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MN2310H/B

Precision, Low-Noise JFET Instrumentation Amplifiers

Micro Networks 

MN2310 Series

Low Noise JFET

Instrumentation Amplifiers

PIN 1

Pin Designations

1. Cext/RAgain

2. Cext

3. Ground

4. NC

5. NC

6. NC

7. NC

8. NC

9. NC

10. NC

11. NC

12. NC

13. NC

14. -V Bypass

15. NC

16. NC

17. NC

18. -V Bypass

19. NC

20. -V Supply

21. NC

22. NC

23. Voltage Out (+)

24. Voltage Out (-)

25. +V Supply

26. NC

27. +V Bypass

28. NC

29. NC

30. NC

31. NC

32. NC

33. NC

34. NC

35. NC

36. R9 Gain

37. NC

38. NC

39. NC

40. Input (+)

41. Input (-)

42. NC

43. Shield (Lid)

44. Shield (Sub.)

Input Protection - Protecting the input stage of a

low noise amplifier from destructive input transients

is a complex problem. Normal diodes and MOV’s

present loading problems when placed across the

input terminals. Biased diodes (diodes connected

from the input leads to V+ and V- in a reversed

condition) contribute to input noise current. Input

series resistors used in a series current limiting

circuit seriously add to the noise voltage (En) of most

low noise amplifiers.

The MN2310 Series Low Noise Amplifiers contain

a unique input protection circuit which has been

carefully designed to protect the amplifier without

causing unwanted noise performance deterioration.

Standard product devices are protected from

current pulses of up to 2A-seconds from kilovolt

transients (open circuit).

1/f noise for low audio and subaudio applications

- Highly sensitive instruments, such as seismographs

and radiation detectors use the low audio and

sub-audio frequency bands. In these applications,

amplifiers are required to have exceptionally low

1/f noise characteristics. Unfortunately, all semicon-

ductors exhibit some degree of 1/f noise depending

on the type of semiconductor device and process.

1/f noise is typically quantified by identifying the

break frequency f/1 where the noise density has risen

3dB above the mid band value.

324 Clark St., Worcester, MA 01606

Tel. (508) 852-5400 • FAX (508) 853-8296

E-Mail – sales@mnc.com

Web Site – http://www.mnc.com

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