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Details, datasheet, quote on part number:X9259-2.7
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| Part: | X9259-2.7 |
| Category: | Analog & Mixed-Signal Processing => Potentiometers => Digital Potentiometers |
| Description: | Quad Digitally-controlled (XDCP™)Potentiometers |
| Company: | Xicor, Inc. |
| Datasheet: | Download X9259-2.7 datasheet File size : 416 kB |
| Request For quote: | Find where to buy X9259-2.7
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Datasheet text preview:
APPLICATION NOTES AND DEVELOPMENT SYSTEM AVAILABLE
AN99 · AN115 · AN124 ·AN133 · AN134 · AN135
Single Supply / Low Power / 256-tap / 2-Wire bus
X9259
Quad Digitally-Controlled (XDCPTM) Potentiometers
FEATURES · QuadFour separate potentiometers · 256 resistor taps/pot0.4% resolution · 2-Wire Serial Interface for write, read, and transfer operations of the potentiometer · Wiper Resistance, 100 typical @ VCC = 5V · 4 Nonvolatile Data Registers for Each Potentiometer · Nonvolatile Storage of Multiple Wiper Positions · Power On Recall. Loads Saved Wiper Position on Power Up. · Standby Current < 5µA Max · VCC: 2.7V to 5.5V Operation · 50K, 100K versions of End to End Pot Resistance · Endurance: 100,000 Data Changes per Bit per Register · 100 yr. Data Retention · Single Supply Version of X9258 · 24-Lead SOIC, 24-Lead TSSOP, 24-Lead CSP (Chip Scale Package) · Low Power CMOS DESCRIPTION The X9259 integrates 4 digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 255 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. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and a four nonvolatile 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
RH0
RH1
RH2
RH3
2-Wire Bus Interface
Address Data Status
Write Read Transfer Inc/Dec Bus Interface and Control Control
Power On Recall Wiper Counter Registers (WCR) Data Registers 16 Bytes
VSS
RW0
RL0
RW1
RL1 RW2
RL2 RW3
RL3
50K or 100K versions
REV 1.2.6 2/6/03
www.xicor.com
Characteristics subject to change without notice.
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X9259
DETAILED FUNCTIONAL DIAGRAM
RH0 RL0 RW0 VCC Power On Recall
DR0 DR1
Pot 0 Wiper Counter Register (WCR)
Power On Recall
DR0 DR1
DR2 DR3
DR2 DR3
Wiper Counter Register (WCR)
Resistor Array Pot 2
RH2
SCL SDA A3 A2 A1 A0 WP Data INTERFACE AND CONTROL CIRCUITRY
RL2 RW2
8 Power On Recall
DR0 DR1
50K and 100K 256-taps Power On Recall Wiper Counter Register (WCR) Resistor Array Pot 1
DR0 DR1
RW3 Wiper Counter Register (WCR) Resistor Array Pot 3 RH3
DR2 DR3
DR2 DR3
RL3
VSS
RL1 RH1 RW1
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
REV 1.2.6 2/6/03
www.xicor.com
Characteristics subject to change without notice.
2 of 25
X9259
PIN CONFIGURATION
SOIC/TSSOP NC1 A0 RW3 RH3 RL3 NC VCC RL0 RH0 RW0 A2 WP 1 2 3 4 5 6 7 8 9 10 11 12 X9259 24 23 22 21 20 19 18 17 16 15 14 13 A3 SCL RL2 RH2 RW2 NC VSS RW1 RH1 RL1 A1 SDA
F Top ViewBumps Down E R W3 A0 SCL RL2 D RL3 NC1 A3 R W2 C NC RH3 R H2 NC B VCC RH0 R H1 VSS A 1 R W0 2 A2
CSP
3 A1 4 RL1 R W1
RL0
WP
SDA
PIN ASSIGNMENTS Pin Pin (SOIC/TSSOP) (CSP)
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 22 23 24 6, 19 1 F2 F1 D2 E1 E2 C1 B1 C2 A1 A2 B2 B3 A3 A4 C3 B4 C4 E4 D3 F4 F3 E3 D1, D4 E2
Symbol
A0 RW3 RH3 RL3 NC1 VCC RL0 RH0 RW0 A2 WP SDA A1 RL1 RH1 RW1 VSS RW2 RH2 RL2 SCL A3 NC NC1
Function
Device Address for 2-Wire bus. (See Note 1) Wiper Terminal for Potentiometer 3. High Terminal for Potentiometer 3. Low Terminal for Potentiometer 3. Must be left unconnected System Supply Voltage Low Terminal for Potentiometer 0. High Terminal for Potentiometer 0. Wiper Terminal for Potentiometer 0. Device Address for 2-Wire bus. (See Note 1) Hardware Write Protect Serial Data Input/Output for 2-Wire bus. Device Address for 2-Wire bus. (See Note 1) Low Terminal for Potentiometer 1. High Terminal for Potentiometer 1. Wiper Terminal for Potentiometer 1. System Ground WiperTerminal for Potentiometer 2. High Terminal for Potentiometer 2. Low Terminal for Potentiometer 2. Serial Clock for 2-Wire bus. Device Address for 2-Wire Bus. (See Note 1) No Connect Must be left unconnected
Note 1: A0-A3 Device address pins must be tie to a logic level. REV 1.2.6 2/6/03
www.xicor.com
Characteristics subject to change without notice.
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