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Analog Devices Inc. LT1009CZ#PBF
- Part No.:
- LT1009CZ#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LT1009CZ#PBF.pdf
- Description:
- IC VREF SHUNT 0.2% TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:685
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Product details
Overview
LT1009CZ#PBF from Analog Devices (formerly Linear Technology) is a precision 2.5V shunt voltage reference in a 3-lead plastic TO-92 package, featuring ±5 mV initial tolerance (0.2%), 0.6 Ω max dynamic impedance, and 25 ppm/°C max temperature coefficient over 0°C to 70°C. It serves as a stable reference for ADC/DAC circuits, power supply monitors, and current-loop systems requiring low-drift calibration.
For engineers reviewing the LT1009CZ#PBF datasheet, LT1009CZ#PBF pinout, LT1009CZ#PBF application, or LT1009CZ#PBF equivalent, key selection criteria include guaranteed 0.2% initial accuracy, ±5% external trim capability, TO-92 thermal resistance of 160°C/W, and direct interchangeability with LM136 in legacy designs without layout changes.
Technical Context
The LT1009CZ#PBF uses on-chip laser trimming to achieve 0.2% initial voltage tolerance and minimize temperature drift across its 0°C to 70°C operating range. Its bandgap-based architecture delivers stable 2.500 V output at 1 mA reverse current with guaranteed 15 mV total variation over temperature.
It operates as a two-terminal shunt regulator with a third ADJ terminal enabling ±5% output adjustment via external resistors-without affecting temperature coefficient. The device maintains ≤0.6 Ω dynamic impedance from 400 μA to 10 mA reverse current, supporting wide-range load regulation in unregulated supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±5 mV at 1 mA - ensures precise 2.5V reference for 8-bit data converters requiring <0.2% full-scale error. |
| Initial Tolerance | 0.2% - eliminates need for post-assembly calibration in cost-sensitive industrial instrumentation. |
| Temp Coefficient | 25 ppm/°C max - limits drift to ±1.875 mV over 0°C–70°C, critical for stable current-loop transmitters. |
| Dynamic Impedance | 0.6 Ω max at 1 mA - enables tight regulation under varying load currents in battery-powered sensor nodes. |
| Operating Current | 400 μA to 10 mA - supports ultra-low-power operation down to 100 μW while maintaining accuracy. |
| Long-Term Stability | 20 ppm/kHr - guarantees minimal aging-induced drift in 10-year deployed monitoring equipment. |
Pinout & Package
LT1009CZ#PBF is housed in a 3-lead plastic TO-92 package (Z package), with lead-to-case thermal resistance θJA = 160°C/W and maximum junction temperature of 100°C. Pin 1 is Cathode (–), Pin 2 is Anode (+), and Pin 3 is Adjust (ADJ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (–) | Cathode | Reference output node; connects to system ground or regulated return path in shunt configuration. |
| Pin 2 (+) | Anode | Current sink input; ties to unregulated supply rail through series resistor to set operating current. |
| Pin 3 (ADJ) | Adjust Terminal | Enables ±5% output scaling via external resistor divider; does not impact temperature coefficient. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed 2.5V reference | 0.2% initial accuracy achieved via on-die trimming-reduces BOM count by eliminating external calibration potentiometers. |
| ±5% adjustable output | Third ADJ pin allows system-level calibration to compensate for PCB trace resistance and DAC offset errors. |
| Low dynamic impedance | 0.6 Ω max ensures <1 mV load regulation error across 400 μA–10 mA operating range. |
| LM136 drop-in replacement | Pins 1–2–3 match LM136 TO-92 footprint-enables performance upgrade without PCB redesign. |
| Guaranteed temp stability | 15 mV total variation over 0°C–70°C-meets industrial-grade requirements for power supply monitors. |
Applications
| Reference for 5V Systems | 8-Bit A/D and D/A Reference |
|---|---|
Use Scenario: Providing stable 2.5V reference for microcontroller ADCs measuring 0–5V inputs using internal 2× gain scaling. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise midpoint for ratiometric conversion. Use Value: 0.2% initial tolerance ensures <1 LSB error in 8-bit conversions without software correction. | Use Scenario: Serving as reference for serial DACs in programmable current-source modules for 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Precision analog reference defining full-scale output voltage of digital-to-analog conversion. Use Value: 25 ppm/°C tempco limits output drift to <±0.5 LSB over industrial temperature range. |
| Digital Voltmeters | Power Supply Monitor |
Use Scenario: Calibrating handheld DVMs where 3½-digit resolution requires sub-10 mV reference stability. IC Role / Device Role / Timing Role: Primary voltage standard against which input attenuators and integrators are calibrated. Use Value: 20 ppm/kHr long-term stability ensures calibration validity over 12-month service intervals. | Use Scenario: Monitoring +5V and +3.3V rails in embedded controllers to trigger brownout resets before logic failure. IC Role / Device Role / Timing Role: Stable threshold generator feeding comparator inputs for undervoltage detection. Use Value: Low 0.6 Ω dynamic impedance prevents reference sag during transient load steps, ensuring reliable trip points. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM136Z-2.5 | 0.5% initial tolerance, 50 ppm/°C tempco, no ADJ pin | Lacks trim capability; higher drift limits use in precision metering | Select when cost is primary constraint and ±0.5% accuracy suffices |
| TL431ACZ | 2.495V nominal, 1% tolerance, adjustable via resistor divider, 50 ppm/°C | Requires external resistors for 2.5V setting; higher tempco increases calibration burden | Choose for high-volume consumer applications where 1% tolerance is acceptable |
Compared with LM136Z-2.5 and TL431ACZ, the LT1009CZ#PBF delivers superior 0.2% accuracy and 25 ppm/°C stability-critical for industrial sensors and test equipment-while retaining LM136 pin compatibility and adding ±5% trim without external components.
Availability
LT1009CZ#PBF is available at Aetrix Electronics and suitable for industrial instrumentation, power supply monitoring, and precision data acquisition systems requiring stable component supply across extended production cycles.
Supply support for LT1009CZ#PBF 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
Analog Devices acquired Linear Technology in 2017 and maintains its precision analog portfolio, including voltage references, op amps, and power management ICs for high-reliability applications.
The LT1009 series was designed specifically for applications demanding high-accuracy, low-drift shunt references in space-constrained TO-92 and MSOP packages-targeting industrial control, test equipment, and legacy system upgrades.
FAQ
What is the operating temperature range for LT1009CZ#PBF?
The LT1009CZ#PBF is rated for operation from 0°C to 70°C. This commercial-grade temperature range is specified in the official Linear Technology datasheet and applies to all electrical characteristics unless otherwise noted. The device's thermal resistance (θJA = 160°C/W) and maximum junction temperature of 100°C ensure reliable performance within this ambient range when mounted on standard FR-4 PCBs with typical copper pour.
Does LT1009CZ#PBF require external components to function as a 2.5V reference?
No, the LT1009CZ#PBF functions as a complete 2.5V shunt reference with only a single series current-setting resistor between the unregulated supply and the anode (Pin 2). Its laser-trimmed core delivers 2.500 V ±5 mV at 1 mA without external calibration. The ADJ pin (Pin 3) is optional and used only when ±5% output adjustment is needed to correct system-level errors.
Can LT1009CZ#PBF replace LM136 in existing designs?
Yes, the LT1009CZ#PBF is explicitly documented as a pin-to-pin replacement for the LM136 in TO-92 packages. Both share identical pinout (Cathode–Anode–ADJ), voltage rating, and basic shunt regulator functionality. Upgrading to LT1009CZ#PBF improves initial accuracy from 0.5% to 0.2% and reduces temperature coefficient from 50 ppm/°C to 25 ppm/°C without any PCB modifications.
What is the maximum reverse current rating for LT1009CZ#PBF?
The absolute maximum reverse current for LT1009CZ#PBF is 20 mA, as specified in the Absolute Maximum Ratings table. For reliable long-term operation, the recommended operating reverse current range is 400 μA to 10 mA. Operating above 10 mA increases self-heating and may degrade long-term stability, while currents below 400 μA risk increased dynamic impedance and reduced regulation accuracy.
How does the ADJ pin on LT1009CZ#PBF affect temperature coefficient?
The ADJ pin on LT1009CZ#PBF enables ±5% output voltage adjustment via external resistors but does not affect the temperature coefficient-the datasheet explicitly states "DOES NOT AFFECT TEMPERATURE COEFFICIENT." The trimmed bandgap core maintains its specified 25 ppm/°C max drift regardless of ADJ pin configuration, preserving stability in calibrated systems across temperature extremes.
LT1009CZ#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bag
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 400 µA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LT1009CZ#PBF FAQ
1.How can I place an order for LT1009CZ#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1009CZ#PBF 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 LT1009CZ#PBF reliable?
The price and inventory of LT1009CZ#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1009CZ#PBF is usually 5 days.
3.What payment methods are accepted for LT1009CZ#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1009CZ#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1009CZ#PBF?
LT1009CZ#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1009CZ#PBF 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 LT1009CZ#PBF?
For technical support, including LT1009CZ#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1009CZ#PBF requirements.
6.How does Aetrix verify that LT1009CZ#PBF is sourced from the original manufacturer or authorized distributors?
All LT1009CZ#PBF 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 LT1009CZ#PBF meets industry standards.
7.What is the process for return or replacement of LT1009CZ#PBF?
All LT1009CZ#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1009CZ#PBF, 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 LT1009CZ#PBF part is unused and in its original packaging.
Return procedure for LT1009CZ#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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