X9418 Xicor, X9418 Datasheet
X9418
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X9418 Summary of contents
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... REV 1.1.5 7/23/02 X9418 DESCRIPTION The X9418 potentiometers (XDCP monolithic CMOS integrated microcircuit. The digitally 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 ...
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... The Address inputs are used to set the least significant 4 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the Address input in communication with the X9418. A maximum of 16 devices may occupy the 2-wire serial bus. Potentiometer Pins —V ...
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... Following a start condition the master must output the address of the slave it is accessing. The most significant four bits of the slave address are the device type identifier (refer to Figure 1 below). For the X9418 this is fixed as 0101[B]. Figure 1. Slave Address Device Type ...
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... ACK polling can be initiated immediately. This involves issuing the start condition followed by the device slave address. If the X9418 is still busy with the write operation no ACK will be returned. If the X9418 has completed the write operation an ACK will be returned, and the master can then proceed with the next operation ...
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... T The Increment/Decrement command is different from the other commands. Once the command is issued and the X9418 has responded with an acknowledge, the master can clock the selected wiper up and/or down in one segment steps; thereby, providing a fine tuning capability to the host. For each SCL clock pulse (t while SDA is HIGH, the selected wiper will move one Table 1 ...
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... X9418 Figure 4. Three-Byte Instruction Sequence SCL SDA Figure 5. Increment/Decrement Instruction Sequence SCL SDA Figure 6. Increment/Decrement Timing Limits INC/DEC CMD Issued SCL SDA REV 1.1.5 7/23/ ...
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... X9418 Figure 7. Acknowledge Response from Receiver SCL from Master Data Output from Transmitter Data Output from Receiver START Figure 8. Detailed Potentiometer Block Diagram Serial Data Path From Interface Circuitry Register 0 Register 2 If WCR = 00[H] then WCR = 3F[H] then ...
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... Finally loaded with the contents of its Data Register zero (DR0) upon power-up. The WCR is a volatile register; that is, its contents are lost when the X9418 is powered-down. Although the register is automatically loaded with the value in DR0 upon power-up, it should be noted this may be different from the value present at power-down ...
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... X9418 Instruction Format Notes: (1) “MACK”/”SACK”: stands for the acknowledge sent by the master/slave. (2) “A3 ~ A0”: stands for the device addresses sent by the master. (3) “X”: indicates that “0” for testing purpose but physically “don’t care” condition. ...
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... X9418 XFR Wiper Counter Register (WCR) to Data Register (DR) S device type device S T identifier addresses Increment/Decrement Wiper Counter Register (WCR) S device type device S T identifier addresses ...
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... -120 1.6 –1 –0.2 +0.2 ±300 TOTAL ±20 10/10/25 0.1 www.xicor.com Device Supply Voltage (V 5V ±10% X9418 X9418-2.7 2.7V to 5.5V Unit Test Conditions % 50 mW 25°C, each pot +3 mA Ω Wiper current = ± 1mA, V ±3V Ω Wiper current = ± 1mA, V ± dBV ...
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... X9418 D.C. OPERATING CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.) Symbol Parameter I V supply current CC1 CC (nonvolatile write supply current CC2 CC (move wiper, write, read current (standby Input leakage current LI I Output leakage current LO V Input HIGH voltage ...
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... X9418 A.C. TEST CONDITIONS I nput pulse levels V Input rise and fall times 10ns Input and output timing level V EQUIVALENT A.C. LOAD CIRCUIT 5V SDA Output AC TIMING (over recommended operating conditions) Symbol f Clock frequency SCL t Clock cycle time CYC t Clock high time HIGH t Clock low time ...
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... X9418 HIGH-VOLTAGE WRITE CYCLE TIMING Symbol t High-voltage write cycle time (store instructions) WR XDCP TIMING Symbol t Wiper response time after the third (last) power supply is stable WRPO t Wiper response time after instruction issued (all load instructions) WRL t Wiper response time from an active SCL/SCK edge (increment/decrement instruction) WRID Note: (8) A device must internally provide a hold time of at least 300ns for the SDA signal in order to bridge the undefi ...
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... X9418 XDCP Timing (for All Load Instructions) SCL SDA XDCP Timing (for Increment/Decrement Instruction) SCL SDA Wiper Register Address Write Protect and Device Address Pins Timing SCL SDA WP A0, A1 A2, A3 REV 1.1.5 7/23/02 LSB t WRL Inc/Dec t (START) (STOP) ... ...
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... X9418 APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits Noninverting Amplifier – (1 Offset Voltage Adjustment 100KΩ – + TL072 10KΩ 10KΩ 10KΩ +12V -12V REV 1 ...
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... X9418 Application Circuits (continued) Attenuator R 1 – All -1/2 ≤ G ≤ +1/2 Inverting Amplifier – – + REV 1.1.5 7/23/ 10kΩ Function Generator frequency ∝ R ...
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... X9418 PACKAGING INFORMATION Pin 1 Index Pin 1 Seating Plane 0.150 (3.81) 0.125 (3.18) 0.110 (2.79) 0.090 (2.29) Typ. 0.010 (0.25) NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH REV 1.1.5 7/23/02 24-Lead Plastic Dual In-Line Package Type P 1.265 (32.13) 1.230 (31.24) 1.100 (27.94) Ref. 0.065 (1.65) 0.040 (1.02) 0.625 (15.87) 0.600 (15.24) www.xicor.com ...
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... X9418 PACKAGING INFORMATION 24-Lead Plastic Small Outline Gull Wing Package Type S Pin 1 Index Pin 1 (4X) 7° 0.050 (1.27) 0.010 (0.25) 0.020 (0.50) 0° – 8° 0.015 (0.40) 0.050 (1.27) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.1.5 7/23/02 0.014 (0.35) 0.020 (0.50) 0.598 (15.20) 0.610 (15.49) X 45° 0.009 (0.22) 0.420" 0.013 (0.33) FOOTPRINT www ...
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... X9418 PACKAGING INFORMATION .026 (.65) BSC .303 (7.70) .311 (7.90) .0075 (.19) .0118 (.30) 0°–8° .020 (.50) .030 (.75) Detail A (20X) See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.1.5 7/23/02 24-Lead Plastic, TSSOP Package Type V .169 (4.3) .252 (6.4) BSC .177 (4.5) .047 (1.20) .002 (.06) .005 (.15) ...
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... X9418 Ordering Information X9418 Device LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. ...