Datasheet > AM460(16DIP)

AM460(16DIP)

更新时间： 2022-12-01 20:14:24

品牌	Logo	应用领域
安茂微 - AME		光电二极管
页数	文件大小	规格书
18页	167K
描述
Analog Circuit, PDIP16

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数据手册

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AM460(16DIP) 数据手册

Industrial Converter and Protector IC

AM460

Typical 2-wire application with an input signal referenced to ground

In 2-wire operation (cf. Figure 8) system supply voltage V_Sis connected up to pin RS+ and pin VCC to pin RS-.

The ground of the IC (pin GND) is connected to the node between resistor R₅and load resistor R_L(current output

I_OUT). IC ground (GND) is not the same as system ground (Ground)!! The output signal is picked up via load re-

sistor R_Lwhich connects current output I_OUTto the system ground.

For output current I_OUTthe following applies according to Equation 3:

G_I

R₁

R₂

V_REF

R₄

I_OUT= V_INP

⋅

+ I_SETwith G_I= G_GAIN=1+

and I_SET

⋅

8R₀

2R₀R₃+ R₄

Example 4:

To obtain a signal of V_INP= 0...1V at the OP1 input the external components are to be dimensioned in such a

way that the output current has a range of 4...20mA.

G_I

G_GAIN

I_OUT=V_INP

⋅

+ I_SET=V_INP

⋅

+ 4mA

8R₀

With R₀= 27Ω Equation 7 produces the following:

R₃

V_REF

−1=

−1≈ 22.15

R₄2R₀I_SET

2⋅27Ω⋅4mA

and thus the following value for the gain to be set:

C₁

R₃

R₄

V_S

C₂

AM460

R₀

Voltage Reference

OP2

V_BG

T₁

D₁

V_INP

OP1

2-wire

connection

OP3

R₅

I_OUT

Single-ended

input voltage

R₁

IC ground: GND

System ground: Ground

Different

potentials!

R₂

R_L

}

GND

Ground

Connections setting unused function blocks to a defined operating point

Figure 8: Typical 2-wire application for input signals referenced to ground

analog microelectronics

April 2003

14/18

1...11 12 131415 16 17 18

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