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Renesas ISL23318WFUZ-T7A
- Part No.:
- ISL23318WFUZ-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL23318WFUZ-T7A.pdf
- Description:
- IC DGTL POT 10KOHM 128TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,447
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Product details
Overview
ISL23318WFUZ-T7A from Renesas Electronics is a volatile, low-voltage, 128-tap digitally controlled potentiometer (XDCP™) with I²C interface, 10kΩ total resistance, ±0.15 LSB integral nonlinearity, and operation from 1.7V VCC / 1.2V VLOGIC - used for precision gain adjustment in battery-powered instrumentation and sensor trimming circuits.
For engineers reviewing the ISL23318WFUZ-T7A datasheet, ISL23318WFUZ-T7A pinout, ISL23318WFUZ-T7A application, or ISL23318WFUZ-T7A equivalent, key selection factors include its dual-supply I²C compatibility (VLOGIC independent of VCC), shutdown mode with internal RW–RL short, mid-scale power-on default, and UTQFN-10 package optimized for space-constrained industrial designs.
Technical Context
The ISL23318WFUZ-T7A implements a monolithic CMOS resistor ladder with CMOS wiper switches and volatile 7-bit Wiper Register (WR), enabling precise digital control of resistance between RH–RW and RW–RL terminals. Its "make-before-break" switching ensures glitch-free transitions during tap changes.
It features dedicated VLOGIC pin supporting 1.2V–5.5V logic supply independent of analog VCC (1.7V–5.5V), allowing direct interfacing with ultra-low-voltage microcontrollers without level shifters. Two address pins (A0/A1) support up to four devices on a single I²C bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines full-scale voltage divider range and current-handling capability in rheostat mode. |
| Wiper Resistance | 70Ω typical at VCC = 3.3V - limits insertion loss and signal distortion in analog signal paths. |
| Integral Nonlinearity | ±0.15 LSB - ensures monotonic, high-accuracy voltage division across all 128 taps. |
| Supply Range (VCC) | 1.7V to 5.5V - enables operation from single Li-ion cells up to 5V rail systems. |
| Logic Supply (VLOGIC) | 1.2V to 5.5V - permits direct connection to 1.2V/1.8V/3.3V/5V I²C masters without translation. |
| Shutdown Current | <2.8µA max - preserves battery life in sleep-mode portable equipment. |
| Temperature Range | −40°C to +125°C - supports deployment in extended industrial and automotive under-hood environments. |
Pinout & Package
ISL23318WFUZ-T7A is packaged in a Pb-free, RoHS-compliant 10-lead UTQFN (2.1mm × 1.6mm, 0.5mm pitch) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 10) | I²C logic supply input | Decouples bus voltage from analog VCC; enables 1.2V I²C operation even when VCC = 5.5V. |
| SCL (Pin 6) | I²C clock input | Open-drain input requiring external pull-up; supports standard/fast-mode I²C up to 400kHz. |
| SDA (Pin 1) | I²C bidirectional data line | Open-drain I/O with 10pF pin capacitance; requires external pull-up and supports ACK/NACK protocol. |
| A1, A0 (Pins 2, 4) | I²C slave address bits | Hardwired to VLOGIC or GND to configure one of four unique 7-bit addresses (10100xx). |
| RL (Pin 5) | DCP low terminal | Fixed end of resistor ladder; serves as reference node in voltage divider or low-side rheostat configurations. |
| RW (Pin 9) | Wiper terminal | Movable contact controlled by WR register; delivers programmable voltage or resistance between RL and RH. |
| RH (Pin 4) | DCP high terminal | Fixed end opposite RL; connects to VCC or signal source in voltage divider applications. |
| VCC (Pin 3) | Analog power supply | Powers resistor ladder and wiper switches; sets maximum DCP terminal voltage (0V to VCC). |
| GND (Pin 8) | Analog ground reference | Common return for VCC, DCP terminals, and internal logic; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Volatile Wiper Register (WR) | 7-bit register directly readable/writable via I²C; defaults to 64 (mid-scale) at power-on for predictable startup behavior. |
| Independent VLOGIC supply | 1.2V–5.5V logic rail allows seamless integration with sub-1.8V MCUs without external level shifters or voltage translators. |
| Shutdown mode | SHDN bit in Access Control Register forces RH–RL open circuit and internally shorts RW to RL via ~2kΩ - eliminates leakage paths and stabilizes output. |
| Low wiper resistance | 70Ω typical at 3.3V enables minimal signal attenuation in audio, sensor bias, and feedback loop applications. |
| High-temperature operation | Specified from −40°C to +125°C with <8 ppm/°C ratiometric tempco (T option) ensures stable performance in harsh environments. |
Applications
| Gain Adjustment in Portable Instruments | Sensor Circuit Trimming |
|---|---|
|
Use Scenario: Calibrating gain in handheld multimeters or battery-powered oscilloscope front-ends where supply headroom is limited. IC Role / Device Role / Timing Role: Digitally programmable voltage divider setting op-amp feedback ratio in real time via I²C. Use Value: Eliminates manual trimpots and rework; enables factory/software calibration with 10kΩ precision and ±0.15 LSB INL. |
Use Scenario: Compensating offset and sensitivity drift in MEMS accelerometers or RTD bridge sensors over temperature. IC Role / Device Role / Timing Role: Adjustable reference or bias resistor in Wheatstone bridge or instrumentation amplifier networks. Use Value: Achieves <175 ppm/°C end-to-end tempco and 16 nV/√Hz noise floor for high-resolution sensor signal conditioning. |
| Power Supply Margining | RF Power Amplifier Bias Compensation |
|
Use Scenario: Dynamically adjusting output voltage setpoints during production test or field firmware updates in DC-DC converters. IC Role / Device Role / Timing Role: Replacing fixed resistors in feedback dividers of voltage regulators to enable programmable VOUT. Use Value: Supports 1.7V–5.5V VCC and 1.2V–5.5V VLOGIC - compatible with low-VIN buck controllers and embedded PMICs. |
Use Scenario: Stabilizing quiescent current in GaN or LDMOS RF PAs across process/voltage/temperature variations. IC Role / Device Role / Timing Role: Programmable bias network element controlling gate voltage in Class AB amplifier stages. Use Value: Delivers 1200 kHz −3dB bandwidth at mid-tap and −65 dB digital feed-through for clean RF bias control. |
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-tap resolution; SPI interface only; 10kΩ; higher 100ppm/°C tempco. | Requires no host refresh on power-up but lacks VLOGIC independence and I²C multi-drop capability. | Choose AD5170BRMZ-10 when nonvolatility and SPI compatibility outweigh need for ultra-low-voltage I²C operation. |
| MCP4017T-103E/MS | Volatile design; 64-tap resolution; 10kΩ; single-wire UNI/O interface; 2.7–5.5V supply only; no separate VLOGIC pin. | Limited to single-device buses; no 1.2V logic support; lower resolution reduces fine-tuning granularity. | Choose MCP4017T-103E/MS for cost-sensitive, low-pin-count designs where I²C is unavailable and 64-step resolution suffices. |
Compared with AD5170BRMZ-10 and MCP4017T-103E/MS, ISL23318WFUZ-T7A uniquely combines 1.2V I²C compatibility, 128-tap resolution, and mid-scale power-on default - making it optimal for battery-powered systems requiring deterministic startup and multi-device bus scalability.
Availability
ISL23318WFUZ-T7A is available at Aetrix Electronics and suitable for gain adjustment in portable instruments, sensor circuit trimming, power supply margining, and RF power amplifier bias compensation requiring stable component supply across extended temperature and low-voltage operating conditions.
Supply support for ISL23318WFUZ-T7A 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 trusted embedded solutions, including high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The ISL23318 series belongs to Renesas' XDCP™ (eXternally Digital Controlled Potentiometer) product line, designed specifically for replacing mechanical potentiometers in precision analog control loops where digital programmability, small footprint, and wide supply flexibility are critical.
FAQ
What is the default wiper position of the ISL23318WFUZ-T7A at power-on?
The ISL23318WFUZ-T7A powers up with its volatile Wiper Register (WR) preset to 64 (0x40 hex), placing the wiper at mid-scale - i.e., approximately 5kΩ between RL and RW, and 5kΩ between RW and RH for the 10kΩ version. This ensures repeatable, known startup behavior without host initialization.
Does the ISL23318WFUZ-T7A support true 1.2V I²C communication?
Yes - the ISL23318WFUZ-T7A accepts VLOGIC down to 1.2V while maintaining full I²C functionality, including SDA/SCL input thresholds (VIH = 0.7×VLOGIC, VIL = 0.3×VLOGIC) and 400kHz timing compliance. This enables direct interface with 1.2V microcontrollers without level-shifting circuitry.
How does the shutdown mode affect the RW terminal in the ISL23318WFUZ-T7A?
In shutdown mode (SHDN bit = 0 in ACR), the ISL23318WFUZ-T7A opens the RH–RL path and internally connects RW to RL through a ~2kΩ resistor. This prevents floating outputs and provides a defined low-impedance state - critical for system safety and stability during standby.
Can the ISL23318WFUZ-T7A be used in rheostat (two-terminal) configuration?
Yes - the ISL23318WFUZ-T7A supports both three-terminal potentiometer and two-terminal rheostat modes. In rheostat mode (e.g., RW–RL with RH unconnected), it delivers monotonic resistance from near-0Ω to 10kΩ with ±0.15 MI differential nonlinearity and 3.0 MI offset at VCC = 2.7–5.5V.
What is the maximum allowable voltage on the DCP terminals of the ISL23318WFUZ-T7A?
The DCP terminals (RH, RL, RW) of the ISL23318WFUZ-T7A must remain within 0V to VCC at all times - including during power-up sequencing. Exceeding VCC risks latch-up or permanent damage. Absolute maximum rating is −0.3V to +6.0V, but functional operation is strictly bounded by VCC.
ISL23318WFUZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23318WFUZ-T7A FAQ
1.How can I place an order for ISL23318WFUZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23318WFUZ-T7A 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 ISL23318WFUZ-T7A reliable?
The price and inventory of ISL23318WFUZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23318WFUZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL23318WFUZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23318WFUZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23318WFUZ-T7A?
ISL23318WFUZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23318WFUZ-T7A 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 ISL23318WFUZ-T7A?
For technical support, including ISL23318WFUZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23318WFUZ-T7A requirements.
6.How does Aetrix verify that ISL23318WFUZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL23318WFUZ-T7A 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 ISL23318WFUZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL23318WFUZ-T7A?
All ISL23318WFUZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL23318WFUZ-T7A, 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 ISL23318WFUZ-T7A part is unused and in its original packaging.
Return procedure for ISL23318WFUZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23318WFUZ-T7A Tags
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