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Analog Devices Inc. LT1034IS8-1.2#TRPBF
- Part No.:
- LT1034IS8-1.2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1034IS8-1.2#TRPBF.pdf
- Description:
- IC VREF SHUNT 1.225V/7V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,661
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Product details
Overview
LT1034IS8-1.2 from Analog Devices (formerly Linear Technology) is a micropower, precision dual-output voltage reference IC providing a 1.225V bandgap reference and a 7V subsurface zener reference in an 8-lead SOIC package. It delivers ±0.5% initial accuracy, guaranteed 40 ppm/°C temperature drift over –40°C to +85°C, 1Ω dynamic impedance, and operates from 20µA to 20mA - ideal for portable meters and precision regulators requiring low-power, stable references.
For engineers reviewing the LT1034IS8-1.2 datasheet, LT1034IS8-1.2 pinout, LT1034IS8-1.2 application, or LT1034IS8-1.2 equivalent, key selection criteria include guaranteed industrial-grade temperature drift, dual-reference architecture (1.2V + 7V), low quiescent current operation, and SO-8 package compatibility with space-constrained analog signal chains.
Technical Context
The LT1034IS8-1.2 integrates two independent reference elements: a trimmed thin-film bandgap core for the 1.225V output (±0.5% initial tolerance, 40 ppm/°C max drift) and a separate subsurface zener for the 7V output (±3% tolerance, 140 mV current-induced change). Both outputs share a common ground and are electrically isolated under normal biasing.
Its design supports unregulated supply operation via ultra-low dynamic impedance (1Ω typ at 100µA) and wide operating current range (20µA–20mA), enabling direct use in battery-powered systems without external buffering. The SO-8 package supports surface-mount assembly and thermal performance of θJA = 160°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage 1 | 1.225V ±0.5% - precise bandgap output for ADC/DAC biasing and sensor excitation |
| Reference Voltage 2 | 7.0V ±3% - auxiliary zener reference for higher-voltage calibration or comparator thresholds |
| Temp Coefficient | 40 ppm/°C max - guaranteed industrial-range stability for metrology-grade designs |
| Dynamic Impedance | 1Ω typical at 100µA - enables stable regulation even with noisy or varying supply rails |
| Operating Current | 20µA to 20mA - supports ultra-low-power sleep modes and full-load precision simultaneously |
| Long-Term Stability | 20 ppm/√khrs - ensures calibration integrity over years in field-deployed instrumentation |
| Noise (0.1–10Hz) | 6 µVP-P - low flicker noise critical for high-resolution data acquisition systems |
Pinout & Package
LT1034IS8-1.2 uses an 8-lead plastic SOIC (narrow, 0.150") package (S8), with exposed pad not connected. Pin assignments are validated per LTC DWG #05-08-1610 and confirmed on official datasheet TA01.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1.2V Output | Main precision bandgap reference output; low-impedance source for analog subsystems |
| 2 | NC | No internal connection; must be left floating or tied to GND per layout best practice |
| 3 | 1.2V Output | Duplicate 1.2V output pin - electrically identical to Pin 1; used for Kelvin sensing or reduced trace inductance |
| 4 | 7V Output | Auxiliary zener reference output; higher voltage, looser tolerance, suitable for non-critical thresholds |
| 5 | NC | No internal connection; no routing required |
| 6 | NC | No internal connection; no routing required |
| 7 | NC | No internal connection; no routing required |
| 8 | GND | Analog ground reference for both outputs; must be low-impedance, star-connected to system AGND |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent references | Simultaneous 1.225V (precision) and 7V (auxiliary) outputs eliminate need for discrete reference stacking |
| Guaranteed 40 ppm/°C drift | Industrial temperature range (–40°C to +85°C) stability meets Class A instrument requirements |
| 20µA minimum operating current | Enables >10-year battery life in handheld calibrators and portable DMMs |
| 1Ω dynamic impedance | Permits direct driving of 12-bit SAR ADC references without buffer op-amps |
| Low 0.1–10Hz noise | 6 µVP-P supports <16-bit effective resolution in DC-coupled measurement front-ends |
Applications
| Portable Meters | Precision Regulators |
|---|---|
Use Scenario: Handheld digital multimeters and clamp meters operating from single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and auto-ranging circuitry. Use Value: 20µA quiescent current extends battery life; 40 ppm/°C drift ensures accuracy across environmental conditions without recalibration. | Use Scenario: Low-noise linear regulators for sensor signal conditioning and RF bias supplies. IC Role / Device Role / Timing Role: Reference input for error amplifiers in LDO feedback loops. Use Value: 1Ω dynamic impedance prevents loop instability; low 0.1–10Hz noise avoids modulation artifacts in sensitive analog paths. |
| Calibrators | Industrial Data Acquisition |
Use Scenario: Benchtop and field-portable calibration sources generating precise DC voltage standards. IC Role / Device Role / Timing Role: Master reference for programmable gain amplifier (PGA) offset trimming and DAC output scaling. Use Value: 20 ppm/√khrs long-term stability maintains traceability between NIST-certified calibrations over multi-year intervals. | Use Scenario: Modular PLC analog input modules measuring thermocouples, RTDs, and 4–20mA loops. IC Role / Device Role / Timing Role: Dual-rail reference for simultaneous 1.2V (sensor interface) and 7V (isolation barrier bias) generation. Use Value: Integrated dual outputs reduce BOM count and PCB area versus discrete reference solutions while maintaining isolation integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1004CS8-1.2 | Single 1.2V reference; no 7V output; 50 ppm/°C max drift; 20µA min current | Lacks auxiliary reference; requires external zener for 7V functions; lower accuracy grade | Select when only 1.2V precision is needed and cost sensitivity outweighs dual-output convenience |
| LT1236ACS8-1.2 | Buried zener reference; 1.2V ±0.05% initial; 2 ppm/°C drift; 1.2mA min current; higher noise (1.2 µVP-P) | Superior stability but incompatible low-current operation; no 7V output; higher power demand | Select for lab-grade metrology where ultra-low drift justifies higher current and cost; not suitable for battery operation |
Compared with LT1004CS8-1.2 and LT1236ACS8-1.2, the LT1034IS8-1.2 uniquely balances industrial-grade drift guarantee, dual-output capability, and micropower operation - making it the only option supporting both 1.2V precision and 7V auxiliary functionality below 20µA.
Availability
LT1034IS8-1.2 is available at Aetrix Electronics and suitable for portable meters, precision regulators, and calibrators requiring stable component supply with guaranteed industrial temperature performance and long-term calibration integrity.
Supply support for LT1034IS8-1.2 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
Analog Devices acquired Linear Technology in 2017 and maintains full product support, datasheet archives, and technical documentation for legacy Linear parts including the LT1034 series.
The LT1034 family was designed specifically for high-stability, low-power analog systems - targeting portable test equipment, industrial process control, and precision data acquisition where dual reference voltages and guaranteed temperature behavior are essential.
FAQ
What is the guaranteed temperature coefficient for LT1034IS8-1.2 over its full operating range?
The LT1034IS8-1.2 guarantees a maximum temperature coefficient of 40 ppm/°C across its full industrial operating range of –40°C to +85°C. This specification is explicitly tested and warranted per the "G"-rated parameters in the official datasheet's Electrical Characteristics table, distinguishing it from commercial-grade variants like the LT1034CS8-1.2 which guarantee only 20 ppm/°C.
Does LT1034IS8-1.2 provide true dual independent reference outputs?
Yes - the LT1034IS8-1.2 provides two electrically independent reference outputs: a 1.225V bandgap reference (Pins 1 and 3) and a 7.0V subsurface zener reference (Pin 4), sharing only the GND terminal (Pin 8). The datasheet confirms no functional interaction between outputs under proper biasing, and forward-biasing one diode does not affect the other's operation.
Can LT1034IS8-1.2 operate from a 2.0V supply?
No - the LT1034IS8-1.2 requires a minimum reverse bias voltage exceeding its highest reference output. To enable both 1.225V and 7V outputs, the supply must be ≥7.3V (per Absolute Maximum Ratings and Reverse Breakdown Voltage spec). Operation at 2.0V is outside absolute maximum ratings and will not activate either reference.
What is the meaning of "NC" pins on LT1034IS8-1.2, and how should they be handled?
The NC pins (2, 5, 6, 7) on LT1034IS8-1.2 have no internal connection and serve only mechanical or package alignment roles. Per Linear Technology's package drawing (LTC DWG #05-08-1610), they must remain unconnected - neither tied to GND nor routed - to avoid parasitic coupling or unintended current paths that could degrade reference stability.
How does LT1034IS8-1.2 compare to LT1004CS8-1.2 in terms of long-term stability?
The LT1034IS8-1.2 specifies 20 ppm/√khrs long-term stability, matching the LT1004CS8-1.2's rated value. However, the LT1034IS8-1.2 achieves this with dual outputs and guaranteed 40 ppm/°C drift over industrial temperature, whereas the LT1004CS8-1.2 offers only single 1.2V output and 50 ppm/°C drift - making LT1034IS8-1.2 more suitable for multi-decade calibration-critical applications.
LT1034IS8-1.2#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):
- 1.225V, 7V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1.2%
- Temperature Coefficient:
- 40ppm/°C, -
- Noise - 0.1Hz to 10Hz:
- 4µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 20 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1034IS8-1.2#TRPBF FAQ
1.How can I place an order for LT1034IS8-1.2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1034IS8-1.2#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 LT1034IS8-1.2#TRPBF reliable?
The price and inventory of LT1034IS8-1.2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1034IS8-1.2#TRPBF is usually 5 days.
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Once your LT1034IS8-1.2#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 LT1034IS8-1.2#TRPBF?
For technical support, including LT1034IS8-1.2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1034IS8-1.2#TRPBF requirements.
6.How does Aetrix verify that LT1034IS8-1.2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1034IS8-1.2#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 LT1034IS8-1.2#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1034IS8-1.2#TRPBF?
All LT1034IS8-1.2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1034IS8-1.2#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 LT1034IS8-1.2#TRPBF part is unused and in its original packaging.
Return procedure for LT1034IS8-1.2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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