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| 型号： | IL611A-3E |
| 厂商： | NVE Corp/Isolation Products |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | ISOLATOR PASSIVE INPUT HS 8SOIC |
| 产品培训模块： | IsoLoop® Isolator |
| 产品目录绘图： | IL611A Circuit |
| 标准包装： | 100 |
| 系列： | IsoLoop® |
| 输入 - 1 侧/2 侧： | 2/0 |
| 通道数： | 2 |
| 电源电压： | 3 V ~ 5.5 V |
| 电压 - 隔离： | 2500Vrms |
| 数据速率： | 10Mbps |
| 传输延迟： | 20ns |
| 输出类型： | 开路漏极 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC（窄型） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 2771 (CN2011-ZH PDF) |
| 其它名称： | 390-1086-5 |
IL600A Series Isolators
Applications Information
IL600-Series Isolators are current mode devices. Changes in current flow into the input coil result in logic state changes at the
output. As shown in Figure 1, output logic high is the zero input current state.
Coil Polarity
Coil Current
mA
5
3.5
1.5
The device switches to logic low if current flows from (In ? ) to (In+).
Note that the designations “In ? “ and “In+” refer to logic levels, not
current flow. Positive values of current mean current flow into
the In ? input.
Input Resistor Selection
Logic State
High
Low
t
Resistors set the coil input current (see Figure 2). There is no limit to
input voltages because there are no semiconductor input structures.
Worst-case logic low threshold current is 8 mA, which is for single-
ended operation with a 3 V supply. In differential mode, where the
input current reverses, the logic low threshold current is 5 mA for the
range of supplies. A “boost capacitor” creates current reversals at edge
t
Figure 1. Typical IL600-Series Transfer Function
transitions, reducing the input logic low threshold current to the
differential level of 5 mA.
Typical Resistor Values
V INH
R1
I COIL
V COIL
3.3 V
5V
0.125W, 5% Resistor
510 Ω
820 Ω
The table shows typical
values for the external
resistor for 5 mA coil
current. The values are
approximate and should be adjusted for temperature or other
85
Input
Coil
V INL
Figure 2. Limiting Resistor Calculation
Equivalent Circuit
application specifics. If the expected temperature range is large, 1%
tolerance resistors may provide additional design margin.
Single-Ended or Differential Input
The IL610, IL611, IL613, and channel 1 of the IL614 can be run with
single-ended or differential inputs (see Test Circuits on page 5). In the
differential mode, current will naturally flow through the coil in both
directions without a boost capacitor, although the capacitor can still be
used for increased external field immunity or improved PWD.
Absolute Maximum recommended coil current in single-ended mode
is 25 mA while differential mode allows up to ±75 mA to flow. The
difference in specifications is due to the risk of electromigration of
coil metals under constant current flow. In single ended mode, long-term DC current flow above 25 mA can cause erosion of the
coil metal. In differential mode, erosion takes place in both directions as each current cycle reverses and has a net effect of zero up
to the absolute maximum current.
An advantage over optocouplers and other high-speed couplers in differential mode is that no reverse bias protection for the input
structure is required for a differential signal.
One of the more common applications is for an isolated Differential Line Receiver. For example, RS-485 can drive an IL610
directly for a fraction of the cost of an isolated RS-485 node (see Illustrative Applications ).
7
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
?NVE Corporation
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