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參數(shù)資料
| 型號(hào)： | TMC2242CR2C |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 數(shù)字信號(hào)處理外設(shè) |
| 英文描述： | Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz |
| 中文描述： | 12-BIT, DSP-DIGITAL FILTER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大小： | 89K |
| 代理商： | TMC2242CR2C |
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www.fairchildsemi.com
Features
Pin-compatible upgrade of TMC2242B
User-selectable interpolate d.c. gain, 0 dB or -6 dB
True unity d.c. gain in all “0 db” modes
40 MSPS performance in equal-rate filter modes
40 and 60 MSPS speed grades in all other modes
User-selectable 2:1 decimation, 1:2 interpolation, and
equal-rate filter modes, plus unfiltered bypass/delay mode
Defeatable
π
x/sin(
π
x) compensation filter
Passband ripple <0.014 dB
Stopband rejection >56 dB
Dedicated 12-bit two’s complement or unsigned input bus
16-bit two’s complement or unsigned output bus with
user-selectable rounding to 8 to 16 effective bits
Programmable limiter prevents overflow or clips to
CCIR601 levels
New double-latency modes match Y channel data flow to
slower-sampled C
B
and C
R
data flows
New dual-channel interpolation and decimation for
YUV422
Applications
Digital-to-Analog Converter Prefiltering with optional
x/sinx correction
1:2 interpolation
Analog-to-Digital Converter Postfiltering
2:1 decimation
Low-ripple low-pass (0 to 0.2 f
s
) filter
Description
The TMC2242C, a linear-phase low-pass half-band digital
filter with fixed coefficients, can be used to halve or double
the sampling rate of a digital signal. When used as a decimat-
ing post-filter with a double-speed oversampling A/D con-
verter, it greatly reduces the cost and complexity of the
required analog antialiasing pre-filters. When used as an
interpolating pre-filter with a double-speed oversampling
D/A converter, it greatly reduces the complexity and cost of
the necessary analog post-filter, particularly when its x/sin(x)
correction filter is engaged.
The TMC2242C user selects the mode of operation (deci-
mate, interpolate, equal-rate, bypass, x/sin(x))and rounding.
The part can accept 12-bit two’s complement or unsigned
data at up to 60 MHz and can output saturated two’s comple-
ment or offset binary data rounded to from 8 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. Two-channel
modes permit it to interpolate or to decimate two multi-
plexed data streams (such as video C
B
and C
R
) jointly.
The filter response is flat to within
(e.g. 5.75MHz at a 27MHz clock rate), with stopband attenu-
ation greater than 56dB above 0.29f
filters such as the TMC2242C always have linear phase
response. Half-band response is -6 dB.
±
0.014 dB up to 0.21f
s
s
. Symmetric-coefficient
Fabricated on an advanced submicron CMOS process, the
TMC2242C is available in a 44-lead PLCC package. Perfor-
mance is guaranteed from 0 to 70
range of 4.75 to 5.25V.
°
C and over a power supply
Block Diagram
SI
11-0
TCO RND
OE
DEC
INT
SYNC
SO
15-0
SO
3-0
ROUND
LIMIT
X/SIN(X)
FILTER
FIR
FILT
ZERO
INSERT
DECIMATE
CONTROL
65-2242C-01
TMC2242C
Digital Half-Band Interpolating/Decimating Filter
12-bit In/16-bit Out, 60 MHz
Rev. 1.0.0
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PDF描述 |
|---|---|
| TMC2242CR2C1 | TRANS PNP 20V 5A SOT-89 |
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| TMC2246AH5C1 | Image Filter 11 x 10 bit, 60 MHz |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMC2242CR2C1 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Digital Half-Band Interpolating/Decimating Filter 12-bit In/16-bit Out, 60 MHz |
| TMC2246 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Image Filter 11 x 10 bit, 60 MHz |
| TMC2246A | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Image Filter 11 x 10 bit, 60 MHz |
| TMC2246A WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| TMC2246AG1C | 制造商:CADEKA 制造商全稱:CADEKA 功能描述:Image Filter 11 x 10 bit, 60 MHz |
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