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| 型号： | REF192GSZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 25/28页 |
| 文件大小： | 0K |
| 描述： | IC VREF SERIES PREC 2.5V 8-SOIC |
| 设计资源： | Software Configurable 16-Bit Quad-Channel Unipolar/Bipolar Voltage Output Using AD5754 (CN0086) Software Configurable 14-Bit Quad-Channel Unipolar/Bipolar Voltage Output Using AD5734 (CN0087) Software Configurable 12-Bit Quad Channel Unipolar/Bipolar Voltage Output Using AD5724 (CN0088) Software Configurable 16-Bit Dual-Channel Unipolar/Bipolar Voltage Output Using AD5752 (CN0092) Software Configurable 14-Bit Dual-Channel Unipolar/Bipolar Voltage Output Using AD5732 (CN0093) Software Configurable 12-Bit Dual-Channel Unipolar/Bipolar Voltage Output Using AD5722 (CN0094) |
| 标准包装： | 2,500 |
| 系列： | REF19 |
| 基准类型： | 串联，精度 |
| 输出电压： | 2.5V |
| 容差： | ±10mV |
| 温度系数： | 25ppm/°C |
| 输入电压： | 2.6 V ~ 15 V |
| 通道数： | 1 |
| 电流 - 静态： | 15µA |
| 电流 - 输出： | 30mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
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Data Sheet
+V BAT
REF19x Series
+V S
R1
1.1M ?
R3
10M ?
R6
100 ?
Q1
2N3904
C2
0.1μF
3
C1
2
U1
REF195
(SEE TABLE)
4
6
5.000V
3 +
7
6
0.1μF
R2
100k ?
2 –
4
U3
AD820
R4
900k ?
3
2
U2
REF195
(SEE TABLE)
4
6
+ C3
1μF
C4
R5
V S , V BAT
COMMON
0.1μF
100k ?
V OUT
COMMON
Figure 32. Fail-Safe 5 V Reference
For V S levels lower than the lower threshold, the output of U3 is
100 Ω
low, thus U2 and Q1 are off and U1 is on. For V S levels higher
than the upper threshold, the situation reverses, with U1 off and
2
REF195
6
10 μ F
1 μ F
both U2 and Q1 on. In the interest of battery power conserva-
tion, 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.
10 μ F
+
4
+
57k Ω
1%
0.1 μ F
3 +
2 –
For the R1 to R3 values, as shown in Figure 32, lower/upper V S
switching thresholds are approximately 5.5 V and 6 V, respec-
tively. 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 to
0.1 μ F
10k Ω
1%
4
1/4
OP492
11
1
2N2222
5 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
500 Ω
0.1%
As shown in Figure 33, the REF19x family of references can be
10k Ω
1%
0.01 μ F
used in conjunction with low supply voltage operational ampli-
fiers, such as the OP492 or the OP747, 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
2.21k Ω
13 –
1/4
OP492
12 +
10k Ω
1%
14
20k Ω
1%
20k Ω
1%
6 –
1/4
OP492
5 +
7
OUTPUT
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
9 –
1/4
OP492
10 +
8
20k Ω
1%
20k Ω
1%
the SLEEP pin.
Rev. L | Page 25 of 28
Figure 33. Low Power, Strain Gage Circuit
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| REF192GSZ-REEL7 | 功能描述:IC VREF SERIES PREC 2.5V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电压基准 系列:REF19 产品培训模块:Voltage Reference Basics 标准包装:100 系列:- 基准类型:旁路，精度 输出电压:4.096V 容差:±0.075% 温度系数:50ppm/°C 输入电压:- 通道数:1 电流 - 阴极:1µA 电流 - 静态:- 电流 - 输出:10mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:管件 |
| REF193 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision Micropower, Low Dropout, Voltage References |
| REF1930AIDDCT | 功能描述:Series Voltage Reference IC ±0.1% 20mA SOT-23-5 Thin, TSOT-23-5 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 参考类型:系列 输出类型:固定 电压 - 输出（最小值/固定）:3V 电压 - 输出（最大值）:- 电流 - 输出:20mA 容差:±0.1% 温度系数:25ppm/°C 噪声 - 0.1Hz 至 10Hz:12ppmp-p 噪声 - 10Hz 至 10Hz:- 电压 - 输入:3.02 V ~ 5.5 V 电流 - 电源:460μA 电流 - 阴极:- 工作温度:-55°C ~ 150°C（TJ） 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商器件封装:SOT-5 标准包装:1 |
| REF1933AIDDCT | 功能描述:Series Voltage Reference IC ±0.1% 20mA SOT-23-5 Thin, TSOT-23-5 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 参考类型:系列 输出类型:固定 电压 - 输出（最小值/固定）:3.3V 电压 - 输出（最大值）:- 电流 - 输出:20mA 容差:±0.1% 温度系数:25ppm/°C 噪声 - 0.1Hz 至 10Hz:12ppmp-p 噪声 - 10Hz 至 10Hz:- 电压 - 输入:3.32 V ~ 5.5 V 电流 - 电源:460μA 电流 - 阴极:- 工作温度:-55°C ~ 150°C（TJ） 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商器件封装:SOT-5 标准包装:1 |
| REF193ES | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision Micropower, Low Dropout, Voltage References |
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