Os motores de busca de Datasheet de Componentes eletrônicos |
|
AD7814ARMZ2 Folha de dados(PDF) 7 Page - Analog Devices |
|
AD7814ARMZ2 Folha de dados(HTML) 7 Page - Analog Devices |
7 / 8 page REV. E –7– AD7814 AD7814* SCLK DOUT DIN CS 8051* P3.1 P3.0 P1.2 P1.3 *ADDITIONAL PINS OMITTED FOR CLARITY Figure 4. AD7814 to 8051 Interface AD7814 to PIC16C6x/7x Interface Figure 5 shows an interface circuit between the AD7814 and the PIC16C6x/7x microcontroller. The PIC16C6x/7x synchronous serial port (SSP) is configured as an SPI master with the clock polarity bit set to a logic one. In this mode, the serial clock line of the PIC16C6x/7x idles high between data transfers. Data is transferred to and from the AD7814 in two 8-bit serial data operations. In the example shown, port line RA1 is being used to generate the CS for the AD7814. AD7814* SCLK DOUT DIN CS PIC16C6x/7x* SCK SDO SDI RA1 *ADDITIONAL PINS OMITTED FOR CLARITY Figure 5. AD7814 to PIC16C6x/7x Interface AD7814 to ADSP-21xx Interface Figure 6 shows an interface between the AD7814 and the ADSP-21xx DSP processor. To ensure correct operation of the interface, the SPORT control register should be set up as follows: TFSW = RFSW = 1, Alternate Framing INVRFS = INVTFS = 1, Active Low Framing Signal DTYPE = 00, Right Justify Data SLEN = 1111, 16-Bit Data Words ISCLK = 1, Internal Serial Clock TFSR = RFS = 1, Frame Every Word IRFS = 0, RFS Configured As Input ITFS = 1, TFS Configured As Output The interface requires an inverter between the SCLK line of the ADSP-21xx and the SCLK input of the AD7814. The ADSP- 21xx has the TFS and RFS of the SPORT tied together with TFS set as an output and RFS set as an input. The DSP operates in alternate framing mode and the SPORT control register is set up as described earlier. AD7814* SCLK DOUT DIN CS ADSP-21xx* SCK DR DT RFS *ADDITIONAL PINS OMITTED FOR CLARITY TFS Figure 6. AD7814 to ADSP-21xx Interface MOUNTING THE AD7814 The AD7814 can be used for surface or air temperature sensing applications. If the device is cemented to a surface with ther- mally conductive adhesive, the die temperature will be within about 0.1 °C of the surface temperature, thanks to the device’s low power consumption. Care should be taken to insulate the back and leads of the device from the air, if the ambient air temperature is different from the surface temperature being measured. The ground pin provides the best thermal path to the die, so the temperature of the die will be close to that of the printed circuit ground track. Care should be taken to ensure that this is in good thermal contact with the surface being measured. As with any IC, the AD7814 and its associated wiring and cir- cuits must be kept free from moisture to prevent leakage and corrosion, particularly in cold conditions where condensation is more likely to occur. Water-resistant varnishes and conformal coatings can be used for protection. The small size of the AD7814 package allows it to be mounted inside sealed metal probes, which provide a safe environment for the device. SUPPLY DECOUPLING The AD7814 should be decoupled with a 0.1 µF ceramic capacitor between VDD and GND. This is particularly important if the AD7814 is mounted remotely from the power supply. TEMPERATURE – C –0.4 –55 –0.2 0 0.2 0.4 0.6 0.8 1.0 –40 0 25 40 85 100 120 Figure 7. Typical Temperature Error |
Nº de peça semelhante - AD7814ARMZ2 |
|
Descrição semelhante - AD7814ARMZ2 |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |