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| 型号： | ADS62P45IRGCT |
| 厂商： | Texas Instruments |
| 文件页数： | 60/78页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT DUAL 125MSPS 64VQFN |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 125M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘 |
| 供应商设备封装： | 64-VQFN 裸露焊盘（9x9） |
| 包装： | 标准包装 |
| 输入数目和类型： | 2 个差分，单极 |
| 其它名称： | 296-23138-6 |
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y(n) +
1
211
[h0
x(n) ) h1
x(n * 1) ) h2
x(n * 2) ) AAA ) h11
x(n * 11) ) h11
x(n * 12) ) AAA ) h1
x(n * 22) ) h0
x(n * 23)]
y(n) +
1
211
x[h0
x(n) ) h1
x(n * 1) ) h2
x(n * 2) ) AAA ) h10
x(n * 10) ) h11
x(n * 11) ) h10
x(n * 12) ) AAA ) h1
x(n * 21) ) h0
x(n * 22)]
SLAS561C
– JULY 2007 – REVISED FEBRUARY 2012
Decimation Filters
ADS62P4X includes option to decimate the ADC output data with in-built low pass, high pass or band pass
filters.
The decimation rate and type of filter can be selected using register bits ( DECIMATION RATE) and (
DECIMATION FILTER TYPE). Decimation rates of 2, 4, or 8 are available and either low pass, high pass or band
pass filters can be selected (see Table 24). By default, the decimation filter is disabled
– use register bit
<FILTER ENABLE> to enable it.
Table 24. Decimation Filter Modes
COMBINATION OF DECIMATION RATES AND FILTER TYPES
<DECIMATIO
<FILTER
<DECIMATION
N FILTER
COEFF
<FILTER
RATE
>
FREQ
SELECT
ENABLE
>
DECIMATION
TYPE OF FILTER
BAND
>
Decimate by 2
In-built low-pass filter (pass band = 0 to Fs/4)
0
1
In-built high-pass filter (pass band = Fs/4 to Fs/2)
0
1
0
1
Decimate by 4
In-built low-pass filter (pass band = 0 to Fs/8)
0
1
0
1
0
1
0
1
0
1
In-built 2nd band-pass filter (pass band = Fs/8 to Fs/4)
0
1
0
1
In-built 3rd band-pass filter (pass band = Fs/4 to 3Fs/8)
In-built last band-pass filter (pass band = 3Fs/8 to Fs/2)
0
1
0
1
Decimate by 2
Custom filter (user programmable coefficients)
0
X
1
Decimate by 4
Custom filter (user programmable coefficients)
0
1
X
1
Decimate by 8
Custom filter (user programmable coefficients)
1
0
X
1
No decimation
Custom filter (user programmable coefficients)
0
1
X
1
0
Decimation Filter Equation
The decimation filter is implemented as 24-tap FIR with symmetrical coefficients (each coefficient is 12-bit
signed). The filter equation is:
(3)
By setting the register bit
<ODD TAP ENABLE> = 1, a 23-tap FIR is implemented:
(4)
In the above equations,
h0, h1
…h11 are 12-bit signed representation of the coefficients,
x(n) is the input data sequence to the filter
y(n) is the filter output sequence
Pre-defined Coefficients
The in-built filter types (low pass, high pass, and band pass) use pre-defined coefficients. The frequency
response of the in-built filters is shown in Figure 102 and Figure 103.
Copyright
2007–2012, Texas Instruments Incorporated
63
Product Folder Link(s): ADS62P45, ADS62P44 ADS62P43, ADS62P42
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相关代理商/技术参数 |
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|---|---|
| ADS62P45IRGCTG4 | 功能描述:模数转换器 - ADC DUAL 14B 125MSPS Para ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS62P45RGC | 制造商:TI 制造商全称:Texas Instruments 功能描述:Dual Channel 14-Bit, 125/105/80/65 MSPS ADC with Parallel CMOS/DDR LVDS outputs |
| ADS62P48 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Dual Channel 14-/12-Bit, 250-/210-MSPS ADC With DDR LVDS and Parallel CMOS Outputs |
| ADS62P48EVM | 功能描述:数据转换 IC 开发工具 ADS62P48 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS62P48IRGC25 | 功能描述:模数转换器 - ADC Dual Channel 14B 210MSPS ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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