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Renesas ISL21090BFB825Z-TK
- Part No.:
- ISL21090BFB825Z-TK
- Manufacturer:
- Renesas
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL21090BFB825Z-TK.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,054
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Product details
Overview
ISL21090BFB825Z-TK from Intersil is a precision 2.5V voltage reference IC with ultra-low 1.9µVP-P (0.1Hz–10Hz) noise, ±0.02% initial accuracy, and 7ppm/°C temperature coefficient in an 8-lead SOIC package. It delivers 20mA output current, supports 3.7V to 36V input range, and operates from –40°C to +125°C - ideal for high-resolution ADC/DAC biasing in portable instrumentation.
For engineers reviewing the ISL21090BFB825Z-TK datasheet, ISL21090BFB825Z-TK pinout, ISL21090BFB825Z-TK application, or ISL21090BFB825Z-TK equivalent, key selection criteria include low-frequency noise performance, tight DC accuracy over industrial temperature range, load regulation of 2.5ppm/mA, and compatibility with 0.1µF output capacitance for fast settling.
Technical Context
The ISL21090BFB825Z-TK employs an advanced bipolar bandgap architecture with factory laser trimming to achieve sub-0.02% initial accuracy and stable 7ppm/°C drift across –40°C to +125°C. Its COMP pin (Pin 3) requires a 0.01µF capacitor for noise reduction and stability, while VOUT (Pin 6) drives up to 20mA with <150µs turn-on time.
It features internal 5kΩ trim resistor and feedback network enabling ±6.3mV output adjustment via external potentiometer; dropout voltage is 1.1V at 10mA load. Ripple rejection exceeds 90dB at 120Hz, supporting operation in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal - precisely calibrated reference for 12–16-bit data converters |
| Initial Accuracy | ±0.02% at +25°C - enables single-point calibration in high-end meters |
| Tempco | 7ppm/°C max - ensures ≤±116ppm (≈±290µV) drift over full –40°C to +125°C range |
| 0.1–10Hz Noise | 1.9µVP-P - critical for resolving sub-µV signals in precision weigh scales |
| Supply Current | 0.93mA typ - supports battery-powered handheld instruments with >100hr runtime |
| Line Regulation | 8ppm/V - maintains stability under ±10% input rail variation in industrial PLCs |
| Load Regulation | 2.5ppm/mA - holds accuracy across 0–20mA sensor excitation loads |
Pinout & Package
Package: 8-lead SOIC (M8.15E), RoHS-compliant, Pb-free matte tin finish, MSL Level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | DNC | Do Not Connect - floating pins; no internal connection or function |
| 2 | VIN | Input voltage supply - accepts 3.7V to 36V; must be ≥1.1V above VOUT for regulation |
| 3 | COMP | Noise reduction & compensation - requires 0.01µF capacitor to ground for stability |
| 4 | GND | Analog ground reference - star-point connection required for low-noise layout |
| 5 | TRIM | Output voltage adjustment node - connects to internal 5kΩ resistor; enables ±6.3mV fine-tuning |
| 6 | VOUT | Precision 2.5V reference output - drives up to 20mA; minimum 0.1µF output capacitor recommended |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 0.1–10Hz noise | 1.9µVP-P - preserves SNR in 24-bit delta-sigma ADC front-ends |
| High DC accuracy | ±0.02% initial tolerance - eliminates need for system-level calibration in medical sensors |
| Wide input range | 3.7V to 36V - supports direct connection to unregulated 12V/24V industrial rails |
| Fast turn-on | 150µs settling - synchronizes with microcontroller wake-up for low-power data acquisition |
| Trimmable output | ±6.3mV adjustment via TRIM pin - corrects board-level errors without redesign |
Applications
| Portable Digital Multimeter | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Handheld DMM requiring 6½-digit resolution and battery life >100 hours. IC Role / Device Role / Timing Role: Primary 2.5V reference for dual-slope and sigma-delta ADCs; supplies excitation for ohms measurement circuitry. Use Value: 1.9µVP-P noise and ±0.02% accuracy enable true 20ppm measurement repeatability without auto-zero cycles. | Use Scenario: DIN-rail mounted PLC with 16-channel 16-bit analog inputs operating in 0–60°C ambient. IC Role / Device Role / Timing Role: Per-channel reference for simultaneous-sampling SAR ADCs; shares common VREF bus with local decoupling. Use Value: 7ppm/°C tempco and 2.5ppm/mA load regulation ensure channel-to-channel matching <0.01% across temperature and load variations. |
| Medical Patient Monitor ECG Front-End | Automated Test Equipment (ATE) Source Measure Unit |
Use Scenario: Low-power wearable ECG device measuring microvolt-level biopotentials with 120dB CMRR. IC Role / Device Role / Timing Role: Reference for programmable-gain instrumentation amplifier and 24-bit ADC; powers right-leg drive circuitry. Use Value: Ultra-low 1.9µVP-P noise prevents reference-induced baseline wander in sub-Hz bandwidth signals. | Use Scenario: Rack-mounted ATE SMU requiring ±0.01% absolute voltage sourcing accuracy from 0–10V range. IC Role / Device Role / Timing Role: Precision 2.5V reference for DAC-based voltage programming loop; feeds Kelvin-sense comparator. Use Value: ±0.02% initial accuracy and 20ppm long-term stability reduce annual recalibration frequency by 3× vs. standard references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ | 2.5V, ±0.02% initial accuracy, 3ppm/°C tempco, 1.0µVP-P noise, 10mA output, SOIC-8 | Lower tempco and noise but reduced output drive; requires external buffer for >10mA loads | Preferred when ultimate stability (<3ppm/°C) and lowest noise are prioritized over drive capability |
| REF5025AIDR | 2.5V, ±0.05% initial accuracy, 3ppm/°C tempco, 1.2µVP-P noise, 10mA output, SOIC-8 | Higher initial error but superior long-term drift (12ppm/√khr); optimized for metrology-grade systems | Chosen for calibration standards and lab equipment where aging behavior dominates over initial tolerance |
Compared with ADR4525BRZ and REF5025AIDR, the ISL21090BFB825Z-TK provides higher output current (20mA vs. 10mA), wider input range (3.7–36V vs. 3–18V), and integrated trim capability - making it optimal for embedded industrial sensors and portable test gear where drive strength and field-adjustability matter.
Availability
ISL21090BFB825Z-TK is available at Aetrix Electronics and suitable for high-end instrumentation, industrial PLC analog modules, and portable medical devices requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ISL21090BFB825Z-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
Intersil Corporation designs high-performance analog, mixed-signal, and power management semiconductors for industrial, infrastructure, and high-end consumer markets.
The ISL21090 product line delivers ultra-low-noise, high-accuracy voltage references optimized for precision data acquisition, portable instrumentation, and industrial control systems demanding DC stability and low-frequency noise immunity.
FAQ
What is the maximum input voltage rating for the ISL21090BFB825Z-TK?
The ISL21090BFB825Z-TK has an absolute maximum VIN-to-GND rating of +40V. However, its specified operating input range is 3.7V to 36V for the 2.5V output version. Exceeding 36V may cause excessive power dissipation or thermal stress, especially at high ambient temperatures. Always maintain VIN ≥ (VOUT + dropout), where dropout is 1.1V min at 10mA load.
Does the ISL21090BFB825Z-TK require an external capacitor on the COMP pin?
Yes, the ISL21090BFB825Z-TK requires a 0.01µF capacitor connected between COMP (Pin 3) and GND for stability and optimal noise performance. This capacitor reduces high-frequency noise and prevents oscillation in the internal compensation network. Omitting it may result in increased output noise or instability under dynamic load conditions.
Can the ISL21090BFB825Z-TK drive a 1µF output capacitor?
Yes, the ISL21090BFB825Z-TK can safely drive up to 10µF output capacitance. The datasheet confirms stable operation with 1µF, and typical turn-on time remains ≤150µs. Larger capacitors improve PSRR and reduce broadband noise but do not significantly lower 0.1–10Hz noise beyond marginal gains - 0.1µF is the minimum recommended for basic stability.
What is the purpose of the TRIM pin on the ISL21090BFB825Z-TK?
The TRIM pin (Pin 5) on the ISL21090BFB825Z-TK provides access to the internal feedback node of the output amplifier, enabling ±6.3mV output adjustment using an external potentiometer and 1MΩ series resistor. This allows correction of system-level errors such as PCB trace resistance or DAC offset without modifying hardware layout or firmware calibration tables.
How does the ISL21090BFB825Z-TK perform under load current variation?
The ISL21090BFB825Z-TK exhibits 2.5ppm/mA load regulation for sourcing currents from 0–20mA and identical 2.5ppm/mA for sinking currents from –10–0mA. This translates to only ±50ppm (±125µV) output shift across full 20mA load swing - critical for maintaining accuracy in sensor excitation circuits and programmable current sources.
ISL21090BFB825Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 7ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.9µVp-p
- Noise - 10Hz to 10kHz:
- 1.6µVrms
- Voltage - Input:
- 3.7V ~ 36V
- Current - Supply:
- 1.28mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL21090BFB825Z-TK FAQ
1.How can I place an order for ISL21090BFB825Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL21090BFB825Z-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 ISL21090BFB825Z-TK reliable?
The price and inventory of ISL21090BFB825Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL21090BFB825Z-TK is usually 5 days.
3.What payment methods are accepted for ISL21090BFB825Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL21090BFB825Z-TK transactions.
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4.How is shipping managed for ISL21090BFB825Z-TK?
ISL21090BFB825Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL21090BFB825Z-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 ISL21090BFB825Z-TK?
For technical support, including ISL21090BFB825Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL21090BFB825Z-TK requirements.
6.How does Aetrix verify that ISL21090BFB825Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL21090BFB825Z-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 ISL21090BFB825Z-TK meets industry standards.
7.What is the process for return or replacement of ISL21090BFB825Z-TK?
All ISL21090BFB825Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL21090BFB825Z-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 ISL21090BFB825Z-TK part is unused and in its original packaging.
Return procedure for ISL21090BFB825Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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