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Analog Devices Inc. LT1004CH-2.5
- Part No.:
- LT1004CH-2.5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-46-2 Metal Can
- Datasheet:
-
LT1004CH-2.5.pdf
- Description:
- IC VREF SHUNT 2.5V
- Quantity:
- Payment:
- Shipping:
Inventory:4,766
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Product details
Overview
LT1004CH-2.5 from Analog Devices (formerly Linear Technology) is a 2-terminal micropower bandgap voltage reference delivering a precise 2.500 V output with guaranteed ±20 mV initial accuracy over 0°C to 70°C. It operates from 10 µA to 20 mA, features 0.6 Ω typical reverse dynamic impedance at 100 µA, and maintains low noise (60 µV RMS, 10 Hz–10 kHz) for portable test instruments and battery-operated systems.
For engineers reviewing the LT1004CH-2.5 datasheet, LT1004CH-2.5 pinout, LT1004CH-2.5 application, or LT1004CH-2.5 equivalent, key selection criteria include guaranteed 2.5 V output tolerance, ultra-low quiescent current, temperature coefficient performance across commercial range, and compatibility with TO-92-based low-power analog signal chains.
Technical Context
The LT1004CH-2.5 implements a bandgap-derived reference core optimized for micropower operation, achieving stable 2.5 V regulation with minimal thermal drift. Its 2-terminal architecture eliminates need for external biasing, simplifying design in space-constrained applications.
It delivers specified performance across 0°C to 70°C ambient, supports reverse breakdown currents up to 30 mA, and exhibits <1.5 mV voltage change over 100 µA–1 mA operating current range - enabling accurate current-source and precision divider configurations without trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±20 mV (guaranteed initial accuracy at TA = 25°C; ensures direct use in 12-bit ADC references without calibration) |
| Operating Current Range | 10 µA to 20 mA (enables operation from microamp-level sensor excitation to higher-current buffer stages) |
| Temp Coefficient | 20 ppm/°C max (ensures ≤±0.5 mV drift over full 0°C–70°C range; critical for unregulated battery supplies) |
| Dynamic Impedance | 0.6 Ω typ at 100 µA (minimizes load-induced error in high-gain feedback loops) |
| Noise (10 Hz–10 kHz) | 60 µV RMS (low enough for 16-bit DAC reference without additional filtering) |
| Long-Term Stability | 20 ppm/kHr (supports >5-year field reliability in metering applications without recalibration) |
Pinout & Package
LT1004CH-2.5 is housed in a 3-lead plastic TO-92 package (Z package), with leads configured as Anode, Cathode, and NC (non-connected). The device uses a 2-terminal functional interface: Cathode (Pin 1) connects to system ground or reference return; Anode (Pin 2) delivers regulated 2.5 V output; Pin 3 is internally unused and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 (Cathode) | Reference Return / Ground Node | Low-impedance return path; must be tied directly to clean system ground to avoid reference error from IR drop |
| PIN 2 (Anode) | Regulated Output Terminal | Delivers 2.500 V ±20 mV; sinks current into load; requires local 1 µF bypass capacitor for stability |
| PIN 3 (NC) | No Connection | Internally unconnected; must be left floating or grounded per layout best practice - no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | Guaranteed 10 µA minimum operating current enables use in coin-cell-powered devices with multi-year battery life |
| High Initial Accuracy | ±20 mV (±0.8%) tolerance at 2.5 V eliminates factory trimming in cost-sensitive portable instrumentation |
| Low Dynamic Impedance | 0.6 Ω typical ensures <0.1 mV load regulation error for loads drawing up to 1 mA |
| Low Wideband Noise | 60 µV RMS (10 Hz–10 kHz) supports high-resolution data acquisition without external filtering |
| Commercial Temp Range | 0°C to 70°C operation matches standard industrial control and consumer electronics environments |
Applications
| Portable Test Instruments | Battery-Operated Data Loggers |
|---|---|
Use Scenario: Handheld multimeter requiring stable 2.5 V reference for 16-bit ADC conversion under varying battery voltage. IC Role / Device Role / Timing Role: 2-terminal shunt reference providing precision voltage node for analog front-end scaling. Use Value: Delivers ±20 mV accuracy and 60 µV noise without trimming or external regulators - reducing BOM count and PCB area. |
Use Scenario: Remote environmental sensor node powered by two AA cells, logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Micropower voltage reference for ADC and sensor excitation circuitry during active measurement cycles. Use Value: Draws only 10 µA quiescent current, extending battery life beyond 3 years while maintaining 2.5 V reference stability across 0°C–50°C. |
| Current Loop Transmitters | Low-Cost Industrial Meters |
Use Scenario: 4–20 mA transmitter using op-amp-based I/V conversion where reference sets loop zero and span. IC Role / Device Role / Timing Role: Precision shunt reference establishing 2.5 V reference for DAC-controlled current source. Use Value: 20 ppm/°C tempco and 0.6 Ω dynamic impedance minimize span drift and nonlinearity across 0°C–60°C ambient. |
Use Scenario: Panel-mounted energy meter requiring calibrated voltage scaling for mains monitoring at < $5 BOM target. IC Role / Device Role / Timing Role: Cost-optimized 2.5 V reference for analog-to-digital conversion of isolated voltage sense signals. Use Value: ±20 mV accuracy and TO-92 packaging enable direct replacement of LM385-2.5 without layout changes or calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1634IMS8-2.5 | Higher initial accuracy (±0.05%), lower tempco (10 ppm/°C), but requires 100 µA min current and S0-8 package | Used in high-precision lab equipment; not suitable for sub-10 µA battery systems | Select when long-term stability and tighter tolerance outweigh power budget constraints |
| LM385BZ-2.5 | Wider initial tolerance (±30 mV), higher tempco (50 ppm/°C), same TO-92 package and 10 µA min current | Common in legacy cost-sensitive designs; lacks LT1004CH-2.5's noise and impedance performance | Choose only if existing LM385BZ-2.5 footprint reuse is mandatory and ±30 mV error is acceptable |
Compared with LT1634IMS8-2.5 and LM385BZ-2.5, the LT1004CH-2.5 uniquely balances ±20 mV accuracy, 10 µA operation, and TO-92 compatibility - making it optimal for new portable and battery-powered designs where power, size, and moderate precision must coexist.
Availability
LT1004CH-2.5 is available at Aetrix Electronics and suitable for portable test instruments, battery-operated data loggers, and current loop transmitters requiring stable component supply with consistent parametric performance across production lots.
Supply support for LT1004CH-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
Analog Devices, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT1004CH-2.5 belongs to ADI's legacy Linear Technology micropower reference family, designed specifically for ultra-low-power, high-accuracy voltage referencing in portable and battery-constrained systems.
FAQ
What is the guaranteed initial accuracy of the LT1004CH-2.5?
The LT1004CH-2.5 guarantees ±20 mV initial accuracy at 2.500 V over the 0°C to 70°C temperature range. This specification is tested and binned during manufacturing, ensuring every unit meets this tolerance without user trimming or calibration - a key advantage over generic shunt references like LM385BZ-2.5.
Can the LT1004CH-2.5 operate from a single 3 V battery?
Yes, the LT1004CH-2.5 can operate from a 3 V supply when used as a shunt reference with appropriate current limiting. Its minimum operating current is 10 µA, and it functions stably down to ~2.6 V cathode-to-anode differential - making it viable for 3 V coin-cell or alkaline systems when paired with a series resistor sized for ≥10 µA bias.
Does the LT1004CH-2.5 require an output capacitor?
Yes, a 1 µF ceramic capacitor placed directly between the anode (Pin 2) and cathode (Pin 1) is recommended per the datasheet to suppress high-frequency instability and reduce noise. Omitting it may cause oscillation or increased output ripple, especially when driving capacitive loads or op-amp inputs.
What is the maximum reverse breakdown current rating for the LT1004CH-2.5?
The absolute maximum reverse breakdown current for the LT1004CH-2.5 is 30 mA. Exceeding this value risks permanent damage. For reliable operation, design the current-limiting resistor to keep worst-case current (e.g., at max input voltage and min reference voltage) below 20 mA - providing margin for temperature and process variation.
Is Pin 3 of the LT1004CH-2.5 electrically connected internally?
No, Pin 3 of the LT1004CH-2.5 is a no-connect (NC) terminal with no internal bond wire or silicon connection. It must be left unconnected in the circuit - grounding or routing it to any net introduces no functional benefit and may compromise mechanical integrity or thermal performance of the TO-92 package.
LT1004CH-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-46-2 Metal Can
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
LT1004CH-2.5 FAQ
1.How can I place an order for LT1004CH-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1004CH-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 LT1004CH-2.5 reliable?
The price and inventory of LT1004CH-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 LT1004CH-2.5 is usually 5 days.
3.What payment methods are accepted for LT1004CH-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1004CH-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1004CH-2.5?
LT1004CH-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1004CH-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 LT1004CH-2.5?
For technical support, including LT1004CH-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1004CH-2.5 requirements.
6.How does Aetrix verify that LT1004CH-2.5 is sourced from the original manufacturer or authorized distributors?
All LT1004CH-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 LT1004CH-2.5 meets industry standards.
7.What is the process for return or replacement of LT1004CH-2.5?
All LT1004CH-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LT1004CH-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 LT1004CH-2.5 part is unused and in its original packaging.
Return procedure for LT1004CH-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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