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TPL0401B-10QDCKRQ1 Datenblatt(PDF) 11 Page - Texas Instruments |
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TPL0401B-10QDCKRQ1 Datenblatt(HTML) 11 Page - Texas Instruments |
11 / 31 page TPL0401A/B-10-Q1 I 2C INTERFACE WIPER REGISTER SCL SDA GND VDD W H Copyright © 2016, Texas Instruments Incorporated 11 TPL0401A-10-Q1 TPL0401B-10-Q1 www.ti.com SLIS182 – NOVEMBER 2016 Product Folder Links: TPL0401A-10-Q1 TPL0401B-10-Q1 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated 9 Detailed Description 9.1 Overview The TPL0401x-10-Q1 has a single linear-taper digital potentiometer with 128 wiper positions and an end-to-end resistance of 10 kΩ. The potentiometer can be used as a three-terminal potentiometer. The main operation of TPL0401x-10-Q1 is in voltage divider mode. The low (L) terminal of the TPL0401x-10-Q1 is tied directly to GND. The high (H) and low (GND) terminals of TPL0401-10-Q1 are equivalent to the fixed terminals of a mechanical potentiometer. The H terminal must have a higher voltage than the low terminal (GND). The position of the wiper (W) terminal is controlled by the value in the Wiper Resistance (WR) 8-bit register. When the WR register contains all zeroes (zero-scale), the wiper terminal is closest to its L terminal. As the value of the WR register increases from all zeroes to all ones (full- scale), the wiper moves from the position closest to the GND terminal to the position closest to the H terminal. At the same time, the resistance between W and GND increases, whereas the resistance between W and H decreases. 9.2 Functional Block Diagram 9.3 Feature Description The TPL0401x-10-Q1 device is a single-channel, linear taper digital potentiometer with 128 wiper positions. Default power up state for the TPL0401x-10-Q1 is mid code (0×40). The TPL0401x-10-Q1 has the low terminal connected to GND internally. The position of the wiper can be adjusted using an I2C interface. The TPL0401x-10- Q1 is available in a 6-pin SOT package with a specified temperature range of –40°C to +125°C. The part has a 10-kΩ end-to-end resistance and can operate with a supply voltage range of 2.7 V to 5.5 V. This kind of product is widely used in setting the voltage reference for low power DDR3 memory. The TPL0401x-10-Q1 has the low terminal internal and connected to GND. 9.4 Device Functional Modes 9.4.1 Voltage Divider Mode The digital potentiometer generates a voltage divider when all three terminals are used. The voltage divider at wiper-to-H and wiper-to-GND is proportional to the input voltage at H to L (see Figure 11). |
Ähnliche Teilenummer - TPL0401B-10QDCKRQ1 |
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Ähnliche Beschreibung - TPL0401B-10QDCKRQ1 |
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