- 您现在的位置：买卖IC网 > PDF目录16815 > VRE204M (Apex Microtechnology)IC VREF SERIES PREC 4.5V 20-CLCC PDF资料下载
参数资料
| 型号： | VRE204M |
| 厂商： | Apex Microtechnology |
| 文件页数： | 3/4页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 4.5V 20-CLCC |
| 标准包装： | 1 |
| 基准类型： | 串联，精度 |
| 输出电压： | 4.5V |
| 容差： | ±890µV |
| 温度系数： | 2ppm/°C |
| 输入电压： | 13.5 V ~ 22 V |
| 通道数： | 1 |
| 电流 - 静态： | 7mA |
| 电流 - 输出： | 10mA |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-LCC |
| 供应商设备封装： | 20-CLCC |
| 包装： | 管件 |
VRE204
2. TYPICAL PERFORMANCE GRAPHS
0.69
-0.69
V OUT vs. TEMPERATURE
Temperature o C
VRE204M
V OUT vs. TEMPERATURE
Temperature o C
VRE204MA
QUIESCENT CURRENT VS. TEMP
Temperature o C
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
Output Current (mA)
PSRR VS. FREQUENCY
Frequency (Hz)
3. THEORY OF OPERATION
The following discussion refers to the block diagram in Figure 1. A FET current source is used to bias a 6.3 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 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 then adjusting
the slope, the VRE204 series produces a very stable voltage 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. By using highly stable
resistors in our network, we produce a voltage reference that also has very good long term stability.
VRE204DS
3
相关PDF资料 |
PDF描述 |
|---|---|
| ATWEBDVK-02VOIP | KIT DEV TCP/IP AT89C51RD2 VOIP |
| A3DDB-1018G | IDC CABLE- AKR10B/AE10G/AKR10B |
| V24C12E150BL3 | CONVERTER MOD DC/DC 12V 150W |
| M2MXH-1006R | IDC CABLE - MDM10H/MC10M/X |
| NRS8030T100MJGJ | INDUCTOR POWER 10UH 3.0A SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| VRE204MA | 功能描述:基准电压& 基准电流 Ref. +4.5V, -55/125C 0.3mV error 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 |
| VRE205 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Precision Surface Mount Reference Supply |
| VRE205_10 | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Precision Voltage Reference |
| VRE205C | 功能描述:基准电压& 基准电流 Ref. +5V, -25/85C 0.4mV error 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 |
| VRE205CA | 功能描述:基准电压& 基准电流 Ref. +5V, -25/85C 0.2mV error 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 |
发布紧急采购，3分钟左右您将得到回复。