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Details, datasheet, quote on part number:X9429YVI
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| Part: | X9429YVI |
| Category: | Analog & Mixed-Signal Processing => Potentiometers => Digital Potentiometers |
| Description: | Single 64 Tap Xdcp, Low Power Two-wire Interface, Single Supply |
| Company: | Xicor, Inc. |
| Datasheet: | Download X9429YVI datasheet File size : 607 kB |
| Request For quote: | Find where to buy X9429YVI
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Datasheet text preview:
APPLICATION NOTES AVAILABLE
AN99 ˇ AN115 ˇ AN120 ˇ AN124 ˇ AN133 ˇ AN134 ˇ AN135
Low Noise/Low Power/2-Wire Bus
X9429
Single Digitally Controlled Potentiometer (XDCPTM)
FEATURES ˇ Single Voltage Potentiometer ˇ 64 Resistor Taps ˇ 2-wire Serial Interface for write, read, and transfer operations of the potentiometer ˇ Wiper Resistance, 150 Typical at 5V ˇ Non-Volatile Storage of Multiple Wiper Positions ˇ Power On Recall. Loads Saved Wiper Position on Power Up. ˇ Standby Current < 5ľA Max ˇ VCC : 2.7V to 5.5V Operation ˇ 2.5K, 10K Total Pot Resistance ˇ Endurance: 100, 000 Data Changes per Bit per Register ˇ 100 yr. Data Retention ˇ 14-Lead TSSOP, 16-Lead SOIC ˇ Low Power CMOS DESCRIPTION The X9429 integrates a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 63 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 2-wire bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and a 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.
BLOCK DIAGRAM
VCC
VH/RH
address data status 2-wire bus interface
write read transfer inc / dec
Bus Interface & Control
Power On Recall Wiper Counter Register (WCR) Data Registers 4 Bytes
wiper
10K 64-taps POT
control
VSS
VL/RL
VW/RW
REV 1.1.6 7/8/03
www.xicor.com
Characteristics subject to change without notice.
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X9429
DETAILED FUNCTIONAL DIAGRAM
VCC
Power On Recall
DR0 DR1
10K 64--taps
Control SCL SDA A3 A2 A0
WP
INTERFACE AND CONTROL CIRCUITRY
DR2 DR3
WIPER COUNTER REGISTER (WCR)
RH/VH
RL/VL RW/VW
DATA
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 1.1.6 7/8/03
www.xicor.com
Characteristics subject to change without notice.
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X9429
PIN CONFIGURATION
TSSOP NC NC NC A2 SCL SDA VSS 1 2 3 4 5 6 7 X9429 14 13 12 11 10 9 8 VCC RL/VL RH/VH RW/VW A3 A0 WP NC NC NC A2 SCL SDA NC VSS 1 2 3 4 5 6 7 8 X9429 SOIC 16 15 14 13 12 11 10 9 VCC NC RL/VL RH/VH RW/VW A3 A0 WP
PIN ASSIGNMENTS TSSOP pin
1 2 3 4 5 6 7 8 9 10 11 12 13 14
SOIC pin
1 2 3 4 5 6 8 9 10 11 12 13 14 16 15 7
Symbol
NC NC NC A2 SCL SDA VSS WP A0 A3 RW / VW RH / VH RL / VL VCC NC NC No Connect No Connect No Connect
Brief Description
Device Address for 2-wire bus. Serial Clock for 2-wire bus. Serial Data Input/Output for 2-wire bus. System Ground Hardware Write Protect Device Address for 2-wire bus. Device Address for 2-wire bus. Wiper Terminal of the Potentiometer. High Terminal of the Potentiometer. Low Terminal of the Potentiometer. System Supply Voltage No Connect No Connect
PIN DESCRIPTIONS Host Interface Pins Serial Clock (SCL) The SCL input is used to clock data into and out of the X9429. Serial Data (SDA) SDA is a bidirectional pin used to transfer data into and out of the device. It is an open drain output and may be wire-ORed with any number of open drain or open
REV 1.1.6 7/8/03
collector outputs. An open drain output requires the use of a pull-up resistor. For selecting typical values, refer to the guidelines for calculating typical values on the bus pull-up resistors graph. Device Address (A0, A2, A3) The Address inputs are used to set the least significant 3 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the Address input in order to initiate communication with the X9429. A maximum of 8 devices may occupy the 2-wire serial bus.
Characteristics subject to change without notice.
www.xicor.com
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