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| 型号： | ZNBG3211Q20TC |
| 厂商： | Diodes Inc |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC SW 3BIAS TONE H/V 2.2V 20QSOP |
| 标准包装： | 2,500 |
| 功能： | 偏压控制器 |
| RF 型： | LNBs，PMR |
| 次要属性： | 带极性开关和音调检测 |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
ZNBG3210
ZNBG3211
FUNCTIONAL DIAGRAM
FUNCTIONAL DESCRIPTION
The ZNBG devices provide all the bias requirements for external FETs, including the generation
of the negative supply required for gate biasing, from the single supply voltage.The diagram
above shows a single stage from the ZNBG series. The ZNBG3210/11 contains 3 such stages. The
negative rail generator is common to all devices.
The drain voltage of the external FET Q N is set by the ZNBG device to its normal operating voltage.
This is determined by the on board V D Set reference, for the ZNBG3210 this is nominally 2.2 volts
whilst the ZNBG3211 provides nominally 2 volts.
The drain current taken by the FET is monitored by the low value resistor ID Sense. The amplifier
driving the gate of the FET adjusts the gate voltage of Q N so that the drain current taken matches
the current called for by an external resistor R CAL .
Since the FET is a depletion mode transistor, it is often necessary to drive its gate negative with
respect to ground to obtain the required drain current. To provide this capability powered from
a single positive supply, the device includes a low current negative supply generator. This
generator uses an internal oscillator and two external capacitors, C NB and C SUB .
67-8
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相关代理商/技术参数 |
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| ZNBG3310Q16TC | 制造商:Diodes Incorporated 功能描述:LOGIC BIAS GEN AND OSC SWITCH - Tape and Reel |
| ZNBG4000 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:FET BIAS CONTROLLER |
| ZNBG4000Q16 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER |
| ZNBG4000Q16TC | 功能描述:接口 - 专用 FET BIAS CONTROLLER RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
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