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Renesas ISL23328TFRUZ-TK
- Part No.:
- ISL23328TFRUZ-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 16-UFQFN
- Datasheet:
-
ISL23328TFRUZ-TK.pdf
- Description:
- IC DGTL POT 100KOHM 16UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
ISL23328TFRUZ-TK from Renesas Electronics (formerly Intersil) is a dual, volatile, 128-tap digitally controlled potentiometer with I²C interface, 100kΩ total resistance, 1.7V–5.5V analog supply (VCC), and independent 1.2V–5.5V logic supply (VLOGIC). It operates across –40°C to +125°C and is used for precision gain/offset trimming in battery-powered instrumentation and power supply margining.
For engineers reviewing the ISL23328TFRUZ-TK datasheet, ISL23328TFRUZ-TK pinout, ISL23328TFRUZ-TK application, or ISL23328TFRUZ-TK equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-DCP operation mode, real-world use cases in sensor trimming and RF bias control, and two technically documented alternative parts with explicit functional and application-level distinctions.
Technical Context
The ISL23328TFRUZ-TK integrates two independent DCP cores on a single monolithic CMOS die, each with an 8-bit volatile wiper register (WR0/WR1) directly accessible via I²C. Wiper positioning uses make-before-break switching, ensuring monotonic resistance transitions and glitch-free voltage divider output during tap changes.
Its dual-supply architecture separates analog (VCC) and digital (VLOGIC) domains: VLOGIC enables direct interfacing with 1.2V microcontrollers without level shifters, while VCC powers the resistor array and supports up to 5.5V DCP terminal voltages. Shutdown mode forces end-to-end open circuit and internally connects RW to RL via a 2kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ - defines full-scale adjustment range for voltage divider or rheostat configurations |
| Taps per Potentiometer | 128 - provides 7.8mV/LSB resolution at 1V span, enabling fine-grained analog tuning |
| VCC Supply Range | 1.7V to 5.5V - supports operation from single Li-ion cells up to standard 5V rails |
| VLOGIC Supply Range | 1.2V to 5.5V - allows direct connection to ultra-low-voltage MCUs without external level translation |
| Wiper Resistance | 70Ω typical @ 3.3V - minimizes loading error in high-impedance feedback paths |
| Standby Current | 3µA @ 5V, 1.7µA @ 1.7V - enables multi-year battery life in always-on sensor nodes |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and base station equipment |
Pinout & Package
ISL23328TFRUZ-TK is packaged in a 16-lead UTQFN (2.6mm × 1.8mm, 0.5mm pitch, exposed pad), RoHS-compliant and moisture-sensitive level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for analog and digital sections; must be low-impedance to minimize noise coupling |
| VLOGIC | Digital supply input | Powers I²C interface and internal logic; sets input thresholds and enables 1.2V bus compatibility |
| SDA | I²C bidirectional data | Open-drain pin requiring external pull-up; transmits wiper register reads/writes and ACK/NACK |
| SCL | I²C clock input | Open-drain clock input synchronized to master; controls timing of all register access operations |
| A0–A2 | Slave address inputs | Hardwired LSBs of 7-bit I²C address; allow up to eight devices on same bus without address conflict |
| RH0, RL0, RW0 | DCP0 high/low/wiper terminals | Form three-terminal potentiometer or two-terminal rheostat; RH0/RL0 define 100kΩ end-to-end resistance |
| RH1, RL1, RW1 | DCP1 high/low/wiper terminals | Independent second DCP channel; matched to DCP0 within ±2 LSB for ratiometric applications |
| VCC | Analog supply input | Powers resistor array and wiper switches; sets maximum allowable voltage across DCP terminals |
Key Features
| Feature | Design Value |
|---|---|
| Dual 128-tap DCPs | Enables simultaneous gain and offset calibration in single-supply op-amp circuits without inter-channel crosstalk |
| Volatile wiper registers (WR0/WR1) | Allows dynamic runtime reconfiguration via I²C; power-on defaults to mid-scale (64) for safe startup |
| Independent VLOGIC supply | Eliminates need for external level shifters when interfacing with 1.2V/1.8V microcontrollers or FPGAs |
| Shutdown mode (SHDN bit) | Reduces system power by disconnecting DCP resistors and forcing RW–RL path, preventing leakage into sensitive nodes |
| ±0.15 LSB DNL / ±0.15 LSB INL | Ensures monotonicity and linearity critical for closed-loop control systems where non-monotonic behavior causes instability |
Applications
| Power Supply Margining | Sensor Circuit Trimming |
|---|---|
Use Scenario: Adjusting reference voltage thresholds in DC-DC converter feedback loops to verify tolerance margins under load and temperature variation. IC Role / Device Role / Timing Role: Dual DCP acts as programmable voltage divider for VREF and compensation network tuning. Use Value: Enables automated production test sequencing without manual potentiometer adjustment; 100kΩ resistance minimizes current draw from error amplifier inputs. |
Use Scenario: Calibrating offset and gain errors in bridge-based pressure or temperature sensors before signal conditioning. IC Role / Device Role / Timing Role: ISL23328TFRUZ-TK provides matched, temperature-stable resistance elements for both zero and span adjustments. Use Value: Dual-channel matching (±2 LSB) ensures correlated drift between gain and offset paths, preserving calibration accuracy over –40°C to +125°C. |
| RF Power Amplifier Bias | Battery-Powered Instrument Gain Control |
Use Scenario: Dynamically adjusting gate bias voltage of GaN or LDMOS PAs to maintain optimal efficiency across operating bands and temperatures. IC Role / Device Role / Timing Role: ISL23328TFRUZ-TK functions as a low-noise, low-feedthrough rheostat in bias current setting networks. Use Value: –65dB digital feed-through and 61nV/√Hz resistor noise prevent modulation artifacts and SNR degradation in transmit chains. |
Use Scenario: Setting programmable gain in portable multimeters or handheld oscilloscopes where battery life and calibration stability are critical. IC Role / Device Role / Timing Role: Dual DCP configures both input attenuation and amplifier feedback ratio in a single-chip solution. Use Value: 1.7µA standby current at 1.7V extends shelf life of sealed instruments; 128-tap resolution supports 0.1% gain step accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ100 | Single 100kΩ DCP, I²C interface, 2.7V–5.5V VDD only (no separate VLOGIC), 200ppm/°C tempco | Lacks dual-channel capability and 1.2V logic compatibility; higher tempco reduces stability in wide-temperature sensor calibrations | Select when only one DCP is needed and host MCU operates at ≥2.7V logic levels |
| MCP45HV51-103E/ST | Dual 10kΩ DCP, SPI interface, 4.5V–22V high-voltage operation, no VLOGIC pin | Requires SPI host and level-shifting for low-voltage MCUs; 10kΩ value increases current draw in high-impedance bias networks | Select for high-voltage bias control (e.g., laser diode drivers) where SPI is preferred and >5.5V operation is required |
Compared with AD5242BRUZ100 and MCP45HV51-103E/ST, the ISL23328TFRUZ-TK uniquely combines dual 100kΩ channels, 1.2V–5.5V VLOGIC flexibility, and ±2 LSB channel matching-making it the only option for compact, low-power, ratiometric trimming in battery-operated industrial sensors and RF subsystems.
Availability
ISL23328TFRUZ-TK is available at Aetrix Electronics and suitable for power supply margining, sensor circuit trimming, RF power amplifier bias compensation, and battery-powered instrument gain control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL23328TFRUZ-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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL23328 family of digitally controlled potentiometers.
The ISL23328 product line was designed specifically for precision analog trimming in space-constrained, low-power, and wide-temperature applications-emphasizing dual-channel integration, independent logic/analog supplies, and robust I²C interoperability.
FAQ
What is the default wiper position of ISL23328TFRUZ-TK at power-on?
At power-on, both wiper registers (WR0 and WR1) of the ISL23328TFRUZ-TK reset to 64 (0x40 hexadecimal), placing each wiper at the mid-scale position (64th tap) of its respective 128-tap resistor string. This ensures predictable, centered operation for voltage dividers and rheostats during system initialization without requiring host firmware intervention.
Does ISL23328TFRUZ-TK support true 1.2V I²C bus operation?
Yes, ISL23328TFRUZ-TK fully supports 1.2V I²C bus operation via its dedicated VLOGIC pin, which sets input thresholds and powers the digital interface independently of VCC. The datasheet specifies VIH = 0.7 × VLOGIC and VIL = 0.3 × VLOGIC, confirming reliable recognition of 1.2V logic highs and lows without external level shifting.
Can ISL23328TFRUZ-TK be used in rheostat mode?
Yes, ISL23328TFRUZ-TK supports rheostat configuration by connecting either RH or RL to the wiper (RW) and using the remaining terminal as the variable resistance node. In this mode, the device delivers monotonic resistance from 0Ω to 100kΩ with ±0.15 MI differential non-linearity, validated across VCC = 1.7V–5.5V and –40°C to +125°C.
What is the maximum wiper current rating for ISL23328TFRUZ-TK?
The absolute maximum wiper current for ISL23328TFRUZ-TK is ±6mA for short durations (≤10 seconds), but the recommended operating limit is ±3mA. Exceeding ±3mA risks increased wiper resistance drift and accelerated wear; design should ensure worst-case current through RW remains within this bound under all VCC and tap-position conditions.
How does shutdown mode affect the wiper position in ISL23328TFRUZ-TK?
In shutdown mode (SHDN bit = 0 in ACR register), ISL23328TFRUZ-TK disconnects the DCP resistor array from both RH and RL terminals and internally connects RW to RL via a 2kΩ series resistor. The wiper register values (WR0/WR1) remain unchanged, and upon exit from shutdown, the wipers return to their pre-shutdown positions after a 1.5µs recall time.
ISL23328TFRUZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 16-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 128
- Resistance (Ohms):
- 100k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-UTQFN (2.6x1.8)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23328TFRUZ-TK FAQ
1.How can I place an order for ISL23328TFRUZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23328TFRUZ-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 ISL23328TFRUZ-TK reliable?
The price and inventory of ISL23328TFRUZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23328TFRUZ-TK is usually 5 days.
3.What payment methods are accepted for ISL23328TFRUZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23328TFRUZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23328TFRUZ-TK?
ISL23328TFRUZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23328TFRUZ-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 ISL23328TFRUZ-TK?
For technical support, including ISL23328TFRUZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23328TFRUZ-TK requirements.
6.How does Aetrix verify that ISL23328TFRUZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL23328TFRUZ-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 ISL23328TFRUZ-TK meets industry standards.
7.What is the process for return or replacement of ISL23328TFRUZ-TK?
All ISL23328TFRUZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL23328TFRUZ-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 ISL23328TFRUZ-TK part is unused and in its original packaging.
Return procedure for ISL23328TFRUZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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