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LC78835KM の電気的特性と機能
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LC78835KMのメーカーはSanyo Semicon Deviceです、この部品の機能は「18 Bits Digital Filter and D/A Converter for Digital Audio」です。 |
製品の詳細 ( Datasheet PDF )
| 部品番号 | LC78835KM |
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| 部品説明 | 18 Bits Digital Filter and D/A Converter for Digital Audio | ||
| メーカ | Sanyo Semicon Device | ||
| ロゴ |  |
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このページの下部にプレビューとLC78835KMダウンロード（pdfファイル）リンクがあります。 Total 14 pages
Ordering number : EN4624B
CMOS IC
LC78835K, 78835KM
18 Bits Digital Filter and D/A Converter
for Digital Audio
Overview
The LC78835K and 78835KM are 18-bit digital-to-analog
D/A converter CMOS ICs with an on-chip eight-times
oversampling digital filter. The LC78835 and the
LC78835M are pin compatible.
Features
• Digital filter
— 8 fs oversampling filter: 3-stage finite-impulse-
response (FIR) filter design (43rd-, 11th-, and third-
orders)
— De-emphasis filter: Supports fs = 32 kHz, 44.1 kHz,
or 48 kHz
— Soft mute
— Noise shaper
— Supports double-rate sampling
• D/A converter
— Dynamic level-shifting 18-bit digital-to-analog
converter
— On-chip 2-channel D/A converter (with
corresponding output)
— On-chip output op-amp
— Supports 384 fs, 392 fs, 448 fs, or 512 fs system
clock
— Single 5 V supply
— Permits low-voltage operation (3.5 V)
— Low-power silicon-gate CMOS process
Package Dimensions
unit: mm
3092-DIP24W
[LC78835K]
unit: mm
3155-MFP24
[LC78835KM]
SANYO: DIP24W
SANYO: MFP24
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73696HA (OT)/N1094TH (OT)/82793JN No. 4624-1/14
1 Page  
Audio Input Waveforms
LC78835K, 78835KM
Electrical Characteristics (1)
at Ta = 25°C, AVDD = DVDD = VrefH = 5.0 V, AGND = DGND = VrefL = 0 V, unless otherwise specified
Parameter
Symbol
Conditions
D/A converter resolution
Total harmonic distortion
Dynamic range
Crosstalk
Signal-to-noise ratio
Full-scale output voltage
Power dissipation
Output load resistance
RES
THD
DR
CT
S/N
VFS
Pd
RL
At 1 kHz, 0 dB*1
At 1 kHz, –60 dB
At 1 kHz, 0 dB
JIS-A
*2
21, 23 pin
Note: 1. “0 dB” signifies full scale.
2. XIN pulse width (pin 11) 1.5 to 3.5 V, fx = 16.9344 MHz
Test circuit: Based on application circuit
Ratings
Unit
min typ max
18 Bits
0.08 %
90 dB
–85 dB
96 dB
3.0 VP-P
135 200 mW
5 kΩ
No. 4624-3/14
3Pages 
LC78835K, 78835KM
Description of Operation
1. Digital Filter
The LC78835K and 78835KM perform arithmetic functions as shown in the following block diagrams.
• Oversampling
Constructed of twice as many interpolation filters with a cascade connection arrangement using finite-impulse-
response (FIR) filters. When operating in normal-rate mode, data is transferred through a three-stage cascading
process consisting of 43rd-order, 11th-order, and third-order finite impulse response (FIR) filters connected
together to produce an eight-times oversampled signal. When operating in double-rate mode, data is transferred
through a two-stage cascading process consisting of 43rd-order and second-order finite-impulse-response (FIR)
connected filters to give a four-times oversampled signal. For further details concerning filter characteristics, refer
to page 12.
• De-emphasis
Digital de-emphasis is performed using a first-order infinite-impulse-response (IIR) filter. Filter supported
sampling frequencies include fs = 32 kHz, 44.1 kHz and 48 kHz (frequencies are all doubled with double-rate
mode).
No. 4624-6/14
6 Page | |||
| ページ | 合計 : 14 ページ | ||
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PDF ダウンロード | [ LC78835KM データシート.PDF ] | |
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データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
共有リンク
Link :| 部品番号 | 部品説明 | メーカ |
| LC78835K | 18 Bits Digital Filter and D/A Converter for Digital Audio | Sanyo Semicon Device |
| LC78835KM | 18 Bits Digital Filter and D/A Converter for Digital Audio | Sanyo Semicon Device |