Os motores de busca de Datasheet de Componentes eletrônicos |
|
AD2S93 Folha de dados(PDF) 8 Page - Analog Devices |
|
AD2S93 Folha de dados(HTML) 8 Page - Analog Devices |
8 / 12 page –8– REV. A AD2S93 Three- or Four-Wire LVDT Connection In this method of connection, shown in Figure 6, the converters digital output is proportional to the ratio: ( A − B ) ( A + B )/ 2 where A and B are the individual LVDT secondary output volt- ages. Inspection of Figure 6 should demonstrate why this rela- tionship is true. (A–B) is simply the voltage across the series connected secondaries of the LVDT and is applied to the A, B input to the converter. (A + B)/2 is effectively the average of the two secondary voltages as computed by the balanced bridge completion resistors and the grounding of the secondary center-tap. Note: This method of connection is appropriate only for where (A + B) is a constant, independent of LVDT position. Any lack of constancy in (A + B) will be reflected as an additional non- linearity in the output. It is up to the user to determine if (A + B) is sufficiently constant over the particular stroke length em- ployed. This method will usually restrict the usable LVDT range to half of its full range. The restriction can be eliminated, however, by attenuating DIFF by a factor of 2 or increasing VREF by a factor of 2. This connection method has the tremendous advantage of being insensitive to temperature related phase shifts and excita- tion oscillator instability effects usually associated with more conventional LVDT conversion systems. As in the case of the half-bridge type LVDT connection, RC1 and RC2 are the bridge completion resistors and are matched to a degree sufficient to ensure that the digital output representing the null position does not vary from the LVDT’s natural null position. If null adjustment is required, a potentiometer can be used in place of the common connection between the two resistors. NC = NO CONNECT NC OVR NULL DEMODOUT DIR 26 27 28 4 2 3 15 18 17 16 12 14 13 25 24 21 20 19 23 22 1 5 69 10 11 7 8 TOP VIEW (Not to Scale) AD2S93 +5V 0V –5V LOS 12k Ω GAIN DIFF AGND A B R4 R3 V DD R C2 R C1 B A R2 C2 C1 C3 R5 REF PISTON GND V DD V SS DGND R6 R7 C4 Figure 5. Half-Bridge Type LVDT Connection NC = NO CONNECT NC OVR NULL DEMODOUT DIR 26 27 28 4 2 3 15 18 17 16 12 14 13 25 24 21 20 19 23 22 1 5 6 9 10 11 7 8 TOP VIEW (Not to Scale) AD2S93 V DD DGND V SS +5V 0V –5V C3 R5 LOS 12k Ω GAIN DIFF AGND A B R4 R3 PISTON V DD REF C4 R6 R2 C2 C1 R7 R C2 R C1 Figure 6. Three- or Four-Wire LVDT Connection |
Nº de peça semelhante - AD2S93 |
|
Descrição semelhante - AD2S93 |
|
|
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 |