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ISL23711 Arkusz danych(PDF) 6 Page - Intersil Corporation |
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ISL23711 Arkusz danych(HTML) 6 Page - Intersil Corporation |
6 / 9 page 6 FN6127.0 August 16, 2005 NOTES: 1. Typical values are for TA = 25°C and ±5V supply voltage. 2. LSB: [V(RW)127 – V(RW)0] / 127. V(RW)127 and V(RW)0 are V(RW) for the DCP register set to 7F hex and 00 hex respectively. LSB is the incremental voltage when changing from one tap to an adjacent tap. 3. ZS error = (V(RW)0 – V-) / LSB. 4. FS error = [V(RW)127 – VCC] / LSB. 5. DNL = [V(RW)i – V(RW)i-1] / LSB-1, for i = 1 to 127. i is the DCP register setting. 6. INL = V(RW)i – (i • LSB – V(RW)0) for i = 1 to 127. 7. for i = 16 to 120 decimal, Max( ) is the maximum value of the wiper voltage and Min ( ) is the minimum value of the wiper voltage over the temperature range. 8. MI = |R127 – R0| / 127. R127 and R0 are the measured resistances for the DCP register set to 7F hex and 00 hex respectively. 9. Roffset = R0 / MI, when measuring between RW and RL. Roffset = R127 / MI, when measuring between RW and RH. 10. RDNL = (Ri – Ri-1) / MI, for i = 16 to 127. 11. RINL = [Ri – (MI • i) – R0] / MI, for i = 16 to 127. 12. for i = 16 to 127, Max( ) is the maximum value of the resistance and Min ( ) is the minimum value of the resistance over the temperature range. 13. This parameter is not 100% tested. 14. These are I2C specific parameters and are not directly tested, however they are used during device testing to validate device specification. Test Circuit Equivalent Circuit Pin Descriptions Potentiometer Pins RH AND RL The high (RH) and low (RL) terminals of the ISL23711 are equivalent to the fixed terminals of a mechanical potentiometer. The terminology of RL and RH references the relative position of the terminal in relation to wiper movement direction selected by the I2C serial input and not the voltage potential on the terminal. R W Rw is the wiper terminal and is equivalent to the movable terminal of a mechanical potentiometer. The position of the wiper within the array is determined by the control inputs. BUS INTERFACE PINS Serial Data Input/Output (SDA) The SDA is a bidirectional serial data input/output pin for the I2C interface. It receives device address, operation code, wiper register address and data from an I2C external master device at the rising edge of the serial clock SCL, and it shifts out data after each falling edge of the serial clock SCL. SDA requires an external pull-up resistor, since it’s an open drain output. Serial Clock (SCL) This input is the serial clock of the I2C serial interface. Device Address (A1-A0) The Address inputs are used to set the least significant 2 bits of the 7-bit I2C interface slave address. A match in the slave address serial data stream must be made with the Address input pins in order to initiate communication with the ISL23711. A maximum of 4 ISL23711 devices may occupy the I2C serial bus. Principles of Operation The ISL23711 is an integrated circuit incorporating one DCP with It’s associated register, and an I2C serial interface providing direct communication between a host and the potentiometer and memory. The resistor array is comprised TCV Max V RW () i () Min V RW () i () – Max V RW () i () Min V RW () i () + [] 2 ⁄ ---------------------------------------------------------------------------------------------- 106 125°C ----------------- × = TCR Max Ri () Min Ri () – [] Max Ri () Min Ri () + [] 2 ⁄ ---------------------------------------------------------------- 10 6 125°C ----------------- × = FORCE CURRENT TEST POINT RW CH CL RW RTOTAL CW RH RL ISL23711 |
Podobny numer części - ISL23711 |
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Podobny opis - ISL23711 |
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