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Texas Instruments LT1004CDR-2-5
- Part No.:
- LT1004CDR-2-5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1004CDR-2-5.pdf
- Description:
- IC VREF SHUNT 0.8% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,627
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Product details
Overview
LT1004CDR-2-5 from Texas Instruments is a two-terminal micropower band-gap voltage reference IC providing 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 low-power reference in portable instrumentation and battery-operated systems.
For engineers reviewing the LT1004CDR-2-5 datasheet, LT1004CDR-2-5 pinout, LT1004CDR-2-5 application, or LT1004CDR-2-5 equivalent, key selection criteria include its SOIC-8 package, C-grade (0°C to 70°C) temperature range, micropower operation down to 8 µA, low noise (60–120 µV broadband), and compatibility with current-loop and thermocouple compensation circuits.
Technical Context
The LT1004CDR-2-5 implements a band-gap reference architecture with internal trimming for high initial accuracy and stable temperature performance. Its two-terminal configuration simplifies integration into series-shunt regulator topologies and ground-referenced current sources.
It features very low dynamic impedance (≤0.6 Ω over full temperature range) and exhibits minimal voltage shift (<20 mV) across 1 mA to 20 mA operating current, enabling stable biasing in low-noise amplifier stages and precision ADC references where supply headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.5 V nominal; ±20 mV initial tolerance ensures ≤0.8% absolute error at 25°C without trimming. |
| Tempco | 20 ppm/°C average; guarantees ≤±0.5 mV drift over 0°C to 70°C ambient range. |
| Min Operating Current | 8 µA; enables use in ultra-low-power applications such as lithium coin-cell–powered sensors. |
| Ref Impedance | 0.2 Ω typical at 100 µA; supports fast transient response and low-output-noise regulation. |
| Broadband Noise | 60–120 µV RMS (10 Hz–10 kHz); suitable for 12-bit to 14-bit data acquisition systems. |
| Long-Term Drift | 20 ppm/khr; provides predictable aging behavior for multi-year deployed instrumentation. |
Pinout & Package
LT1004CDR-2-5 is housed in an 8-pin SOIC (D) package with two active terminals (Anode and Cathode) and six no-connect (NC) pins. Terminals 6 and 8 are internally connected to Cathode; Pin 4 is Anode; Pin 5 is Cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 4 | Anode | Current entry point; connects to regulated supply rail or current-setting resistor in shunt configuration. |
| Pins 5, 6, 8 | Cathode | Reference output node; must be tied to system ground or virtual ground for stable 2.5 V reference generation. |
| Pins 1, 2, 3, 7 | No internal connection | Unused; may be left floating or grounded per layout best practices-no electrical impact. |
Key Features
| Feature | Design Value |
|---|---|
| Two-terminal topology | Eliminates need for external bias resistors or op-amps in basic shunt reference configurations. |
| Micropower operation | Functional down to 8 µA-an order of magnitude lower than standard band-gap references-enabling >10-year battery life in remote sensors. |
| Low reference impedance | 0.2 Ω typical at 100 µA minimizes load-induced voltage droop and improves PSRR in sensitive analog front-ends. |
| Pin-for-pin replacement | Direct drop-in substitute for LM285-2.5 and LM385-2.5 with improved accuracy and tempco. |
| Stable over wide current range | ΔVZ ≤ 20 mV from 1 mA to 20 mA enables consistent performance across varying load conditions in programmable current sources. |
Applications
| Portable Test Instruments | Battery-Operated Systems |
|---|---|
Use Scenario: Handheld multimeter requiring stable 2.5 V reference for 16-bit ADC conversion across 0°C–50°C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precise scaling for analog input channel. Use Value: ±20 mV initial accuracy and 20 ppm/°C tempco ensure <0.1% total measurement error without factory calibration. | Use Scenario: Wireless environmental sensor node powered by 3.6 V Li-SOCl₂ battery with 10-year target lifetime. IC Role / Device Role / Timing Role: Micropower reference for ultra-low-quiescent LDO and ADC bias network. Use Value: 8 µA minimum operating current enables continuous reference operation while consuming <0.1 µW-negligible vs. system sleep power budget. |
| Current-Loop Instrumentation | Thermocouple Cold-Junction Compensation |
Use Scenario: 4–20 mA transmitter module converting RTD readings into loop current with ±0.05% span accuracy. IC Role / Device Role / Timing Role: Precision 2.5 V reference for DAC output scaling and current-sense amplifier gain setting. Use Value: 0.2 Ω reference impedance prevents current-source loading errors during 20 mA loop compliance testing. | Use Scenario: Industrial temperature controller using Type K thermocouple with cold-junction compensation over −20°C to 70°C. IC Role / Device Role / Timing Role: Stable 2.5 V reference for thermistor biasing and offset correction amplifier. Use Value: Long-term drift of 20 ppm/khr ensures <0.2°C calibration drift over 5 years-meeting IEC 61511 SIL-2 requirements. |
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; 10 µA min current; SOIC-8 package. | Higher initial error and drift limit use in sub-0.2% accuracy systems; requires tighter thermal management. | Select when cost sensitivity outweighs precision needs and long-term stability is secondary. |
| REF3025AIDBZR | ±12 mV initial accuracy; 50 ppm/°C tempco; 50 µA min current; SOT-23-3 package. | Lower initial error but higher quiescent current; 3-pin configuration requires external biasing for shunt use. | Prefer for space-constrained designs needing better initial accuracy, accepting higher power and different footprint. |
Compared with LM385BIMX-2.5 and REF3025AIDBZR, the LT1004CDR-2-5 delivers superior long-term stability (20 ppm/khr vs. 50–100 ppm/khr) and lowest operating current (8 µA), making it optimal for battery-critical, high-reliability instrumentation where calibration intervals exceed 2 years.
Availability
LT1004CDR-2-5 is available at Aetrix Electronics and suitable for portable test instruments, battery-operated systems, and current-loop transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LT1004CDR-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 specializing in analog and embedded processing technologies, with leadership 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 instrumentation-emphasizing low drift, minimal operating current, and robustness across temperature extremes.
FAQ
What is the operating temperature range for the LT1004CDR-2-5?
The LT1004CDR-2-5 is characterized for operation from 0°C to 70°C (Commercial grade). This range is explicitly defined in the ordering information table and confirmed in the "recommended operating conditions" section of the datasheet. It is not rated for extended industrial or automotive temperature ranges-those require the LT1004IDR-2-5 variant.
Can the LT1004CDR-2-5 replace the LM285-2.5 directly on PCB?
Yes-the LT1004CDR-2-5 is specified as a pin-for-pin replacement for the LM285 and LM385 series. Its SOIC-8 footprint matches exactly, and the internal pin mapping (Anode on Pin 4, Cathode on Pins 5/6/8) aligns with LM285-2.5's terminal assignment. No PCB changes are required for drop-in substitution.
What is the minimum cathode current needed for stable regulation in the LT1004CDR-2-5?
The LT1004CDR-2-5 requires a minimum cathode current of 8 µA to maintain regulation within specifications. This value is listed under "IZ(min)" in the electrical characteristics table and verified across the full 0°C to 70°C temperature range. Operation below this threshold risks loss of reference accuracy and increased tempco.
How does the LT1004CDR-2-5 achieve low noise performance?
The LT1004CDR-2-5 achieves 60–120 µV RMS broadband noise (10 Hz–10 kHz) through optimized band-gap core design and internal filtering. Its low 0.2 Ω reference impedance suppresses current-to-voltage noise conversion, and the two-terminal architecture avoids op-amp–induced noise sources common in three-terminal references.
Is the LT1004CDR-2-5 RoHS compliant and lead-free?
Yes-the LT1004CDR-2-5 is RoHS compliant and lead-free. The Package Option Addendum confirms "Green (RoHS & no Sb/Br)" eco plan with "NIPDAU" lead finish and JEDEC MSL Level-1 rating. TI's official documentation states full compliance with EU RoHS Directive 2011/65/EU for all 10 restricted substances.
LT1004CDR-2-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
LT1004CDR-2-5 FAQ
1.How can I place an order for LT1004CDR-2-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004CDR-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 LT1004CDR-2-5 reliable?
The price and inventory of LT1004CDR-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 LT1004CDR-2-5 is usually 5 days.
3.What payment methods are accepted for LT1004CDR-2-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004CDR-2-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004CDR-2-5?
LT1004CDR-2-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004CDR-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 LT1004CDR-2-5?
For technical support, including LT1004CDR-2-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004CDR-2-5 requirements.
6.How does Aetrix verify that LT1004CDR-2-5 is sourced from the original manufacturer or authorized distributors?
All LT1004CDR-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 LT1004CDR-2-5 meets industry standards.
7.What is the process for return or replacement of LT1004CDR-2-5?
All LT1004CDR-2-5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004CDR-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 LT1004CDR-2-5 part is unused and in its original packaging.
Return procedure for LT1004CDR-2-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1004CDR-2-5 Tags
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