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Renesas ISL23318WFRUZ-TK
- Part No.:
- ISL23318WFRUZ-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-UFQFN
- Datasheet:
-
ISL23318WFRUZ-TK.pdf
- Description:
- IC DGT POT 10KOHM 128TAP 10UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,092
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Product details
Overview
ISL23318WFRUZ-TK from Renesas Electronics is a volatile, low-voltage, I²C-compatible digitally controlled potentiometer (DCP) with 128 taps, 10kΩ total resistance, and UTQFN-10 package. It operates from 1.7V to 5.5V VCC and supports 1.2V–5.5V logic-level I²C bus via dedicated VLOGIC pin, enabling direct interface with ultra-low-voltage microcontrollers. It delivers ±0.15 LSB integral nonlinearity and 70Ω typical wiper resistance at 3.3V, targeting precision trimming in battery-powered sensor and power supply circuits.
For engineers reviewing the ISL23318WFRUZ-TK datasheet, ISL23318WFRUZ-TK pinout, ISL23318WFRUZ-TK application, or ISL23318WFRUZ-TK equivalent, key selection criteria include its dual-supply I²C interface (VLOGIC independent of VCC), shutdown mode with internal RW–RL short, mid-scale power-on default, and guaranteed monotonicity across –40°C to +125°C industrial temperature range.
Technical Context
The ISL23318WFRUZ-TK implements a resistor ladder with CMOS switches and a volatile 7-bit Wiper Register (WR), directly accessible via I²C. Its "make-before-break" switching ensures glitch-free wiper transitions, and the WR defaults to 0x40 (64 decimal) at power-up, positioning the wiper at mid-scale.
It features two independent supply domains: VCC powers analog circuitry (1.7V–5.5V), while VLOGIC (1.2V–5.5V) supplies the I²C interface and level shifter-enabling interoperability with sub-1.8V controllers without external level translation. Shutdown mode (via ACR[6]) opens RH–RL and shorts RW to RL through ~2kΩ, reducing current to <2.8µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - fixed end-to-end resistance for predictable voltage divider or rheostat operation |
| Tap Count | 128 taps - provides 7.8mV/LSB resolution in 3.3V full-scale voltage divider mode |
| INL / DNL | ±0.15 LSB - guarantees monotonic response and high linearity for closed-loop calibration |
| VLOGIC Range | 1.2V to 5.5V - enables direct connection to low-voltage I²C masters (e.g., 1.8V or 1.2V MCUs) |
| Wiper Resistance | 70Ω typical at VCC = 3.3V - minimizes signal attenuation and loading error in precision gain-setting paths |
| Shutdown Current | <2.8µA max - supports ultra-low-power sleep states in portable instrumentation |
| Temp Range | –40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment sensor nodes |
Pinout & Package
ISL23318WFRUZ-TK is packaged in a Pb-free, RoHS-compliant 10-lead UTQFN (2.1mm × 1.6mm, 0.5mm pitch). The package supports high-density PCB layouts and offers θJA = 145°C/W for thermal efficiency in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RL | DCP low terminal | Fixed end of resistor ladder; referenced to GND in voltage divider mode; used with RW in rheostat configuration |
| RW | DCP wiper terminal | Movable tap output; position set by volatile Wiper Register; exhibits 70Ω typical on-resistance |
| RH | DCP high terminal | Fixed end of resistor ladder; connected to VCC in standard divider; open in rheostat mode |
| VCC | Analog power supply | Supplies core DCP and register logic; 1.7V–5.5V range supports single-supply systems |
| GND | Ground reference | Common return for analog and digital domains; must be low-impedance for noise-sensitive trimming |
| SCL | I²C clock input | Open-drain input requiring external pull-up; supports up to 400kHz standard-mode I²C |
| SDA | I²C data I/O | Open-drain bidirectional bus line; transmits ACK/NACK and reads/writes WR/ACR registers |
| A0, A1 | I²C slave address pins | Hardwired inputs setting LSBs of 7-bit address; enable up to four devices on same I²C bus |
| VLOGIC | I²C logic supply | Independent 1.2V–5.5V rail for bus interface; decouples logic compatibility from analog supply |
Key Features
| Feature | Design Value |
|---|---|
| Volatile Wiper Register (WR) | 7-bit register (0x00–0x7F) directly readable/writable over I²C; resets to 0x40 at power-on for known startup state |
| Dual-Supply I²C Interface | VLOGIC pin allows 1.2V logic compatibility without level shifters-critical for interfacing with modern ultra-low-voltage MCUs |
| Shutdown Mode | ACR[6] bit forces RH–RL open-circuit and internally shorts RW to RL (~2kΩ), reducing system leakage and enabling safe power gating |
| Monotonic Performance | Guaranteed monotonicity with ±0.15 LSB DNL ensures no code skips or reversals during wiper sweeps-essential for closed-loop stability |
| Low Wiper Resistance | 70Ω typical at 3.3V minimizes insertion loss and gain error in op-amp feedback networks and sensor biasing paths |
Applications
| Gain Adjustment in Portable Instruments | Trimming Sensor Signal Chains |
|---|---|
Use Scenario: Calibrating gain of low-power op-amp stages in handheld multimeters or environmental sensors. IC Role / Device Role / Timing Role: Digitally programmable resistor in op-amp feedback loop, replacing mechanical trimpots. Use Value: Enables factory and field recalibration via I²C without physical access; 10kΩ value matches common transimpedance amplifier designs. |
Use Scenario: Compensating offset and span drift in bridge-based pressure or temperature sensors. IC Role / Device Role / Timing Role: Precision rheostat in Wheatstone bridge leg or op-amp offset null path. Use Value: ±0.15 LSB INL ensures stable calibration across –40°C to +125°C; low 70Ω wiper resistance avoids measurement error. |
| Power Supply Margining | RF Power Amplifier Bias Control |
Use Scenario: Dynamically adjusting feedback resistors in DC/DC converter error amplifiers during production test. IC Role / Device Role / Timing Role: Voltage divider element setting reference voltage for regulation loop. Use Value: Mid-scale power-on default (64) ensures safe startup; shutdown mode isolates circuit during standby. |
Use Scenario: Setting quiescent current in GaAs or LDMOS RF power amplifier bias networks. IC Role / Device Role / Timing Role: Low-noise, low-TCR rheostat controlling gate/base bias voltage. Use Value: 175ppm/°C end-to-end TCR and 8ppm/°C ratiometric TCv maintain stable bias over temperature; 1200kHz cutoff supports RF-adjacent placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5170BRMZ-10 | Nonvolatile EEPROM memory; 256 taps; SPI interface only; 10kΩ; MSOP-10 | Requires no host initialization at power-up; unsuitable for dynamic real-time adjustment due to write latency | Choose AD5170BRMZ-10 when persistent settings are mandatory and SPI is available; avoid if I²C or ultra-low-power shutdown is required. |
| MCP45HV51-103E/MS | High-voltage (18V) tolerant; 256 taps; I²C; 10kΩ; MSOP-8; no VLOGIC pin | Lacks independent logic supply-requires VDD ≥ 2.7V for I²C, limiting use with sub-1.8V controllers | Choose MCP45HV51-103E/MS for high-voltage biasing where VDD ≥ 2.7V is guaranteed; avoid when 1.2V I²C compatibility is needed. |
Compared with AD5170BRMZ-10 and MCP45HV51-103E/MS, the ISL23318WFRUZ-TK uniquely combines 1.2V I²C compatibility, 10kΩ monotonic DCP performance, and sub-3µA shutdown-making it optimal for battery-powered, thermally demanding, and low-voltage embedded trimming.
Availability
ISL23318WFRUZ-TK is available at Aetrix Electronics and suitable for gain calibration in portable test equipment, sensor offset trimming in industrial IoT nodes, and power supply margining in automotive ECUs requiring stable component supply across extended temperature and long production lifecycles.
Supply support for ISL23318WFRUZ-TK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader delivering high-performance, reliable analog and mixed-signal solutions for industrial, automotive, and infrastructure markets.
The ISL23318 series is designed specifically for precision, low-power, digitally programmable resistance in space- and energy-constrained systems-emphasizing I²C flexibility, wide supply tolerance, and robustness across extreme temperatures.
FAQ
What is the default wiper position of the ISL23318WFRUZ-TK at power-up?
The ISL23318WFRUZ-TK powers up with its volatile Wiper Register (WR) preset to 0x40 (64 decimal), placing the wiper at mid-scale-i.e., approximately 5kΩ between RL and RW, and 5kΩ between RW and RH in a 10kΩ device. This ensures a known, safe startup state for voltage divider or rheostat configurations without host initialization.
Does the ISL23318WFRUZ-TK support true 1.2V I²C communication?
Yes-the ISL23318WFRUZ-TK features a dedicated VLOGIC pin that accepts 1.2V to 5.5V, enabling direct connection to 1.2V I²C masters without level shifters. Its input thresholds scale with VLOGIC (VIH = 0.7×VLOGIC, VIL = 0.3×VLOGIC), and it draws only 5µA ILOGIC at 1.2V/1.7V, confirming true low-voltage bus compatibility.
How does shutdown mode affect the terminals of the ISL23318WFRUZ-TK?
In shutdown mode (activated by setting ACR[6]), the ISL23318WFRUZ-TK opens the RH–RL path and internally connects RW to RL through a ~2kΩ resistor. This isolates the high-side terminal while providing a defined low-impedance path at the wiper-preventing floating nodes and reducing total current to <2.8µA, ideal for system-level power gating.
Can the ISL23318WFRUZ-TK be used in rheostat mode, and what are its linearity specs?
Yes-the ISL23318WFRUZ-TK supports rheostat mode (RW–RL or RW–RH). In 10kΩ configuration, it guarantees ±0.15 MI differential nonlinearity and ±1.0 MI integral nonlinearity over temperature, with monotonicity ensured. Its 70Ω typical wiper resistance minimizes insertion error in current-setting or bias-adjustment applications.
What package type and footprint does the ISL23318WFRUZ-TK use?
The ISL23318WFRUZ-TK uses a 10-lead UTQFN package (2.1mm × 1.6mm, 0.5mm pitch, exposed pad), designated as "WFRUZ" in Renesas ordering nomenclature. This compact, thermally enhanced RoHS-compliant package supports high-density layouts and achieves θJA = 145°C/W-critical for fanless industrial and automotive modules.
ISL23318WFRUZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 10-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 128
- Resistance (Ohms):
- 10k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 175ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-UTQFN (2.1x1.6)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23318WFRUZ-TK FAQ
1.How can I place an order for ISL23318WFRUZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23318WFRUZ-TK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL23318WFRUZ-TK reliable?
The price and inventory of ISL23318WFRUZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23318WFRUZ-TK is usually 5 days.
3.What payment methods are accepted for ISL23318WFRUZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23318WFRUZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23318WFRUZ-TK?
ISL23318WFRUZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23318WFRUZ-TK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL23318WFRUZ-TK?
For technical support, including ISL23318WFRUZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23318WFRUZ-TK requirements.
6.How does Aetrix verify that ISL23318WFRUZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL23318WFRUZ-TK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL23318WFRUZ-TK meets industry standards.
7.What is the process for return or replacement of ISL23318WFRUZ-TK?
All ISL23318WFRUZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL23318WFRUZ-TK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL23318WFRUZ-TK part is unused and in its original packaging.
Return procedure for ISL23318WFRUZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23318WFRUZ-TK Tags
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MCP4018T-103E/LT
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MCP4011T-103E/SN
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