DS3903 Maxim Integrated Products, DS3903 Datasheet
DS3903
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DS3903 Summary of contents
Page 1
... It operates in both 3V and 5V systems, and it features a write-protect pin that can lock the positions of the potentiometers. An address pin allows two DS3903s to be placed on the same 2-wire bus. Power-Supply Calibration Mobile Phones and PDAs ...
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Triple 128-Position Nonvolatile Digital Potentiometer ABSOLUTE MAXIMUM RATINGS Voltage on V Pin Relative to Ground.................-0.5V to +6.0V CC Voltage on SDA, SCL, A0, and WP Relative to Ground ...........................................................-0.5V to Voltage on L0, L1, L2, W0, W1, W2, H0, H1, ...
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AC ELECTRICAL CHARACTERISTICS (V = 2.7V to 5.5V -40°C to +85°C PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between Stop and Start Conditions Hold Time (Repeated) Start Condition Low Period of SCL Clock High Period ...
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Triple 128-Position Nonvolatile Digital Potentiometer All voltages are referenced to ground. Note 1: I specified for V equal to 3.0V and 5.0V while control port logic pins are driven to the appropriate Note 2: STBY CC logic levels. Appropriate logic ...
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T CC WIPER RESISTANCE Ω vs. WIPER VOLTAGE (10k ) 350 300 250 200 150 100 CC POS 7Fh ...
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Triple 128-Position Nonvolatile Digital Potentiometer (VCC = 5.0V, 10kΩ plots apply to both pot0 and pot2 +25°C unless otherwise noted.) VOLTAGE-DIVIDER RELATIVE LINEARITY vs. WIPER SETTING (90k 0.05 0.04 0.03 0.02 0. WIPER SETTING ...
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... The address pin allows two DS3903s to be placed on the same 2-wire bus. With its low cost and small board space, the DS3903 is well tailored to replace larger mechanical potentiome- ters. This allows the automation of calibration in many instances because the 2-wire interface can easily be adjusted by test hardware ...
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... The master must then transmit an 8-bit data word to be written into this memory address. The DS3903 again transmits a zero for one clock cycle to acknowledge the receipt of the data byte. At this point, the master must terminate the write operation with a stop condition ...
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... This address stays valid between opera- tions as long as power is available. Once the device address is clocked in and acknowl- edged by the DS3903 with the R/W bit set to high, the current address data word is clocked out. The master does not respond with a zero, but does generate a stop condition afterwards ...
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... Slave Address: Command/control byte is the first byte received following the start condition from the master device. The command/control byte consists of a 6-bit control code. For the DS3903, this is set as 101000 binary for read/write operations. The next bit of the command/control byte is the device select bit or slave address (A0) ...
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... SDA line. Applications Information Power-Supply Decoupling To achieve the best results when using the DS3903, decouple the power supply with a 0.01µF or 0.1µF capacitor. Use a high-quality ceramic surface-mount capacitor if possible. Surface-mount components mini- mize lead inductance, which improves performance, and ceramic capacitors tend to have adequate high- frequency response for decoupling applications ...