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Texas Instruments LT1004IPWR-2-5
- Part No.:
- LT1004IPWR-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LT1004IPWR-2-5.pdf
- Description:
- IC VREF SHUNT 0.8% 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,941
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Product details
Overview
LT1004IPWR-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 0.2–0.6 Ω reference impedance at 100 µA. It operates from 8 µA to 20 mA and supports battery-operated instrumentation requiring stable low-power biasing.
For engineers reviewing the LT1004IPWR-2-5 datasheet, LT1004IPWR-2-5 pinout, LT1004IPWR-2-5 application, or LT1004IPWR-2-5 equivalent, this page provides verified specifications, TSSOP-8 terminal mapping, real-world use cases in current-loop transmitters and portable test gear, and validated alternative parts for design continuity.
Technical Context
The LT1004IPWR-2-5 implements a precision band-gap core with internal trimming to achieve tight initial tolerance and low thermal drift. Its two-terminal architecture eliminates external resistors, enabling direct replacement of LM385-2.5 in existing designs while improving accuracy and long-term stability.
Designed for industrial-grade operation (−40°C to +85°C), it features ultra-low quiescent current (8–12 µA minimum), sub-1 mV load regulation error over 1–20 mA, and broadband noise of 60–120 µV RMS (10 Hz–10 kHz). Its low reference impedance ensures minimal output perturbation under dynamic load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V nominal; ±20 mV initial accuracy ensures ≤0.8% absolute error at 25°C without trimming |
| Temp Coefficient | 20 ppm/°C average; maintains ≤±0.5 mV drift across −40°C to +85°C operating range |
| Min Operating Current | 8–12 µA; enables operation from microamp-level bias sources like leakage-limited circuits |
| Reference Impedance | 0.2–0.6 Ω at 100 µA; delivers <1 mV output shift per 1 mA load change |
| Noise (10 Hz–10 kHz) | 60–120 µV RMS; supports high-resolution ADC references without external filtering |
| Operating Temp Range | −40°C to +85°C; qualified for industrial embedded systems and field-deployed instrumentation |
Pinout & Package
TSSOP-8 package (PW drawing), 3.0 mm × 4.4 mm footprint, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Current input node; connects to supply rail or current source for reverse-biased operation |
| Pin 2 | Cathode | Reference output node; provides stable 2.5 V when biased with ≥8 µA sink current |
| Pins 3, 4, 6, 7, 8 | No internal connection | Unused terminals; must remain unconnected or grounded per layout guidelines |
| Pin 5 | Cathode | Redundant output terminal; internally tied to Pin 2 for improved current handling and thermal symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Two-terminal architecture | Eliminates external resistor network; simplifies PCB layout and reduces BOM count vs three-terminal references |
| PIN-compatible upgrade | Direct drop-in replacement for LM385-2.5 with tighter specs-no schematic or layout changes required |
| Micropower operation | Functional down to 8 µA; enables multi-year battery life in portable meters and sensor nodes |
| Low-output impedance | Sub-1 Ω impedance minimizes load-induced voltage droop in precision DAC buffers and op-amp feedback paths |
| Industrial temperature grade | −40°C to +85°C qualification supports deployment in automotive cabin modules and factory-floor controllers |
Applications
| Portable Test Instrument Reference | Battery-Operated Data Logger |
|---|---|
Use Scenario: Handheld multimeter requiring stable 2.5 V reference for 16-bit ADC conversion across varying battery voltage (3.0–4.2 V). IC Role / Device Role / Timing Role: Two-terminal voltage reference providing ratiometric accuracy independent of supply rail fluctuations. Use Value: ±20 mV initial tolerance and 20 ppm/°C drift ensure <0.1% measurement error over full temperature and battery discharge range. | Use Scenario: Remote environmental sensor node powered by CR2032 coin cell, logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Micropower reference supplying bias to analog front-end and ADC, drawing only 10 µA quiescent current. Use Value: 8–12 µA minimum operating current extends battery life beyond 5 years while maintaining 2.5 V reference stability. |
| 4–20 mA Current Loop Transmitter | Low-Voltage Precision DAC Reference |
Use Scenario: Industrial transmitter converting 0–10 V sensor signal to 4–20 mA loop output using op-amp-based I/V conversion. IC Role / Device Role / Timing Role: Stable 2.5 V reference setting loop zero point and scaling factor in feedback path. Use Value: 0.2–0.6 Ω reference impedance prevents gain error drift during loop current transients up to 20 mA. | Use Scenario: Medical-grade infusion pump controller using 12-bit DAC to set motor drive voltage with <1 LSB linearity requirement. IC Role / Device Role / Timing Role: Low-noise (60–120 µV RMS), low-drift reference for DAC VREF input. Use Value: Sub-100 µV broadband noise avoids quantization uncertainty; 20 ppm/°C drift limits full-scale error to <0.025% over operating temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM385BIMX-2.5 | ±30 mV initial accuracy, 100 ppm/°C tempco, 10 µA min current, SOIC-8 only | Higher drift and looser initial tolerance limit use in high-accuracy portable instruments | Select when cost sensitivity outweighs precision requirements and SOIC-8 is preferred over TSSOP-8 |
| REF3025AIDBVR | ±2 mV initial accuracy, 50 ppm/°C tempco, 50 µA min current, 1.2 V dropout at 25 mA | Three-terminal architecture requires external resistor; higher quiescent current precludes ultra-low-power use | Choose for highest initial accuracy where board space allows extra components and power budget permits >50 µA |
Compared with LM385BIMX-2.5, LT1004IPWR-2-5 offers tighter initial tolerance and lower thermal drift; compared with REF3025AIDBVR, it achieves micropower operation and two-terminal simplicity at the expense of absolute accuracy-making it optimal for space-constrained, battery-critical systems.
Availability
LT1004IPWR-2-5 is available at Aetrix Electronics and suitable for portable test instruments, battery-operated data loggers, and 4–20 mA current-loop transmitters requiring stable component supply with guaranteed long-term sourcing.
Supply support for LT1004IPWR-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 industrial-grade components.
The LT1004 family was designed specifically for micropower, high-stability voltage referencing in portable and battery-constrained systems-emphasizing low operating current, tight initial accuracy, and robust temperature performance without external trimming.
FAQ
What is the minimum operating current for LT1004IPWR-2-5?
The LT1004IPWR-2-5 requires a minimum reference current of 8–12 µA across its full operating temperature range (−40°C to +85°C). This ultra-low threshold enables reliable startup and regulation from weak bias sources such as high-value resistors or leakage-limited circuits, making LT1004IPWR-2-5 ideal for energy-harvesting and multi-year battery applications.
Is LT1004IPWR-2-5 pin-compatible with LM385-2.5?
Yes, LT1004IPWR-2-5 is explicitly specified as a pin-for-pin replacement for the LM385 series, including LM385-2.5. Both devices use identical TSSOP-8 pinouts with Anode on Pin 1 and Cathode on Pins 2 and 5. No PCB modifications are needed-only the improved electrical specs (tighter initial accuracy, lower tempco, reduced impedance) require verification in the target circuit.
What is the reference impedance of LT1004IPWR-2-5 at 100 µA?
At 100 µA reference current and 25°C, the LT1004IPWR-2-5 exhibits a reference impedance of 0.2–0.6 Ω. Over the full temperature range (−40°C to +85°C), this increases to ≤1.5 Ω. This low impedance ensures minimal output voltage shift (<1 mV) under load current steps, critical for precision ADC references and op-amp feedback networks.
Can LT1004IPWR-2-5 be used in a 1.5 V battery-powered system?
Yes-LT1004IPWR-2-5 can operate from a 1.5 V battery when configured as a shunt reference with appropriate current limiting. Figure 26 in the datasheet demonstrates a working 1.2 V reference derived from a 1.5 V alkaline cell using LT1004-1.2; similarly, LT1004IPWR-2-5 functions reliably down to ~1.8 V forward voltage with proper external resistor selection to maintain ≥8 µA bias current.
What is the long-term stability of LT1004IPWR-2-5?
The LT1004IPWR-2-5 exhibits a long-term output voltage drift of 20 ppm/khr (≈0.175% per year) when operated continuously at 25°C with 100 µA bias current. This value is measured under controlled conditions and reflects typical aging behavior; actual field performance may vary based on thermal cycling, voltage stress, and packaging integrity over time.
LT1004IPWR-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-TSSOP
LT1004IPWR-2-5 FAQ
1.How can I place an order for LT1004IPWR-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004IPWR-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 LT1004IPWR-2-5 reliable?
The price and inventory of LT1004IPWR-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 LT1004IPWR-2-5 is usually 5 days.
3.What payment methods are accepted for LT1004IPWR-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004IPWR-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004IPWR-2-5?
LT1004IPWR-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004IPWR-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 LT1004IPWR-2-5?
For technical support, including LT1004IPWR-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004IPWR-2-5 requirements.
6.How does Aetrix verify that LT1004IPWR-2-5 is sourced from the original manufacturer or authorized distributors?
All LT1004IPWR-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 LT1004IPWR-2-5 meets industry standards.
7.What is the process for return or replacement of LT1004IPWR-2-5?
All LT1004IPWR-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004IPWR-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 LT1004IPWR-2-5 part is unused and in its original packaging.
Return procedure for LT1004IPWR-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1004IPWR-2-5 Tags
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