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Analog Devices Inc. LT1034IS8-2.5#TRPBF
- Part No.:
- LT1034IS8-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1034IS8-2.5#TRPBF.pdf
- Description:
- IC VREF SHUNT 2.5V/7V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
LT1034IS8-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a micropower dual-output precision voltage reference IC providing 2.5V ±0.4% and 7V ±3% outputs in an 8-lead SOIC package. It delivers guaranteed 20 ppm/°C temperature drift over –40°C to 85°C, operates down to 20µA supply current, and features 1Ω dynamic impedance for stable regulation in low-power instrumentation and calibration systems.
For engineers reviewing the LT1034IS8-2.5#TRPBF datasheet, LT1034IS8-2.5#TRPBF pinout, LT1034IS8-2.5#TRPBF application, or LT1034IS8-2.5#TRPBF equivalent, key selection criteria include industrial-temperature micropower reference stability, dual-voltage capability, low-noise 2.5V output, and compatibility with unregulated supplies in portable test equipment and sensor signal chains.
Technical Context
The LT1034IS8-2.5#TRPBF integrates two independent references: a trimmed thin-film bandgap core for the 2.5V output (1% initial tolerance, 20 ppm/°C drift) and a subsurface zener for the 7V auxiliary output. Its operation at 20µA–20mA enables use in battery-powered systems without sacrificing accuracy.
It employs low-impedance buffered outputs-1Ω dynamic impedance at 100µA for the 2.5V rail and ≤2.5Ω for the 7V rail-enabling direct drive of ADC references and op-amp bias networks without external buffering. The SO-8 package supports surface-mount assembly with thermal resistance θJA = 160°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| 2.5V Output Voltage | 2.500 V ±0.4% (2.46 V to 2.54 V), enabling 12-bit ADC reference accuracy without trimming |
| Temperature Drift | 20 ppm/°C max (–40°C to 85°C), ensuring ≤±1.2 mV total drift across full industrial range |
| Operating Current | 15 µA min / 20 mA max, supporting ultra-low-power sleep modes and high-drive transient conditions |
| Dynamic Impedance | 1.0 Ω typ at 100 µA (2.5V output), minimizing load-induced voltage shift in precision circuits |
| Low-Frequency Noise | 6 µVP-P (0.1 Hz to 10 Hz), critical for high-resolution weigh-scale and sensor front-end designs |
| Long-Term Stability | 20 ppm/√khrs, reducing calibration frequency in field-deployed metrology instruments |
| 7V Output Voltage | 7.0 V ±3% (6.8 V to 7.3 V), suitable for auxiliary biasing where absolute accuracy is secondary to stability |
Pinout & Package
LT1034IS8-2.5#TRPBF uses an 8-lead plastic SOIC (S8) package with standard 1.27 mm pitch, JEDEC MS-012 compliant, body size 4.9 mm × 3.9 mm × 1.75 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 2.5V Output | Main precision reference output; low-impedance source for ADCs, DACs, and comparator thresholds |
| 2 | No Connect | Internally unused; must be left floating or tied to GND per layout best practice |
| 3 | 2.5V Output | Duplicate 2.5V output pin for improved current sharing and reduced trace inductance |
| 4 | 7V Output | Auxiliary reference output; higher noise and drift than 2.5V rail, used for non-critical biasing |
| 5 | No Connect | Internally unused; no electrical function; avoid routing signals nearby |
| 6 | No Connect | Internally unused; electrically isolated; recommended to tie to GND for mechanical stability |
| 7 | No Connect | Internally unused; no internal connection; leave unconnected or ground if needed for EMI control |
| 8 | GND | Analog ground reference; requires low-impedance connection to system AGND plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent references | Simultaneous 2.5V (precision) and 7V (auxiliary) outputs eliminate need for separate reference ICs in multi-rail systems |
| Micropower operation | 20 µA minimum operating current enables >10-year battery life in portable calibrators and handheld meters |
| Guaranteed industrial drift | 20 ppm/°C max over –40°C to 85°C ensures consistent performance without derating in harsh environments |
| Low dynamic impedance | 1 Ω output impedance prevents load-induced errors when driving 10 kΩ ADC input or op-amp feedback networks |
| Low 0.1–10 Hz noise | 6 µVP-P noise supports sub-16-bit resolution in DC-coupled sensor interfaces without external filtering |
Applications
| Portable Digital Multimeters | Precision Data Acquisition Systems |
|---|---|
|
Use Scenario: Battery-powered handheld DMM requiring stable 2.5V reference for 5½-digit ADC conversion and auto-ranging circuitry. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC and analog front-end gain calibration. Use Value: 20 ppm/°C drift and 6 µVP-P noise ensure <0.01% measurement repeatability across temperature and time without recalibration. |
Use Scenario: Industrial DAQ module with simultaneous 16-bit analog inputs, programmable gain, and isolated USB interface. IC Role / Device Role / Timing Role: Dual-reference source: 2.5V for ADC/DAC reference and 7V for op-amp bias rails and level-shifting. Use Value: Single-package dual output reduces BOM count and PCB area while maintaining channel-to-channel reference matching. |
| Field-Deployed Calibrators | Medical Sensor Signal Conditioners |
|
Use Scenario: Handheld pressure/temperature calibrator used in oil & gas field service with wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision reference for excitation current sources and ratiometric bridge measurements. Use Value: Guaranteed 20 ppm/°C drift and 20 ppm/√khrs long-term stability minimize annual calibration labor and downtime. |
Use Scenario: Low-power wearable ECG front-end with ultra-low-noise amplification and 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-noise 2.5V reference for ADC and PGA biasing; 7V output powers high-side current sources. Use Value: 6 µVP-P 0.1–10 Hz noise directly improves SNR by ≥3 dB versus LM385-based designs, extending diagnostic resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5025IDR | Single 2.5V output, 3 ppm/°C drift, 3.6 µVP-P noise, 1 mA min operating current | Higher accuracy but higher power; lacks 7V auxiliary output | Choose for ultra-high-precision systems where dual output is unnecessary and lower noise is critical |
| LT6655IMS8-2.5 | Single 2.5V output, 10 ppm/°C drift, 2 µVP-P noise, 50 µA min operating current, wider temp range (–55°C to 125°C) | Superior noise and drift, but no 7V rail; higher quiescent current | Prefer when long-term stability and ultra-low noise outweigh micropower and dual-output requirements |
Compared with REF5025IDR and LT6655IMS8-2.5, the LT1034IS8-2.5#TRPBF uniquely delivers dual-voltage capability at micropower levels, making it optimal for space-constrained, battery-operated instruments needing both precision and auxiliary biasing-without trade-offs in size, cost, or supply flexibility.
Availability
LT1034IS8-2.5#TRPBF is available at Aetrix Electronics and suitable for portable meters, precision regulators, and calibrators requiring stable component supply across extended industrial temperature ranges and multi-year production cycles.
Supply support for LT1034IS8-2.5#TRPBF 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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs, including precision references, amplifiers, and power management solutions for industrial, medical, and test equipment.
The LT1034IS8-2.5#TRPBF belongs to Linear's micropower precision reference product line, designed specifically for battery-powered instrumentation, portable calibration tools, and sensor signal chains demanding low drift, low noise, and minimal supply current.
FAQ
What is the operating temperature range of the LT1034IS8-2.5#TRPBF?
The LT1034IS8-2.5#TRPBF is rated for industrial operation from –40°C to +85°C. This range is explicitly guaranteed in the datasheet for all key parameters including 2.5V output voltage, temperature drift (20 ppm/°C max), and dynamic impedance. The "I" grade designation confirms this extended temperature qualification, distinguishing it from the commercial-grade "C" version.
Does the LT1034IS8-2.5#TRPBF require external capacitors for stability?
No, the LT1034IS8-2.5#TRPBF is internally compensated and does not require external output capacitors for stability. Its 1Ω dynamic impedance and low-noise architecture allow direct connection to ADC reference inputs or op-amp bias nodes. However, a 100 nF ceramic capacitor placed close to Pin 1 (2.5V output) and Pin 8 (GND) is recommended to suppress high-frequency noise in noisy environments.
Can the 7V output of the LT1034IS8-2.5#TRPBF be used as a primary reference?
The 7V output of the LT1034IS8-2.5#TRPBF is specified with ±3% tolerance and 40 ppm/°C drift (guaranteed), making it unsuitable as a primary precision reference. It is intended for auxiliary functions such as op-amp biasing, LED drivers, or non-critical comparators-where absolute accuracy is less critical than supply independence. The 2.5V output remains the designated high-accuracy rail.
What is the minimum supply current required for the LT1034IS8-2.5#TRPBF to maintain specification?
The LT1034IS8-2.5#TRPBF requires a minimum operating current of 15 µA for the 2.5V output and 100 µA for the 7V output, as confirmed in the Electrical Characteristics table. At 15 µA, the 2.5V output meets all specifications including drift and noise; operation below this current may cause increased drift or output deviation beyond datasheet limits.
How does the LT1034IS8-2.5#TRPBF compare to the LT1004 in terms of performance?
The LT1034IS8-2.5#TRPBF improves upon the LT1004 with tighter initial tolerance (1% vs. 2%), lower guaranteed temperature drift (20 ppm/°C vs. 50 ppm/°C), lower dynamic impedance (1Ω vs. ~5Ω), and integrated dual outputs. Unlike the LT1004, the LT1034IS8-2.5#TRPBF also offers industrial temperature grading and superior long-term stability (20 ppm/√khrs), making it a direct high-performance upgrade path.
LT1034IS8-2.5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt, Dual
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V, 7V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1.6%
- Temperature Coefficient:
- 40ppm/°C, -
- Noise - 0.1Hz to 10Hz:
- 6µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 30 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1034IS8-2.5#TRPBF FAQ
1.How can I place an order for LT1034IS8-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1034IS8-2.5#TRPBF 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 LT1034IS8-2.5#TRPBF reliable?
The price and inventory of LT1034IS8-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1034IS8-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1034IS8-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1034IS8-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1034IS8-2.5#TRPBF?
LT1034IS8-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1034IS8-2.5#TRPBF 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 LT1034IS8-2.5#TRPBF?
For technical support, including LT1034IS8-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1034IS8-2.5#TRPBF requirements.
6.How does Aetrix verify that LT1034IS8-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1034IS8-2.5#TRPBF 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 LT1034IS8-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1034IS8-2.5#TRPBF?
All LT1034IS8-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1034IS8-2.5#TRPBF, 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 LT1034IS8-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LT1034IS8-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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