LM4040-4.1 데이터 시트보기 (PDF) - Micrel

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LM4040-4.1

Precision Micropower Shunt Voltage Reference

Micrel 

LM4040/4041

I

R2

50A

LM4041-ADJ

VIN

R1

VOUT

D1

1N914

D2

1N914

+

FB

R3

240k

–

R4

240k

Figure 5. Fast Positive Clamp

2.4V + ∆VD1

Micrel, Inc.

LM4041-ADJ

VIN

I

R1

+

FB

–

D1

1N457

R2

510k –

FB

R3 +

510k

VOUT

D2

1N457

LM4041-ADJ

Figure 6. Bidirectional Clamp

±2.4V

LM4041-ADJ

VIN

I

R1

R3

+ 500k

FB

–

D1

1N457

R2

390k FB –

+

R4

390k

VOUT

D2

1N457

LM4041-ADJ

Figure 7. Bidirectional Adjustable Clamp

±18V to ±2.4V

I

LM4041-ADJ

+

FB

–

D1

1N457

VIN

R1

R2

330k

VOUT

D2

1N457

R3

1M FB –

+

R4

330k

LM4041-ADJ

Figure 8. Bidirectional Adjustable Clamp

±2.4 to ±6V

M9999-031805

0 to 20mA

1N4002

D2

R1

390Ω

± 2%

FB

D1* λ

+ 5V

+

LM4041-ADJ

–

R2

1

6 N.C. 470k

2

5

CMOS

N.C. 3

4

4N28

ITHRESHOLD = 1.R214V+4N258AGAIN = 3.2mA

* D1 can be any LED, VF = 1.5V to 2.2V at 3mA. D1 may act as an indicator.

D1 will be on if ITHRESHOLD falls below the threshold current, except with I = O.

Figure 9. Floating Current Detector

14

March 2005

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