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Renesas ISL23318UFUZ-T7A
- Part No.:
- ISL23318UFUZ-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL23318UFUZ-T7A.pdf
- Description:
- IC DGTL POT 50KOHM 128TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,761
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Product details
Overview
ISL23318UFUZ-T7A from Renesas Electronics is a volatile, low-voltage, I²C-compatible digitally controlled potentiometer (DCP) with 128 taps, 10kΩ total resistance, and 10-lead UTQFN (2.1mm × 1.6mm) package. It operates from VCC = 1.7V–5.5V and VLOGIC = 1.2V–5.5V, features 70Ω typical wiper resistance at 3.3V, and powers up to mid-scale (64). It enables precision analog trimming in battery-powered sensor interfaces and power supply margining circuits.
For engineers reviewing the ISL23318UFUZ-T7A datasheet, ISL23318UFUZ-T7A pinout, ISL23318UFUZ-T7A application, or ISL23318UFUZ-T7A equivalent, key selection criteria include its dual-supply independence (VLOGIC/VCC), shutdown mode with internal RW–RL short, ±0.15 LSB integral nonlinearity in voltage divider mode, and compatibility with 1.2V I²C buses without level shifters.
Technical Context
The ISL23318UFUZ-T7A implements a monolithic CMOS resistor ladder with CMOS wiper switches and integrated I²C interface logic. Its volatile Wiper Register (WR) is directly readable/writable via I²C, and the device supports four slave addresses via A0/A1 pins. The "make-before-break" switching ensures glitch-free wiper transitions during tap changes.
It features independent analog (VCC) and logic (VLOGIC) supplies, enabling direct interfacing with sub-1.8V microcontrollers while maintaining full analog performance up to 5.5V. Shutdown mode forces RH–RL open-circuit and internally shorts RW to RL through ~2kΩ, reducing total current to <2.8µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines full-scale adjustment range for gain/offset trimming in sensor signal chains and DC-DC feedback loops. |
| Wiper Resistance | 70Ω typical at VCC = 3.3V - limits insertion error and thermal noise in precision voltage divider configurations. |
| Integral Nonlinearity | ±0.15 LSB - ensures monotonic, high-fidelity analog output across all 128 taps in voltage divider mode. |
| Supply Range | VCC = 1.7V–5.5V; VLOGIC = 1.2V–5.5V - allows mixed-voltage system integration without external level shifters. |
| Shutdown Current | <2.8µA max - enables ultra-low-power sleep states in portable instrumentation and IoT edge nodes. |
| Temperature Range | −40°C to +125°C - supports operation in automotive under-hood, industrial motor control, and harsh-environment sensor modules. |
| Package | 10-lead UTQFN (2.1mm × 1.6mm, 0.5mm pitch) - provides compact footprint for space-constrained PCB layouts. |
Pinout & Package
ISL23318UFUZ-T7A uses a 10-lead UTQFN package (2.1mm × 1.6mm, 0.5mm pitch, RoHS-compliant, NiPdAu e4 termination). Pin numbering follows top-view orientation per datasheet Figure 1 (UTQFN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RL | DCP low terminal | Fixed end of resistor ladder; referenced to GND in standard voltage divider configuration. |
| A1 | I²C slave address bit 1 | Hardwired input setting MSB of 7-bit I²C address; connects to VLOGIC or GND for device addressing. |
| VCC | Analog power supply | Supplies core DCP array and analog circuitry; must be ≥1.7V and ≤5.5V for valid operation. |
| RH | DCP high terminal | Fixed end of resistor ladder; connected to VCC or reference voltage in voltage divider mode. |
| GND | Ground reference | Common return path for analog and digital sections; must be low-impedance for noise-sensitive applications. |
| SCL | I²C serial clock input | Open-drain input requiring external pull-up; defines timing for all I²C read/write transactions. |
| A0 | I²C slave address bit 0 | Hardwired input setting LSB of 7-bit I²C address; enables up to four devices on same bus. |
| SDA | I²C bidirectional data line | Open-drain input/output requiring external pull-up; carries address, register, and data bytes. |
| RW | DCP wiper terminal | Movable contact point; output voltage scales linearly with WR register value between RL and RH. |
| VLOGIC | I²C logic supply | Independent supply for I²C interface; supports 1.2V–5.5V logic levels, decoupled from VCC. |
Key Features
| Feature | Design Value |
|---|---|
| 128-tap resolution | Enables fine-grained analog tuning with 0.78% step resolution (1/127) for high-accuracy calibration. |
| VLOGIC-independent I²C | Eliminates need for external level shifters when interfacing with 1.2V–1.8V microcontrollers or FPGAs. |
| Power-on mid-scale preset | Guarantees safe default wiper position (64) at startup, preventing undefined output transients in closed-loop systems. |
| Shutdown mode with RW–RL short | Provides fail-safe behavior by grounding wiper during sleep, avoiding floating outputs and reducing leakage paths. |
| Low 16nV/√Hz noise (10kΩ) | Minimizes contribution to system noise floor in precision instrumentation amplifier gain-setting networks. |
Applications
| Gain Adjustment in Battery-Powered Instruments | Trimming Sensor Circuits |
|---|---|
Use Scenario: Calibrating gain of op-amp-based front-end amplifiers in handheld multimeters or portable gas sensors. IC Role / Device Role / Timing Role: Digitally programmable two-terminal rheostat replacing mechanical trimpots for factory and field calibration. Use Value: Enables remote firmware-controlled calibration via I²C, eliminating manual potentiometer adjustments and supporting automated test systems. | Use Scenario: Compensating offset and sensitivity drift in bridge-based pressure or temperature transducers. IC Role / Device Role / Timing Role: Three-terminal voltage divider adjusting reference voltage or feedback ratio in Wheatstone bridge signal conditioning. Use Value: Achieves ±0.15 LSB linearity over −40°C to +125°C, ensuring stable sensor accuracy without recalibration across temperature extremes. |
| Power Supply Margining | RF Power Amplifier Bias Compensation |
Use Scenario: Dynamically adjusting output voltage setpoint of DC-DC converters during production testing or system diagnostics. IC Role / Device Role / Timing Role: Precision voltage divider feeding into error amplifier reference input of PMIC or controller IC. Use Value: Supports 1.7V–5.5V VCC operation and 1.2V I²C, allowing integration into low-voltage PMIC evaluation boards without auxiliary supplies. | Use Scenario: Fine-tuning gate bias voltage of GaN or LDMOS RF power amplifiers to maintain optimal efficiency and linearity. IC Role / Device Role / Timing Role: Low-noise, low-temperature-coefficient (70 ppm/°C) rheostat in bias network controlling quiescent current. Use Value: Delivers 120kHz −3dB bandwidth and 70Ω wiper resistance, minimizing RF feed-through and preserving amplifier stability. |
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; 10kΩ; 10-lead MSOP | Retains wiper setting after power loss; requires SPI host instead of I²C | Choose AD5170BRMZ-10 when persistent settings are required and SPI is available. |
| MCP4018T-E/OT | Volatile; 64 taps; I²C interface; 10kΩ; SOT-23-6; no VLOGIC pin | Lacks independent logic supply; limited to VDD ≥2.7V; smaller package but lower resolution | Choose MCP4018T-E/OT only for cost-sensitive, low-pin-count designs where 64-tap resolution suffices. |
Compared with AD5170BRMZ-10 and MCP4018T-E/OT, the ISL23318UFUZ-T7A uniquely supports 1.2V I²C operation without level shifters and delivers superior linearity (±0.15 LSB vs ±0.5 LSB) and lower wiper resistance (70Ω vs 120Ω), making it optimal for precision, low-voltage embedded trimming.
Availability
ISL23318UFUZ-T7A is available at Aetrix Electronics and suitable for battery-powered instrumentation, sensor signal conditioning, power supply margining, and RF bias networks requiring stable component supply across extended temperature ranges.
Supply support for ISL23318UFUZ-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 high-performance, reliable solutions for automotive, industrial, infrastructure, and IoT applications.
The ISL23318 series is designed specifically for precision analog trimming in resource-constrained, low-power systems-emphasizing dual-supply flexibility, wide temperature operation, and robust I²C interoperability.
FAQ
What is the default wiper position of the ISL23318UFUZ-T7A at power-up?
The ISL23318UFUZ-T7A powers up with its volatile Wiper Register (WR) preset to 64 (0x40 hex), placing the wiper at mid-scale between RL and RH. This behavior is guaranteed across the full −40°C to +125°C operating range and ensures predictable startup in closed-loop systems without external initialization.
Does the ISL23318UFUZ-T7A require an external level shifter for 1.2V I²C communication?
No, the ISL23318UFUZ-T7A does not require an external level shifter for 1.2V I²C communication. Its dedicated VLOGIC pin accepts 1.2V–5.5V logic supplies independently of VCC, enabling direct connection to 1.2V microcontrollers while maintaining full I²C functionality and timing compliance.
What happens to the wiper position during shutdown mode of the ISL23318UFUZ-T7A?
In shutdown mode (SHDN bit = 0 in Access Control Register), the ISL23318UFUZ-T7A opens the RH–RL path and internally shorts RW to RL through a ~2kΩ resistor. The WR register contents are preserved, and the wiper returns to its pre-shutdown position within 1.5µs after exiting shutdown.
Can the ISL23318UFUZ-T7A be used in rheostat mode, and what is its maximum wiper current rating?
Yes, the ISL23318UFUZ-T7A supports rheostat mode (RW–RL or RW–RH). Its absolute maximum wiper current is ±6mA for 10 seconds, with a recommended operating limit of ±3mA. Exceeding this may cause irreversible resistance drift or thermal damage to the CMOS switch array.
How many ISL23318UFUZ-T7A devices can share the same I²C bus?
Up to four ISL23318UFUZ-T7A devices can share the same I²C bus, using combinations of A0 and A1 pins tied to VLOGIC or GND to configure unique 7-bit slave addresses. Each device responds only to its assigned address, enabling scalable multi-channel trimming in compact systems.
ISL23318UFUZ-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):
- 50k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 85ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23318UFUZ-T7A FAQ
1.How can I place an order for ISL23318UFUZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23318UFUZ-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 ISL23318UFUZ-T7A reliable?
The price and inventory of ISL23318UFUZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23318UFUZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL23318UFUZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23318UFUZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23318UFUZ-T7A?
ISL23318UFUZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23318UFUZ-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 ISL23318UFUZ-T7A?
For technical support, including ISL23318UFUZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23318UFUZ-T7A requirements.
6.How does Aetrix verify that ISL23318UFUZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL23318UFUZ-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 ISL23318UFUZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL23318UFUZ-T7A?
All ISL23318UFUZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL23318UFUZ-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 ISL23318UFUZ-T7A part is unused and in its original packaging.
Return procedure for ISL23318UFUZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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