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参数资料
| 型号： | TS12A4514PE4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 多路复用及模拟开关 |
| 英文描述： | 1-CHANNEL, SGL POLE SGL THROW SWITCH, PDIP8 |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-8 |
| 文件页数： | 16/18页 |
| 文件大小： | 655K |
| 代理商： | TS12A4514PE4 |
APPLICATION INFORMATION
Power-Supply Considerations
Logic-Level Thresholds
High-Frequency Performance
Test Circuits/Timing Diagrams
TS12A4515
TS12A4514
GND
IN
NO
COM
50
TS12A4514
VOUT is the measured voltage due to charge
transfer error Q when the channel turns off.
Q = DVOUT x CL
TS12A4515
VIN
VOUT
VNO or VNC = 0 V
CL
1000 pF
VIN
VOUT
V+
0 V
www.ti.com ................................................................................................................................................... SCDS193D – AUGUST 2006 – REVISED MARCH 2009
The TS12A4514/TS12A4515 construction is typical of most CMOS analog switches, except that they have only
two supply pins: V+ and GND. V+ and GND drive the internal CMOS switches and set their analog voltage limits.
Reverse ESD-protection diodes are internally connected between each analog-signal pin and both V+ and GND.
One of these diodes conducts if any analog signal exceeds V+ or GND.
Virtually all the analog leakage current comes from the ESD diodes to V+ or GND. Although the ESD diodes on a
given signal pin are identical and, therefore, fairly well balanced, they are reverse biased differently. Each is
biased by either V+ or GND and the analog signal. This means their leakages will vary as the signal varies. The
difference in the two diode leakages to the V+ and GND pins constitutes the analog-signal-path leakage current.
All analog leakage current flows between each pin and one of the supply terminals, not to the other switch
terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity.
There is no connection between the analog-signal paths and V+ or GND.
V+ and GND also power the internal logic and logic-level translators. The logic-level translators convert the logic
levels to switched V+ and GND signals to drive the analog signal gates.
The logic-level thresholds are CMOS/TTL compatible when V+ is 5 V. As V+ is raised, the level threshold
increases slightly. When V+ reaches 12 V, the level threshold is about 3 V – above the TTL-specified high-level
minimum of 2.8 V, but still compatible with CMOS outputs.
CAUTION:
If the user is using the TS12A4514 or TS12A4515 with a V+ supply of 3 V, then
the control input (IN) voltage should not exceed V+, otherwise the output levels
can exceed 3 V and violate the absolute maximum rating, potentially damaging
the device.
In 50-
systems, signal response is reasonably flat up to 250 MHz (see Typical Operating Characteristics).
Above 20 MHz, the on response has several minor peaks that are highly layout dependent. The problem is not in
turning the switch on; it is turning it off. The OFF-state switch acts like a capacitor and passes higher frequencies
with less attenuation. At 10 MHz, OFF isolation is about –45 dB in 50-
systems, decreasing (approximately 20
dB per decade) as frequency increases. Higher circuit impedances also make OFF isolation decrease. OFF
isolation is about 3 dB above that of a bare IC socket, and is due entirely to capacitive coupling.
Figure 1. Charge Injection
Copyright 2006–2009, Texas Instruments Incorporated
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TS12A4515 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW-VOLTAGE, LOW ON-STATE RESISTANCE SPST CMOS ANALOG SWITCHES |
| TS12A4515D | 功能描述:模拟开关 IC Lo-Vltg Lo On-St Resist SPST CMOS RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
| TS12A4515DBVR | 功能描述:模拟开关 IC Lo-Vltg,Lo On-St Res SPST CMOS Ana Sw RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
| TS12A4515DG4 | 功能描述:模拟开关 IC Lo-Vltg Lo On-St Resist SPST CMOS RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
| TS12A4515DR | 功能描述:模拟开关 IC Lo-Vltg Lo On-St Resist SPST CMOS RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
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