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Renesas ISL22419UFU8Z
- Part No.:
- ISL22419UFU8Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL22419UFU8Z.pdf
- Description:
- IC DGTL POT 50KOHM 128TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,829
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Product details
Overview
ISL22419UFU8Z from Renesas Electronics (formerly Intersil) is a single-channel digitally controlled potentiometer (XDCP™) with SPI interface, 128-tap resolution, non-volatile wiper position storage, and 50kΩ end-to-end resistance. It operates from 2.7V to 5.5V, features 70Ω typical wiper resistance at 3.3V, and supports automotive-grade temperature range (−40°C to +125°C). It serves as a programmable voltage divider in precision biasing and calibration circuits.
For engineers reviewing the ISL22419UFU8Z datasheet, ISL22419UFU8Z pinout, ISL22419UFU8Z application, or ISL22419UFU8Z equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply-ready availability details - all grounded in FN6311 Rev 1.00 and official package documentation.
Technical Context
The ISL22419UFU8Z implements a monolithic CMOS DCP using resistor ladder and CMOS switches with "make-before-break" switching. Its wiper position is controlled via a 7-bit volatile Wiper Register (WR), loaded at power-up from a non-volatile Initial Value Register (IVR) storing user-defined startup settings.
It uses SPI Mode 0 (CPOL = 0, CPHA = 0), with data clocked in on SCK rising edge and out on falling edge. The SHDN pin (active-low) forces open-circuit end-to-end and shorts RW to GND while preserving register access - enabling low-power system-level control without interrupting host communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| End-to-End Resistance | 50kΩ - sets full-scale voltage division ratio and load impedance in bias networks. |
| Wiper Resistance | 70Ω typical @ 3.3V - limits voltage error and thermal noise in high-gain analog paths. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct integration into 3.3V and 5V mixed-signal systems without level-shifting. |
| Shutdown Current | 5µA max @ +125°C - allows >10-year battery operation in always-on sensor calibration nodes. |
| Non-volatile Endurance | 1,000,000 write cycles - supports field firmware updates of calibration offsets over product lifetime. |
| Temperature Coefficient | ±80 ppm/°C (50kΩ option) - ensures <±0.1% resistance drift across −40°C to +125°C for stable reference scaling. |
| SPI Clock Frequency | 5 MHz - permits sub-200ns per bit timing for fast reconfiguration during dynamic system tuning. |
Pinout & Package
ISL22419UFU8Z is housed in an 8-lead MSOP (M8.118, JEDEC MO-187AA), measuring 3.0mm × 3.0mm × 1.0mm, RoHS-compliant and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCK | SPI clock input | Edge-triggered master clock synchronizing all register reads/writes; requires clean 5MHz square wave. |
| 2 SDO | SPI open-drain data output | Requires external pull-up (≤2kΩ) for reliable read-back; outputs data on SCK falling edge. |
| 3 SDI | SPI data input | Accepts 3-byte instruction sequences (ID + command + data); sampled on SCK rising edge. |
| 4 CS | Chip select (active-low) | Enables SPI interface and powers internal logic; must transition HIGH→LOW before each transaction. |
| 5 GND | Analog/digital ground reference | Common return path for VCC, RW, and digital I/O; must be low-impedance to minimize INL/DNL errors. |
| 6 SHDN | Active-low shutdown control | Asserting pulls RW to GND and opens RH–RL path; retains WR/IVR state and allows SPI access during shutdown. |
| 7 RW | Wiper terminal | Output node of voltage divider; connects internally to selected tap; source/sink ≤±3mA. |
| 8 VCC | Power supply | Supplies both analog DCP array and digital SPI logic; requires 0.1µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Non-volatile wiper storage | IVR retains power-up position for 50 years @ ≤+55°C - eliminates boot-time calibration routines. |
| Wiper-only architecture | No RH/RL pins exposed - simplifies PCB layout and prevents misconnection in voltage divider mode. |
| Low-noise wiper resistance | 70Ω typical enables <1µV/√Hz noise contribution in precision op-amp feedback networks. |
| Shutdown mode with register access | SHDN active preserves WR/IVR and allows SPI reads - supports low-power monitoring without full wake-up. |
| High reliability registers | 1M endurance cycles + 50-year data retention - qualified for automotive and industrial recalibration applications. |
Applications
| Adjustable Voltage Reference | Laser Diode Bias Control |
|---|---|
|
Use Scenario: Generating stable, software-tuned reference voltages for ADCs or comparators in automotive sensor modules. IC Role / Device Role / Timing Role: Digitally programmable voltage divider setting VREF between GND and VCC; no external resistors required. Use Value: Enables factory and field calibration via SPI without hardware changes; ±0.5 LSB DNL ensures monotonicity across 128 steps. |
Use Scenario: Fine-tuning bias current for laser diodes in fiber-optic transceivers under varying temperature conditions. IC Role / Device Role / Timing Role: Sets precise current-limit threshold in op-amp feedback loop controlling laser driver MOSFET gate voltage. Use Value: ±80 ppm/°C TCR maintains <±0.1% current accuracy from −40°C to +125°C; non-volatile IVR recalls last-safe setting after power cycle. |
| Programmable Gain Amplifier | Industrial Sensor Calibration |
|
Use Scenario: Configuring gain in instrumentation amplifiers for multi-range pressure or temperature transducers. IC Role / Device Role / Timing Role: Replaces mechanical trimpots in feedback network of op-amp-based PGA; wiper position defines Rf/Rin ratio. Use Value: 128-tap resolution provides ~0.8% gain step size; 70Ω wiper resistance minimizes gain error and thermal EMF in low-level signal paths. |
Use Scenario: Compensating offset and span drift in MEMS accelerometers or RTD interfaces across production batches. IC Role / Device Role / Timing Role: Stores calibrated zero-point and full-scale trim values in IVR; WR updated dynamically during self-test routines. Use Value: 1,000,000 NV write cycles support automated test equipment calibration; shutdown mode reduces system standby power by >99%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL22416UFU8Z | Same 8-lead MSOP package, 128 taps, SPI interface, but 10kΩ end-to-end resistance and ±50 ppm/°C TCR. | Better suited for low-impedance, high-bandwidth gain control where lower RTOTAL reduces parasitic capacitance effects. | Select ISL22416UFU8Z when circuit loading or bandwidth demands require <10kΩ total resistance. |
| MCP41HV51-503E/SN | Microchip part; 50kΩ, SPI, 256-tap resolution, but no non-volatile IVR - wiper resets to mid-scale (80h) on power-up. | Requires host MCU to reinitialize wiper post-boot; unsuitable for "set-and-forget" calibration where power loss must preserve setting. | Choose MCP41HV51-503E/SN only if higher resolution is critical and host-controlled initialization is acceptable. |
Compared with ISL22419UFU8Z, ISL22416UFU8Z offers tighter temperature coefficient but lower resistance, while MCP41HV51-503E/SN trades non-volatility for increased resolution - making ISL22419UFU8Z the optimal choice for automotive and industrial applications requiring guaranteed power-up repeatability and robust long-term calibration stability.
Availability
ISL22419UFU8Z is available at Aetrix Electronics and suitable for automotive sensor calibration, industrial instrumentation, laser diode biasing, and programmable reference generation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ISL22419UFU8Z 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 Corporation acquired Intersil in 2017 and continues to manufacture, test, and support its precision analog portfolio including XDCP™ devices.
The ISL22419UFU8Z belongs to the XDCP™ family of digitally controlled potentiometers designed specifically for replacing mechanical trimmers in harsh-environment applications demanding non-volatile memory, wide temperature operation, and SPI configurability.
FAQ
What is the default wiper position of the ISL22419UFU8Z at power-up?
At power-up, the ISL22419UFU8Z initializes the volatile Wiper Register (WR) to 40h (64 decimal), placing the wiper near the midpoint of the 50kΩ resistor ladder. After VCC exceeds the power-on recall voltage (2.0V–2.6V), the device loads the stored value from the non-volatile Initial Value Register (IVR) into WR - so the actual startup position depends on the last-written IVR value. This behavior is documented in FN6311 Rev 1.00, Page 9.
Can the ISL22419UFU8Z operate with a 3.3V supply and still meet all specifications?
Yes, the ISL22419UFU8Z is fully specified for 3.3V operation: wiper resistance is 70Ω typical at 3.3V, supply current is 0.5mA (volatile) and 2.7mA (non-volatile) at 5MHz SPI, and all timing parameters including tWRT (1.5µs) and tV (350ns) remain valid. The 2.7V–5.5V operating range explicitly covers 3.3V systems, and performance curves (e.g., Figure 2, Page 7) confirm stable ISB and ICC across this rail.
Does the ISL22419UFU8Z require external components for basic operation?
Yes - a 0.1µF ceramic decoupling capacitor is required between VCC and GND, placed as close as possible to the ISL22419UFU8Z package, per Figure 14 (Page 12). Additionally, the SDO pin requires an external pull-up resistor (≤2kΩ) to ensure proper logic-high levels during SPI read operations. No other passive components are mandatory for core voltage-divider functionality.
How does shutdown mode affect the wiper position and register accessibility in the ISL22419UFU8Z?
In shutdown mode (SHDN = LOW or ACR[6] = 0), the ISL22419UFU8Z opens the RH–RL path and shorts RW to GND, but retains all register contents (WR, IVR, ACR). The SPI interface remains fully accessible - reads and writes to registers continue normally. Upon exit from shutdown, the wiper returns immediately to its pre-shutdown position. This behavior is defined in the Pin Description (Page 9) and Shutdown Mode section (Page 10).
Is the ISL22419UFU8Z pin-compatible with other members of the ISL224xx family?
Yes - all ISL224xx devices (e.g., ISL22416, ISL22417, ISL22419) share identical 8-lead MSOP packaging (M8.118), pinout, and SPI protocol. The only differences are end-to-end resistance (10kΩ vs. 50kΩ) and temperature coefficient (±50 ppm/°C vs. ±80 ppm/°C). This allows direct substitution in layouts where resistance value and TCR are verified compatible with the target application.
ISL22419UFU8Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 128
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±80ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22419UFU8Z FAQ
1.How can I place an order for ISL22419UFU8Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22419UFU8Z 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 ISL22419UFU8Z reliable?
The price and inventory of ISL22419UFU8Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22419UFU8Z is usually 5 days.
3.What payment methods are accepted for ISL22419UFU8Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22419UFU8Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22419UFU8Z?
ISL22419UFU8Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22419UFU8Z 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 ISL22419UFU8Z?
For technical support, including ISL22419UFU8Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22419UFU8Z requirements.
6.How does Aetrix verify that ISL22419UFU8Z is sourced from the original manufacturer or authorized distributors?
All ISL22419UFU8Z 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 ISL22419UFU8Z meets industry standards.
7.What is the process for return or replacement of ISL22419UFU8Z?
All ISL22419UFU8Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL22419UFU8Z, 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 ISL22419UFU8Z part is unused and in its original packaging.
Return procedure for ISL22419UFU8Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL22419UFU8Z Tags
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