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| 型号： | LTC6601CUF-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/40页 |
| 文件大小： | 0K |
| 描述： | IC DRVR FILTER/ADC LN 20-QFN |
| 标准包装： | 91 |
| 频率 - 截止或中心： | 28Mhz |
| 滤波器数： | 3 |
| 滤波器阶数： | 2nd |
| 电源电压： | 2.7 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 管件 |
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LTC6601-1
19
66011f
Likewise, substituting the numbers for a single 5V power
supply, (V+ = 5V, V– = 0V) with VOCM = 2.5V, and R1 = R2
= 100Ω, into the above equation, the input common mode
range (VINCMR) is between the two limits:
0V ≤ VINCM ≤ 4.7V
The output common mode voltage is dened as the aver-
age of the two outputs:
VOUTCM = VOCM =
VOUT+ + VOUT–
2
The VOCM pin sets this average by an internal common
mode feedback loop which internally forces VOUT+ =
–VOUT–. The output common mode range extends from
1.1 V above V– to 1V below V+. The VOCM pin sits in the
middle of a voltage divider which sets the default mid-
supply open circuit potential.
In single supply applications, where the LTC6601 is used
to interface to an ADC, the optimal common mode input
to the ADC is often determined by the ADC’s reference. If
the ADC makes a reference available for setting the input
common mode voltage, it can be directly tied to the VOCM
pin, but must be capable of driving the input impedance of
the VOCM pin (RVOCM). This impedance can be assumed
to be connected to a mid-supply potential. If an external
reference drives the VOCM pin, it should still be bypassed
with a high quality 0.01μF or higher capacitor to a low
impedance ground plane to lter any thermal noise and
to prevent common mode signals on this pin from being
inadvertently converted to differential signals.
Noise Considerations
When comparing the LTC6601 noise to other ampliers,
be sure to compare similar specications. Competing
devices often specify noise referred to the inputs of the
amplier. The input referred voltage noise of the LTC6601-1
is 2.1nV/√Hz. This level is one of the lowest available for
ampliers in this speed and power range.
In addition to the noise generated by the amplier, the
surrounding feedback resistors also contribute noise. A
noise model is shown in Figure 5. The output spot noise
generated by both the amplier and the feedback compo-
nents is governed by the equation:
APPLICATIONS INFORMATION
eno = eni 1+
R2
R1
2
+ 2 In2 R22 +R32 1+
R2
R1
2
+ 2 enR1
R2
R1
2
+ 2enR3 1+
R2
R1
2
+ 2enR22
Substituting the equation for Johnson noise of a resistor (enR2 = 4kTR), and simplifying:
eno = eni 1+
R2
R1
2
+ 2 In2 R22 +R32 1+
R2
R1
2
+ 8k T R2 1+ R2
R1
+R3 1+ R2
R1
2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6601CUF-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise, 0.5% Tolerance, 5MHz to 28MHz, Pin Confi gurable Filter/ADC Driver |
| LTC6601CUF-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Power, Low Distortion, 5MHz to 27MHz, Pin Confi gurable Filter/ADC Driver |
| LTC6601CUF-2#PBF | 功能描述:IC DRVR FILTER/ADC LN 20-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
| LTC6601CUF-2#PBF | 制造商:Linear Technology 功能描述:SC-Filters/Active RCLow Power Low Disto |
| LTC6601CUF-2#TRPBF | 功能描述:IC FILTER/ADC DVR LP LD 20-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 滤波器 - 有源 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 滤波器类型:连续时间，带通低通 频率 - 截止或中心:150kHz 滤波器数:4 滤波器阶数:8th 电源电压:4.74 V ~ 11 V，±2.37 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) |
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