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| 型号： | ADG702LBRM-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH SPST 8MSOP |
| 产品培训模块： | Switch Fundamentals |
| 标准包装： | 3,000 |
| 功能： | 开关 |
| 电路： | 1 x SPST- NC |
| 导通状态电阻： | 3 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 1.8 V ~ 5.5 V |
| 电流 - 电源： | 1nA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 带卷 (TR) |
ADG701/ADG702
Rev. C | Page 10 of 12
APPLICATIONS INFORMATION
The ADG701/ADG702 belong to the Analog Devices family
of CMOS switches. This series of general-purpose switches
has improved switching times, lower on resistance, higher
bandwidth, low power consumption, and low leakage currents.
ADG701/ADG702 SUPPLY VOLTAGES
Functionality of the ADG701/ADG702 extends from 1.8 V to
5.5 V single supply, making the parts ideal for battery-powered
instruments, where power efficiency and performance are
important design parameters.
It is important to note that the supply voltage affects the input
signal range, on resistance, and switching times of the part. The
effects of the power supplies can be clearly seen in the Typical
Performance Characteristics and the Specifications sections.
For VDD = 1.8 V operation, RON is typically 40 Ω over the
temperature range.
BANDWIDTH
Figure 18 illustrates the parasitic components that affect the ac
performance of CMOS switches (a box surrounds the switch).
Additional external capacitances further degrade performance by
affecting feedthrough, crosstalk, and system bandwidth.
00039-018
VIN
SD
RON
CDS
CD
CLOAD
RLOAD
VOUT
Figure 18. Switch Represented by Equivalent Parasitic Components
The transfer function that describes the equivalent diagram of
the switch (
see Figure 18) is of the form (A)s, shown in the
following equation:
+
=
1
)
(
1
)
(
)
(
T
ON
DS
ON
T
R
C
R
s
C
R
s
R
s
A
where CT = CLOAD + CD + CDS.
The signal transfer characteristic is dependent on the switch
channel capacitance, CDS. This capacitance creates a frequency
zero in the numerator of the transfer function A(s). Because the
switch on resistance is small, this zero usually occurs at high
frequencies. The bandwidth is a function of the switch output
capacitance combined with CDS and the load capacitance. The
frequency pole corresponding to these capacitances appears in
the denominator of A(s).
The dominant effect of the output capacitance, CD, causes the pole
breakpoint frequency to occur first. To maximize bandwidth, a
switch must have a low input and output capacitance and low
on resistance. The on response vs. frequency for the ADG701/
ADG702 can be seen in Figure 10.
OFF ISOLATION
Off isolation is a measure of the input signal coupled through
an off switch to the switch output. The capacitance, CDS, couples
the input signal to the output load when the switch is off, as
shown in Figure 19.
00039-019
VIN
SD
CDS
CD
CLOAD
RLOAD
VOUT
Figure 19. Off Isolation Is Affected by External Load Resistance and
Capacitance
The larger the value of CDS, the larger the values of feedthrough
produced. Figure 9 illustrates the drop in off isolation as a
function of frequency. From dc to roughly 1 MHz, the switch
shows better than 75 dB isolation. Up to frequencies of 10 MHz,
the off isolation remains better than 55 dB. As the frequency
increases, more of the input signal is coupled through to the
output. Off isolation can be maximized by choosing a switch
with the smallest CDS possible. The values of load resistance and
capacitance also affect off isolation, because they contribute to
the coefficients of the poles and zeros in the transfer function of
the switch when open.
+
=
1
)
)(
(
1
)
(
)
(
T
LOAD
DS
LOAD
T
C
R
s
C
R
s
R
s
A
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| ADG702LBRM-REEL7 | 功能描述:IC SWITCH SPST 8MSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 标准包装:1,000 系列:- 功能:多路复用器 电路:1 x 4:1 导通状态电阻:- 电压电源:双电源 电压 - 电源，单路/双路(±):±5V 电流 - 电源:7mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ADG702LBRMZ | 功能描述:IC SWITCH SPST 8MSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 标准包装:1,000 系列:- 功能:多路复用器 电路:1 x 4:1 导通状态电阻:- 电压电源:双电源 电压 - 电源，单路/双路(±):±5V 电流 - 电源:7mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ADG702LBRMZ-REEL | 功能描述:IC SWITCH SPST 8MSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 标准包装:1,000 系列:- 功能:多路复用器 电路:1 x 4:1 导通状态电阻:- 电压电源:双电源 电压 - 电源，单路/双路(±):±5V 电流 - 电源:7mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ADG702LBRMZ-REEL7 | 功能描述:IC SWITCH SPST 8MSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 标准包装:1,000 系列:- 功能:多路复用器 电路:1 x 4:1 导通状态电阻:- 电压电源:双电源 电压 - 电源，单路/双路(±):±5V 电流 - 电源:7mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ADG702LBRT-REEL | 功能描述:IC SWITCH SPST SOT23-6 RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 标准包装:1,000 系列:- 功能:多路复用器 电路:1 x 4:1 导通状态电阻:- 电压电源:双电源 电压 - 电源，单路/双路(±):±5V 电流 - 电源:7mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
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