MC145567

更新时间： 2024-11-09 22:58:11

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		PC
页数	文件大小	规格书
20页	345K
描述
PCM Codec-Filter

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MC145567 数据手册

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by MC145554/D

SEMICONDUCTOR TECHNICAL DATA

The MC145554, MC145557, MC145564, and MC145567 are all per channel

PCM Codec–Filters. These devices perform the voice digitization and

reconstruction as well as the band limiting and smoothing required for PCM

systems. They are designed to operate in both synchronous and asynchronous

applications and contain an on–chip precision voltage reference. The

MC145554 (Mu–Law) and MC145557 (A–Law) are general purpose devices

that are offered in 16–pin packages. The MC145564 (Mu–Law) and MC145567

(A–Law), offered in 20–pin packages, add the capability of analog loopback and

push–pull power amplifiers with adjustable gain.

L SUFFIX

CERAMIC PACKAGE

CASE 620

These devices have an input operational amplifier whose output is the input

to the encoder section. The encoder section immediately low–pass filters the

analog signal with an active R–C filter to eliminate very–high–frequency noise

from being modulated down to the pass band by the switched capacitor filter.

From the active R–C filter, the analog signal is converted to a differential signal.

From this point, all analog signal processing is done differentially. This allows

processing of an analog signal that is twice the amplitude allowed by a

single–ended design, which reduces the significance of noise to both the

inverted and non–inverted signal paths. Another advantage of this differential

design is that noise injected via the power supplies is a common–mode signal

that is cancelled when the inverted and non–inverted signals are recombined.

This dramatically improves the power supply rejection ratio.

MC145554/57

P SUFFIX

PLASTIC DIP

CASE 648

MC145554/57

DW SUFFIX

SOG PACKAGE

CASE 751G

MC145554/57

After the differential converter, a differential switched capacitor filter band

passes the analog signal from 200 Hz to 3400 Hz before the signal is digitized

by the differential compressing A/D converter.

The decoder accepts PCM data and expands it using a differential D/A

converter. The output of the D/A is low–pass filtered at 3400 Hz and sinX/X

compensated by a differential switched capacitor filter. The signal is then filtered

by an active R–C filter to eliminate the out–of–band energy of the switched

capacitor filter.

L SUFFIX

CERAMIC PACKAGE

CASE 732

MC145564/67

These PCM Codec–Filters accept both long–frame and short–frame industry

standard clock formats. They also maintain compatibility with Motorola’s family

of TSACs and MC3419/MC34120 SLIC products.

The MC145554/57/64/67 family of PCM Codec–Filters utilizes CMOS due to

its reliable low–power performance and proven capability for complex

analog/digital VLSI functions.

P SUFFIX

PLASTIC DIP

CASE 738

MC145564/67

DW SUFFIX

SOG PACKAGE

CASE 751D

MC145554/57 (16–Pin Package)

•

Fully Differential Analog Circuit Design for Lowest Noise

Performance Specified for Extended Temperature Range of – 40 to + 85°C

Transmit Band–Pass and Receive Low–Pass Filters On–Chip

Active R–C Pre–Filtering and Post–Filtering

Mu–Law Companding MC145554

A–Law Companding MC145557

MC145564/67

On–Chip Precision Voltage Reference (2.5 V)

Typical Power Dissipation of 40 mW, Power Down of 1.0 mW at ± 5 V

MC145564/67 (20–Pin Package) — All of the Features of the MC145554/57 Plus:

•

Mu–Law Companding MC145564

A–Law Companding MC145567

Push–Pull Power Drivers with External Gain Adjust

Analog Loopback

REV 1

9/95 (Replaces ADI1517)

Motorola, Inc. 1995

MOTOROLA

MC145554•MC145557•MC145564•MC145567

12 3 4 5 6 7...20

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与MC145567相关器件

型号	品牌	获取价格	描述	数据表
MC145567DW	MOTOROLA	获取价格	PCM Codec-Filter
MC145567DW	LANSDALE	获取价格	PCM Codec-Filter
MC145567DWR2	MOTOROLA	获取价格	A-LAW, PCM CODEC, PDSO20, PLASTIC, SOP-20
MC145567FP	MOTOROLA	获取价格	PCM Codec, A-Law, 1-Func, PDSO20,
MC145567L	MOTOROLA	获取价格	A-LAW, PCM CODEC, CDIP20, 732-03
MC145567P	LANSDALE	获取价格	PCM Codec-Filter
MC14556B	ONSEMI	获取价格	Dual Binary to 1−of−4 Decoder/Demultiplexer
MC14556BALD	MOTOROLA	获取价格	Decoder/Driver, 4000/14000/40000 Series, Inverted Output, CMOS, CDIP16, 620-09
MC14556BALDS	MOTOROLA	获取价格	Decoder/Driver, 4000/14000/40000 Series, Inverted Output, CMOS, CDIP16, 620-09
MC14556BCL	MOTOROLA	获取价格	Decoder/Driver, 4000/14000/40000 Series, Inverted Output, CMOS, CDIP16, CERAMIC, DIP-16

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