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Texas Instruments LT1004CPWR-2-5
- Part No.:
- LT1004CPWR-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LT1004CPWR-2-5.pdf
- Description:
- IC VREF SHUNT 0.8% 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,712
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Product details
Overview
LT1004CPWR-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 serves as a precision reference in battery-powered instrumentation and current-loop transmitters.
For engineers reviewing the LT1004CPWR-2-5 datasheet, LT1004CPWR-2-5 pinout, LT1004CPWR-2-5 application, or LT1004CPWR-2-5 equivalent, key selection criteria include low quiescent current (≤10 µA), stable 2.5 V output over 0°C–70°C, TSSOP-8 package compatibility, and direct replacement capability for LM385-2.5 in space-constrained designs.
Technical Context
The LT1004CPWR-2-5 implements a band-gap reference architecture with internal trimming to achieve tight initial voltage tolerance and low thermal drift. Its two-terminal configuration simplifies PCB layout by eliminating separate supply and ground pins, while the internal circuitry maintains regulation across a wide reverse current range (8 µA to 20 mA).
Designed for ultra-low-power operation, it delivers 2.5 V reference voltage with 60 µV broadband noise (10 Hz–10 kHz) and exhibits <20 mV total voltage change over full operating current (1 mA to 20 mA) and temperature (0°C to 70°C). The device supports both reverse-biased (zener-mode) and forward-biased operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V nominal; ±20 mV initial accuracy ensures ≤0.8% error at 25°C without trimming |
| Temp Coefficient | 20 ppm/°C max; guarantees ≤±0.5 mV drift over 0°C–70°C ambient range |
| Ref Impedance | 0.2 Ω typ at 100 µA; enables fast settling and minimal load-induced voltage shift |
| Operating Current | 8 µA min to 20 mA max; supports micropower systems down to single-digit µA quiescent draw |
| Noise (10 Hz–10 kHz) | 60 µV rms; low enough for 12-bit ADC reference without external filtering |
| Package | TSSOP-8; 3.0 mm × 4.4 mm footprint with 0.65 mm pitch, suitable for high-density layouts |
Pinout & Package
TSSOP-8 package (PW drawing), 3.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height. Pin 1 marked via beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference output terminal (cathode-connected in zener mode) | Connects to load or feedback node; voltage referenced to cathode |
| Cathode | Reference return terminal (anode-connected in forward mode) | Serves as system ground reference point in standard reverse-bias configuration |
| NC (Pins 3,4,6,7) | No internal connection | Must remain unconnected; no routing or pull-up/pull-down required |
Key Features
| Feature | Design Value |
|---|---|
| Two-terminal topology | Eliminates dedicated VCC/GND pins-reduces BOM count and board area vs. three-terminal references |
| Micropower operation | Functional down to 8 µA; enables multi-year battery life in portable meters and sensor nodes |
| Low reference impedance | 0.2 Ω typical at 100 µA; minimizes voltage droop under dynamic load steps |
| Pin-for-pin replacement | Direct drop-in for LM385-2.5 and LM285-2.5; no layout changes required |
| Stable over temperature | 20 ppm/°C TC and ≤20 mV total VZ variation from 0°C to 70°C ensures calibration retention |
Applications
| Portable Test Instruments | Battery-Operated Systems |
|---|---|
Use Scenario: Handheld multimeters requiring stable 2.5 V reference for ADC scaling and autoranging circuits. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing precise, low-drift excitation for analog front-end signal conditioning. Use Value: Enables 0.1% measurement accuracy over 0°C–50°C without periodic recalibration or trim potentiometers. | Use Scenario: Wireless sensor nodes powered by coin-cell batteries needing long-term voltage stability. IC Role / Device Role / Timing Role: Micropower reference for ADC biasing and LDO feedback networks in ultra-low-duty-cycle devices. Use Value: Draws only 10 µA typical, extending 220 mAh CR2032 battery life beyond 2 years at 1-sample-per-minute duty cycle. |
| Current-Loop Instrumentation | Portable Meter Reference |
Use Scenario: 4–20 mA transmitter modules where reference voltage sets loop current scaling. IC Role / Device Role / Timing Role: Precision 2.5 V reference driving op-amp-based current source circuitry. Use Value: 20 ppm/°C TC and <20 mV total error ensure loop accuracy remains within ±0.2% over industrial temperature range. | Use Scenario: Digital panel meters used in field service equipment with variable ambient conditions. IC Role / Device Role / Timing Role: Primary voltage reference for display driver and analog input stage calibration. Use Value: ±20 mV initial tolerance and low long-term drift (<20 ppm/khr) maintain reading fidelity across 5+ years of field use. |
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 TC, SOIC-8 only | Higher drift and looser tolerance limit use in high-accuracy portable instruments | Select when cost sensitivity outweighs precision requirements and SOIC-8 is preferred |
| REF3025AIDBZR | ±12 mV initial accuracy, 50 ppm/°C TC, 50 µA quiescent current, SOT23-3 | Three-terminal design requires additional decoupling; higher IQ reduces battery life | Choose for tighter initial tolerance where board space allows SOT23-3 and power budget permits 50 µA |
Compared with LM385BIMX-2.5 and REF3025AIDBZR, the LT1004CPWR-2-5 offers superior temperature stability and lower operating current in a compact TSSOP-8, making it optimal for space- and power-constrained 2.5 V reference applications demanding long-term calibration integrity.
Availability
LT1004CPWR-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 consistent parametric performance across production lots.
Supply support for LT1004CPWR-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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision analog ICs.
The LT1004 family was designed specifically for micropower, two-terminal voltage reference applications in portable and battery-critical systems-emphasizing low IQ, high accuracy, and robust thermal performance without external components.
FAQ
What is the operating temperature range for the LT1004CPWR-2-5?
The LT1004CPWR-2-5 is characterized for operation from 0°C to 70°C. This commercial-grade temperature range is explicitly defined in the ordering information table and electrical characteristics section of the TI datasheet SLVS022M. The "C" suffix in the part number denotes this grade, distinguishing it from the industrial-grade "I" variant rated for −40°C to 85°C. Operation outside 0°C–70°C may result in unguaranteed performance.
Can the LT1004CPWR-2-5 replace the LM385-2.5 directly on a PCB?
Yes, the LT1004CPWR-2-5 is specified by Texas Instruments as a pin-for-pin replacement for the LM385 and LM285 series, including LM385-2.5. Both devices use identical TSSOP-8 pinouts with Anode and Cathode on the same positions (Pin 1 and Pin 8 respectively), and NC pins match. No PCB modifications are needed, and the LT1004CPWR-2-5 provides improved specifications including tighter initial accuracy and lower temperature coefficient.
What is the minimum operating current for the LT1004CPWR-2-5?
The LT1004CPWR-2-5 has a minimum reference current (IZ(min)) of 8 µA over its full operating temperature range (0°C to 70°C). This value is specified in the Electrical Characteristics table of the datasheet. Below 8 µA, regulation is not guaranteed, and output voltage may deviate significantly from 2.5 V. For reliable startup and stability, design target currents ≥10 µA.
Does the LT1004CPWR-2-5 require external capacitors for stability?
No, the LT1004CPWR-2-5 does not require external capacitors for basic DC stability. Its two-terminal band-gap architecture is inherently stable with resistive loads. However, a 100 pF capacitor is recommended across the anode–cathode terminals in noise-sensitive applications (e.g., high-resolution ADC references) to reduce broadband noise, as shown in Figure 19 of the datasheet. Larger capacitors may cause instability during transient load steps.
How does the reference impedance of the LT1004CPWR-2-5 affect load regulation?
The LT1004CPWR-2-5 has a typical reference impedance (ZZ) of 0.2 Ω at 100 µA, rising to 1.5 Ω over full temperature range. This low impedance means that a 1 mA load current change induces only ~0.2 mV output shift (ΔV = I × ZZ). As confirmed in the datasheet's "Change in reference voltage with current" spec (≤10 mV from 1 mA to 20 mA), this ensures excellent load regulation in precision analog circuits without active buffering.
LT1004CPWR-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
LT1004CPWR-2-5 FAQ
1.How can I place an order for LT1004CPWR-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004CPWR-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 LT1004CPWR-2-5 reliable?
The price and inventory of LT1004CPWR-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 LT1004CPWR-2-5 is usually 5 days.
3.What payment methods are accepted for LT1004CPWR-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004CPWR-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004CPWR-2-5?
LT1004CPWR-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004CPWR-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 LT1004CPWR-2-5?
For technical support, including LT1004CPWR-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004CPWR-2-5 requirements.
6.How does Aetrix verify that LT1004CPWR-2-5 is sourced from the original manufacturer or authorized distributors?
All LT1004CPWR-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 LT1004CPWR-2-5 meets industry standards.
7.What is the process for return or replacement of LT1004CPWR-2-5?
All LT1004CPWR-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004CPWR-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 LT1004CPWR-2-5 part is unused and in its original packaging.
Return procedure for LT1004CPWR-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1004CPWR-2-5 Tags
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