- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378283 > ADC12181 (National Semiconductor Corporation) 12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold PDF資料下載
參數(shù)資料
| 型號： | ADC12181 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold |
| 中文描述： | 12位，10 MHz的自校準，流水線A / D轉(zhuǎn)換器，內(nèi)置采樣 |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 322K |
| 代理商： | ADC12181 |
Timing Diagrams
(Continued)
Functional Description
The ADC12181 is a monolithic CMOS analog-to-digital con-
verter capable of converting analog input signals into 12-bit
digital words at 10 megasamples per second (MSPS). This
device utilizes a proprietary pipeline architecture and algo-
rithm to minimize die size and power consumption. The
ADC12181 uses self-calibration and digital error correction
to maintain accuracy and performance over temperature.
The ADC12181 has an input sample-and-hold amplifier and
internal reference buffer. The analog input and the reference
voltage are converted to differential signals for internal use.
Using differential signals in the analog conversion core re-
duces crosstalk and noise pickup from the digital section and
power supply.
The pipeline conversion core has 15 sequential signal pro-
cessing stages. Each stage receives an analog signal from
the previous stage (called “residue” ) and produces a 1-bit
digital output that is sent to the digital correction module. At
each stage the analog signal received from the previous
stage is compared to an internally generated reference level.
It is then amplified by a factor of 2, and, depending on the
output of the comparator, the internal reference signal may
be subtracted from the amplifier output. This produces the
residue that is passed to the next stage.
The calibration module is activated at power-on or by user
request. During calibration the conversion core is put into a
special mode of operation in order to determine inherent
errors in the analog conversion blocks and to determine
correction coefficients for each digital output bit from the
conversion core and stores these coefficients in RAM. The
digital correction module uses the coefficients in RAM to
convert the raw data bits from the conversion core into the
12-bit digital output code.
Applications Information
1.0 ANALOG INPUTS
The ADC12181 has two single-ended analog inputs. V
REF
is
the reference input and V
IN
is the signal input.
1.1 Reference Input
The V
input must be driven from an accurate, stable
reference voltage source. of 1.8V to 2.2V, and bypassed to a
clean, quiet point in analog ground.
1.2 Analog Signal Input
The V
input must be driven with a low impedance signal
source that does not add any distortion to the input signal.
The ground reference for the V
input is the V
pin. The
V
pin must be connected to a clean, quiet point in
analog ground.
2.0 DIGITAL INPUTS
The ADC12181 has four digital inputs. They are CLOCK,
CAL, OE and PD.
2.1 CLOCK
The CLOCK signal drives an internal phase delay loop to
create timing for the ADC. The clock input should be driven
with a stable, low phase jitter TTL level clock signal in the
range of 1 to 10 MHz. The trace carrying the clock signal
should be as short as possible. This trace should not cross
any other signal line, analog or digital, not even at 90. A 100
Ohm resistor should be placed in series with the CLOCK pin,
as close to the pin as possible.
10103922
FIGURE 4. Reset and Calibration Timing
A
www.national.com
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADC12181CIVT | 12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold |
| ADC12181EVAL | 12-Bit, 5 MHz Self-Calibrating, Pipelined A/D Converter |
| ADC12191CIVT | 12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold |
| ADC12191 | 12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold(12位10 MHz可自行校對的管線式帶內(nèi)部采樣和保持功能A/D轉(zhuǎn)換器) |
| ADC121S625 | 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADC12181CIVT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| ADC12181EVAL | 功能描述:BOARD EVALUATION FOR ADC12181 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標準）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| ADC12191 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold |
| ADC12191CIVT | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit, 10 MHz Self-Calibrating, Pipelined A/D Converter with Internal Sample & Hold |
| ADC121C021 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:I2C-Compatible, 12-Bit Analog-to-Digital Converter (ADC) with Alert Function |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。