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Texas Instruments LT1004ID-2-5
- Part No.:
- LT1004ID-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1004ID-2-5.pdf
- Description:
- IC VREF SHUNT 0.8% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:695
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Product details
Overview
LT1004ID-2-5 from Texas Instruments is a two-terminal micropower band-gap voltage reference IC delivering 2.5 V nominal output with ±20 mV initial accuracy, 20 ppm/°C temperature coefficient, and 0.2 Ω typical reference impedance at 100 µA. It operates from 8 µA to 20 mA and supports precision applications in battery-powered instrumentation and current-loop systems.
For engineers reviewing the LT1004ID-2-5 datasheet, LT1004ID-2-5 pinout, LT1004ID-2-5 application, or LT1004ID-2-5 equivalent, key selection criteria include its industrial-grade −40°C to 85°C operating range, low 60 µV RMS broadband noise (10 Hz–10 kHz), and compatibility with LM285/LM385-based designs requiring improved accuracy and micropower operation.
Technical Context
The LT1004ID-2-5 implements a precision band-gap reference core with on-chip trimming for tight initial voltage tolerance and low thermal drift. Its two-terminal architecture simplifies integration into high-impedance bias networks and floating reference configurations.
It features ultra-low quiescent current (IZ(min) = 10 µA), stable performance across full industrial temperature range, and low dynamic impedance (≤1.5 Ω over full current and temperature range), enabling use in low-noise, high-stability analog signal chains without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Reference Voltage | 2.5 V - Stable output used as precision voltage source for ADCs, DACs, and sensor excitation circuits |
| Initial Accuracy | ±20 mV - Ensures ≤0.8% absolute error at 25°C without calibration |
| Tempco (Avg) | 20 ppm/°C - Predictable drift of ≤0.5 mV over −40°C to 85°C span |
| Reference Impedance | 0.2 Ω (typ @ 100 µA) - Minimizes load-induced voltage shift in high-gain feedback paths |
| Min Operating Current | 10 µA - Enables operation from microamp-level bias sources like leakage currents or high-value resistors |
| Noise (10 Hz–10 kHz) | 60 µV RMS - Low enough for 16-bit+ data acquisition without additional filtering |
| Operating Temp Range | −40°C to 85°C - Qualified for industrial environments without derating |
Pinout & Package
LT1004ID-2-5 is housed in an 8-pin SOIC (D package), with pins 1–4 and 6–8 internally unconnected (NC); only pins 5 (Anode) and 7 (Cathode) are functional terminals. This two-terminal configuration eliminates need for separate supply or ground connections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 5) | Reference output terminal | Connected to load or feedback node; sinks current when used as shunt reference |
| Cathode (Pin 7) | Reference return terminal | Typically tied to system ground or regulated rail; defines reference potential |
| Pins 1–4, 6, 8 | No internal connection | Unused; must remain unconnected or grounded per layout best practices to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | Operates down to 10 µA - Enables multi-year battery life in portable meters and remote sensors |
| Low reference impedance | 0.2 Ω typical - Reduces sensitivity to load variations and improves regulation under dynamic conditions |
| Industrial temperature rating | −40°C to 85°C - Supports deployment in automotive under-hood, factory automation, and outdoor equipment |
| Pin-for-pin replacement | Direct drop-in for LM285-2.5 and LM385-2.5 - Allows upgrade without PCB redesign or firmware changes |
| Low broadband noise | 60 µV RMS (10 Hz–10 kHz) - Preserves SNR in precision measurement front-ends without added filtering |
Applications
| Portable Meter Reference | Current-Loop Instrumentation |
|---|---|
Use Scenario: Used as stable 2.5 V reference in handheld multimeters and clamp meters powered by 9 V alkaline batteries. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing excitation voltage for ADC reference input and sensor bridges. Use Value: Delivers <0.8% initial error and <0.5 mV total drift over temperature, enabling 4½-digit accuracy without calibration. | Use Scenario: Serves as precision voltage setpoint in 4–20 mA transmitter circuits for pressure and temperature transducers. IC Role / Device Role / Timing Role: Reference element in op-amp-based current source topology, defining loop compliance voltage. Use Value: Low 10 µA minimum current allows operation from low-voltage loop supplies (e.g., 12 V), while 20 ppm/°C tempco ensures <0.1% span error over field temperature range. |
| Battery-Operated Systems | Portable Test Instruments |
Use Scenario: Powers analog front-end of IoT environmental sensor nodes using coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Micropower voltage reference for low-power ADCs and comparators in sleep/wake architectures. Use Value: 10 µA min current enables direct connection to high-value bias resistors, eliminating active regulators and extending battery life beyond 5 years. | Use Scenario: Provides calibrated reference in portable oscilloscope probes and signal generators with integrated calibration routines. IC Role / Device Role / Timing Role: Primary reference for internal DACs and offset correction circuitry during self-calibration sequences. Use Value: 60 µV RMS noise and 0.2 Ω impedance ensure sub-LSB errors in 16-bit DAC outputs, supporting traceable metrology-grade performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM385BD-2.5 | ±30 mV initial accuracy, 100 ppm/°C tempco, 1.5 Ω impedance, 10 µA min current | Lower accuracy and higher drift limit use in <12-bit systems; less suitable for industrial temp range | Select when cost is primary constraint and 1% tolerance is acceptable |
| REF3025AIDBZR | ±12 mV initial accuracy, 50 ppm/°C tempco, 0.25 Ω impedance, 50 µA min current | Higher quiescent current prevents use in ultra-low-power designs; better accuracy for mid-tier applications | Select when tighter initial tolerance is required and supply can support ≥50 µA continuous draw |
Compared with LM385BD-2.5, LT1004ID-2-5 offers 1.5× better initial accuracy and 5× lower tempco, enabling higher-resolution measurements; versus REF3025AIDBZR, it draws 5× less minimum current but trades 40% higher initial error-ideal for battery-limited systems where long-term stability outweighs initial calibration needs.
Availability
LT1004ID-2-5 is available at Aetrix Electronics and suitable for portable meter reference, current-loop instrumentation, and battery-operated systems requiring stable component supply across extended production lifecycles.
Supply support for LT1004ID-2-5 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision analog ICs and voltage references.
The LT1004 series was designed specifically for micropower, high-accuracy voltage referencing in portable and industrial instrumentation-prioritizing low drift, minimal operating current, and robustness across wide temperature ranges.
FAQ
What is the operating temperature range of the LT1004ID-2-5?
The LT1004ID-2-5 is characterized for operation from −40°C to 85°C, meeting industrial-grade reliability requirements. This range is confirmed in the TI SLVS022M datasheet under "recommended operating conditions" for the LT1004I grade. The 'I' suffix explicitly denotes the industrial temperature qualification, distinguishing it from the commercial-grade LT1004C (0°C to 70°C). No derating is required within this span.
Can the LT1004ID-2-5 replace the LM285-2.5 directly?
Yes, the LT1004ID-2-5 is specified by Texas Instruments as a pin-for-pin replacement for the LM285 and LM385 series, including LM285-2.5. Both devices use identical two-terminal SOIC-8 packaging with Anode on pin 5 and Cathode on pin 7. Electrical improvements-including tighter initial accuracy (±20 mV vs ±30 mV) and lower tempco (20 ppm/°C vs 100 ppm/°C)-are achieved without layout changes.
What is the minimum cathode current required for regulation in the LT1004ID-2-5?
The LT1004ID-2-5 requires a minimum cathode current (IZ(min)) of 10 µA to maintain regulation, as specified in the "electrical characteristics" table of the SLVS022M datasheet. This value applies across the full −40°C to 85°C operating range. Operation below this threshold results in undefined output voltage and increased sensitivity to load and temperature variations.
How does the LT1004ID-2-5 achieve low noise performance?
The LT1004ID-2-5 achieves 60 µV RMS broadband noise (10 Hz–10 kHz) through optimized band-gap core design, low-impedance internal node buffering, and careful die-level trimming. Its 0.2 Ω typical reference impedance minimizes current-to-voltage conversion of internal noise sources. Measured noise is specified at 100 µA operating current and 25°C, with no external filtering required for most 16-bit data acquisition applications.
Is the LT1004ID-2-5 RoHS compliant and lead-free?
Yes, the LT1004ID-2-5 is RoHS compliant and lead-free. Per TI's Package Option Addendum, the device carries a "Green (RoHS & no Sb/Br)" eco plan with "NIPDAU" (nickel-palladium-gold) lead finish and complies with JEDEC MSL Level-1 moisture sensitivity classification. This confirms full conformance with EU RoHS Directive 2011/65/EU and related halogen restrictions.
LT1004ID-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.8%
- Temperature Coefficient:
- 20ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 120µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 20 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LT1004ID-2-5 FAQ
1.How can I place an order for LT1004ID-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004ID-2-5 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 LT1004ID-2-5 reliable?
The price and inventory of LT1004ID-2-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1004ID-2-5 is usually 5 days.
3.What payment methods are accepted for LT1004ID-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004ID-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004ID-2-5?
LT1004ID-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004ID-2-5 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 LT1004ID-2-5?
For technical support, including LT1004ID-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004ID-2-5 requirements.
6.How does Aetrix verify that LT1004ID-2-5 is sourced from the original manufacturer or authorized distributors?
All LT1004ID-2-5 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 LT1004ID-2-5 meets industry standards.
7.What is the process for return or replacement of LT1004ID-2-5?
All LT1004ID-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004ID-2-5, 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 LT1004ID-2-5 part is unused and in its original packaging.
Return procedure for LT1004ID-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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