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| 型号： | 1B22AN |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/4页 |
| 文件大小： | 224K |
| 描述： | IC VOLTAGE CONVERTER PROG DIP |
| 产品变化通告： | Product Change Notice 06/Jul/2009 |
| 标准包装： | 1 |
| 类型： | 电压和电流控制器 |
| 全量程： | ±50ppm/°C |
| 线性： | ±0.02% |
| 安装类型： | 通孔 |
| 封装/外壳： | 38-DIP（0.800"，20.32mm），12 引线 |
| 供应商设备封装： | 12-DIP |
| 包装： | 散装 |
1B22
REV. B
4
Synchronizing Multiple 1B22s: In applications where mul-
tiple 1B22s are used in close proximity, radiated individual
oscillator frequencies may cause beat frequency related out-
put errors. These errors can be eliminated by driving the SYNC
pins of all the units with a 40 kHz clock circuit at 50% duty
cycle (Figure 5). The SYNC input typically has an input imped-
ance of 150 k&180 pF.
Figure 5. Multiple 1B22s Synchronization
Loop Supply Requirements: The 1B22 design allows flexible
loop supply options. The loop supply voltage required for any
value of load resistance can be calculated from the following
equation:
V
LOOP
=
2R
L
+780
106
This value allows for approximately 10% overrange capability.
The graph in Figure 6 shows the relationship between supply
voltage and load resistance.
Figure 6. Loop Supply vs. Load
APPLICATIONS
Isolated D/A Converter: The 1B22 offers total ground isola-
tion and protection from high voltage transients in interfacing
D/A converters to standard 4 to 20 mA current loops. The D/A
converter, such as the Analog Devices 12-bit AD7245
DACPORT? should be connected for operation on the unipo-
lar 0 V to +10 V output range. This is shown in Figure 7.
Figure 7. D/A ConverterIsolated 4-20 mA Interface
Pressure Transmitter: In Figure 8, the 1B22 is used in a
pressure transmitter application to provide complete input-
output isolation and avoid signal errors due to ground loop cur-
rents. The process pressure is monitored with a strain gage type
pressure transducer interfaced by the Analog Devices 1B32
transducer signal conditioner. The high level voltage output of
the 1B32 is converted to the isolated 4 to 20 mA current for
transmission to a remote recorder or indicator.
Figure 8. Isolated Pressure Transmitter
DACPORT is a registered trademark of Analog Devices, Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 1B22AN | 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR 制造商:Analog Devices 功能描述:IC, VOLTAGE-TO-CURRENT CONVERTER, 12-DIP |
| 1B-23A-B | 制造商:FCI 功能描述: |
| 1B243 | 制造商:Ferraz Shawmut 功能描述: |
| 1B245 | 制造商:Ferraz Shawmut 功能描述: |
| 1B-24A | 制造商:FCI 功能描述:CONN CONT M/M 1 POS/1 POS ST - Tape and Reel |
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