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X9110 Datasheet(PDF) 3 Page - Intersil Corporation |
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X9110 Datasheet(HTML) 3 Page - Intersil Corporation |
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3 / 18 page  3 FN8158.2 October 7, 2005 Circuit Level Applications • Vary the gain of a voltage amplifier • Provide programmable dc reference voltages for comparators and detectors • Control the volume in audio circuits • Trim out the offset voltage error in a voltage amplifier circuit • Set the output voltage of a voltage regulator • Trim the resistance in Wheatstone bridge circuits • Control the gain, characteristic frequency and Q-factor in filter circuits • Set the scale factor and zero point in sensor signal conditioning circuits • Vary the frequency and duty cycle of timer ICs • Vary the dc biasing of a pin diode attenuator in RF circuits • Provide a control variable (I, V, or R) in feedback circuits System Level Applications • Adjust the contrast in LCD displays • Control the power level of LED transmitters in communication systems • Set and regulate the DC biasing point in an RF power amplifier in wireless systems • Control the gain in audio and home entertainment systems • Provide the variable DC bias for tuners in RF wireless systems • Set the operating points in temperature control systems • Control the operating point for sensors in industrial systems • Trim offset and gain errors in artificial intelligent systems Bus Interface Pins SERIAL OUTPUT (SO) SO is a serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out on the falling edge of the serial clock. SERIAL INPUT (SI) SI is the serial data input pin. All opcodes, byte addresses and data to be written to the pots and pot registers are input on this pin. Data is latched by the rising edge of the serial clock. SERIAL CLOCK (SCK) The SCK input is used to clock data into and out of the X9110. HOLD (HOLD) HOLD is used in conjunction with the CS pin to select the device. Once the part is selected and a serial sequence is underway, HOLD may be used to pause the serial communication with the controller without resetting the serial sequence. To pause, HOLD must be brought LOW while SCK is LOW. To resume communication, HOLD is brought HIGH, again while SCK is LOW. If the pause feature is not used, HOLD should be held HIGH at all times. DEVICE ADDRESS (A0) The address input is used to set the 8-bit slave address. A match in the slave address serial data stream A0 must be made with the address input (A0) in order to initiate communication with the X9110. CHIP SELECT (CS) When CS is HIGH, the X9110 is deselected and the SO pin is at high impedance, and (unless an internal write cycle is underway) the device will be in the standby state. CS LOW enables the X9110, placing it in the active power mode. It should be noted that after a power-up, a HIGH to LOW transition on CS is required prior to the start of any operation. HARDWARE WRITE PROTECT INPUT (WP) The WP pin when LOW prevents nonvolatile writes to the Data Registers. Pin Descriptions PIN (TSSOP) SYMBOL FUNCTION 1 V+ Analog Supply Voltage 2 SO Serial Data Output 3 A0 Device Address 4 SCK Serial Clock 5WP Hardware Write Protect 6 SI Serial Data Input 7VSS System Ground 8V - Analog Supply Voltage 9 CS Chip Select 10 HOLD Device Select. Pause the Serial Bus 11 RW Wiper Terminal of the Potentiometer 12 RH High Terminal of the Potentiometer 13 RL Low Terminal of the Potentiometer 14 VCC System Supply Voltage Pin Descriptions PIN (TSSOP) SYMBOL FUNCTION X9110 |
Similar Part No. - X9110 |
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Similar Description - X9110 |
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