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Texas Instruments LT1004MLP-1-2
- Part No.:
- LT1004MLP-1-2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LT1004MLP-1-2.pdf
- Description:
- VOLTAGE REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:3,913
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Product details
Overview
LT1004MLP-1-2 from Texas Instruments is a micropower two-terminal band-gap voltage reference IC delivering 1.235 V nominal output with ±4 mV initial accuracy, 20 ppm/°C temperature coefficient, and 0.6 Ω reference impedance at 100 µA. It operates from 8 µA to 20 mA supply current and supports battery-operated instrumentation requiring stable low-power biasing.
For engineers reviewing the LT1004MLP-1-2 datasheet, LT1004MLP-1-2 pinout, LT1004MLP-1-2 application, or LT1004MLP-1-2 equivalent, key selection criteria include micropower operation down to 8 µA, low thermal drift in portable test equipment, compatibility with LM285/LM385 footprints, and suitability for cold-junction compensation circuits.
Technical Context
The LT1004MLP-1-2 implements a precision band-gap core with on-chip trimming to achieve ±4 mV initial tolerance and 20 ppm/°C average TC over −40°C to 85°C. Its two-terminal architecture eliminates external bias components, enabling direct replacement of Zener diodes in low-current references.
Designed for ultra-low quiescent current, it maintains regulation from IZ = 8 µA to 20 mA while holding reference impedance below 1.5 Ω across temperature. The device uses internal curvature correction to minimize voltage drift versus temperature without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Output Voltage | 1.235 V at 100 µA - stable reference point for ADCs, DACs, and sensor signal conditioning |
| Initial Accuracy | ±4 mV - enables 12-bit system accuracy without calibration in portable meters |
| Temp Coefficient | 20 ppm/°C - ensures ≤0.25 mV drift over −40°C to 85°C ambient range |
| Reference Impedance | 0.6 Ω at 100 µA - minimizes load-induced error in high-gain op-amp feedback networks |
| Min Operating Current | 8 µA - supports operation from coin cells or energy-harvesting sources |
| Max Operating Current | 20 mA - accommodates transient loads without dropout in current-loop transmitters |
| Noise (10 Hz–10 kHz) | 60–120 µV - low enough for precision 16-bit data acquisition front-ends |
Pinout & Package
LT1004MLP-1-2 is supplied in an 8-pin SOIC (D) package with 1.27 mm lead pitch and 1.75 mm max height. Pin 1 is Anode; pins 2–5 and 7 are NC; pins 6 and 8 are internally connected CATHODE terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Positive reference terminal | Connects to regulated output node; supplies current into load when used as shunt reference |
| Cathode (Pins 6 & 8) | Reference ground return | Internally tied; must be connected to system ground or negative rail for proper regulation |
| NC (Pins 2–5, 7) | No internal connection | Unbonded; may be left floating or grounded per PCB layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| Two-terminal operation | Eliminates need for external bias resistor or current source in shunt reference configurations |
| LM285/LM385 pin-compatible | Direct drop-in replacement with improved accuracy and lower tempco |
| Micropower startup | Regulates stably from 8 µA - enables use in always-on battery monitoring circuits |
| Low long-term drift | 20 ppm/khr - reduces recalibration frequency in field-deployed test instruments |
| Low-noise output | 60 µV broadband noise - preserves SNR in precision analog front-ends |
Applications
| Portable Meter Reference | Portable Test Instruments |
|---|---|
Use Scenario: Handheld multimeter requiring stable 1.2-V reference for 3½-digit ADC scaling. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing excitation for ratiometric measurement circuitry. Use Value: ±4 mV initial accuracy and 20 ppm/°C TC enable factory calibration validity over full operating temperature range without trim pots. |
Use Scenario: Battery-powered oscilloscope probe calibration module needing low-drift bias. IC Role / Device Role / Timing Role: Precision DC reference for offset nulling and gain-setting amplifiers. Use Value: 0.6 Ω reference impedance prevents loading errors in high-impedance op-amp feedback paths. |
| Battery-Operated Systems | Current-Loop Instrumentation |
Use Scenario: Wireless sensor node powered by CR2032 coin cell requiring <10 µA quiescent current. IC Role / Device Role / Timing Role: Micropower reference for microcontroller ADC and analog comparator thresholds. Use Value: Stable regulation down to 8 µA enables >5-year battery life while maintaining 12-bit measurement linearity. |
Use Scenario: 4–20 mA transmitter with loop-powered design where reference must operate from <4 mA loop current. IC Role / Device Role / Timing Role: Shunt reference establishing precise 1.235-V threshold for current-sense amplifier feedback. Use Value: 20 mA max operating current allows headroom for sensor excitation and signal conditioning within loop budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM385B-1.2 | ±1% initial accuracy (12 mV), 100 ppm/°C TC, 10 µA min current | Higher drift limits use in wide-temperature industrial sensors | Select LT1004MLP-1-2 when <±5 mV accuracy and <30 ppm/°C TC are required |
| REF191 | Three-terminal SOT-23, 1.25 V output, ±0.2% accuracy, 50 ppm/°C TC | Requires external bias resistor; not pin-compatible with two-terminal layout | Choose REF191 only if board redesign permits three-terminal topology and tighter absolute accuracy is needed |
Compared with LM385B-1.2 and REF191, the LT1004MLP-1-2 delivers superior thermal stability and micropower capability in a drop-in SOIC footprint, making it optimal for space-constrained, battery-sensitive designs where two-terminal simplicity is critical.
Availability
LT1004MLP-1-2 is available at Aetrix Electronics and suitable for portable meter reference, portable test instruments, and battery-operated systems requiring stable component supply with guaranteed long-term availability.
Supply support for LT1004MLP-1-2 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 family was designed specifically for micropower, low-drift voltage referencing in portable and battery-critical applications-emphasizing accuracy, thermal stability, and minimal quiescent current without external components.
FAQ
What is the operating temperature range for LT1004MLP-1-2?
The LT1004MLP-1-2 is rated for operation from −40°C to +85°C. This extended industrial temperature range is confirmed in the TI SLVS022M datasheet under "recommended operating conditions" for the LT1004I grade, which matches the 'M' suffix designation indicating military/industrial qualification. The device maintains ±4 mV initial accuracy and 20 ppm/°C temperature coefficient across this full range.
Is LT1004MLP-1-2 pin-compatible with LM285 or LM385 series devices?
Yes, LT1004MLP-1-2 is explicitly specified as a pin-for-pin replacement for the LM285 and LM385 series voltage references. Its SOIC-8 package uses identical pin 1 (Anode) and dual cathode (pins 6 & 8) configuration, with all other pins designated NC. No PCB changes are required when upgrading from LM285-1.2 or LM385-1.2 to LT1004MLP-1-2.
What is the minimum cathode current required for LT1004MLP-1-2 to regulate properly?
The LT1004MLP-1-2 requires a minimum cathode current (IZ(min)) of 8 µA to maintain regulation, as specified in the "electrical characteristics" table of the SLVS022M datasheet. Below this threshold, output voltage deviates from nominal 1.235 V; operation above 8 µA ensures stable reference performance across temperature and load conditions.
Can LT1004MLP-1-2 be used in a series (three-terminal) reference configuration?
No - LT1004MLP-1-2 is strictly a two-terminal shunt reference. It has no separate input, output, or ground pins. It functions only in parallel with the load, sinking current through its cathode to establish a fixed voltage between anode and cathode. For series reference topologies, discrete regulators or three-terminal references like REF191 must be used instead.
Does LT1004MLP-1-2 require external capacitors for stability?
No external capacitor is required for basic regulation stability. The LT1004MLP-1-2 is internally compensated and remains stable with purely resistive loads. However, a 100 pF capacitor is recommended across the reference terminals in noise-sensitive applications (e.g., Figure 16 in SLVS022M) to reduce high-frequency noise coupling without affecting DC accuracy.
LT1004MLP-1-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.235V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.32%
- Temperature Coefficient:
- 20ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 60µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 10 µA
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LT1004MLP-1-2 FAQ
1.How can I place an order for LT1004MLP-1-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004MLP-1-2 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 LT1004MLP-1-2 reliable?
The price and inventory of LT1004MLP-1-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1004MLP-1-2 is usually 5 days.
3.What payment methods are accepted for LT1004MLP-1-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004MLP-1-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004MLP-1-2?
LT1004MLP-1-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004MLP-1-2 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 LT1004MLP-1-2?
For technical support, including LT1004MLP-1-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004MLP-1-2 requirements.
6.How does Aetrix verify that LT1004MLP-1-2 is sourced from the original manufacturer or authorized distributors?
All LT1004MLP-1-2 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 LT1004MLP-1-2 meets industry standards.
7.What is the process for return or replacement of LT1004MLP-1-2?
All LT1004MLP-1-2 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004MLP-1-2, 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 LT1004MLP-1-2 part is unused and in its original packaging.
Return procedure for LT1004MLP-1-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1004MLP-1-2 Tags
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