Datasheet > AM462

AM462

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
安茂微 - AME		转换器
页数	文件大小	规格书
20页	276K
描述
Industrial V/I Converter and Protector IC

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AM462 数据手册

Industrial V/I Converter and Protector IC

AM462

V_INDAI

8R₀

V_SET

2R0

I_OUT

+ I_SETwith I_SET

(2)

with V_INDAIthe voltage at pin INDAI and V_SETthe voltage at pin SET (V/I converter inputs)¹.

V_REF

R₃

R₄

V_CVREF

C₁

V_S

V_SET

AM462

V_CVSET

R₀

Voltage Reference

OP2

V_BG

T₁

D₁

V_INP

OP1

R₅

I_OUT

R₁

INDAI

R₂

V_OUTAD

Ground

Figure 2: Block diagram of AM462 with external components (3-wire circuit for current output)

3. The AM462 reference voltage source enables voltage to be supplied to external components

(such as sensors, microprocessors, etc.). The reference voltage value V_REFcan be set via pin 13

VSET. If pin VSET is not connected, V_REF= 5V; if VSET is switched to ground, V_REF= 10V.

Values between the above can be set if two external resistors are used (inserted between pin

VREF and pin VSET and between pin VSET and GND; see Figure 2).

External (ceramic) capacitor C₁at pin VREF stabilizes the reference voltage. It must be

connected even if the voltage reference is not in use.

4. The additional operational amplifier stage OP2 can be used as a current or voltage source to

supply external components. OP2's positive input is connected internally to voltage V_BGso that

the output current or output voltage can be set across a wide range using one or two external

resistors.

The construction of the V/I converter is such that output current I_OUTis largely independent of the current

amplification β_Fof external transistor T₁. Production-specific variations in the current amplification of the transistors

used are compensated for internally by the V/I converter.

analog microelectronics

December2006

Analog Microelectronics GmbH

An der Fahrt 13, D – 55124 Mainz

Internet: http://www.analogmicro.de

Phone: +49 (0)6131/91 073 - 0

Fax: +49 (0)6131/91 073 – 30

Email: info@analogmicro.de

7/20

Rev. 2.4

1...4 5 678 9 10...20

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