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Details, datasheet, quote on part number:X9111TV14I-2.7
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Datasheet text preview:
APPLICATION NOTES AND DEVELOPMENT SYSTEM AVAILABLE
AN99 ˇ AN115 ˇ AN124 ˇAN133 ˇ AN134 ˇ AN135
Single Supply / Low Power / 1024-tap / SPI bus
Preliminary Information
X9111
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 VCC: 2.7V to 5.5V Operation 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 Packaging) ˇ Low Power CMOS ˇ Single Supply version of the X9110 DESCRIPTION The X9111 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
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
RW
RL
REV 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice.
1 of 21
X9111 Preliminary Information
DETAILED FUNCTIONAL DIAGRAM
VCC
HOLD CS
Power On Recall
DR0 DR1
Wiper Counter Register (WCR)
SCK SO SI
RH
100K 1024-taps
A0 A1
WP
Interface and Control Circuitry
Data
DR2 DR3
RL RW
Control
VSS
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 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice.
2 of 21
X9111 Preliminary Information
PIN CONFIGURATION
TSSOP SO A0 NC CS SCK SI VSS 1 2 3 4 X9111 5 6 7 14 13 12 11 10 9 8 VCC RL RH RW HOLD A1 WP 3 X9111 A SO B A0 C CS D SCK E SI VSS A1 WP HOLD NC RW NC RH VCC RL CSP 2 1
PIN ASSIGNMENTS Pin (TSSOP)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Pin (CSP)
A3 B3 B2, C2 C3 D3 E3 E2 D2 E1 D1 C1 B1 A1 A2
Symbol
SO A0 NC CS SCK SI VSS WP A1 HOLD RW RH RL VCC Serial Data Output Device Address No Connect Chip Select Serial Clock Serial Data Input System Ground Hardware Write Protect Device Address
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 1.1.15 5/9/03
www.xicor.com
Characteristics subject to change without notice.
3 of 21
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