0dB to 36 dB in approxi- mately 0.047 dB steps. The des" />
參數(shù)資料
型號(hào): XRD98L61AIV-F
廠商: Exar Corporation
文件頁數(shù): 10/38頁
文件大?。?/td> 0K
描述: IC CCD DIGITIZER 12BIT 48TQFP
標(biāo)準(zhǔn)包裝: 250
位數(shù): 12
通道數(shù): 1
電壓 - 電源,模擬: 2.7 V ~ 3.6 V
電壓 - 電源,數(shù)字: 2.7 V ~ 3.6 V
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 托盤
XRD98L61
18
Rev. 2.00
4.0 Programmable Gain Amplifier (PGA)
The PGA provides gains from 0dB to 36 dB in approxi-
mately 0.047 dB steps. The desired gain setting is
programmed via the 10 bit gain register in the Serial
Interface.
For gain codes between 0 and 767, the gain can be
calculated by the following equation:
×
=
36
768
]
[
Code
dB
Gain
For gain codes
≥ 768, the gain is fixed at 36 dB. The
gain doubles every 128 codes to simplify DSP algo-
rithms and control.
Gain Code, PGA[9:0]
P
G
A
G
a
in
[d
B
]
0
1
0
2
4
5
1
2
5
6
0
6
7
6
8
12
18
24
30
36
27
9
1
9
2
5
6
8
Figure 7. PGA Gain vs. Gain Code
An example of setting the gain is as follows: If the CCD
input is limited by 800mVpp (CDSVIN) and the ADC full
scale differential input (VID) is 2Vpp, then a minimum
gain is calculated by:
=
CDSV
IN
VID
Gain
20 log
=
0.8
2
20 log
= 8dB
The gain code would be set to 170d for 8dB of PGA
gain.
相關(guān)PDF資料
PDF描述
XRD98L62ACV-F IC CCD DIGITIZER 12BIT 48TQFP
XRD98L63AIV-F IC CCD DIGITIZER 12BIT 48TQFP
XRT71D00IQ-F IC JITTER ATTENUATOR SGL 32TQFP
XRT71D03IV-F IC JITTER ATTENUATOR 3CH 64TQFP
XRT71D04IV IC JITTER ATTENUATOR 4CH 80TQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRD98L61EVAL 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Eval Board for XRD98L61AIV RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
XRD98L61ZEVAL 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Eval Board (Solder) XRD98L61AIV RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
XRD98L62 制造商:EXAR 制造商全稱:EXAR 功能描述:CCD Image Digitizers with CDS, PGA and 12-Bit A/D
XRD98L62ACV 制造商:EXAR 制造商全稱:EXAR 功能描述:CCD Image Digitizers with CDS, PGA and 12-Bit A/D
XRD98L62ACV-F 功能描述:視頻 IC RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel