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Renesas ISL23328WFVZ
- Part No.:
- ISL23328WFVZ
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL23328WFVZ.pdf
- Description:
- IC DGT POT 10KOHM 128TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
ISL23328WFVZ from Renesas Electronics (formerly Intersil) is a dual, volatile, 128-tap digitally controlled potentiometer with I²C interface, 10kΩ total resistance, 14-lead TSSOP package, and extended industrial temperature range (-40°C to +125°C), used for precision gain adjustment and sensor trimming in battery-powered instrumentation.
For engineers reviewing the ISL23328WFVZ datasheet, ISL23328WFVZ pinout, ISL23328WFVZ application, or ISL23328WFVZ equivalent, key selection considerations include its 1.2V–5.5V VLOGIC independent bus operation, 70Ω typical wiper resistance at 3.3V, 3µA standby current at 5V, shutdown mode with end-to-end open circuit, and guaranteed monotonicity in both voltage divider and rheostat modes.
Technical Context
The ISL23328WFVZ integrates two independent DCP cores on a monolithic CMOS IC, each with an 8-bit volatile wiper register (WR0/WR1) directly accessible via I²C. Wiper positioning uses make-before-break switching, and power-on defaults to mid-scale (64 decimal) for both channels.
It features separate analog (VCC: 1.7V–5.5V) and logic (VLOGIC: 1.2V–5.5V) supplies, enabling direct interfacing with low-voltage microcontrollers without level shifters. The device supports up to eight devices per I²C bus via three hardware address pins (A0–A2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total resistance | 10kΩ - defines full-scale analog range for gain control or bias setting in sensor/amp circuits |
| Taps per channel | 128 - provides 7.8mV/LSB resolution in 3.3V voltage divider mode (VCC = 3.3V) |
| Wiper resistance | 70Ω typical @ VCC = 3.3V - limits loading error when driving high-impedance nodes |
| Standby current | 3µA @ VCC/VLOGIC = 5V - enables ultra-low-power operation in sleep-mode battery systems |
| Operating temp | -40°C to +125°C - qualified for under-hood automotive, industrial motor control, and harsh-environment sensing |
| I²C compatibility | Standard/fast-mode (400kHz) - interoperable with common MCU I²C peripherals without custom timing |
| INL/DNL | ±0.15 LSB - ensures monotonic response critical for closed-loop calibration and feedback stability |
Pinout & Package
ISL23328WFVZ is housed in a 14-lead TSSOP package (M14.173), RoHS-compliant, with 0.65mm lead pitch and exposed pad not connected.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return for analog and digital sections; must be low-impedance for noise-sensitive wiper outputs |
| VLOGIC | I²C logic supply | Independent 1.2V–5.5V rail enabling direct connection to 1.8V/2.5V/3.3V MCUs-no level shifter required |
| SDA | I²C bidirectional data | Open-drain pin requiring external pull-up; shares bus with up to seven other ISL23328 devices |
| SCL | I²C clock input | Open-drain clock input synchronized to master; supports 400kHz fast-mode timing |
| A0–A2 | Slave address inputs | Hardwired to VLOGIC or GND to set unique 7-bit I²C address (0x50–0x57) |
| RL0/RW0/RH0 | DCP0 terminals | Low/wiper/high connections for first potentiometer; configured as 3-terminal pot or 2-terminal rheostat |
| RL1/RW1/RH1 | DCP1 terminals | Low/wiper/high connections for second potentiometer; independently controllable via WR1 register |
| VCC | Analog supply | 1.7V–5.5V analog rail powering resistor array; must exceed max DCP terminal voltage (0–VCC) |
Key Features
| Feature | Design Value |
|---|---|
| Dual 128-tap DCPs | Enables simultaneous gain/offset tuning of two signal paths (e.g., differential sensor front-end) |
| Volatile wiper registers | WR0/WR1 retain position during active operation but reset to 64 on power-up-ensures known startup state |
| Independent VLOGIC supply | Eliminates need for external level translation when interfacing with sub-1.8V logic domains |
| Shutdown mode | Forces RW–RL open-circuit and disconnects DCP array-reduces system leakage in standby |
| Monotonic performance | Guaranteed ±0.15 LSB INL/DNL ensures no code transitions cause output reversal in closed-loop systems |
Applications
| Power Supply Margining | RF Power Amplifier Bias |
|---|---|
Use Scenario: Adjusting reference voltage to test IC functional limits across voltage corners during production test. IC Role / Device Role / Timing Role: Digitally programmable voltage divider setting VREF for DC-DC controller feedback network. Use Value: Enables automated margining sweeps via I²C without manual trimmer replacement-reducing test time by >90%. | Use Scenario: Dynamically compensating for temperature-induced drift in GaAs FET gate bias networks. IC Role / Device Role / Timing Role: Two-terminal rheostat controlling current into amplifier bias node to maintain constant output power. Use Value: 128-step resolution allows <±0.5dB output power stability over -40°C to +125°C without analog compensation circuitry. |
| Sensor Circuit Trimming | Battery-Powered Instrument Gain |
Use Scenario: Calibrating offset and sensitivity of MEMS pressure sensors in portable medical devices. IC Role / Device Role / Timing Role: Dual potentiometer configuring both zero-adjust (DCP0) and span-adjust (DCP1) in instrumentation amplifier topology. Use Value: Eliminates mechanical trimpots prone to vibration-induced drift-improving long-term calibration retention in field-deployed units. | Use Scenario: Setting programmable gain for ECG front-end amplifiers operating from coin-cell batteries. IC Role / Device Role / Timing Role: Voltage divider scaling input signal before ADC conversion; optimized for 1.8V MCU interface. Use Value: 3µA standby current extends battery life beyond 5 years in always-on monitoring applications. |
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 | Single-channel, 256-tap, SPI interface, 10kΩ, 10-lead MSOP; no VLOGIC independence | Lacks dual-channel capability and I²C bus compatibility; requires SPI host and level-shifting for sub-1.8V logic | Select when higher tap resolution (256) is prioritized over dual-channel integration and I²C simplicity |
| MCP45HV51-103E/MS | Dual-channel, 256-tap, I²C, 10kΩ, 16-lead QFN; supports 12V tolerant DCP terminals | Higher voltage rating (12V) and finer resolution-but larger footprint and 2× higher standby current (6µA) | Select when operating DCP terminals above 5.5V or requiring <±0.1 LSB linearity in extended temp range |
Compared with AD5170BRMZ-10 and MCP45HV51-103E/MS, the ISL23328WFVZ delivers optimal balance of dual-channel integration, ultra-low standby power, and true 1.2V I²C compatibility-making it preferred for space-constrained, battery-operated systems requiring coordinated analog tuning.
Availability
ISL23328WFVZ is available at Aetrix Electronics and suitable for power supply margining, RF amplifier bias compensation, sensor trimming, and battery-powered instrument gain adjustment requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for ISL23328WFVZ 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 product support, documentation, and qualification for legacy Intersil precision analog ICs including the ISL23328 series.
The ISL23328 product line was designed specifically for replacing mechanical potentiometers in digitally calibrated systems-emphasizing low power, wide temperature operation, and seamless I²C integration in resource-constrained embedded platforms.
FAQ
What is the default wiper position of ISL23328WFVZ at power-up?
At power-up, both wiper registers (WR0 and WR1) of the ISL23328WFVZ reset to 0x40 (64 decimal), placing each wiper at the mid-scale position (64/128) between RH and RL terminals. This behavior is guaranteed across the full -40°C to +125°C temperature range and ensures a known, repeatable startup state for safety-critical calibration sequences.
Does ISL23328WFVZ support true 1.2V I²C bus operation?
Yes, ISL23328WFVZ supports true 1.2V I²C bus operation via its dedicated VLOGIC pin, which powers internal level-shifting circuitry. When VLOGIC = 1.2V, the SDA and SCL inputs accept 0.3 × VLOGIC (0.36V) low and 0.7 × VLOGIC (0.84V) high thresholds-enabling direct connection to 1.2V logic without external translators.
Can ISL23328WFVZ be used in rheostat mode?
Yes, ISL23328WFVZ operates in rheostat mode by connecting only RW and RL (or RW and RH) terminals while leaving the third terminal unconnected. In this configuration, it provides 128-step variable resistance from 0Ω to 10kΩ with guaranteed monotonicity (±0.15 LSB DNL) and 70Ω typical wiper resistance at 3.3V.
What is the maximum wiper current rating for ISL23328WFVZ?
The absolute maximum wiper current for ISL23328WFVZ is ±6mA for 10 seconds (per Absolute Maximum Ratings), but the Recommended Operating Conditions specify a continuous limit of ±3mA. Exceeding ±3mA risks increased wiper resistance drift and long-term reliability degradation, especially at elevated temperatures.
How does shutdown mode affect the wiper position in ISL23328WFVZ?
In shutdown mode (SHDN bit = 0 in ACR register), ISL23328WFVZ disconnects the DCP resistor array and internally connects RW to RL through a 2kΩ series resistor. The wiper register values (WR0/WR1) are retained, and upon exit from shutdown, the wipers return to their pre-shutdown positions after ≤1.5µs settling time-preserving calibration state across low-power cycles.
ISL23328WFVZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- 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):
- 125ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23328WFVZ FAQ
1.How can I place an order for ISL23328WFVZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23328WFVZ 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 ISL23328WFVZ reliable?
The price and inventory of ISL23328WFVZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23328WFVZ is usually 5 days.
3.What payment methods are accepted for ISL23328WFVZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23328WFVZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23328WFVZ?
ISL23328WFVZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23328WFVZ 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 ISL23328WFVZ?
For technical support, including ISL23328WFVZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23328WFVZ requirements.
6.How does Aetrix verify that ISL23328WFVZ is sourced from the original manufacturer or authorized distributors?
All ISL23328WFVZ 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 ISL23328WFVZ meets industry standards.
7.What is the process for return or replacement of ISL23328WFVZ?
All ISL23328WFVZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL23328WFVZ, 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 ISL23328WFVZ part is unused and in its original packaging.
Return procedure for ISL23328WFVZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23328WFVZ Tags
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