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參數(shù)資料
| 型號： | 1B22AN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Programmable, Isolated Voltage-to-Current Converter |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDIP12 |
| 封裝： | 1 X 2.100 INCH, 0.350 INCH HEIGHT, PLASTIC, DIP-38/12 |
| 文件頁數(shù)： | 4/4頁 |
| 文件大小： | 232K |
| 代理商： | 1B22AN |
1B22
REV. B
–
4
–
C
–
2
–
3
P
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
=
2
R
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 Converter
–
Isolated 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 1B31 | Wide Bandwidth Strain Gage Signal Conditioner |
| 1B31AN | Wide Bandwidth Strain Gage Signal Conditioner |
| 1B31SD | Wide Bandwidth Strain Gage Signal Conditioner |
| 1B32 | Bridge Transducer Signal Conditioner |
| 1B32AN | Bridge Transducer Signal Conditioner |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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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