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| 型号： | MAX2769EVKIT+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/23页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX2769 |
| 其它有关文件： | Automotive Product Guide |
| 标准包装： | 1 |
| 类型： | GNSS 接收器 |
| 适用于相关产品： | MAX2769 |
| 已供物品： | 模块 |
MAX2769
Universal GPS Receiver
011
01
010
001
00
000
-7
-6
-5
-4
-3
-2
-1
100
1
2
3
4
5
6
7
10
101
110
11
111
Figure 2. ADC Quantization Levels for 2- and 3-Bit Cases
MSB is output at I1, the second bit is at I0, and the LSB
is at Q1.
Figure 2 illustrates the ADC quantization levels for 2-
and 3-bit cases and also describes the sign/magnitude
data mapping. The variable T = 1 designates the loca-
tion of the magnitude threshold for the 2-bit case.
Fractional Clock Divider
A 12-bit fractional clock divider is located in the clock
path prior to the ADC and can be used to generate the
ADC clock that is a fraction of the reference input
clock. In a fractional divider mode, the instantaneous
division ratio alternates between integer division ratios
to achieve the required fraction. For example, if the
fractional output clock is 4.5 times slower than the input
clock, an average division ratio of 4.5 is achieved
through an equal series of alternating divide-by-4 and
Maxim Integrated
T=1
divide-by-5 periods. The fractional division ratio is
given by:
f OUT / f IN = L COUNT / (4096 - M COUNT + L COUNT )
where L COUNT and M COUNT are the 12-bit counter val-
ues programmed through the serial interface.
DSP Interface
GPS data is output from the ADC as the four logic sig-
nals (bit 0 , bit 1 , bit 2 , and bit 3 ) that represent sign/magni-
tude, unsigned binary, or two’s complement binary data
in the I (bit 0 and bit 1 ) and Q (bit 2 and bit 3 ) channels. The
resolution of the ADC can be set up to 3 bits per chan-
nel. For example, the 2-bit I and Q data in sign/magni-
tude format is mapped as follows: bit 0 = I SIGN , bit 1 =
I MAG , bit 2 = Q SIGN , and bit 3 = Q MAG . The data can be
serialized in 16-bit segments of bit 0 , followed by bit 1 ,
bit 2 , and bit 3 . The number of bits to be serialized is con-
trolled by the bits STRMBITS in the Configuration 3 regis-
13
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相关代理商/技术参数 |
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| MAX2769EVKIT+ | 功能描述:GPS开发工具 MAX2769 Eval Kit RoHS:否 制造商:STMicroelectronics 产品:Evaluation Boards 工具用于评估:IT600, STM32F20x 频率:1.575 GHz 工作电源电压:1.8 V 接口类型:Wireless |
| MAX-277 | 制造商:MDE 制造商全称:MDE Semiconductor, Inc. 功能描述:HIGH CURRENT TRANSIENT VOLTAGE SUPPRESSOR |
| MAX280C/D | 功能描述:有源滤波器 RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX280CPA | 功能描述:有源滤波器 RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX280CPA+ | 功能描述:有源滤波器 5th-Order Zero-Error Butterworth RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
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