- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384602 > LMC1992CCN (NATIONAL SEMICONDUCTOR CORP) LMC1992 Digitally-Controlled Stereo Tone and Volume Circuit with Four-Channel Input-Selector PDF資料下載
參數(shù)資料
| 型號(hào)： | LMC1992CCN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | LMC1992 Digitally-Controlled Stereo Tone and Volume Circuit with Four-Channel Input-Selector |
| 中文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁(yè)數(shù)： | 9/14頁(yè) |
| 文件大?。?/td> | 260K |
| 代理商： | LMC1992CCN |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)
Applications Information
(Continued)
TL/H/10789–22
FIGURE 4. The Tone Control Amplifier
Increasing the values of C2 and C3 decreases the turnover
and inflection frequencies: i.e., the Tone Control Response
Curves shown in Typical Performance Curves will shift left
when C2 and C3 are increased and shift right when C2 and
C3 are decreased. With C2
e
C3
e
0.0082, 2 dB steps are
achieved at 100 Hz and 10 kHz. Changing C2 and C3 to
0.01
m
F shifts the 2 dB per step frequency to 72 Hz and 8.3
kHz. If the tone control capacitors’ size is decreased these
frequencies will increase. With C2
e
C3
e
0.0068
m
F the 2
dB steps take place at 130 Hz and 11.2 kHz.
FADER FUNCTION
The four fader functions are all independently adjustable
and therefore no balance control is needed. Emulating a
balance control is accomplished through software by simul-
taneously changing a channel’s front and rear faders by
equal amounts. To satisfy normal balance requirements the
faders have an attenuation range of 40 dB.
SERIAL COMMUNICATION INTERFACE
Figure 5 shows the LMC1992’s timing diagram for its three
wire MICROWIRE interface. A controller’s data stream can
be any length; once the correct device address is received
by the LMC1992, any number of data bits can be sent; the
last nine bits occurring before ENABLE goes high are used
by the LMC1992. The first two bits in a valid data stream are
decoded and used as device address bits. The LMC1992
uses a unique address of 1,0. The LMC1992 will not re-
spond to information on the DATA line if any other address
is used. This allows other MICROWIRE serially programma-
ble devices to share the same three-wire communication
bus. When ENABLE goes high, any further serial data is
ignored and the contents of the shift register is transferred
to the data latches. Only when information is received by
the data latches do any function or setting changes take
place. The first three of nine bits select one of the
LMC1992s functions. The remaining six bits set the select-
ed function to the desired value or position.
A data bit is accepted as valid and clocked into an internal
shift register on each rising edge of the signal appearing at
the LMC1992s CLOCK input pin. Proper data interpretation
and operation is ensured when ENABLE makes its falling
transition during the time when CLOCK is low. Erroneous
operation will result if the ENABLE signal makes its falling
transition at any other time.
TL/H/10789–21
Note 1:
Negative transition on ENABLE clears previous address. Clock must be low during transition.
Note 2:
Additional don’t care states may be inserted here for ease of programming. (Optional.)
Note 3:
Positive transition on ENABLE latches in new data if the LMC1992 has been addressed. Clock can either be high or low during transition.
FIGURE 5. Clocking Data into the Standard MICROWIRE Interface
(Minimum Number of Bits in Data Stream)
9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMC2001 | High Precision, 6MHz Rail-To-Rail Output Operational Amplifier |
| LMC2001ACM5 | High Precision, 6MHz Rail-To-Rail Output Operational Amplifier |
| LMC2001ACM5X | High Precision, 6MHz Rail-To-Rail Output Operational Amplifier |
| LMC2001AIM | High Precision, 6MHz Rail-To-Rail Output Operational Amplifier |
| LMC2001AIMX | High Precision, 6MHz Rail-To-Rail Output Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMC200 | 制造商:Black Box Corporation 功能描述:14 SLOT POWER CHASSIS W/1 POWE |
| LMC2001 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Precision, 6MHz Rail-To-Rail Output Operational Amplifier |
| LMC2001 WAF | 制造商:Texas Instruments 功能描述: |
| LMC2001ACM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LMC2001ACM5X | 功能描述:IC OP AMP 6MHZ R-R OUT SOT23-5 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。