- 您现在的位置：买卖IC网 > PDF目录225531 > VRE304C (CIRRUS LOGIC INC) 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 4.5 V, PDSO8 PDF资料下载
参数资料
| 型号： | VRE304C |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 4.5 V, PDSO8 |
| 封装： | SMT-8 |
| 文件页数： | 3/4页 |
| 文件大小： | 516K |
| 代理商： | VRE304C |
P r o d u c t I n n o v a t i o n F r o m
VRE304
VRE304DS
3
2.TYPICalPERFORMaNCECuRVES
Temperature oC
VRE304A
VOUT vs. TEMPERATURE
Temperature oC
VRE304C
QUIESCENT CURRENT VS. TEMP
Temperature oC
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
Output Current (mA)
PSRR VS. FREQUENCY
Frequency (Hz)
3.ThEORYOFOPERaTION
The following discussion refers to the block diagram in Figure 1. A FET current source is used to bias a 6.3 V zener
diode. The zener voltage is divided by the resistor network R1 and R2. This voltage is then applied to the noninvert-
ing input of the operational amplifier which amplifies the voltage to produce a 4.5 V output. The gain is determined
by the resistor networks R3 and R4: G=1 + R4/R3. The 6.3 V zener diode is used because it is the most stable
diode over time and temperature.
The current source provides a closely regulated zener current, which determines the slope of the references’ volt-
age vs. temperature function. By trimming the zener current a lower drift over temperature can be achieved. But
since the voltage vs. temperature function is nonlinear this compensation technique is not well suited for wide tem-
perature ranges.
A nonlinear compensation network of thermistors and resistors is used in the VRE series voltage references. This
proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By adjusting the
slope, a very stable voltage is produced over wide temperature ranges.
This network is less than 2% of the overall network resistance so it has a negligible effect on long term stability.
相关PDF资料 |
PDF描述 |
|---|---|
| VRE350BS | THREE TERM VOLTAGE REFERENCE, PDSO8 |
| VRE350JS | THREE TERM VOLTAGE REFERENCE, PDSO8 |
| VRE410LS | THREE TERM VOLTAGE REFERENCE, PDSO14 |
| VRNB-40A18B | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| VRW150-28A | 1-OUTPUT 150 W AC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| VRE304CD | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| VRE304CS | 功能描述:基准电压& 基准电流 Ref. +4.5V, 0/70C 2ppm RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| VRE304J | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Low Cost Precision Reference |
| VRE304JD | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| VRE304JS | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
发布紧急采购，3分钟左右您将得到回复。