My Inquiry
My Account
Renesas ISL21009CFB825Z-TK
- Part No.:
- ISL21009CFB825Z-TK
- Manufacturer:
- Renesas
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL21009CFB825Z-TK.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL21009CFB825Z-TK from Intersil is a high-voltage-input, precision, low-noise voltage reference IC delivering a stable 2.500V output with ±1.0mV initial accuracy, 5ppm/°C temperature coefficient, and 4.5µVP-P (0.1Hz–10Hz) output noise. It operates from 3.5V to 16.5V input, draws ≤180µA supply current, and supports ±7.0mA output current - enabling high-resolution data acquisition in battery-powered instrumentation and industrial sensor interfaces.
For engineers reviewing the ISL21009CFB825Z-TK datasheet, ISL21009CFB825Z-TK pinout, ISL21009CFB825Z-TK application, or ISL21009CFB825Z-TK equivalent, key selection criteria include its FGA™ floating-gate analog technology for ultra-low drift, SOIC-8 package compatibility with space-constrained PCB layouts, and guaranteed performance across –40°C to +125°C for automotive and industrial environments.
Technical Context
The ISL21009CFB825Z-TK uses Intersil's proprietary Floating Gate Analog (FGA™) process to achieve precise charge-trapped reference voltage generation, eliminating reliance on bandgap or zener mechanisms. Its buffered output stage provides low impedance drive while maintaining sub-100µV load regulation over ±7mA sourcing/sinking.
Thermal hysteresis is limited to 50ppm after cycling from –40°C to +125°C, and long-term stability is rated at 50ppm over time. Line regulation is 10–50µV/V across its full 3.5V–16.5V input range, supporting operation directly from unregulated supplies such as battery stacks or industrial rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1.0mV at +25°C - enables direct interface with 2.5V ADC/DAC full-scale ranges without calibration. |
| Tempco | 5ppm/°C - ensures ≤±0.21mV total drift over –40°C to +125°C, critical for precision metrology. |
| Noise (0.1–10Hz) | 4.5µVP-P - minimizes quantization uncertainty in 16-bit+ SAR and sigma-delta converters. |
| Supply Current | ≤180µA - supports multi-year battery life in portable meters and wireless sensors. |
| Input Range | 3.5V to 16.5V - allows direct connection to 4-cell Li-ion packs (up to 16.8V) or 12V industrial buses. |
| Output Drive | ±7.0mA - sufficient to drive ADC reference inputs, op-amp bias networks, and small DAC loads. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and factory-floor industrial use. |
Pinout & Package
Package: 8-lead SOIC (M8.15), Pb-free, RoHS-compliant, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND or NC | Ground connection or no-connect - tie to system ground for lowest noise; leave floating only if unused per layout constraints. |
| 2 | VIN | Main power input - decouple with ≥0.1µF ceramic capacitor close to pin to suppress supply ripple. |
| 4 | GND | Dedicated ground return - connect to low-impedance ground plane to minimize ground bounce during load transients. |
| 5 | TRIM or NC | Adjustment input - connect external potentiometer (2.5% trim range) only when fine-tuning required; otherwise leave open. |
| 6 | VOUT | Stable 2.500V reference output - route with short, guarded trace to ADC REF pin to avoid noise pickup. |
| 3, 7, 8 | DNC | Do Not Connect - internal die connections; must remain electrically floating to prevent parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| FGA™ Floating-Gate Technology | Enables <0.5mV initial error variants and eliminates zener/bandgap-related aging and thermal hysteresis. |
| Ultra-Low 0.1–10Hz Noise | 4.5µVP-P - preserves ENOB in high-resolution data converters without external filtering. |
| Wide Input Voltage Range | 3.5V–16.5V - eliminates need for pre-regulation in systems powered by variable sources like solar chargers or battery banks. |
| Trimmable Output | ±2.5% adjustment via high-impedance TRIM pin - supports field calibration without redesigning reference circuitry. |
| High Temp Operating Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for automotive sensor modules and motor control feedback paths. |
Applications
| High-Resolution Data Acquisition | Digital Panel Meters |
|---|---|
Use Scenario: 16-bit SAR ADC in portable environmental monitor measuring thermocouple or RTD signals. IC Role / Device Role / Timing Role: Precision 2.500V reference source for ADC full-scale calibration and ratiometric scaling. Use Value: 4.5µVP-P noise and 5ppm/°C tempco ensure <0.005% measurement accuracy over temperature without software correction. | Use Scenario: 4½-digit handheld multimeter with auto-ranging and battery operation. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope integrator and display driver reference. Use Value: 180µA max supply current extends battery life beyond 200 hours; ±1.0mV accuracy eliminates factory recalibration. |
| Industrial Sensor Signal Conditioning | Battery Management Systems |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Stable excitation reference for bridge sensor and ADC reference in isolated analog front-end. Use Value: 3.5V–16.5V input range accommodates wide loop voltage drop; 50ppm thermal hysteresis prevents offset drift after thermal cycling. | Use Scenario: Cell voltage monitoring IC in 4S Li-ion pack for e-bike or UPS. IC Role / Device Role / Timing Role: Reference for 12-bit ADC measuring individual cell voltages with ±1mV absolute accuracy. Use Value: Guaranteed ±1.0mV initial error at +25°C and 5ppm/°C drift enable <10mV total error across operating temperature - meeting JEITA BMS spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | 2.5V, ±0.25mV initial accuracy, 3ppm/°C, 100µA supply, SOIC-8 | Lower drift and tighter accuracy but higher cost; requires ≥4.5V input | Select for metrology-grade systems where 3ppm/°C and 0.25mV error justify premium pricing and input voltage margin. |
| ADR441BRZ | 2.5V, ±0.12mV initial accuracy, 3ppm/°C, 1.2mA supply, SOIC-8 | Higher power, superior noise (1.8µVP-P), wider temp range (–40°C to +125°C) | Choose when ultra-low noise dominates design priority and board-level power budget permits >1mA quiescent draw. |
Compared with REF5025IDR and ADR441BRZ, the ISL21009CFB825Z-TK delivers best-in-class micropower operation (≤180µA) and wide-input flexibility (3.5V–16.5V) at moderate accuracy - making it optimal for cost-sensitive, battery-operated industrial instruments where 5ppm/°C drift is acceptable.
Availability
ISL21009CFB825Z-TK is available at Aetrix Electronics and suitable for high-resolution data acquisition, digital panel meters, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL21009CFB825Z-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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for industrial, aerospace, and communications markets, with emphasis on precision, reliability, and low-power innovation.
The ISL21009 family was developed to deliver ultra-stable, low-drift voltage references using FGA™ floating-gate technology - targeting applications demanding high accuracy without external trimming or complex compensation circuits.
FAQ
What is the maximum input voltage rating for the ISL21009CFB825Z-TK?
The absolute maximum voltage from VIN to GND is +18V, with recommended operating input range specified as 3.5V to 16.5V. Exceeding 18V risks permanent damage. The ISL21009CFB825Z-TK maintains full parameter guarantees across its 3.5V–16.5V operating range, including line regulation and output stability - making it suitable for direct connection to 12V automotive or industrial bus systems.
Can the ISL21009CFB825Z-TK drive a 10µF output capacitor directly?
No - the ISL21009CFB825Z-TK output stage is not optimized for heavy capacitive loads. Capacitors >0.001µF may cause instability or excessive overshoot. For 10µF bulk capacitance, use the RC noise-reduction network shown in Figure 58: 2kΩ series resistor + 0.01µF capacitor + 10µF bulk cap. This preserves stability while reducing broadband noise below 15µVP-P.
Does the ISL21009CFB825Z-TK require external trimming to achieve its ±1.0mV initial accuracy?
No - the ±1.0mV initial accuracy of the ISL21009CFB825Z-TK is guaranteed at +25°C without trimming. The TRIM pin provides optional ±2.5% adjustment for system-level calibration, but it is not needed to meet datasheet specifications. Leaving TRIM unconnected maintains factory-trimmed performance and avoids introducing tempco errors from external resistors.
How does the ISL21009CFB825Z-TK perform under thermal cycling stress?
The ISL21009CFB825Z-TK exhibits ≤50ppm thermal hysteresis after cycling from –40°C to +125°C and back to +25°C. This means the output voltage shift between first and second +25°C measurements is bounded - critical for applications like automated test equipment where repeated thermal exposure must not degrade reference stability over time. The FGA™ process inherently minimizes hysteresis versus conventional bandgap references.
Is the ISL21009CFB825Z-TK compatible with Pb-free reflow processes?
Yes - the ISL21009CFB825Z-TK is Pb-free (RoHS compliant) and qualified for standard Pb-free reflow profiles. Post-reflow output shift is typically 100µV to 1.0mV; designers should verify final reference voltage after assembly and allow margin in system accuracy budgets. Avoid excessive soak times or peak temperatures above 260°C to preserve initial accuracy.
ISL21009CFB825Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- FGA™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 7 mA
- Tolerance:
- ±0.08%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 4.5µVp-p
- Noise - 10Hz to 10kHz:
- 22µVrms
- Voltage - Input:
- 3.5V ~ 16.5V
- Current - Supply:
- 180µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL21009CFB825Z-TK FAQ
1.How can I place an order for ISL21009CFB825Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL21009CFB825Z-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 ISL21009CFB825Z-TK reliable?
The price and inventory of ISL21009CFB825Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL21009CFB825Z-TK is usually 5 days.
3.What payment methods are accepted for ISL21009CFB825Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL21009CFB825Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL21009CFB825Z-TK?
ISL21009CFB825Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL21009CFB825Z-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 ISL21009CFB825Z-TK?
For technical support, including ISL21009CFB825Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL21009CFB825Z-TK requirements.
6.How does Aetrix verify that ISL21009CFB825Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL21009CFB825Z-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 ISL21009CFB825Z-TK meets industry standards.
7.What is the process for return or replacement of ISL21009CFB825Z-TK?
All ISL21009CFB825Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL21009CFB825Z-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 ISL21009CFB825Z-TK part is unused and in its original packaging.
Return procedure for ISL21009CFB825Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL21009CFB825Z-TK Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
