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Details, datasheet, quote on part number:X9110TV14I
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Datasheet text preview:
APPLICATION NOTES AND DEVELOPMENT SYSTEM AVAILABLE
AN99 ˇ AN115 ˇ AN124 ˇAN133 ˇ AN134 ˇ AN135
Dual Supply / Low Power / 1024-tap / SPI bus
Preliminary Information
X9110
Single Digitally-Controlled (XDCPTM) Potentiometer
FEATURES ˇ 1024 Resistor Taps 10-Bit Resolution ˇ SPI Serial Interface for write, read, and transfer operations of the potentiometer ˇ Wiper Resistance, 40 Typical @ 5V ˇ Four Non-Volatile Data Registers ˇ Non-Volatile Storage of Multiple Wiper Positions ˇ Power On Recall. Loads Saved Wiper Position on Power Up. ˇ Standby Current < 3ľA Max ˇ System VCC: 2.7V to 5.5V Operation ˇ Analog V+/V-: -5V to +5V ˇ 100K End to End Resistance ˇ 100 yr. Data Retention ˇ Endurance: 100, 000 data changes per bit per register ˇ 14-Lead TSSOP, 15-Lead CSP (Chip Scale Package). Call Factory for Availability. ˇ Dual Supply Version of the X9111 ˇ Low Power CMOS DESCRIPTION The X9110 integrates a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 1023 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the SPI bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four non-volatile Data Registers that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array though the switches. Powerup recalls the contents of the default data register (DR0) to the WCR. The XDCP can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
FUNCTIONAL DIAGRAM
VCC RH V+
SPI Bus Interface
Address Data Status
Bus Interface & Control
Write Read Transfer
Power On Recall Wiper Counter Register (WCR) Data Registers (DR0-DR3) Wiper
100K 1024-taps POT
Control
VSS
NC
NC
RW
RL
V-
REV 1.1.8 5/9/03
www.xicor.com
Characteristics subject to change without notice.
1 of 21
X9110 Preliminary Information
DETAILED FUNCTIONAL DIAGRAM
VCC V+
HOLD CS
Power On Recall
DR0 DR1
Wiper Counter Register (WCR)
SCK SO SI
RH
100K 1024-taps
A0
Interface and Control Circuitry
Data
DR2 DR3
RL RW
Control
WP
VSS
V-
CIRCUIT LEVEL APPLICATIONS ˇ Vary the gain of a voltage amplifier ˇ Provide programmable dc reference voltages for comparators and detectors ˇ Control the volume in audio circuits ˇ Trim out the offset voltage error in a voltage amplifier circuit ˇ Set the output voltage of a voltage regulator ˇ Trim the resistance in Wheatstone bridge circuits ˇ Control the gain, characteristic frequency and Q-factor in filter circuits ˇ Set the scale factor and zero point in sensor signal conditioning circuits ˇ Vary the frequency and duty cycle of timer ICs ˇ Vary the dc biasing of a pin diode attenuator in RF circuits ˇ Provide a control variable (I, V, or R) in feedback circuits
SYSTEM LEVEL APPLICATIONS ˇ Adjust the contrast in LCD displays ˇ Control the power level of LED transmitters in communication systems ˇ Set and regulate the DC biasing point in an RF power amplifier in wireless systems ˇ Control the gain in audio and home entertainment systems ˇ Provide the variable DC bias for tuners in RF wireless systems ˇ Set the operating points in temperature control systems ˇ Control the operating point for sensors in industrial systems ˇ Trim offset and gain errors in artificial intelligent systems
REV 1.1.8 5/9/03
www.xicor.com
Characteristics subject to change without notice.
2 of 21
X9110 Preliminary Information
PIN CONFIGURATION
TSSOP V+ S0 A0 SCK WP SI VSS 1 2 3 4 X9110 5 6 7 14 13 12 11 10 9 8 VCC RL RH RW HOLD CS VX9110 CSP
Call Factory for Availability
PIN ASSIGNMENTS Pin (TSSOP)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Pin (CSP)
Symbol
V+ SO A0 SCK WP SI VSS VCS HOLD RW RH RL VCC Analog Supply Voltage Serial Data Output Device Address Serial Clock Hardware Write Protect Serial Data Input System Ground Analog Supply Voltage Chip Select
Function
Device Select. Pause the Serial Bus Wiper Terminal of the Potentiometer High Terminal of the Potentiometer Low Terminal of the Potentiometer System Supply Voltage
REV 1.1.8 5/9/03
www.xicor.com
Characteristics subject to change without notice.
3 of 21
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