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Analog Devices Inc. LT1012IN8#PBF
- Part No.:
- LT1012IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1012IN8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LT1012IN8#PBF from Analog Devices (formerly Linear Technology) is a precision bipolar operational amplifier optimized for ultra-low input bias current (±100 pA max), microvolt-level offset voltage (25 µV max), and sub-µV/°C drift (0.6 µV/°C max), operating from ±1.2 V supplies. It delivers 5 mA output drive, 114 dB CMRR/PSRR, and 0.5 µVP-P 0.1–10 Hz noise - ideal for charge integrators, thermocouple amplifiers, and low-power instrumentation.
For engineers reviewing the LT1012IN8#PBF datasheet, LT1012IN8#PBF pinout, LT1012IN8#PBF application, or LT1012IN8#PBF equivalent, key selection criteria include guaranteed picoampere input bias over temperature, trimmable offset, ±1.2 V minimum supply operation, and PDIP-8 package compatibility with legacy OP-07 sockets.
Technical Context
The LT1012IN8#PBF uses a proprietary bipolar input stage with guarded base diffusion to achieve stable picoampere bias currents across –40°C to 85°C. Its internal compensation ensures unity-gain stability without external components, while dedicated offset trim (Pins 1 & 8) and overcompensation (Pin 5) terminals support precision nulling and capacitive load optimization.
It features rail-to-rail input common-mode range (±13.5 V at ±15 V supplies), 0.1 V/µs slew rate, and 1 MHz gain-bandwidth product - enabling accurate DC-coupled signal conditioning in battery-powered sensor front-ends and high-impedance measurement circuits where leakage and thermal EMF must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25 µV max - enables sub-10 ppm accuracy in 12-bit DAC output stages without trimming. |
| Input Bias Current | ±100 pA max - supports >1 GΩ source impedances in photodiode and piezoelectric sensor interfaces. |
| Offset Drift | 0.6 µV/°C max - ensures <1 µV total drift over 0°C to 70°C ambient, critical for unattended calibration systems. |
| Supply Current | 500 µA max - allows dual-NiCd battery operation (±1.2 V min) with <1 mW dissipation. |
| CMRR / PSRR | 114 dB min - rejects >500 kΩ common-mode impedance errors and power rail noise in bridge amplifier designs. |
| 0.1–10 Hz Noise | 0.5 µVP-P - preserves signal integrity in low-frequency applications like thermocouple amplification and strain gauge readouts. |
| Output Drive | ±5 mA - directly drives 2 kΩ loads at ±10 V swing, eliminating need for output buffer stages. |
Pinout & Package
LT1012IN8#PBF is housed in an 8-lead PDIP (N8) package with 0.300-inch width, JEDEC MS-001 compliant footprint, and 130°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (–) | Connects to wiper of 5–100 kΩ potentiometer for ±800 µV offset adjustment range. |
| 2 | Inverting Input (–IN) | High-impedance input node; guard ring required to maintain picoampere bias performance. |
| 3 | Non-Inverting Input (+IN) | Matched to Pin 2 for common-mode rejection; requires symmetrical PCB layout and guarding. |
| 4 | Negative Supply (V–) | Accepts –1.2 V to –20 V; case-connected in metal-can variants but isolated in PDIP. |
| 5 | Overcompensation | External capacitor connection point to improve capacitive load stability or narrow noise bandwidth. |
| 6 | Output | Capable of ±5 mA sink/source into 2 kΩ; short-circuit protected for indefinite duration. |
| 7 | Positive Supply (V+) | Accepts +1.2 V to +20 V; supplies internal bias networks and output stage. |
| 8 | Offset Null (+) | Completes offset trim circuit; tied to opposite end of potentiometer from Pin 1. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed ±1.2 V operation | Enables direct use with two NiCd cells or low-voltage energy harvesting sources without LDO pre-regulation. |
| Picoampere bias over full temp | Maintains ≤100 pA input current from –40°C to +85°C, eliminating temperature-dependent leakage errors. |
| Trimmed offset & drift | Allows factory or field calibration to <5 µV offset and <0.2 µV/°C drift via external potentiometer. |
| Internal unity-gain compensation | Eliminates need for external compensation components - simplifies design and improves reliability vs. 741/OP-07. |
| High CMRR at low supply | 114 dB rejection maintained down to ±1.2 V supplies, ensuring accuracy in single-supply derived rails. |
Applications
| Charge Integrator | Thermocouple Amplifier |
|---|---|
Use Scenario: Precision integration of low-level current signals from radiation detectors or photodiodes over seconds to minutes. IC Role / Device Role / Timing Role: Integrator op amp with ultra-low input bias to prevent capacitor self-discharge error and minimize offset drift accumulation. Use Value: Enables >100-second integration time constants with <0.1% error due to input current, supporting sub-picoampere current resolution. | Use Scenario: Cold-junction compensation and millivolt-level amplification of Type J/K thermocouples in industrial temperature controllers. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end with matched inputs and guard-driven PCB layout. Use Value: Achieves ±0.1°C accuracy over –40°C to +85°C ambient without external calibration, leveraging 0.6 µV/°C drift spec. |
| Low-Frequency Active Filter | Bridge Transducer Amplifier |
Use Scenario: 0.01–10 Hz anti-aliasing and noise-rejection filtering in seismic or biomedical signal acquisition. IC Role / Device Role / Timing Role: Dual-stage Sallen-Key or multiple-feedback filter section requiring low 1/f noise and stable DC gain. Use Value: 0.5 µVP-P 0.1–10 Hz noise and <25 µV offset ensure filter passband remains free of DC baseline shift and low-frequency distortion. | Use Scenario: Amplification of mV-level differential outputs from Wheatstone bridge pressure or load cells. IC Role / Device Role / Timing Role: High-common-mode-rejection (114 dB) differential amplifier with 5 mA output drive into bridge excitation resistors. Use Value: Supports 350 Ω bridge loads with <10 ppm nonlinearity error, enabled by ±5 mA output and 0.01% resistor matching tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-07DP | Higher supply current (1.8 mA vs. 0.5 mA), higher bias current (1.8 nA vs. 0.1 nA), no overcompensation pin. | Not suitable for battery-powered or ultra-high-Z sensor interfaces; lacks trim flexibility for low-drift calibration. | Select OP-07DP only when legacy board compatibility outweighs power/bias performance requirements. |
| LTC1050CN8#PBF | Chopper-stabilized architecture; zero-drift (0.01 µV/°C), but higher 1/f noise (1.2 µVP-P) and 2.5 mA supply current. | Better for DC-critical applications needing near-zero drift; worse for low-noise AC-coupled measurements below 10 Hz. | Choose LTC1050CN8#PBF when long-term zero stability dominates over broadband noise and power constraints. |
Compared with OP-07DP and LTC1050CN8#PBF, LT1012IN8#PBF uniquely balances ultra-low bias current, microvolt offset, sub-µV/°C drift, and 500 µA supply current - making it optimal for portable, high-impedance, low-power precision analog front-ends where chopper noise or excessive quiescent draw are unacceptable.
Availability
LT1012IN8#PBF is available at Aetrix Electronics and suitable for charge integrators, thermocouple amplifiers, and low-frequency active filters requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1012IN8#PBF 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 production and technical support for legacy Linear precision op amps including the LT1012 family.
The LT1012 product line was designed specifically for ultra-high-impedance, low-power, DC-precision applications - targeting instrumentation, scientific measurement, and battery-operated sensor systems where picoampere bias and microvolt offset are non-negotiable.
FAQ
What is the minimum supply voltage for reliable operation of the LT1012IN8#PBF?
The LT1012IN8#PBF guarantees operation down to ±1.2 V supplies at 25°C, with ±1.3 V specified over its full 0°C to 70°C operating range. This enables direct use with two NiCd or alkaline cells without regulation. Below ±1.2 V, parameters such as gain, CMRR, and output swing degrade progressively - the LT1012IN8#PBF is not characterized for single-supply or sub-±1.2 V operation.
Can the LT1012IN8#PBF replace an OP-07 in an existing PDIP socket without modifications?
Yes - the LT1012IN8#PBF is pin-compatible with the OP-07 in 8-lead PDIP packages and can be inserted directly into OP-07 sockets. No external compensation or nulling components need removal. However, the LT1012IN8#PBF's lower supply current and bias current may reduce thermal drift in the surrounding circuitry, potentially improving overall system accuracy without layout changes.
How does the overcompensation pin (Pin 5) affect stability and bandwidth in the LT1012IN8#PBF?
Connecting a capacitor (typically 10–1000 pF) between Pin 5 and ground increases phase margin for driving capacitive loads (>100 pF), reduces noise bandwidth, and stabilizes gain-of-1000 logarithmic amplifiers. It trades off slew rate (down to 0.01 V/µs) and bandwidth (to ~10 kHz) for improved step response fidelity - the LT1012IN8#PBF's internal compensation remains active regardless.
What PCB layout practices are essential to achieve the specified 100 pA input bias current in the LT1012IN8#PBF?
To preserve the LT1012IN8#PBF's picoampere input performance, implement a driven guard ring around Pins 2 and 3 tied to the inverting input node, use Teflon or polyimide insulation, remove all flux residues, avoid solder mask over high-impedance traces, and keep input leads short and thermally matched. Board surface contamination or humidity-induced leakage degrades bias current far more than the LT1012IN8#PBF's intrinsic specification.
Is the LT1012IN8#PBF suitable for driving ADC reference buffers in 16-bit SAR converter applications?
Yes - the LT1012IN8#PBF's 25 µV max offset, 0.6 µV/°C drift, and 114 dB PSRR make it well-suited for buffering precision references (e.g., LT1021, REF5025) into 16-bit SAR ADCs. Its 5 mA output drive handles typical 10 µF reference decoupling caps, and its low 0.1–10 Hz noise prevents code flicker. For highest linearity, use the offset trim pins to null residual error before connecting to the ADC REF pin.
LT1012IN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 pA
- Voltage - Input Offset:
- 8 µV
- Current - Supply:
- 380µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1012IN8#PBF FAQ
1.How can I place an order for LT1012IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1012IN8#PBF 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 LT1012IN8#PBF reliable?
The price and inventory of LT1012IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1012IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1012IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1012IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1012IN8#PBF?
LT1012IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1012IN8#PBF 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 LT1012IN8#PBF?
For technical support, including LT1012IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1012IN8#PBF requirements.
6.How does Aetrix verify that LT1012IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1012IN8#PBF 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 LT1012IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1012IN8#PBF?
All LT1012IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1012IN8#PBF, 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 LT1012IN8#PBF part is unused and in its original packaging.
Return procedure for LT1012IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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