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ZNBG4000 ZNBG4001
ZNBG6000 ZNBG6001
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 ZNBG4000/1 contains 4 such
stages, the ZNBG6000/1 contains 6. 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 ZNBG4000/6000 this is nominally
2.2 volts whilst the ZNBG4001/6001 provides nominally 2 volts.
The drain current taken by the FET is monitored by the low value resistor I D 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 . Both ZNBG devices have the facility to program
different drain currents into selected FETs. Two R CAL inputs are provided. For the ZNBG4000,
resistor R CAL1 sets the drain current of FETs 1 and 2, resistor R CAL2 sets the drain current of FETs
3 and 4. For the ZNBG6000, resistor R CAL1 sets the drain current of FETs 1 and 4, resistor R CAL2
sets the drain current of FETs 2, 3, 5 and 6.
Since the FET is a depletion mode transistor, it is usually 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 .
4-141
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相关代理商/技术参数
ZNBG4001Q16TC 功能描述:接口 - 专用 4BIAS GENERATOR 2.0V 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
ZNBG4003 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:4 STAGE FET LNA BIAS CONTROLLER
ZNBG4003JA16TC 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:4 STAGE FET LNA BIAS CONTROLLER
ZNBG4115Q20TC 制造商:Diodes Incorporated 功能描述:IC
ZNBG4210Q24 制造商:未知厂家 制造商全称:未知厂家 功能描述:
ZNBG4210Q24TC 制造商:Diodes Incorporated 功能描述:4 BIAS+TONE+H/V SWITCH(-0V GATE) VD=2.2V - Tape and Reel
ZNBG5116Q24TC 功能描述:MOSFET 7BIAS TONE H/V SWTVE 2.0V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
ZNBG6000 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER