- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17058 > EVAL-AD7298SDZ (Analog Devices Inc)BOARD EVAL FOR AD7298 PDF資料下載
參數(shù)資料
| 型號： | EVAL-AD7298SDZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7298 |
| 標準包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | DSP，串行，SPI? |
| 工作溫度： | -40°C ~ 125°C |
| 已用 IC / 零件： | AD7298 |
| 已供物品： | 板，纜線，CD |
AD7298
Rev. B | Page 15 of 24
Temperature Value Format
VDRIVE
One LSB of the ADC corresponds to 0.25°C. The temperature
reading from the ADC is stored in a 12-bit twos complement
format to accommodate both positive and negative temperature
measurements. The temperature data format is provided in
The AD7298 also provides the VDRIVE feature. VDRIVE controls the
voltage at which the serial interface operates. VDRIVE allows the
ADC to easily interface to both 1.8 V and 3 V processors. For
example, if the AD7298 is operated with a VDD of 3.3 V, the
VDRIVE pin can be powered from a 1.8 V supply.
This enables the AD7298 to operate with a larger dynamic
range with a VDD of 3.3 V while still being able to interface to
1.8 V processors. Take care to ensure VDRIVE does not exceed
section).
Table 6. Temperature Data Format
Temperature (°C)
Digital Output
40
1111 0110 0000
25
1111 1001 1100
10
1111 1101 1000
THE INTERNAL OR EXTERNAL REFERENCE
0.25
1111 1111 1111
0
0000 0000 0000
The AD7298 can operate with either the internal 2.5 V on-chip
reference or an externally applied reference. The EXT_REF bit
in the control register is used to determine whether the internal
reference is used. If the EXT_REF bit is selected in the control
register, an external reference can be supplied through the
VREF pin. On power-up, the internal reference is enabled.
Suitable external reference sources for the AD7298 include
+0.25
0000 0000 0001
+10
0000 0010 1000
+25
0000 0110 0100
+50
0000 1100 1000
+75
0001 0010 1100
+100
0001 1001 0000
+105
0001 1010 0100
+125
0001 1111 0100
The internal reference circuitry consists of a 2.5 V band gap
reference and a reference buffer. When the AD7298 operates in
internal reference mode, the 2.5 V internal reference is available
at the VREF pin, which should be decoupled to GND1 using a 10 μF
capacitor. It is recommended that the internal reference be buffered
before applying it elsewhere in the system.
The temperature conversion formulas are as follows:
Positive Temperature = ADC Code/4
Negative Temperature = (4096 ADC Code)/4
The previous formulas are for a VREF of 2.5 V only.
If an external reference is used, the temperature sensor requires
an external reference of between 2 V and 2.5 V for correct
operation. When an external reference of less than 2.5 V is
applied, the temperature results are calculated using the
following formula, where VEXT_REF is the value of the external
The internal reference is capable of sourcing up to 2 mA of
current when the converter is static. The reference buffer
requires 5.5 ms to power up and charge the 10 μF decoupling
capacitor during the power-up time.
reference voltage.
15
.
273
3
.
109
10
_
+
=
ADCCode
V
e
Temperatur
REF
EXT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RPP20-243.3S/N | CONV DC/DC 20W 18-36VIN 3.3VOUT |
| RPP20-2424D/N | CONV DC/DC 20W 18-36VIN +/-24V |
| EEM30DRMD | CONN EDGECARD 60POS .156 WW |
| RPP20-2415S/N | CONV DC/DC 20W 18-36VIN 15VOUT |
| CDB4364 | EVALUATION BOARD FOR CS4364 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7298SDZ | 制造商:Analog Devices 功能描述:EVAL BOARD, AD7192 12BIT ADC |
| EVAL-AD7321CB | 制造商:AD 制造商全稱:Analog Devices 功能描述:500 kSPS, 2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC |
| EVAL-AD7321CBZ | 功能描述:BOARD EVALUATION FOR AD7321 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:iCMOS® 產(chǎn)品培訓模塊: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 |
| EVAL-AD7322CB1 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC |
| EVAL-AD7322CBZ | 功能描述:BOARD EVALUATION FOR AD7322 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:iCMOS® 產(chǎn)品培訓模塊: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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。