參數(shù)資料
型號(hào)： LTC2185CUP#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： 2-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64
封裝： 9 X 9 MM, LEAD FREE, PLASTIC, MO-220WNJR-5, QFN-64
文件頁(yè)數(shù)： 13/36頁(yè)
文件大?。?/td> 799K
代理商： LTC2185CUP#PBF
LTC2185/LTC2184/LTC2183
20
218543f
applicaTions inForMaTion
Figure 5. Recommended Front-End Circuit for Input
Frequencies from 150MHz to 250MHz
Figure 6. Recommended Front-End Circuit for Input
Frequencies Above 250MHz
Amplifier Circuits
Figure 7 shows the analog input being driven by a high
speeddifferentialamplifier.TheoutputoftheamplifierisAC-
coupledtotheA/Dsotheamplifier’soutputcommonmode
voltage can be optimally set to minimize distortion.
At very high frequencies an RF gain block will often have
lower distortion than a differential amplifier. If the gain
block is single-ended, then a transformer circuit (Figure 4
to Figure 6) should convert the signal to differential before
driving the A/D.
Figure 4. Recommended Front-End Circuit for Input
Frequencies from 5MHz to 150MHz
Reference
The LTC2185/LTC2184/LTC2183 has an internal 1.25V
voltage reference. For a 2V input range using the internal
reference, connect SENSE to VDD. For a 1V input range
using the internal reference, connect SENSE to ground.
For a 2V input range with an external reference, apply a
1.25V reference voltage to SENSE (Figure 9).
The input range can be adjusted by applying a voltage to
SENSE that is between 0.625V and 1.30V. The input range
will then be 1.6 VSENSE.
The VREF, REFH and REFL pins should be bypassed as
shown in Figure 8. A low inductance 2.2F interdigitated
capacitor is recommended for the bypass between REFH
and REFL. This type of capacitor is available at a low cost
from multiple suppliers.
25
12
25
50
0.1F
AIN+
AIN–
8.2pF
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T2
T1: MA/COM MABA-007159-000000
T2: COILCRAFT WBC1-1TL
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
218543 F04
LTC2185
25
50
0.1F
AIN+
AIN–
1.8pF
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T2
T1: MA/COM MABA-007159-000000
T2: COILCRAFT WBC1-1TL
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
218543 F05
LTC2185
25
50
0.1F
4.7nH
AIN+
AIN–
0.1F
VCM
ANALOG
INPUT
0.1F
T1: MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
218543 F06
LTC2185
T1
25
200
0.1F
AIN+
AIN–
0.1F
12pF
VCM
LTC2185
218543 F07
–
+
ANALOG
INPUT
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
0.1F
Figure 7. Front-End Circuit Using a High Speed
Differential Amplifier
相關(guān)PDF資料
PDF描述
LTC2185IUP#TRPBF 2-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64
LTC2184CUP#PBF 2-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64
LTC2184IUP#TRPBF 2-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64
LTC2183CUP#TRPBF 2-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64
LTC2184IUP#PBF 2-CH 16-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQCC64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2185IUP#PBF 制造商:Linear Technology 功能描述:ADC Dual 125Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16BIT 125M PAR/SRL 64-QFN
LTC2185IUP#PBF-ES 制造商:Linear Technology 功能描述:ADC Dual 125Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP
LTC2185IUP#TRPBF 制造商:Linear Technology 功能描述:ADC Dual 125Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP T/R 制造商:Linear Technology 功能描述:IC ADC 16BIT 125M PAR/SRL 64-QFN
LTC2185IUP#TRPBF-ES 制造商:Linear Technology 功能描述:ADC Dual 125Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP T/R
LTC2185IUPPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 125/105/80Msps Low Power Dual ADCs
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