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| 型号： | LTC6602IUF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/28页 |
| 文件大小： | 0K |
| 描述： | IC FILTER BANDPASS/LOWPASS 24QFN |
| 标准包装： | 91 |
| 滤波器类型： | 带通 |
| 频率 - 截止或中心： | 300kHz |
| 滤波器数： | 2 |
| 滤波器阶数： | 5th |
| 电源电压： | 2.7 V ~ 3.6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 管件 |
| 产品目录页面： | 1325 (CN2011-ZH PDF) |
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LTC6602
19
6602fc
APPLICATIONS INFORMATION
Figure 10. Distortion vs Common Mode Output Voltage
output common mode voltages of the two channels are
not independent as they are both set by the VOCM pin.
Figure 10 illustrates the distortion versus output common
mode voltage for a 1.5VP-P differential input voltage and a
common mode input voltage that is equal to mid-supply.
Interfacing to the LTC6602
The input and output common mode voltages of the
LTC6602 are independent. The input common mode volt-
age is set by the signal source if DC coupled, as shown in
Figure 11. If the inputs are AC coupled, the input com-
mon mode voltage will pulled to ground by an equivalent
resistance of RCM, shown in Table 4. This does not affect
the filter’s performance as long as the input amplitude
is less than 0.5VP-P . At low filter gain settings, a larger
input voltage swing may be desired. Figure 12 shows two
circuits with AC coupled inputs. In a fixed lowpass cutoff
frequency, connecting resistors between each input and
V+IN will pull the input common mode voltage up, increas-
ing the input signal swing (Figure 12a). The resistance,
RPULL-UP , necessary to set the input common mode
voltage, VICM, to any desired level can be calculated by
RPULLUP =RCM
VSUPPLY
VICM
1
where
RCM = 20k 90MHz/fCLK for LPFI = 0
RCM = 6.7k 90MHz/fCLK for LPFI = 1
For example, if the lowpass cutoff frequency is set to
300kHz, 20k resistors connected between each input
and V+IN will set the input common mode voltage to
mid-supply.
Figure 11. DC Coupled Inputs
Figure 12. AC Coupled Inputs
COMMON MODE OUTPUT VOLTAGE (V)
DISTOR
TION
(dBc)
6602 F10
–20
–60
–50
–40
–30
–70
–80
–90
0.5
2.5
1.5
2.0
1.0
TA = 25°C
fIN = 100kHz
VIN = 1.5VP-P
RBIAS = 54.9k
45kHz-300kHz BPF
GAIN = 0dB
HD3
HD2
V+IN
V+A
V+D
+INA
–INA
VOCM
GND
LTC6602
0.1F
DC COUPLED INPUT
VIN (COMMON MODE) = (VIN+ + VIN–)/2
VOUT (COMMON MODE) = (VOUT+ + VOUT–)/2 = VSUPPLY/2
6602 F11
+OUTA
–OUTA
VSUPPLY
+–
1F
VOUT+
VOUT–
VIN+
VIN–
AC COUPLED INPUT
VIN (COMMON MODE) = VSUPPLY/2
6602 F12a
VSUPPLY
+–
+– 0.1F
0.1F
RPULL-UP
V+IN
V+A
V+D
+INA
–INA
VOCM
GND
LTC6602
0.1F
–OUTA
–OUTB
VSUPPLY
1F
VIN+
VIN–
(a) Fixed Lowpass Cutoff Frequency
6602 F12b
AC COUPLED INPUT
COMMON MODE AT +INA AND –INA
VSUPPLY
+–
+– 0.1F
0.1F
1.87k
V+IN
V+A
V+D
+INA
–INA
VOCM
GND
LTC6602
0.1F
–OUTA
–OUTB
VSUPPLY
1F
VIN+
VIN–
RCM VSUPPLY
2 RCM + 1.87k
=
1.87k
(b) Variable Lowpass Cutoff Frequency
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相关代理商/技术参数 |
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| LTC6602IUF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Matched, High Frequency Bandpass/Lowpass Filters |
| LTC6603 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Adjustable Lowpass Filter |
| LTC6603CUF#PBF | 功能描述:IC FILTER LOWPASS 24-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) |
| LTC6603CUF#TRPBF | 功能描述:IC FILTER LOWPASS 24-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) |
| LTC6603CUF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Adjustable Lowpass Filter |
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