收藏本站
19
21754314fa
LTC2175-14/
LTC2174-14/LTC2173-14
applicaTions inForMaTion
CONVERTER OPERATION
The LTC2175-14/LTC2174-14/LTC2173-14 are low power,
4-channel, 14-bit, 125Msps/105Msps/80Msps A/D con-
verters that are powered by a single 1.8V supply. The
analog inputs should be driven differentially. The encode
input can be driven differentially for optimal jitter perfor-
mance,orsingle-endedforlowerpowerconsumption.The
digital outputs are serial LVDS to minimize the number
of data lines. Each channel outputs two bits at a time
(2-lane mode). At lower sampling rates there is a one bit
perchanneloption(1-lanemode).Manyadditionalfeatures
canbechosenbyprogrammingthemodecontrolregisters
through a serial SPI port.
ANALOG INPUT
The analog inputs are differential CMOS sample-and-hold
circuits (Figure 2). The inputs should be driven differen-
tially around a common mode voltage set by the VCM12
or VCM34 output pins, which are nominally VDD/2. For the
2V input range, the inputs should swing from VCM – 0.5V
to VCM + 0.5V. There should be 180° phase difference
between the inputs.
Thefourchannelsaresimultaneouslysampledbyashared
encode circuit (Figure 2).
INPUT DRIVE CIRCUITS
Input Filtering
If possible, there should be an RC low pass filter right at
the analog inputs. This lowpass filter isolates the drive
circuitryfromtheA/Dsample-and-holdswitching,andalso
limits wideband noise from the drive circuitry. Figure 3
shows an example of an input RC filter. The RC component
values should be chosen based on the application’s input
frequency.
Transformer Coupled Circuits
Figure 3 shows the analog input being driven by an RF
transformer with a center-tapped secondary. The center
Figure 2. Equivalent Input Circuit. Only One of the Four
Analog Channels is Shown.
CSAMPLE
3.5pF
RON
25
RON
25
VDD
LTC2175-14
AIN+
217514 F02
CSAMPLE
3.5pF
VDD
AIN–
ENC–
ENC+
1.2V
10k
1.2V
10k
CPARASITIC
1.8pF
CPARASITIC
1.8pF
10
Figure 3. Analog Input Circuit Using a Transformer.
Recommended for Input Frequencies from 5MHz to 70MHz.
25
50
0.1F
AIN+
AIN–
12pF
0.1F
VCM
LTC2175-14
ANALOG
INPUT
0.1F
T1
1:1
T1: MA/COM MABAES0060
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
217514 F03
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LTC2202IUK#TRPBF IC ADC 16-BIT 10MSPS 48-QFN
LTC2205IUK-14#PBF IC ADC 14BIT 65MSPS 48-QFN
LTC2207IUK-14#PBF IC ADC 14BIT 105MSPS 48-QFN
LTC2220IUP-1#TRPBF IC ADC 12BIT 185MSPS 64-QFN
LTC2221IUP#TRPBF IC ADC 12-BIT 135MSPS 64-QFN
LTC2222IUK-11#TRPBF IC ADC 11BIT 105MSPS SAMPL 48QFN
LTC2223IUK#TRPBF IC ADC 12BIT 80MSPS SAMPLE 48QFN
LTC2224IUK#TRPBF IC ADC 12BIT 135MSPS SAMPL 48QFN
相关代理商/技术参数
LTC2175IUKG-14PBF 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 125Msps/105Msps/80Msps Low Power Quad ADCs
LTC2175IUKG-14TRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:14-Bit, 125Msps/105Msps/80Msps Low Power Quad ADCs
LTC2180 制造商:LINER 制造商全称:Linear Technology 功能描述:12-Bit, 65Msps/ 40Msps/25Msps Low Power Dual ADCs
LTC2180CUP#PBF 制造商:Linear Technology 功能描述:ADC Dual 25Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16BIT DUAL PAR/SRL 64QFN 制造商:Linear Technology 功能描述:ADC 2CH 16BIT 25MSPS QFN-6 制造商:Linear Technology 功能描述:ADC, 2CH, 16BIT, 25MSPS, QFN-64 制造商:Linear Technology 功能描述:ADC, 2CH, 16BIT, 25MSPS, QFN-64; Resolution (Bits):16bit; Sampling Rate:25MSPS; Supply Voltage Type:Single; Supply Voltage Min:1.7V; Supply Voltage Max:1.9V; Supply Current:43.5mA; Digital IC Case Style:QFN; No. of Pins:64 ;RoHS Compliant: Yes
LTC2180CUP#PBF-ES 制造商:Linear Technology 功能描述:ADC Dual 25Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP
LTC2180CUP#TRPBF 制造商:Linear Technology 功能描述:ADC Dual 25Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP T/R 制造商:Linear Technology 功能描述:IC ADC DUAL 16BIT 25MSPS 64-QFN
LTC2180CUP#TRPBF-ES 制造商:Linear Technology 功能描述:ADC Dual 25Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP T/R
LTC2180IUP#PBF 制造商:Linear Technology 功能描述:ADC Dual 25Msps 16-bit Parallel/Serial (SPI)/LVDS 64-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16BIT DUAL PAR/SRL 64QFN