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| 型号： | MAX1474AXT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/8页 |
| 文件大小： | 0K |
| 描述： | IC ELECTRONIC CAPACITOR SC70-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 电子微调电容器 |
| 应用： | 无匙门禁系统，家庭自动化，无线音频/视频 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP，SC-88，SOT-363 |
| 供应商设备封装： | SC-70-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 1422 (CN2011-ZH PDF) |
| 其它名称： | MAX1474AXT+TDKR |
MAX1474
Detailed Description
The MAX1474 consists of a binary-weighted array of
capacitors that can be switched in and out of parallel to
provide 32 monotonic steps. The switches implement-
ed allow the DC bias of either terminal of the capacitor
to be anywhere from ground to the supply voltage.
There is no inherent polarity. The signal swing range is
limited to 300mV above VDD and 300mV below VSS.
Therefore, if a large-signal swing range is desired, care
must be taken to bias the terminal(s) requiring high
swing capability near midsupply.
If the capacitance is measured differentially from one
terminal to the other, the greatest min/max ratio of the
binary array can be realized, allowing tuning from
0.42pF to 10.9pF in 0.34pF steps. If one terminal is
grounded, and the capacitance is measured to ground,
the parasitics inherent in the package will become
lumped with the switched array, allowing tuning from
6.4pF to 13.3pF in 0.22pF steps. When using the
MAX1474, it is recommended for optimal performance
to connect the CM terminal to the lowest impedance
node (i.e., ground or supply if possible) and CP to the
higher impedance node (i.e., the resonant node in a
ground-referenced LC tank circuit).
Digital Interface
The digital interface sets the desired capacitance
value. There are only two pins, EN and DAT, required
for this operation. EN is an active-high control signal.
Miniature Electronically Trimmable Capacitor
4
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VDD = +5V, VSS = 0, TA = +25
°C, unless otherwise noted.)
f1
SMITH CHART:
15 DAT PULSES
MAX1474
toc09
f1 = 962MHz
Pin Description
PIN
NAME
FUNCTION
1
CP
Capacitor Pin Connected to High-Impedance Node. See Detailed Description.
2VDD
Positive Supply Pin. Connect a 0.01F capacitor to VSS.
3
EN
Programming Enable Pin. Has an internal 50k
pulldown resistor to VSS.
4
DAT
Programming Data Pin. Has an internal 50k
pulldown resistor to VSS.
5VSS
Negative Supply Pin
6
CM
Capacitor Pin Connected to Low-Impedance Node. See Detailed Description.
f1
SMITH CHART:
31 DAT PULSES
MAX1474
toc10
f1 = 848MHz
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相关代理商/技术参数 |
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| MAX1474CXT | 制造商:Maxim Integrated Products 功能描述:MINIATURE ELECTRONICALLY TRIMMABLE CAPACITOR - Rail/Tube |
| MAX14752 | 制造商:Maxim Integrated Products 功能描述:8-CHANNEL/DUAL 4-CHANNEL 72V ANALOG MUX - Rail/Tube |
| MAX14752EUE+ | 功能描述:多路器开关 IC 8:1 72V Analog Mux RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX14752EUE+T | 功能描述:多路器开关 IC 8:1 72V Analog Mux RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX14753 | 制造商:Maxim Integrated Products 功能描述:8-CHANNEL/DUAL 4-CHANNEL 72V ANALOG MUX - Rail/Tube |
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