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Renesas ISL21009BFB812Z-TK
- Part No.:
- ISL21009BFB812Z-TK
- Manufacturer:
- Renesas
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL21009BFB812Z-TK.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,558
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Product details
Overview
ISL21009BFB812Z-TK from Intersil is a high-voltage-input, precision, low-noise floating-gate analog (FGA) voltage reference delivering 1.250V output with ±0.5mV initial accuracy, 3ppm/°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 drive - enabling use in high-resolution data acquisition systems where stability, low power, and ultra-low noise are critical.
For engineers reviewing the ISL21009BFB812Z-TK datasheet, ISL21009BFB812Z-TK pinout, ISL21009BFB812Z-TK application, or ISL21009BFB812Z-TK equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings for instrumentation and metrology, and two confirmed alternative parts with documented performance trade-offs.
Technical Context
The ISL21009BFB812Z-TK uses Intersil's proprietary Floating Gate Analog (FGA) technology to achieve ultra-stable reference voltage generation without bandgap or Zener constraints. Its buffered output stage delivers 1.250V with guaranteed ±0.5mV accuracy at +25°C and 3ppm/°C drift over –40°C to +125°C.
It features a high-impedance TRIM pin allowing ±2.5% output adjustment via external potentiometer, and supports load currents up to ±7.0mA with load regulation of 10–50µV/mA (sourcing) and 20–100µV/mA (sinking). Input line regulation is specified as 10–150µV/V across its 3.5V–16.5V operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.250V ±0.5mV at +25°C - enables direct interface with 12-bit ADCs requiring sub-LSB reference stability |
| Tempco | 3ppm/°C - ensures ≤207µV total drift over –40°C to +125°C (ΔT = 165°C), critical for industrial sensor front-ends |
| Noise (0.1–10Hz) | 4.5µVP-P - supports 16+ ENOB in precision digitizers without external filtering |
| Supply Current | ≤180µA max - allows battery-powered handheld meters to operate >1 year on coin cell |
| Input Range | 3.5V to 16.5V - accommodates unregulated 12V rails and wide-input industrial supplies without LDO pre-regulation |
| Output Drive | ±7.0mA - sufficient to drive ADC reference inputs, op-amp buffers, and DAC bias networks directly |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and base station power monitoring |
Pinout & Package
ISL21009BFB812Z-TK is housed in an 8-lead SOIC (M8.15, Pb-free, RoHS-compliant) with 1.27mm pitch. The package is surface-mount, moisture-sensitive level 1, and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND or NC | Ground connection or no-connect - must be tied to system ground for stable operation; NC option unused |
| 2 | VIN | Power supply input - accepts 3.5V–16.5V; internal regulator enables wide-input tolerance |
| 3, 7, 8 | DNC | Do Not Connect - internal die connections; floating per datasheet to prevent parasitic coupling |
| 4 | GND | Dedicated ground return - separate from Pin 1 for improved PSRR and noise rejection |
| 5 | TRIM or NC | High-impedance trim input - enables ±2.5% output adjustment using external potentiometer; leave open if unused |
| 6 | VOUT | Precision reference output - buffered 1.250V source with low output impedance (<1Ω @ DC) and 100µs turn-on settling |
Key Features
| Feature | Design Value |
|---|---|
| FGA™ Technology | Zero-drift floating gate charge storage eliminates aging-related drift and enables <50ppm long-term stability |
| Ultra-Low Noise | 4.5µVP-P (0.1–10Hz) - reduces quantization uncertainty in 24-bit sigma-delta ADCs without post-filtering |
| Micropower Operation | 95µA typical supply current - extends battery life in portable multimeters and IoT sensor nodes |
| Wide Input Range | 3.5V–16.5V - eliminates need for pre-regulator in 12V industrial systems and automotive auxiliary rails |
| High Accuracy Grade | ±0.5mV initial error - matches 16-bit DAC full-scale requirements without calibration |
Applications
| High-Resolution Data Acquisition | Digital Panel Meters |
|---|---|
Use Scenario: 16-bit SAR ADC system measuring thermocouple or strain gauge signals in industrial PLC modules. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion, providing stable VREF input with minimal code-width variation. Use Value: 3ppm/°C tempco and 4.5µVP-P noise ensure <±0.5 LSB integral nonlinearity over temperature and time. |
Use Scenario: Portable handheld digital multimeter with auto-ranging and 4½-digit display. IC Role / Device Role / Timing Role: Precision reference for dual-slope integrator and ADC reference path. Use Value: 180µA max supply current enables >500-hour battery life on 9V alkaline; ±0.5mV accuracy supports Class 0.1 meter certification. |
| Bar Code Scanner Analog Front-End | Battery Management Monitoring |
Use Scenario: Laser diode driver and photodiode signal conditioning in handheld barcode scanners. IC Role / Device Role / Timing Role: Reference for transimpedance amplifier gain setting and ADC full-scale calibration. Use Value: Low 1.250V output minimizes headroom loss in 3.3V systems; 100µs turn-on time aligns with scanner wake-up sequencing. |
Use Scenario: Cell voltage monitoring in 4S Li-ion battery packs for UPS and power tools. IC Role / Device Role / Timing Role: Stable reference for multiplexed ADC channel measuring individual cell voltages. Use Value: –40°C to +125°C rating ensures accuracy across full battery operating range; 7mA sink capability drives multiplexer bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3412ARJZ-R7 | 1.2V output, ±1.2mV initial accuracy, 10ppm/°C tempco, 3.5µVP-P noise, 125µA supply current | Lower output voltage limits compatibility with 1.25V ADC references; higher tempco increases drift in wide-temp environments | Prefer when lower supply current is prioritized over absolute accuracy and thermal stability |
| REF102BP | 1.25V output, ±0.5mV accuracy, 5ppm/°C tempco, 5.5µVP-P noise, 200µA supply current | Higher noise and current reduce battery life and ENOB in ultra-low-noise systems; same pinout not supported | Acceptable where moderate noise and wider tempco are tolerable, but requires PCB redesign due to TO-99 metal can package |
Compared with ADR3412ARJZ-R7 and REF102BP, the ISL21009BFB812Z-TK delivers superior thermal stability (3ppm/°C vs. 5–10ppm/°C) and lower noise (4.5µVP-P) while maintaining identical 1.25V output and tighter initial accuracy - making it optimal for metrology-grade designs where reference-induced error must remain below 0.01% over temperature.
Availability
ISL21009BFB812Z-TK is available at Aetrix Electronics and suitable for high-resolution data acquisition, portable instrumentation, and battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL21009BFB812Z-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, is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.
The ISL21009 family was designed specifically for high-accuracy, low-power voltage reference applications in portable test equipment, precision sensors, and data converters - leveraging FGA technology to overcome traditional bandgap limitations in drift and noise.
FAQ
What is the maximum input voltage rating for the ISL21009BFB812Z-TK?
The ISL21009BFB812Z-TK has an absolute maximum VIN-to-GND rating of +18V. Its recommended operating input voltage range is 3.5V to 16.5V. Exceeding +18V may cause permanent damage. The device maintains specified performance across its full 16.5V operating limit, making it suitable for unregulated 12V and 15V industrial rails.
Can the ISL21009BFB812Z-TK drive a 10µF output capacitor directly?
No - the ISL21009BFB812Z-TK output stage is not optimized for heavy capacitive loads. Datasheet Figure 58 recommends using an RC network (e.g., 2kΩ + 10µF) for capacitances ≥0.01µF. Direct connection of 10µF risks instability, overshoot, and prolonged settling (>1ms), degrading measurement repeatability in fast-sampling systems.
Does the ISL21009BFB812Z-TK require external trimming to achieve ±0.5mV accuracy?
No - the "B" grade in ISL21009BFB812Z-TK denotes factory-trimmed ±0.5mV initial accuracy at +25°C. The TRIM pin (Pin 5) is optional and only needed for field calibration or fine-tuning beyond factory spec. Leaving it unconnected maintains full rated accuracy without additional components.
How does X-ray exposure affect the ISL21009BFB812Z-TK during post-assembly inspection?
X-ray inspection can permanently shift the ISL21009BFB812Z-TK output voltage by 100µV to 1mV due to FGA charge perturbation. If required, use zinc shielding (300µm) or minimize exposure duration. For airport luggage screening, >100 passes through carry-on scanners or >2–3 passes through checked-baggage systems may exceed 500µV drift - board-level copper shielding is advised.
What is the turn-on settling time specification for the ISL21009BFB812Z-TK?
The ISL21009BFB812Z-TK has a typical turn-on settling time of 100µs to within ±0.1% of final VOUT, as measured in Figure 11 and Table on page 4 of FN6327.7. This parameter is critical for power-sequenced systems - designers must ensure ADC conversion is gated until after this interval to avoid reference-related gain errors.
ISL21009BFB812Z-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):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 7 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 3ppm/°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
ISL21009BFB812Z-TK FAQ
1.How can I place an order for ISL21009BFB812Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL21009BFB812Z-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 ISL21009BFB812Z-TK reliable?
The price and inventory of ISL21009BFB812Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL21009BFB812Z-TK is usually 5 days.
3.What payment methods are accepted for ISL21009BFB812Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL21009BFB812Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL21009BFB812Z-TK?
ISL21009BFB812Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL21009BFB812Z-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 ISL21009BFB812Z-TK?
For technical support, including ISL21009BFB812Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL21009BFB812Z-TK requirements.
6.How does Aetrix verify that ISL21009BFB812Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL21009BFB812Z-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 ISL21009BFB812Z-TK meets industry standards.
7.What is the process for return or replacement of ISL21009BFB812Z-TK?
All ISL21009BFB812Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL21009BFB812Z-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 ISL21009BFB812Z-TK part is unused and in its original packaging.
Return procedure for ISL21009BFB812Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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