Datasheet > TMC2242BR2C2

TMC2242BR2C2

更新时间： 2024-11-17 22:39:39

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		外围集成电路 LTE 时钟
页数	文件大小	规格书
16页	88K
描述
Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz

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TMC2242BR2C2 数据手册

www.fairchildsemi.com

TMC2 2 4 2 A/TMC2 2 4 2 B

Dig it a l Ha lf-Ba n d In t e rp o la t in g /De c im a t in g Filt e r

1 2 -b it In /1 6 -b it Ou t , 6 0 MHz

Features

• TMC2242A and TMC2242B are pin-compatible with

TMC2242

• Single +5 Volt power supply operation

• Small 44-Lead PLCC and 44-Lead MQFP

• User selectable interpolate gain, -6 dB or 0 dB (2242B)

• 30, 40 and 60 MHz speed grades

• User selectable 2:1 decimation, 1:2 interpolation, and

equal-rate ﬁlter modes

Applications

• Low-cost video ﬁltering

• Chrominance bandwidth limiter

• Simple, inexpensive video D/A post-ﬁlters

• Reduced cost and complexity for A/D anti-aliasing ﬁlters

• High-performance digital low-pass ﬁlters

• Digital waveform reconstruction post-ﬁltering

• Telecommunications

• Passband ripple < ±0.01 dB

• Stopband rejection 59.4 dB from 0.28 to 0.50 x f

• Cascading two TMC2242A or TMC2242B meets

CCIR 601 low-pass ﬁlter requirement

• Dedicated 12-bit 2's complement input data port and

16-bit output data port with user-selectable rounding from

9 to 16 bits

• Direct digital synthesis

• Radar

• Two's complement or offset binary output format

• Built-in limiter prevents overﬂow

Description

The TMC2242A and TMC2242B are ﬁxed-coefﬁcient lin-

ear-phase half-band (low-pass) digital ﬁlters. They can be

used to halve or double the sampling rate of a digital signal.

When used as a decimating post-ﬁlter with a double-speed

oversampling A/D converter, they greatly reduce the cost and

complexity of anti-aliasing ﬁlters required ahead of the A/D

converter. When used as an interpolating pre-ﬁlter with a

double-speed oversampling D/A converter, the TMC2242A

and TMC2242B signiﬁcantly reduce the design complexity

and production cost of reconstruction ﬁlters used on D/A

outputs.

The TMC2242A and TMC2242B user selects the mode of

operation (decimate, interpolate, or equal-rate) and round-

ing. The TMC2242A and TMC2242B accept 12-bit 2's com-

plement data at up to 60 MHz and output saturated

(overﬂow-protected) 2's complement or offset binary data

rounded to from 9 to 16 bits. Within the speed grade I/O

limit, the output sample rate may be 1/2, 1, or 2 times the

input sample rate.

Block Diagram

55 Tap

FIR

Round

and

11-0

15-0

Filter

Limit

Interpolate 0-1-0-1

Decimate, Equal Rate 1-1-1-1

CLK

DEC

INT

TCO

Control

RND

2-0

SYNC

65-2242A-01

Rev. 1.2.0

12 3 4 5 6 7...16

中文翻译

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与TMC2242BR2C2相关器件

型号	品牌	获取价格	描述	数据表
TMC2242C	FAIRCHILD	获取价格	Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz
TMC2242CKTC	FAIRCHILD	获取价格	Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz
TMC2242CKTC1	FAIRCHILD	获取价格	Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz
TMC2242CR2C	FAIRCHILD	获取价格	Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz
TMC2242CR2C1	FAIRCHILD	获取价格	Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz
TMC2246	FAIRCHILD	获取价格	Image Filter 11 x 10 bit, 60 MHz
TMC2246A	FAIRCHILD	获取价格	Image Filter 11 x 10 bit, 60 MHz
TMC2246A	CADEKA	获取价格	Image Filter 11 x 10 bit, 60 MHz
TMC2246AG1C	FAIRCHILD	获取价格	Image Filter 11 x 10 bit, 60 MHz
TMC2246AG1C	CADEKA	获取价格	Image Filter 11 x 10 bit, 60 MHz

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