- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17061 > DC979A (Linear Technology)BOARD DELTA SIGMA ADC LTC2442 PDF資料下載
參數(shù)資料
| 型號： | DC979A |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 6/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2442 |
| 軟件下載： | QuikEval System |
| 設(shè)計資源： | DC979A Design File DC979A Schematic |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | QuikEval™ |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 8k |
| 數(shù)據(jù)接口： | MICROWIRE?，串行，SPI? |
| 工作溫度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2442 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | LTC2442IG#TRPBF-ND - IC ADC 24BIT 250MSPS 36-SSOP LTC2442CG#TRPBF-ND - IC ADC 24BIT 250MSPS 36-SSOP LTC2442IG#PBF-ND - IC ADC 24BIT 4CH 36-SSOP LTC2442CG#PBF-ND - IC ADC 24BIT 4CH 36-SSOP |
第1頁第2頁第3頁第4頁第5頁當(dāng)前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
LTC2442
14
2442fa
For more information www.linear.com/LTC2442
Chip Select Input (CS)
The active LOW chip select, CS (Pin 35), is used to test the
conversion status and to enable the data output transfer
as described in the previous sections.
In addition, the CS signal can be used to trigger a new
conversion cycle before the entire serial data transfer has
been completed. The LTC2442 will abort any serial data
transfer in progress and start a new conversion cycle
anytime a LOW-to-HIGH transition is detected at the CS
pin after the converter has entered the data output state.
Serial Data Input (SDI)
The serial data input (SDI, Pin 33) is used to select the
speed/resolution and input channel of the LTC2442. SDI
is programmed by a serial input data stream under the
control of SCK during the data output cycle, see Figure 3.
Initially, after powering up, the device performs a conver-
sion with SEL+ = CH0, SEL– = CH1, OSR = 256 (output rate
nominally 879Hz), and 1X speedup mode (no Latency).
Once this first conversion is complete, the device enters
the sleep state and is ready to output the conversion result
and receive the serial data input stream programming the
speed/resolutionandinputchannelforthenextconversion.
At the conclusion of each conversion cycle, the device
enters this state.
In order to change the speed/resolution or input channel,
the first three bits shifted into the device are 101. This is
compatible with the programming sequence of all LTC
multichannel differential input
DSADCs. If the sequence
is set to 000 or 100, the following input data is ignored
(don’t care) and the previously selected speed/resolution
and channel remain valid for the next conversion. Combi-
nations other than 101, 100, and 000 of the three control
bits should be avoided.
If the first three bits shifted into the device are 101, then
the following five bits select the input channel for the fol-
lowing conversion (see Tables 3 and 4). The next five bits
select the speed/resolution and mode 1X (no Latency) 2X
(doubleoutputratewithoneconversionlatency),seeTable
4. If these five bits are set to all 0’s, the previous speed
remains selected for the next conversion. This is useful
in applications requiring a fixed output rate/resolution but
need to change the input channel.
When an update operation is initiated the first three bits
are 101. The following five bits are the channel address.
The first bit, SGL, determines if the input selection is
differential (SGL = 0) or single-ended (SGL = 1). For SGL
= 0, two adjacent channels can be selected to form a dif-
ferential input. For SGL = 1, one of 4 channels is selected
as the positive input. The negative input is COM for all
single ended operations. The next 4-bits (ODD, A2, A1,
A0) determine which channel is selected and its polarity,
(see Table 3). In order to remain software compatible with
LTCs other multi-channel
DSADCs, A2 and A1 are unused
and should be set low.
Speed Multiplier Mode
In addition to selecting the speed/resolution, a speed
multiplier mode is used to double the output rate while
maintaining the selected resolution. The last bit of the
5-bit speed/resolution control word (TWOX, see Table 4)
determines if the output rate is 1X (no speed increase) or
2X (double the selected speed).
While operating in the 1X mode, the device combines two
internal conversions for each conversion result in order
to remove the ADC offset. Every conversion cycle, the
offset and offset drift are transparently calibrated greatly
simplifying the user interface. The resulting conversion
resulthasnolatency.Thefirstconversionfollowinganewly
applications inForMation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DC742A | BOARD DELTA SIGMA ADC LTC2449 |
| RCM15DCAN-S189 | CONN EDGECARD 30POS R/A .156 SLD |
| DC846A | BOARD DELTA SIGMA ADC LTC2447 |
| LGN2H680MELZ30 | CAP ALUM 68UF 500V 20% SNAP |
| VE-B20-EY | CONVERTER MOD DC/DC 5V 50W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DC981A/B | 制造商:Linear Technology 功能描述:BOARD EVAL LTC4263 制造商:Linear Technology 功能描述:LTC4263 PSE CONTROLLER EVAL BOARD 制造商:Linear Technology 功能描述:DEMO BOARD, LTC4263 POWER OVER ETHERNET (POE), Silicon Manufacturer:Linear Techn |
| DC985A-A/B | 制造商:Linear Technology 功能描述:DEMO BOARD FOR LTC4245 制造商:Linear Technology 功能描述:EVAL BOARD, LTC4245CUHF HOT SWAP CONTR |
| DC996B-A | 制造商:Linear Technology 功能描述:BOARD DEMO 16BIT 130MSPS LTC2208 制造商:Linear Technology 功能描述:16BIT ADC Eval Brd, Rq. DC718 or DC590 制造商:Linear Technology 功能描述:16BIT ADC Eval Brd, Rq. DC718 or DC590; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2208IUP; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide |
| DC996B-B | 制造商:Linear Technology 功能描述:BOARD DEMO 16BIT 130MSPS LTC2208 制造商:Linear Technology 功能描述:16BIT ADC Eval Brd, Rq. DC718 or DC590 制造商:Linear Technology 功能描述:16BIT ADC Eval Brd, Rq. DC718 or DC590; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2208IUP; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide |
| DC996B-E | 制造商:Linear Technology 功能描述:BOARD DEMO 16BIT 105MSPS LTC2217 制造商:Linear Technology 功能描述:16BIT ADC Eval Brd, Rq. DC718 or DC590 制造商:Linear Technology 功能描述:16BIT ADC Eval Brd, Rq. DC718 or DC590; Silicon Manufacturer:Linear Technology; Silicon Core Number:LTC2217IUP; Kit Application Type:Data Converter; Application Sub Type:ADC; Kit Contents:Board, Guide |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。