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LM1894 Product Folder

Dynamic Noise Reduction System DNR

Generic P/N 1894

Parametric Table

Temperature Min (deg C)	0000000000.0000
Temperature Max (deg C)	70
Supply Min (Volt)	4.50
Supply Max (Volt)	18

THD (%)	.05
PSRR (dB)	56
User Supply (Volt)	8
SNR (dB)	79

Datasheet

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
LM1894 Dynamic Noise Reduction System DNR	297 Kbytes	3-Apr-02	View Online	Download	Receive via Email
LM1894 Dynamic Noise Reduction System DNR (JAPANESE)	295 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Status

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking

Type

Pins

MSL/Lead-Free Availability

Lead
Time

Qty

SPICE

IBIS

Qty

$US each

LM1894M

SOIC NARROW

Status

Full production

N/A

1K+

$0.91

rail
of
55

NSUZXYTT
LM1894M

6-8 weeks

10000

LM1894MX

SOIC NARROW

Status

Full production

N/A

1K+

$0.91

reel
of
2500

NSUZXYTT
LM1894M

6-8 weeks

14000

LM1894MT

TSSOP

Status

Full production

N/A

1K+

$0.91

rail
of
94

NSZXYTT
LM189
4MT

12-14 weeks

10000

LM1894MTX

TSSOP

Status

Full production

N/A

1K+

$0.91

reel
of
2500

NSZXYTT
LM189
4MT

12-14 weeks

10000

LM1894N

MDIP

Status

Lifetime buy

N/A

1K+

$1.49

rail
of
25

NSUZXYYTT
DNR
LM1894N

6-8 weeks

20000

LM1894 MDC

Unpackaged Die

Full production

N/A

tray
of
N/A

N/A

LM1894 MWC

Wafer

Full production

N/A

wafer jar
of
N/A

N/A

Obsolete Parts

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM1894N	NA	LM1894N	12/01/2004

The LM1894 is a stereo noise reduction circuit for use with audio playback systems. The DNR system is non-complementary, meaning it does not require encoded source material. The system is compatible with virtually all prerecorded tapes and FM broadcasts. Psychoacoustic masking, and an adaptive bandwidth scheme allow the DNR to achieve 10 dB of noise reduction. DNR can save circuit board space and cost because of the few additional components required.

Features

Non-complementary noise reduction, "single ended"
Low cost external components, no critical matching
Compatible with all prerecorded tapes and FM
10 dB effective tape noise reduction CCIR/ARM weighted
Wide supply range, 4.5V to 18V
1 Vrms input overload

Applications

Automotive radio/tape players
Compact portable tape players
Quality HI-FI tape systems
VCR playback noise reduction
Video disc playback noise reduction

Reliability Metrics

Part Number	Process	Sample Size (EFR)	Device Hours	Long Term Failure Rates (FITS)	MTTF
LM1894 MDC	SLM	35000	1500000	3	424108012
LM1894 MWC	SLM	35000	1500000	3	424108012
LM1894M	SLM	35000	1500000	3	424108012
LM1894MT	SLM	35000	1500000	3	424108012
LM1894MTX	SLM	35000	1500000	3	424108012
LM1894MX	SLM	35000	1500000	3	424108012
LM1894N	SLM	35000	1500000	3	424108012

For more information on Reliablitity Metrics, please click here.

Application Notes

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
AN-390: Application Note 390 DNR Applications of the LM1894	304 Kbytes	25-Sep-02	View Online	Download	Receive via Email
AN-386: Application Note 386 A Non-Complementary Audio Noise Reduction System	376 Kbytes	23-Sep-02	View Online	Download	Receive via Email
AN-384: Application Note 384 Audio Noise Reduction and Masking	163 Kbytes	23-Sep-02	View Online	Download	Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 15-Jan-2004]

LM1894 Product Folder