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參數資料
| 型號： | REF195ESZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Precision Micropower, Low Dropout Voltage References |
| 中文描述： | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, PDSO8 |
| 封裝： | ROHS COMPLIANT, MS-012AA, SOIC-8 |
| 文件頁數： | 24/28頁 |
| 文件大?。?/td> | 407K |
| 代理商： | REF195ESZ-REEL |
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REF19x Series
For V
S
levels lower than the lower threshold, U3 output is low;
thus, U2 and Q1 are off while U1 is on. For V
S
levels higher
than the upper threshold, the situation reverses, with U1 off and
both U2 and Q1 on. In the interest of battery power
conservation, all of the comparison switching circuitry is
powered from V
S
and is arranged so that when V
S
fails, the
default output comes from U1.
For the R1 to R3 values, as shown in Figure 30, lower/upper V
S
switching thresholds are approximately 5.5 V and 6 V respectively.
These can be changed to suit other V
S
supplies, as can the REF19x
devices used for U1 and U2, over a range of 2.5 V to5 V of output.
U3 can operate down to a V
S
of 3.3 V, which is generally
compatible with all REF19x family devices.
LOW POWER, STRAIN GAGE CIRCUIT
As shown in Figure 31, the REF19x family of references can be
used in conjunction with low supply voltage operational amplifiers,
such as the OP492 or the OP283, in a self-contained strain gage
circuit in which the REF195 is used as the core. Other
references can be easily accommodated by changing circuit
element values. The references play a dual role, first as the
voltage regulator to provide the supply voltage requirements of
the strain gage and the operational amplifiers, and second as
a precision voltage reference for the current source used to
stimulate the bridge. A distinct feature of the circuit is that it
can be remotely controlled on or off by digital means via
the SLEEP pin.
Rev. I | Page 24 of 28
500
0.1%
57k
1%
0.1μF
10k
1%
0.1μF
1/4
OP492
–
11
10μF
REF195
2.21k
20k
1%
10k
1%
20k
1%
20k
1%
20k
1%
0.01μF
10μF
100
OUTPUT
2N2222
+
1μF
+
6
2
4
+
1
4
2
3
1/4
OP492
+
–
7
5
6
1/4
OP492
+
10k
–
14
12
13
1/4
OP492
+
–
8
10
9
1%
0
Figure 31. A Low Power, Strain Gage Circuit
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相關代理商/技術參數 |
參數描述 |
|---|---|
| REF195FP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage Reference |
| REF195FS | 功能描述:IC VREF SERIES PREC 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:REF19 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:5V 容差:±0.5% 溫度系數:100ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:80µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應商設備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| REF195FS3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:REF19x Series: Precision Micropower. Low Dropout. Low Voltage References Data Sheet (Rev. E. 1/03) |
| REF195FS-REEL | 功能描述:IC VREF SERIES PREC 5V 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:REF19 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:5V 容差:±0.5% 溫度系數:100ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:80µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:TO-236-3，SC-59，SOT-23-3 供應商設備封裝:SOT-23-3 包裝:帶卷 (TR) 其它名稱:LM4040CIM3-5.0MLTRLM4040CIM3-5.0MLTR-ND |
| REF195FSZ | 功能描述:IC VREF SERIES PREC 5V 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電壓基準 系列:REF19 標準包裝:3,000 系列:- 基準類型:旁路，精度 輸出電壓:3V 容差:±0.5% 溫度系數:100ppm/°C 輸入電壓:- 通道數:1 電流 - 陰極:82µA 電流 - 靜態(tài):- 電流 - 輸出:15mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-TSSOP（5 引線），SC-88A，SOT-353 供應商設備封裝:SC-70-5 包裝:帶卷 (TR) 其它名稱:296-20888-2 |
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