My Inquiry
My Account
Renesas ISL21009CFB850Z-TK
- Part No.:
- ISL21009CFB850Z-TK
- Manufacturer:
- Renesas
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL21009CFB850Z-TK.pdf
- Description:
- IC VREF SERIES 0.08% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL21009CFB850Z-TK from Intersil is a high-voltage-input, precision, low-noise voltage reference IC delivering a stable 5.000V output with ±1.0mV initial accuracy, 5ppm/°C temperature coefficient, and 4.5µVP-P (0.1Hz–10Hz) output noise. It operates from 5.5V to 16.5V input, draws ≤180µA supply current, and supports ±7.0mA output drive-ideal for high-resolution ADC/DAC biasing in battery-powered instrumentation.
For engineers reviewing the ISL21009CFB850Z-TK datasheet, ISL21009CFB850Z-TK pinout, ISL21009CFB850Z-TK application, or ISL21009CFB850Z-TK equivalent, key selection criteria include its micropower operation, low thermal hysteresis (50ppm), guaranteed load regulation (≤100µV/mA sourcing), and SOIC-8 packaging compatible with industrial (-40°C to +125°C) environments.
Technical Context
The ISL21009CFB850Z-TK employs Intersil's proprietary Floating Gate Analog (FGA) technology to achieve ultra-low drift without bandgap or zener limitations. Its buffered output stage delivers 5.000V with minimal sensitivity to supply variation (line regulation: 20–90µV/V over 5.5V–16.5V) and load current (load regulation: 10–150µV/mA).
Designed for precision analog signal chains, it features a high-impedance TRIM pin enabling ±2.5% output adjustment via external potentiometer, while its 100µs turn-on settling time and 60dB ripple rejection at 10kHz support fast, clean power-up in data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±1.0mV at +25°C - enables direct full-scale reference for 12-bit+ SAR ADCs without calibration. |
| Tempco | 5ppm/°C - ensures ≤0.83mV total drift across -40°C to +125°C, critical for uncalibrated field instruments. |
| Noise (0.1–10Hz) | 4.5µVP-P - limits quantization error in 24-bit delta-sigma ADCs used in digital meters. |
| Supply Current | ≤180µA - allows continuous operation for >1 year on a single CR2032 coin cell in portable bar code scanners. |
| Input Voltage Range | 5.5V to 16.5V - supports direct connection to 12V industrial rails or buck-boost converter outputs. |
| Output Drive | ±7.0mA - sufficient to drive 10kΩ DAC reference inputs or buffer amplifiers without gain error. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive sensors and base station power monitoring. |
Pinout & Package
ISL21009CFB850Z-TK is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, M8.15 drawing), RoHS-compliant with 100% matte tin finish and 115°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND or NC | Ground connection or no-connect; must be tied to system ground for stable reference operation. |
| 2 | VIN | Power input (5.5V–16.5V); decoupling capacitor required within 1cm for PSRR optimization. |
| 4 | GND | Dedicated ground return path; separate from Pin 1 to minimize ground bounce in mixed-signal layouts. |
| 5 | TRIM or NC | High-impedance trim input; connect external potentiometer wiper for ±2.5% output adjustment. |
| 6 | VOUT | 5.000V precision reference output; requires local 0.001µF ceramic capacitor for stability. |
| 3, 7, 8 | DNC | Do-not-connect pins; internal floating nodes-must remain unconnected to avoid parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| FGA™ Technology | Enables 5ppm/°C tempco and ±1.0mV initial accuracy without laser trimming or post-package adjustment. |
| Low Noise Architecture | 4.5µVP-P (0.1–10Hz) output noise directly supports 20-bit+ effective resolution in precision data loggers. |
| Micropower Operation | 95µA typical supply current allows integration into always-on sensor nodes with <1µA sleep current budgets. |
| Wide Input Range | 5.5V–16.5V operation eliminates need for pre-regulation in 12V battery or PoE-powered equipment. |
| Trim Capability | ±2.5% output adjustability via TRIM pin enables system-level calibration without hardware changes. |
Applications
| High-Resolution Data Acquisition | Digital Panel Meters |
|---|---|
Use Scenario: 24-bit delta-sigma ADC in portable environmental monitor measuring temperature, humidity, and gas concentration. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale range for ADC conversion. Use Value: 4.5µVP-P noise and 5ppm/°C tempco ensure <0.005% measurement uncertainty across operating temperature. | Use Scenario: 4½-digit handheld multimeter requiring stable 5.000V reference for autoranging and auto-zero functions. IC Role / Device Role / Timing Role: Precision DC reference source for dual-slope integrator and comparator thresholds. Use Value: ±1.0mV initial accuracy and 50ppm long-term stability eliminate factory recalibration for 2-year service intervals. |
| Industrial Battery Monitoring | Cellular Base Station Power Management |
Use Scenario: Li-ion pack voltage monitoring in UPS systems with 16-cell stacks (0–67.2V range). IC Role / Device Role / Timing Role: Reference for isolated ADC measuring individual cell voltages via resistive dividers. Use Value: 16.5V max input and -40°C to +125°C rating enable direct connection to high-side sensing circuits without level-shifting. | Use Scenario: Power rail supervision in LTE macro base station RF power amplifier modules. IC Role / Device Role / Timing Role: Reference for analog front-end monitoring of +48V DC-DC converter output and backup battery status. Use Value: 60dB PSRR at 10kHz rejects switching noise from adjacent DC-DC converters, preventing false fault triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050IDR | 5.0V output, ±0.25mV initial accuracy, 3ppm/°C tempco, 100µA supply current, SOIC-8 | Higher accuracy and lower drift but higher cost; requires 3.3V–18V input (not optimized for 12V-only rails) | Select for metrology-grade systems where ±0.25mV accuracy justifies premium pricing and layout space for external decoupling. |
| ADR4550BRZ | 5.0V output, ±0.25mV initial accuracy, 3ppm/°C tempco, 950µA supply current, SOIC-8 | Higher power consumption; superior noise (3.75µVP-P) but incompatible with battery-operated designs | Choose when lowest possible noise dominates over power budget, e.g., laboratory-grade DAQ systems with AC power. |
Compared with REF5050IDR and ADR4550BRZ, the ISL21009CFB850Z-TK offers optimal balance of micropower operation (≤180µA), industrial temperature range, and SOIC-8 compatibility-making it preferred for cost-sensitive, battery-backed instrumentation where 5ppm/°C drift and ±1.0mV accuracy meet system requirements.
Availability
ISL21009CFB850Z-TK is available at Aetrix Electronics and suitable for high-resolution A/D converters, digital panel meters, and industrial battery monitoring systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ISL21009CFB850Z-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, communications, and aerospace markets.
The ISL21009 family was designed specifically for high-accuracy, low-power voltage reference applications in portable test equipment, energy metering, and base station infrastructure-leveraging FGA technology to eliminate traditional trimming and improve long-term stability.
FAQ
What is the maximum input voltage rating for the ISL21009CFB850Z-TK?
The absolute maximum voltage rating for VIN relative to GND is +18V. However, the recommended operating input voltage range is 5.5V to 16.5V per the datasheet. Exceeding 16.5V may degrade long-term stability or cause irreversible parametric shift, especially under elevated temperature conditions. The ISL21009CFB850Z-TK must never be operated above +18V, even momentarily.
Can the ISL21009CFB850Z-TK drive a 10µF output capacitor directly?
No-the ISL21009CFB850Z-TK output stage is not optimized for heavy capacitive loads. Driving >0.001µF directly causes instability and overshoot. For 10µF bulk capacitance, use the RC noise reduction network shown in Figure 58: a 2kΩ series resistor followed by a 10µF capacitor to ground, with the 0.01µF capacitor placed between VOUT and the RC node. This preserves stability while reducing broadband noise.
Does the ISL21009CFB850Z-TK require external trimming to achieve its specified ±1.0mV accuracy?
No-the ISL21009CFB850Z-TK achieves ±1.0mV initial accuracy at +25°C without any external trimming. Its FGA™ floating gate technology sets the reference voltage during manufacturing. The TRIM pin is optional and only needed if system-level calibration or field adjustment (±2.5%) is required. Using the TRIM pin does not improve initial accuracy beyond the datasheet specification.
How does post-reflow soldering affect the output voltage of the ISL21009CFB850Z-TK?
Post-reflow voltage shift for the ISL21009CFB850Z-TK typically ranges from 100µV to 1.0mV due to mechanical stress on the FGA die during Pb-free reflow. This shift is non-recoverable and must be accounted for in final system calibration. To minimize impact, avoid excessive thermal mass near the device, limit reflow dwell time above 220°C, and consider post-assembly verification of VOUT before functional testing.
Is the ISL21009CFB850Z-TK compatible with X-ray inspection after assembly?
X-ray inspection can permanently shift the output voltage of the ISL21009CFB850Z-TK due to ionizing radiation affecting the floating gate charge. If X-ray inspection is unavoidable, implement shielding: a 300µm zinc sheet or two layers of ½-ounce copper planes reduces dose by >90%. Monitor VOUT post-inspection; shifts >500µV indicate excessive exposure and require rework or system recalibration.
ISL21009CFB850Z-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):
- 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:
- 5.5V ~ 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
ISL21009CFB850Z-TK FAQ
1.How can I place an order for ISL21009CFB850Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL21009CFB850Z-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 ISL21009CFB850Z-TK reliable?
The price and inventory of ISL21009CFB850Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL21009CFB850Z-TK is usually 5 days.
3.What payment methods are accepted for ISL21009CFB850Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL21009CFB850Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL21009CFB850Z-TK?
ISL21009CFB850Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL21009CFB850Z-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 ISL21009CFB850Z-TK?
For technical support, including ISL21009CFB850Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL21009CFB850Z-TK requirements.
6.How does Aetrix verify that ISL21009CFB850Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL21009CFB850Z-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 ISL21009CFB850Z-TK meets industry standards.
7.What is the process for return or replacement of ISL21009CFB850Z-TK?
All ISL21009CFB850Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL21009CFB850Z-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 ISL21009CFB850Z-TK part is unused and in its original packaging.
Return procedure for ISL21009CFB850Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL21009CFB850Z-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…
