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参数资料
| 型号： | VRE210MA |
| 厂商： | Apex Microtechnology |
| 文件页数： | 3/4页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 10V 20-CLCC |
| 标准包装： | 1 |
| 基准类型： | 串联，精度 |
| 输出电压： | 10V |
| 容差： | ±800µV |
| 温度系数： | 1ppm/°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 |
VRE210
2. TYPICAL PERFORMANCE CURVES
V OUT vs. TEMPERATURE
0.6
-0.6
Temperature o C
VRE210CA
QUIESCENT CURRENT VS. TEMP
Temperature o C
V OUT vs. TEMPERATURE
1.2
-1.2
Temperature o C
VRE210M
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
Output Current (mA)
1.0
-1.0
V OUT vs. TEMPERATURE
Temperature o C
VRE210MA
PSRR VS. FREQUENCY
Frequency (Hz)
3. THEORY OF OPERATION
The following discussion refers to the block diagram in Figure 1. In operation, approximately 6.3 volts is applied to
the noninverting input of the op amp. The voltage is amplified by the op amp to produce a 10 V output. The gain is
determined by the networks R1 and R2: G=1 + R2/R1. The 6.3V zener diode is used because it is the most stable
diode over time and temperature.
The zener operating current is derived from the regulated output voltage through R3. This feedback arrangement
provides a closely regulated zener current. This current determines the slope of the references’ voltage vs. tempera-
ture 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 temperature ranges.
A nonlinear compensation network of thermistors and resistors that is used in the VRE series voltage references.
This proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By then adjust-
ing the slope, Thaler Corporation 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.
VRE210DS
3
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