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参数资料
| 型号： | LTC2268IUJ-14#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 125MSPS DUAL 40QFN |
| 标准包装： | 2,000 |
| 位数： | 14 |
| 采样率（每秒）： | 125M |
| 数据接口： | Serial LVDS |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 364mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN（6x6） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 Differential; 2 Single-Ended |
| 配用： | DC1371A-ND - BOARD USB DATA ACQUISITION HS |
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LTC2268-14/
LTC2267-14/LTC2266-14
19
22687614fa
CONVERTER OPERATION
The LTC2268-14/LTC2267-14/LTC2266-14 are low power,
2-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, or single-ended for lower power consumption.
To minimize the number of data lines the digital outputs
are serial LVDS. 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.
applicaTions inForMaTion
ANALOG INPUT
The analog inputs are differential CMOS sample-and-hold
circuits(Figure2).Theinputsshouldbedrivendifferentially
around a common mode voltage set by the VCM1 or VCM2
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.
The two channels are simultaneously sampled by a shared
encode circuit (Figure 2).
INPUT DRIVE CIRCUITS
Input filtering
If possible, there should be an RC lowpass filter right at
the analog inputs. This lowpass filter isolates the drive
circuitry from the A/D sample-and-hold switching, and
alsolimitswidebandnoisefromthedrivecircuitry.Figure 3
shows an example of an input RC filter. The RC component
values should be chosen based on the application’s input
frequency.
Figure 2. Equivalent Input Circuit. Only One
of the Two Analog Channels is Shown
Figure 3. Analog Input Circuit Using a Transformer.
Recommended for Input Frequencies from 5MHz to 70MHz
CSAMPLE
3.5pF
RON
25
RON
25
VDD
LTC2268-14
AIN+
226814 F02
CSAMPLE
3.5pF
VDD
AIN–
ENC–
ENC+
1.2V
10k
1.2V
10k
CPARASITIC
1.8pF
CPARASITIC
1.8pF
10
25
50
0.1F
AIN+
AIN–
12pF
0.1F
VCM
LTC2268-14
ANALOG
INPUT
0.1F
T1
1:1
T1: MA/COM MABAES0060
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
226814 F03
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2269 | 制造商:LINER 制造商全称:Linear Technology 功能描述:16-Bit, 20Msps Low Noise ADC |
| LTC2269CUK#PBF | 制造商:Linear Technology 功能描述:ADC Single 20Msps 16-bit Parallel/Serial (SPI)/LVDS 48-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16BIT 20MSPS 48-QFN 制造商:Linear Technology 功能描述:ADC 16BIT 1.8V 20MSPS 48QF 制造商:Linear Technology 功能描述:ADC, 16BIT, 1.8V, 20MSPS, 48QFN 制造商:Linear Technology 功能描述:ADC, 16BIT, 20MSPS, PARALLEL, SERIAL, QFN-48; Resolution (Bits):16bit; Sampling Rate:20MSPS; Supply Voltage Type:Single; Supply Voltage Min:1.7V; Supply Voltage Max:1.9V; Supply Current:48.9mA; Digital IC Case Style:QFN; DNL:0.2LSB ;RoHS Compliant: Yes |
| LTC2269CUK#TRPBF | 制造商:Linear Technology 功能描述:ADC Single 20Msps 16-bit Parallel/Serial (SPI)/LVDS 48-Pin QFN EP T/R 制造商:Linear Technology 功能描述:IC ADC 16BIT 20MSPS 48-QFN |
| LTC2269IUK#PBF | 制造商:Linear Technology 功能描述:ADC Single 20Msps 16-bit Parallel/Serial (SPI)/LVDS 48-Pin QFN EP 制造商:Linear Technology 功能描述:IC ADC 16BIT 20MSPS 48-QFN 制造商:Linear Technology 功能描述:ADC 16BIT 1.8V 20MSPS 48QF 制造商:Linear Technology 功能描述:ADC, 16BIT, 1.8V, 20MSPS, 48QFN 制造商:Linear Technology 功能描述:ADC, 16BIT, 20MSPS, PARALLEL, SERIAL, QFN-48; Resolution (Bits):16bit; Sampling Rate:20MSPS; Supply Voltage Type:Single; Supply Voltage Min:1.7V; Supply Voltage Max:1.9V; Supply Current:48.9mA; Digital IC Case Style:QFN; DNL:0.2LSB ;RoHS Compliant: Yes |
| LTC2269IUK#TRPBF | 制造商:Linear Technology 功能描述:ADC Single 20Msps 16-bit Parallel/Serial (SPI)/LVDS 48-Pin QFN EP T/R 制造商:Linear Technology 功能描述:IC ADC 16BIT 20MSPS 48-QFN |
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