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参数资料
| 型号： | MAX6138AEXR30+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC VREF SHUNT PREC 3V SC-70-3 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 基准类型： | 旁路，精度 |
| 输出电压： | 3V |
| 容差： | ±0.1% |
| 温度系数： | 25ppm/°C |
| 通道数： | 1 |
| 电流 - 阴极： | 65µA |
| 电流 - 输出： | 15mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-70，SOT-323 |
| 供应商设备封装： | SC-70-3 |
| 包装： | 标准包装 |
| 产品目录页面： | 1428 (CN2011-ZH PDF) |
| 其它名称： | MAX6138AEXR30+TDKR |
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Pin Description
PIN
1
2
3
NAME
+
-
N.C.
FUNCTION
Positive Terminal of the Shunt Reference
Negative Terminal of the Shunt Reference
No Connection. Leave this pin unconnected or connect to Pin 2.
Detailed Description
The MAX6138 shunt reference uses the bandgap prin-
V S
ciple to produce a stable, accurate voltage. The device
behaves similarly to an ideal zener diode; a fixed volt-
R S
I SHUNT + I LOAD
age is maintained across its output terminals when
biased with 60μA to 15mA of reverse current. The
MAX6138 behaves similarly to a silicon diode when
biased with forward currents up to 10mA.
Figure 3 shows a typical operating circuit. The
MAX6138 is ideal for providing a stable reference from
a high-voltage power supply.
Applications Information
The MAX6138 ’ s internal pass transistor is used to main-
tain a constant output voltage (V SHUNT ) by sinking the
necessary amount of current across a source resistor.
I SHUNT
I LOAD
MAX6138
V R
The source resistance (R S ) is determined from the load
current (I LOAD ) range, supply voltage (V S ) variations,
V SHUNT , and desired quiescent current.
Choose the value of R S when V S is at a minimum and
I LOAD is at a maximum. Maintain a minimum I SHUNT of
60μA at all times. The R S value should be large enough
to keep I SHUNT less than 15mA for proper regulation
when V S is maximum and I LOAD is at a minimum. To
prevent damage to the device, I SHUNT should never
exceed 20mA.
Therefore, the value of R S is bounded by the following
equation:
[V S(MIN) - V R ] / [60μA + I LOAD(MAX) ] > R S >
[V S(MAX ) - V R ] / [20mA + I LOAD(MIN) ]
Choosing a larger resistance minimizes the total power
dissipation in the circuit by reducing the shunt current
(P D(TOTAL) = V S X I SHUNT ). Provide a safety margin to
incorporate the worst-case tolerance of the resistor
used. Ensure that the resistor ’ s power rating is ade-
quate, using the following general power equation:
PD R = I SHUNT ? (V S(MAX) - V SHUNT )
Figure 3. Typical Operating Circuit
Output Capacitance
The MAX6138 does not require an external capacitor
for operational stability and is stable for any output
capacitance.
Temperature Performance
The MAX6138 typically exhibits an output voltage tem-
perature coefficient within ±4ppm/ ° C. The polarity of
the temperature coefficient may be different from one
device to another; some may have positive coefficients,
and others may have negative coefficients.
Chip Information
TRANSISTOR COUNT: 70
PROCESS: BiCMOS
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6138AEXR33 | 制造商:Maxim Integrated Products 功能描述:0.1% 25PPM SC70 SHUNT VOLTAGE REF - Rail/Tube |
| MAX6138AEXR33+ | 制造商:Maxim Integrated Products 功能描述:V-REF PRECISION 3.3V 15MA 3PIN SC-70 - Cut Tape Product |
| MAX6138AEXR33+T | 功能描述:基准电压& 基准电流 .1% 25ppm Shunt Voltage Ref 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 |
| MAX6138AEXR33-T | 功能描述:基准电压& 基准电流 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 |
| MAX6138AEXR41 | 制造商:Maxim Integrated Products 功能描述:0.1% 25PPM SC70 SHUNT VOLTAGE REF - Rail/Tube |
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