x9268us24c7979 Intersil Corporation, x9268us24c7979 Datasheet
x9268us24c7979
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x9268us24c7979 Summary of contents
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Data Sheet Dual Digitally-Controlled (XDCP™) Potentiometers FEATURES • Dual–Two Separate Potentiometers • 256 Resistor Taps/Pot–0.4% Resolution • 2-Wire Serial Interface for Write, Read, and Transfer Operations of the Potentiometer • Wiper Resistance, 100Ω typical @ V+ = 5V, V- ...
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Ordering Information PART PART NUMBER MARKING X9268TS24 X9268TS X9268TS24Z (Note) X9268TS Z X9268TS24I X9268TS I X9268TS24IZ (Note) X9268TS ZI X9268US24 X9268US X9268US24Z (Note) X9268US Z X9268US24I X9268US I X9268US24IZ (Note) X9268US ZI X9268TS24I-2.7 X9268TS G X9268TS24IZ-2.7 (Note) X9268TS ZG *Add ...
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DETAILED FUNCTIONAL DIAGRAM SCL SDA 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 ...
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PIN CONFIGURATION PIN ASSIGNMENTS Pin (SOIC) Symbol Connect 2 A0 Device Address for 2-Wire bus Connect Connect Connect 6 V+ Analog Suppy Pin (Positive System Supply ...
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PIN DESCRIPTIONS Bus Interface Pins (SDA) ERIAL ATA NPUT UTPUT The SDA is a bidirectional serial data input/output pin for a 2-Wire slave device and is used to transfer data into and out of the device. ...
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PRINCIPLES OF OPERATION The X9268 is a integrated microcircuit incorporating four resistor arrays and their associated registers and counters and the serial interface logic providing direct communication between the host and the digitally controlled potentiometers. This section provides detail description ...
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SERIAL INTERFACE DESCRIPTION Serial Interface The X9268 supports a bidirectional bus oriented protocol. The protocol defines any device that sends data onto the bus as a transmitter and the receiving device as the receiver. The device controlling the transfer is ...
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Acknowledge Polling The disabling of the inputs, during the internal nonvolatile write operation, can be used to take advantage of the typical 5ms nonvolatile write cycle time. Once the stop condition is issued to indicate the end of the nonvolatile ...
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Table 1. Identification Byte Format Device Type Identifier ID3 ID2 ID1 (MSB) Table 2. Instruction Byte Format Instruction Opcode (MSB) Table 3. Instruction Set Instruction I3 Read Wiper Counter 1 Register Write Wiper Counter ...
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DEVICE DESCRIPTION Wiper Counter Register (WCR) The X9268 contains two Wiper Counter Registers, one for each DCP potentiometer. The Wiper Counter Register can be envisioned as a 8-bit parallel and serial load counter with its outputs decoded to select one ...
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DEVICE DESCRIPTION Instructions Four of the nine instructions are three bytes in length. These instructions are: – Read Wiper Counter Register – read the current wiper position of the selected potentiometer, – Write Wiper Counter Register – change current wiper ...
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Figure 3. Two-Byte Instruction Sequence SCL SDA ID3 ID2 ID1 ID0 Device ID T Figure 4. Three-Byte Instruction Sequence SCL SDA ID3 ID2 ID1 ID0 ...
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INSTRUCTION FORMAT Read Wiper Counter Register (WCR) Device Type Device S Identifier Addresses Write Wiper Counter Register (WCR) Device Type Device S Identifier Addresses ...
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Global XFR Wiper Counter Register (WCR) to Data Register (DR) S Device Type Device T Identifier Addresses Transfer Wiper Counter Register (WCR) to Data Register (DR) S Device Type ...
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ABSOLUTE MAXIMUM RATINGS Temperature under bias .................... -65°C to +135°C Storage temperature ......................... -65°C to +150°C Voltage on SDA, SCL or any address input with respect to V ................................. -1V to +7V SS Voltage on V+ (referenced ...
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D.C. OPERATING CHARACTERISTICS Symbol Parameter I V supply current CC1 CC (active supply current CC2 CC (nonvolatile write current (standby Input leakage current LI I Output leakage current LO V Input HIGH voltage ...
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EQUIVALENT A.C. LOAD CIRCUIT 5V 1533Ω SDA pin 100pF AC TIMING Symbol f Clock Frequency SCL t Clock Cycle Time CYC t Clock High Time HIGH t Clock Low Time LOW t Start Setup Time SU:STA t Start Hold Time ...
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TIMING DIAGRAMS Start and Stop Timing (START) SCL t SU:STA SDA Input Timing t CYC SCL SDA Output Timing SCL SDA 18 X9268 HD:STA SU:DAT t AA (STOP) t SU:STO t F ...
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XDCP Timing (for All Load Instructions) SCL SDA VWx Write Protect and Device Address Pins Timing SCL SDA WP A0 X9268 LSB t WRL (START) (STOP) ... (Any Instruction) ... ... t t SU:WPA HD:WPA (STOP) FN8172.4 August ...
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APPLICATIONS INFORMATION Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits Noninverting Amplifier – (1 Offset Voltage Adjustment R 1 ...
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Application Circuits (continued) Attenuator – -1/2 ≤ G ≤ +1/2 Inverting Amplifier ...
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... Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...