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Texas Instruments LT1004IPW-2-5
- Part No.:
- LT1004IPW-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LT1004IPW-2-5.pdf
- Description:
- IC VREF SHUNT 0.8% 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:302
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Product details
Overview
LT1004IPW-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-designed for precision low-power systems including portable test instruments and battery-operated current-loop transmitters.
For engineers reviewing the LT1004IPW-2-5 datasheet, LT1004IPW-2-5 pinout, LT1004IPW-2-5 application, or LT1004IPW-2-5 equivalent, key selection criteria include its −40°C to +85°C industrial temperature range, TSSOP-8 package, 8 µA minimum operating current, 20 mA max reverse current capability, and compatibility with legacy LM285/LM385 designs requiring improved stability and lower power.
Technical Context
The LT1004IPW-2-5 implements a monolithic band-gap reference architecture optimized for micropower operation, achieving stable 2.5 V output across wide current (8–20 mA) and temperature (−40°C to +85°C) ranges without external trimming. Its internal circuitry includes precision biasing, curvature compensation, and low-noise transistor design to minimize thermal drift and long-term drift.
It operates as a two-terminal shunt reference: cathode connects to system ground or regulated rail, anode sinks current to maintain precise voltage across external load/resistor. Terminal configuration enables simple integration into current-source, voltage-regulator, and sensor-biasing topologies with minimal component count.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V nominal, ±20 mV initial accuracy at 100 µA - ensures absolute voltage tolerance within 0.8% over production lot without calibration. |
| Temp Coefficient | 20 ppm/°C average - limits voltage drift to ≤±1.7 mV over full −40°C to +85°C range, critical for unheated portable instrumentation. |
| Ref Impedance | 0.2 Ω typical at 100 µA - maintains <1 mV load regulation error even with 5 mA load current variation. |
| Min Operating Current | 8 µA - enables operation from microamp-level bias sources, supporting ultra-low-power wake-up circuits and energy-harvesting systems. |
| Max Reverse Current | 20 mA - allows direct use in series-pass regulator feedback paths and high-current shunt references without external limiting. |
| Noise Voltage | 60–120 µV broadband (10 Hz–10 kHz) - suitable for 12-bit ADC references where noise floor must remain below 1 LSB at 2.5 V full scale. |
| Long-Term Drift | 20 ppm/khr - predicts <0.2% output change over 10 years of continuous operation, supporting 15+ year industrial field deployments. |
Pinout & Package
TSSOP-8 package (PW), 3.0 mm × 4.4 mm × 1.2 mm body height, lead-free NiPdAu finish, JEDEC MO-153 compliant. Pin 1 marked by beveled corner; pins 6 and 8 internally connected to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 4) | Current sink terminal | Sinks reference current from external supply; voltage at cathode is regulated to 2.5 V relative to this node. |
| Cathode (Pins 5 & 7) | Reference output node | Provides stable 2.5 V output; pins 5 and 7 are internally shorted and must both connect to load/reference point. |
| Pins 1, 2, 3, 6, 8 | No internal connection | Unused terminals; electrically isolated and may be left floating or tied to ground for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | Operates down to 8 µA - enables direct use in battery-powered devices with multi-year shelf life, such as handheld multimeters and wireless sensor nodes. |
| Pin-for-pin replacement | Direct drop-in for LM285-2.5 and LM385-2.5 - eliminates PCB redesign when upgrading accuracy, tempco, or long-term stability in existing products. |
| Low reference impedance | 0.2 Ω typical - minimizes interaction with load capacitance and reduces sensitivity to PCB trace resistance, improving transient response in closed-loop regulators. |
| Industrial temperature range | −40°C to +85°C specified performance - guarantees 2.5 V output stability across automotive under-hood, factory automation, and outdoor metering environments. |
| Low broadband noise | 60 µV RMS (10 Hz–10 kHz) - supports high-resolution analog signal chains without requiring external filtering, reducing BOM cost and board area. |
Applications
| Portable Test Instruments | Battery-Operated Systems |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 2.5 V reference for 16-bit ADC conversion across varying battery voltage (6–9 V) and ambient temperature (0–50°C). IC Role / Device Role / Timing Role: Two-terminal shunt reference providing precision voltage node for ADC reference input and analog front-end biasing. Use Value: Enables ±0.05% measurement accuracy over full operating range without calibration, extending calibration interval to 2 years. | Use Scenario: Wireless pressure transmitter powered by single 3.6 V lithium-thionyl chloride cell, operating for 10+ years in remote oil-field monitoring. IC Role / Device Role / Timing Role: Micropower voltage reference for sensor excitation and ADC reference in ultra-low-duty-cycle sleep/wake architecture. Use Value: Draws only 8 µA quiescent current, contributing <0.02% to total system standby power, preserving battery capacity for >100,000 measurements. |
| Current-Loop Instrumentation | Portable Meter Reference |
Use Scenario: 4–20 mA loop-powered temperature transmitter with HART communication, requiring stable 2.5 V reference for DAC and signal conditioning. IC Role / Device Role / Timing Role: Shunt reference establishing precision voltage across sense resistor to generate accurate loop current. Use Value: 20 ppm/°C tempco ensures <±0.1% current error over −25°C to +70°C ambient, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Portable clamp-on ammeter using Hall-effect sensor with integrated signal chain requiring low-drift reference for offset nulling and gain calibration. IC Role / Device Role / Timing Role: Primary voltage reference for auto-zero amplifier and programmable gain stage calibration memory. Use Value: 20 ppm/khr long-term drift prevents recalibration for ≥5 years, reducing maintenance cost and field downtime. |
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, 50 ppm/°C tempco, SOIC-8 only, no TSSOP option | Lower accuracy and higher drift limit use in non-critical consumer-grade meters | Select when cost is primary constraint and ±1% system accuracy suffices |
| REF3025AIDBZR | ±12 mV initial accuracy, 50 ppm/°C tempco, 50 µA min current, SOT-23-3 | Higher quiescent current and different pinout prevent direct replacement; requires layout change | Select when tighter initial accuracy is required but TSSOP-8 footprint is not mandatory |
Compared with LM385BIMX-2.5 and REF3025AIDBZR, the LT1004IPW-2-5 delivers superior temperature stability and micropower operation in a space-constrained TSSOP-8 package-making it optimal for industrial portable equipment where long-term accuracy and battery life are co-prioritized.
Availability
LT1004IPW-2-5 is available at Aetrix Electronics and suitable for portable test instruments, battery-operated systems, and current-loop instrumentation requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LT1004IPW-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 series was designed specifically for micropower, high-stability voltage referencing in portable and battery-constrained applications-emphasizing low drift, minimal operating current, and seamless upgrade paths from legacy references like the LM285.
FAQ
What is the operating temperature range for the LT1004IPW-2-5?
The LT1004IPW-2-5 is characterized for operation from −40°C to +85°C. This industrial temperature range is explicitly defined in the datasheet's "recommended operating conditions" table and verified across all electrical parameters-including reference voltage, temperature coefficient, and long-term drift-ensuring full specification compliance across the entire range.
Is the LT1004IPW-2-5 pin-compatible with the LM285-2.5?
Yes, the LT1004IPW-2-5 is a documented pin-for-pin replacement for the LM285-2.5 and LM385-2.5 series. The datasheet states this explicitly in the "description/ordering information" section, confirming identical TSSOP-8 pinout, terminal function (anode/cathode), and no-connection pin assignments-enabling drop-in upgrades without layout changes.
What is the minimum cathode-to-anode current required for regulation in the LT1004IPW-2-5?
The LT1004IPW-2-5 requires a minimum reference current of 8 µA to maintain regulation, as specified in the "electrical characteristics" table under IZ(min). This value is guaranteed over the full −40°C to +85°C temperature range and applies to both LT1004-2.5 variants, including the LT1004IPW-2-5.
Does the LT1004IPW-2-5 require external capacitors for stability?
No, the LT1004IPW-2-5 is internally compensated and does not require external capacitors for basic shunt reference operation. The datasheet shows stable transient response in Figures 8 and 15 without added capacitance, though a 100 pF capacitor may be used across cathode-anode in high-noise environments to reduce RF susceptibility-per Figure 18 application circuit.
How does the LT1004IPW-2-5 achieve its 20 ppm/°C temperature coefficient?
The LT1004IPW-2-5 achieves its 20 ppm/°C average temperature coefficient through monolithic band-gap core design with curvature compensation, precision resistor matching, and proprietary process trimming. This is measured as total voltage change divided by temperature range (−40°C to +85°C) at 100 µA, and is guaranteed in the "electrical characteristics" table-not derived from extrapolation or typical-only data.
LT1004IPW-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
LT1004IPW-2-5 FAQ
1.How can I place an order for LT1004IPW-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004IPW-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 LT1004IPW-2-5 reliable?
The price and inventory of LT1004IPW-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 LT1004IPW-2-5 is usually 5 days.
3.What payment methods are accepted for LT1004IPW-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004IPW-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004IPW-2-5?
LT1004IPW-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004IPW-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 LT1004IPW-2-5?
For technical support, including LT1004IPW-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004IPW-2-5 requirements.
6.How does Aetrix verify that LT1004IPW-2-5 is sourced from the original manufacturer or authorized distributors?
All LT1004IPW-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 LT1004IPW-2-5 meets industry standards.
7.What is the process for return or replacement of LT1004IPW-2-5?
All LT1004IPW-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004IPW-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 LT1004IPW-2-5 part is unused and in its original packaging.
Return procedure for LT1004IPW-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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