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| 型号： | LTC6601IUF-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/40页 |
| 文件大小： | 0K |
| 描述： | IC DRVR FILTER/ADC LN 20-QFN |
| 标准包装： | 2,500 |
| 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： | 带卷 (TR) |
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LTC6601-1
21
66011f
APPLICATIONS INFORMATION
INTERFACING THE LTC6601 TO ADC CONVERTERS
The LTC6601’s rail-to-rail differential output and adjustable
output common mode voltage make the LTC6601 ideal
for interfacing to low voltage, single supply, differential
input ADCs. The sampling process of ADCs creates a
sampling transient that is caused by the switching-in
of the ADC sampling capacitor. The switching-in of this
sampling capacitor momentarily “shorts” the output of the
amplier as charge is transferred between amplier and
sampling capacitor. The amplier must recover and settle
from this load transient before this acquisition period has
ended, for a valid representation of the input signal. The
LTC6601 will settle much more quickly from these peri-
odic load impulses than it does from a 2V input step, but
it is a good idea to add an RC network after the outputs
of the LTC6601 to decouple the sampling transient of the
ADC (See Figure 6). The capacitance of the decoupling
network serves to provide the bulk of the charge during
the sampling process, while the two resistors of the lter
network are used to dampen and attenuate any transient
induced by the ADC. The ADC’s sampling bandwidth will
often be much greater than that of the LTC6601, so hav-
ing this discrete RC lter will give the additional benet
of band limiting broadband output noise.
The selection of the RC time constant is trial and error
for a given ADC, but the following guidelines are recom-
mended. Choose an RC pole frequency greater than the
cutoff frequency of the LTC6601. 80MHz RC lters are
good for ltering broadband noise. Lower frequency RC
lters improve SNR at the expense of settling time. The
resistors in the decoupling network should be at least 25Ω.
Too much resistance in the decoupling network leaves
insufcient settling time and will create a voltage divider
between the dynamic input impedance of the ADC and the
decoupling resistors. Using insufcient resistance might
prevent proper dampening of the load transient caused by
the sampling process, and prolong the time required for
settling. In 16-bit applications, this will typically require
a minimum of 11 RC time constants. It is recommended
that the capacitor is chosen with low dielectric absorption
(such as a C0G multilayer ceramic capacitor).
+
–
0.1μF
VOUT
–
VOUT
+
10nF
BIAS
1μF
C1
C2
3V
R
VOCM
66011 F06
C1
t = R (C1 + 2 C2)
2.2μF
1μF
3.3V
D15
D0
VIN
+
–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
AIN
+
AIN
–
VCM
GND
CONTROL
LTC6601-1
Figure 6. Interfacing the LTC6601 to A/D Converters
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6601IUF-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 |
| LTC6601IUF-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) |
| LTC6601IUF-2#PBF | 制造商:Linear Technology 功能描述:SC-Filters/Active RCLow Power Low Disto |
| LTC6601IUF-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) |
| LTC6601IUF-2PBF | 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 |
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