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Texas Instruments LT1004IDG4-1-2
- Part No.:
- LT1004IDG4-1-2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1004IDG4-1-2.pdf
- Description:
- IC VREF SHUNT 0.32% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
LT1004IDG4-1-2 from Texas Instruments is a micropower two-terminal band-gap voltage reference diode 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 −40°C to 85°C and supports reverse current up to 30 mA, making it suitable for precision low-power analog front-ends in portable instrumentation.
For engineers reviewing the LT1004IDG4-1-2 datasheet, LT1004IDG4-1-2 pinout, LT1004IDG4-1-2 application, or LT1004IDG4-1-2 equivalent, key selection criteria include its guaranteed 8–12 µA minimum operating current, ultra-low 60–120 µV broadband noise (10 Hz–10 kHz), and compatibility with battery-powered systems requiring stable 1.2 V references without trimming.
Technical Context
The LT1004IDG4-1-2 implements a monolithic band-gap reference architecture with internal curvature compensation, enabling stable 1.235 V output across temperature and load. Its two-terminal configuration simplifies PCB layout versus three-terminal shunt references, and its 0.6 Ω dynamic impedance ensures minimal voltage shift under varying load currents.
Designed for operation at microamp-level currents, the device achieves 20 ppm/°C average temperature coefficient over −40°C to 85°C and exhibits only 1.5 mV total reference voltage change from IZ(min) to 1 mA - critical for high-resolution ADC biasing and sensor excitation circuits where power budget and thermal drift are tightly constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 1.235 V - precise band-gap reference point for 1.2 V system calibration |
| Initial Accuracy | ±4 mV - enables direct use in 12-bit ADC reference paths without trimming |
| Temp Coefficient | 20 ppm/°C - ensures ≤1.2 mV drift over full −40°C to 85°C industrial range |
| Ref Impedance | 0.6 Ω at 100 µA - maintains <100 µV error under 100 µA load variation |
| Noise (10 Hz–10 kHz) | 60–120 µV - supports low-noise instrumentation amplifier biasing |
| Min Operating Current | 8 µA - allows operation from weak signal sources or high-impedance dividers |
| Max Reverse Current | 30 mA - accommodates transient overloads without damage |
Pinout & Package
LT1004IDG4-1-2 uses 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 per TI package drawing D0008A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 4) | Reference current sink | Connects to system ground or current-sink node; defines reference polarity |
| Cathode (Pins 5 & 8) | Reference voltage output | Provides 1.235 V output; dual-cathode design improves thermal stability |
| Pins 1, 2, 3, 6, 7 | No internal connection | Must remain unconnected; no routing or grounding required |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | Operates down to 8 µA - enables multi-year battery life in remote sensors |
| Low reference impedance | 0.6 Ω at 100 µA - minimizes load-induced error in precision current sources |
| Stable temperature performance | 20 ppm/°C TC over −40°C to 85°C - eliminates need for external compensation |
| Low broadband noise | 60–120 µV (10 Hz–10 kHz) - preserves SNR in 16-bit data acquisition systems |
| Pin-compatible upgrade | Direct replacement for LM285-1.2/LM385-1.2 - enables drop-in redesign with improved specs |
Applications
| Portable Meter Reference | Portable Test Instruments |
|---|---|
Use Scenario: Handheld digital multimeter requiring stable 1.2 V reference for ADC and display driver biasing. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing primary scaling voltage for measurement circuitry. Use Value: ±4 mV initial accuracy and 20 ppm/°C TC ensure calibrated accuracy across field temperature variations without recalibration. | Use Scenario: Battery-powered oscilloscope probe calibration module needing low-drift reference under intermittent use. IC Role / Device Role / Timing Role: Micropower reference source for offset nulling and gain-setting networks. Use Value: 8 µA minimum current enables operation from high-impedance divider networks, reducing battery drain during standby. |
| Battery-Operated Systems | Current-Loop Instrumentation |
Use Scenario: Wireless environmental sensor node powered by coin cell, requiring stable reference for analog sensor conditioning. IC Role / Device Role / Timing Role: Low-current voltage reference for op-amp biasing and ADC reference input. Use Value: 60 µV broadband noise and 0.6 Ω impedance preserve signal integrity in sub-10 µA power budgets. | Use Scenario: 4–20 mA transmitter where reference stability directly impacts loop accuracy and long-term calibration drift. IC Role / Device Role / Timing Role: Precision shunt reference for current-sense amplifier feedback and DAC output scaling. Use Value: 1.5 mV ∆VZ from IZ(min) to 1 mA ensures consistent loop gain across supply voltage variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM385BIMX-1.2 | ±1% initial accuracy (±12.4 mV), 100 ppm/°C TC, higher 5 Ω impedance | Lower accuracy limits use in >10-bit systems; requires trimming for precision apps | Select when cost sensitivity outweighs accuracy requirements and ambient temp range is limited |
| REF102CP | ±0.1% initial accuracy (±1.24 mV), 25 ppm/°C TC, 3.5 Ω impedance, 3-terminal configuration | Requires external resistor network; not pin-compatible; better accuracy but higher quiescent current | Select when tighter initial tolerance is mandatory and board space allows 3-terminal layout |
Compared with LM385BIMX-1.2 and REF102CP, the LT1004IDG4-1-2 delivers superior initial accuracy and lower impedance in a two-terminal SOIC package, enabling simpler layout and lower system power - ideal for space-constrained, battery-operated instrumentation where 12-bit linearity must be achieved without trimming.
Availability
LT1004IDG4-1-2 is available at Aetrix Electronics and suitable for portable meter reference, portable test instruments, and battery-operated systems requiring stable component supply with guaranteed −40°C to 85°C industrial temperature support.
Supply support for LT1004IDG4-1-2 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and power management solutions.
The LT1004 series was designed specifically for micropower, high-accuracy voltage reference applications in portable and industrial instrumentation - prioritizing low operating current, tight initial tolerance, and robust thermal stability without external components.
FAQ
What is the guaranteed operating temperature range for the LT1004IDG4-1-2?
The LT1004IDG4-1-2 is characterized for operation from −40°C to 85°C, matching the LT1004I grade specification. This industrial temperature range is confirmed in the ordering information table and absolute maximum ratings section of the SLVS022M datasheet, and applies to all SOIC-packaged LT1004I variants including LT1004IDG4-1-2.
Does the LT1004IDG4-1-2 require external capacitors for stability?
No, the LT1004IDG4-1-2 is internally compensated and does not require external capacitors for stability. The datasheet shows stable transient response (Figure 8) and noise performance without added capacitance. However, a 100 pF capacitor may be added at the cathode for enhanced high-frequency noise filtering in sensitive applications - this is optional, not mandatory.
How does the LT1004IDG4-1-2 compare to the LM285-1.2 in terms of pin compatibility and performance?
The LT1004IDG4-1-2 is a pin-for-pin replacement for the LM285-1.2 in SOIC packages, sharing identical pinout and terminal functions. It improves upon the LM285-1.2 with ±4 mV vs ±20 mV initial accuracy, 20 ppm/°C vs 50 ppm/°C temperature coefficient, and 0.6 Ω vs 5 Ω reference impedance - delivering measurable performance gains without PCB changes.
What is the minimum cathode current required for the LT1004IDG4-1-2 to regulate properly?
The LT1004IDG4-1-2 requires a minimum cathode current of 8 µA to maintain regulation within specifications, as specified in the electrical characteristics table under "IZ(min)" for the LT1004I grade. Operation below this current may result in increased temperature coefficient and output voltage deviation beyond guaranteed limits.
Can the LT1004IDG4-1-2 be used in series with other references to generate higher voltages?
No - the LT1004IDG4-1-2 is a two-terminal shunt reference and must be used in parallel with its load. Connecting multiple units in series violates its operational topology and risks improper biasing or thermal runaway. For higher reference voltages, use a single higher-voltage reference (e.g., LT1004-2.5) or a precision op-amp-based summing configuration.
LT1004IDG4-1-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LT1004IDG4-1-2 FAQ
1.How can I place an order for LT1004IDG4-1-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004IDG4-1-2 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 LT1004IDG4-1-2 reliable?
The price and inventory of LT1004IDG4-1-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1004IDG4-1-2 is usually 5 days.
3.What payment methods are accepted for LT1004IDG4-1-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004IDG4-1-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004IDG4-1-2?
LT1004IDG4-1-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004IDG4-1-2 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 LT1004IDG4-1-2?
For technical support, including LT1004IDG4-1-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004IDG4-1-2 requirements.
6.How does Aetrix verify that LT1004IDG4-1-2 is sourced from the original manufacturer or authorized distributors?
All LT1004IDG4-1-2 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 LT1004IDG4-1-2 meets industry standards.
7.What is the process for return or replacement of LT1004IDG4-1-2?
All LT1004IDG4-1-2 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004IDG4-1-2, 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 LT1004IDG4-1-2 part is unused and in its original packaging.
Return procedure for LT1004IDG4-1-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1004IDG4-1-2 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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