Features
- Solid-state potentiometer
- 3-wire serial interface
- Terminal voltage, 0 to +8V
- 100 wiper tap points
- Wiper position stored in nonvolatile memory and recalled on power-up
- 99 resistive elements
- Temperature compensated
- End to end resistance range ± 20%
- Low power CMOS
- VCC = 5V
- Active current, 3mA max.
- Standby current, 1mA max.
- High reliability
- Endurance, 100,000 data changes per bit
- Register data retention, 100 years
- RTOTAL value = 10kΩ
- Packages
- 8 Ld SOIC and DIP
- Pb-free plus anneal available (RoHS compliant)
X9318 Functional Diagram
Description
The Intersil X9318 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a 3-wire interface. The potentiometer is implemented by a resistor array composed of 99 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the CS, U/D, and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation. The device can be used as a three-terminal potentiometer for voltage control or as a two-terminal variable resistor for current control in a wide variety of applications.
Parameters
| Attributes | Value |
|---|---|
| Resistance Taper | Linear |
| Taps (#) | 100 |
| Resistance Options (kΩ) | 10 |
| Channels (#) | 1 |
| Interface | 3-Wire (Up/Down) |
| Memory Type | Nonvolatile |
| Vcc (V) | 4.5 to 5.5 |
| Supply Current Icc (µA) | 300 |
| Single Supply Voltage Range (V) | 8 |
| Wiper Current (mA) | 3 |
| Wiper Resistance (ohms) | 40 |
| VL Terminal Voltage (Max) (V) | 8 |
| End-to-End Temperature Coefficient (ppm/°C) | 300 |
| Middlepoint Ratiometric Tempco | 20 |
| Advanced Features | Internal charge pump to generate terminal voltage capability greater than VCC |
| Qualification Level | Standard |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| SOICN | 4.9 x 3.9 x 0.00 | 8 | 1.3 |
Applications
- LCD bias control
- DC bias adjustment
- Gain and offset trim
- Laser diode bias control
- Voltage regulator output control
| Part Number | Status | Samples | Stock | RoHS | Package | Budgetary Price (USD) | Carrier Type | Moisture Sensitivity Level (MSL) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|
| X9318WS8IZ | Active | Available | In Stock | RoHS:EN | SOIC | 1ku | $5.81 | Tube | 1 | MALAYSIA, THAILAND | USA |
| X9318WS8IZT1 | Active | N/A | Out of Stock | RoHS:EN | SOIC | 1ku | $5.81 | Reel | 1 | MALAYSIA, THAILAND | USA |
| X9318WS8Z | Active | Available | In Stock | RoHS:EN | SOIC | 1ku | $5.81 | Tube | 1 | MALAYSIA, THAILAND | USA |
| X9318WS8ZT1 | Active | N/A | Out of Stock | RoHS:EN | SOIC | 1ku | $5.81 | Reel | 1 | MALAYSIA, THAILAND | USA |
| X9318WP8 | Obsolete | N/A | Out of Stock | Contact | PDIP | Tube | ||||
| X9318WP8I | Obsolete | N/A | Out of Stock | Contact | PDIP | Tube | ||||
| X9318WP8IZ | Obsolete | N/A | Out of Stock | Contact | PDIP | Tube | Not Applicable | |||
| X9318WS8 | Obsolete | N/A | Out of Stock | Contact | SOICN | Tube | ||||
| X9318WS8I | Obsolete | N/A | Out of Stock | Contact | SOICN | Tube | ||||
| X9318WS8IT1 | Obsolete | N/A | Out of Stock | Contact | SOICN | Reel | ||||
| X9318WS8T1 | Obsolete | N/A | Out of Stock | Contact | SOICN | Reel |
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- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- Product Change NoticePDF 237 KB PCN13065 Dec 24, 2013
- Product Change NoticePDF 204 KB PCN13058 Nov 04, 2013
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Application NotePDF 281 KB an1425 May 22, 2008AI-generated Summary: Digitally Controlled Potentiometers (DCPs) offer precise resistance control with configurations in both serial and parallel modes, featuring fixed resistors and various resistance options. The ISL22317 model provides 1% precision with 128 taps and can function as a two-terminal variable resistor or three-terminal potentiometer, delivering high accuracy and low temperature coefficient. DCPs can outperform DACs in fine tuning within limited ranges, offering better resolution with fewer bits. Resolution varies with voltage and tap count, as detailed in the provided tables. Usage guidelines and liability disclaimers emphasize proper application and safety considerations.
- Application NotePDF 750 KB an139 Jun 30, 2005AI-generated Summary: The document details the design of power supplies using Intersil’s XDCP mixed signal products. It explains four key circuit schematics: Front End, Power Mesh, Secondary Control, and Primary Control, highlighting their interconnections. The Front End converts AC line power to an unregulated 320V DC, incorporating protection and EMI filtering components. The Power Mesh is a single switch forward DC/DC converter that regulates 320V DC to 12V DC at 10A, using a cascode transistor arrangement and a digitally controlled switching frequency to meet EMI requirements.
- Application NotePDF 534 KB an133 Jun 06, 2005AI-generated Summary: The document explains how digitally controlled potentiometers (XDCPs) enable programmability in amplifier circuits by adjusting cutoff frequency and gain. It details the design of a non-inverting amplifier with variable resistors forming an RC low pass filter and gain control. Techniques to reduce potentiometer resistance for high-frequency applications are described, allowing gain from 1 to 2 and cutoff frequency from 130kHz to over 1MHz. The amplifier’s parameters are controlled via a serial bus, enabling computer-based customization.
- Application NotePDF 467 KB an1149 May 03, 2005AI-generated Summary: The document details circuits using Intersil digitally controlled potentiometers (X9C103, X9312) combined with op amps (LT1226, OP37, LT1028) for applications like null adjustment, amplifier biasing, and proportional-integral temperature control. It explains modes controlled by NADJ/ADJ signals, automatic nulling via feedback loops, and bias stabilization in high-output buffer amplifiers. The circuits optimize gain, bandwidth, noise, and minimize distortion and power consumption. It also covers clocking options for nulling and temperature control using digital potentiometers and comparators.
- Application NotePDF 280 KB an1157 Apr 29, 2005AI-generated Summary: Digitally controlled potentiometers (XDCPs) enable precise power supply and DC to DC converter control by allowing cascading configurations for fine and coarse voltage adjustments. These devices store wiper settings in nonvolatile memory, ensuring long-term reliability and simplifying manufacturing and testing. XDCPs improve repeatability, reduce human error, and enhance resistance to environmental stress, making them superior to mechanical potentiometers in power applications.
- Application NotePDF 324 KB an124 Apr 27, 2005AI-generated Summary: Digitally-controlled potentiometers have key analog parameters including number of taps (16 to 256), end-to-end resistance (1kΩ to 1MΩ), wiper resistance (~40Ω), wiper current (1-3mA), power rating (10-50mW), resolution, noise, linearity, and temperature coefficients. Voltage limits range from ±5V to ±15V on pins. Absolute linearity ensures accuracy within one least significant bit, while relative linearity guarantees tap-to-tap accuracy within 0.2 LSB. Temperature coefficients affect resistance stability. Various circuit techniques exist to mitigate these limitations. The document also includes usage notices, quality grades, and liability disclaimers from Renesas Electronics.
Recommended Documents (1)
Datasheets (1)
- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
Manuals & Guides (1)
- Application NotePDF 281 KB an1425 May 22, 2008AI-generated Summary: Digitally Controlled Potentiometers (DCPs) offer precise resistance control with configurations in both serial and parallel modes, featuring fixed resistors and various resistance options. The ISL22317 model provides 1% precision with 128 taps and can function as a two-terminal variable resistor or three-terminal potentiometer, delivering high accuracy and low temperature coefficient. DCPs can outperform DACs in fine tuning within limited ranges, offering better resolution with fewer bits. Resolution varies with voltage and tap count, as detailed in the provided tables. Usage guidelines and liability disclaimers emphasize proper application and safety considerations.
- Application NotePDF 750 KB an139 Jun 30, 2005AI-generated Summary: The document details the design of power supplies using Intersil’s XDCP mixed signal products. It explains four key circuit schematics: Front End, Power Mesh, Secondary Control, and Primary Control, highlighting their interconnections. The Front End converts AC line power to an unregulated 320V DC, incorporating protection and EMI filtering components. The Power Mesh is a single switch forward DC/DC converter that regulates 320V DC to 12V DC at 10A, using a cascode transistor arrangement and a digitally controlled switching frequency to meet EMI requirements.
- Application NotePDF 534 KB an133 Jun 06, 2005AI-generated Summary: The document explains how digitally controlled potentiometers (XDCPs) enable programmability in amplifier circuits by adjusting cutoff frequency and gain. It details the design of a non-inverting amplifier with variable resistors forming an RC low pass filter and gain control. Techniques to reduce potentiometer resistance for high-frequency applications are described, allowing gain from 1 to 2 and cutoff frequency from 130kHz to over 1MHz. The amplifier’s parameters are controlled via a serial bus, enabling computer-based customization.
- Application NotePDF 467 KB an1149 May 03, 2005AI-generated Summary: The document details circuits using Intersil digitally controlled potentiometers (X9C103, X9312) combined with op amps (LT1226, OP37, LT1028) for applications like null adjustment, amplifier biasing, and proportional-integral temperature control. It explains modes controlled by NADJ/ADJ signals, automatic nulling via feedback loops, and bias stabilization in high-output buffer amplifiers. The circuits optimize gain, bandwidth, noise, and minimize distortion and power consumption. It also covers clocking options for nulling and temperature control using digital potentiometers and comparators.
- Application NotePDF 280 KB an1157 Apr 29, 2005AI-generated Summary: Digitally controlled potentiometers (XDCPs) enable precise power supply and DC to DC converter control by allowing cascading configurations for fine and coarse voltage adjustments. These devices store wiper settings in nonvolatile memory, ensuring long-term reliability and simplifying manufacturing and testing. XDCPs improve repeatability, reduce human error, and enhance resistance to environmental stress, making them superior to mechanical potentiometers in power applications.View More (14)
Application Notes & White Papers (14)
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- Product Change NoticePDF 237 KB PCN13065 Dec 24, 2013View More (7)
Product Notices (PCN, EOL, etc) (7)
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Knowledge Base
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What is the default wiper tap position for X93xx series of DCPs?
Question:What is the default wiper tap position for these parts? Answer: See table below: P/N # Taps Default Tap Position X9313 32 0 X9314 32 0 X9315 32 0 X9317 100 99 X9318 100 0 X9319 100 0
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