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Analog Devices Inc. LT1012IS8#PBF
- Part No.:
- LT1012IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1012IS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:262
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Product details
Overview
LT1012IS8#PBF from Analog Devices (acquired Linear Technology) is a precision operational amplifier designed for ultra-low-input-bias-current, microvolt-offset, low-noise signal conditioning in battery-powered and high-impedance sensor interfaces. It delivers guaranteed 25µV max input offset voltage, 100pA max input bias current, 0.6µV/°C max drift, 0.5µVP-P 0.1Hz–10Hz noise, and operates down to ±1.2V supplies - enabling use in thermocouple amplifiers, charge integrators, and photodiode buffers.
For engineers reviewing the LT1012IS8#PBF datasheet, LT1012IS8#PBF pinout, LT1012IS8#PBF application, or LT1012IS8#PBF equivalent, key selection criteria include picoampere input bias stability over –40°C to +85°C, guaranteed CMRR ≥114dB, PSRR ≥114dB, and internal unity-gain compensation eliminating external compensation components in precision DC-coupled designs.
Technical Context
The LT1012IS8#PBF employs a proprietary bipolar input stage with guarded p-n junctions to achieve sub-100pA bias currents across its full operating temperature range (–40°C to +85°C), while maintaining microvolt-level offset accuracy via laser-trimmed thin-film resistors. Its internal compensation network ensures stable unity-gain operation without external capacitors.
It features dual offset trim pins (Pins 1 and 8) supporting ±800µV adjustment range, an overcompensation terminal (Pin 5) for capacitive load stabilization or noise bandwidth reduction, and input protection diodes rated for ±10mA differential current - all within an 8-lead SOIC (S8) package with 170°C/W thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25µV max - enables direct measurement of µV-level sensor outputs without nulling circuitry in bridge transducer or thermocouple applications. |
| Input Bias Current | 100pA max - preserves signal integrity in >1GΩ source impedance circuits like photodiode amps and saturated standard cell references. |
| Offset Drift | 0.6µV/°C max - ensures <1µV total drift over 0°C–70°C ambient, critical for long-term calibration stability in portable instrumentation. |
| 0.1Hz–10Hz Noise | 0.5µVP-P - supports high-resolution DC measurements in 4.5-digit voltmeters and low-frequency active filters. |
| Supply Current | 500µA max - allows continuous operation on two Ni-Cad cells (±1.2V min) with only 1mW dissipation, ideal for energy-constrained field sensors. |
| CMRR / PSRR | 114dB min - rejects common-mode interference from noisy industrial power rails and suppresses supply ripple in precision ADC reference buffers. |
| Gain Bandwidth | 1.2MHz typical - sufficient for closed-loop gains up to 100 in low-frequency (<10kHz) precision amplification without phase margin loss. |
Pinout & Package
LT1012IS8#PBF uses an 8-lead plastic SOIC (S8) package per LTC DWG #05-08-1610, with 1.27mm pitch, 3.9mm width, and 4.9mm length. Thermal resistance θJA = 170°C/W; maximum junction temperature = 100°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (–) | Connects to one end of 5k–100k potentiometer for fine-tuning input offset voltage over ±800µV range. |
| 2 | Inverting Input (–IN) | High-impedance picoampere-input node; requires guard ring routing to minimize board leakage in µV-accuracy designs. |
| 3 | Non-Inverting Input (+IN) | Matched to Pin 2 for common-mode rejection; must be routed symmetrically with identical trace geometry and length. |
| 4 | Negative Supply (V–) | Accepts –1.2V to –20V; supports single-supply operation when tied to ground with V+ at +2.4V to +40V. |
| 5 | Overcompensation (OVER COMP) | Connects to capacitor (100pF–10nF) to reduce noise bandwidth or improve stability driving >100pF capacitive loads. |
| 6 | Output (OUT) | Delivers ±13V swing into 10kΩ load; capable of sourcing/sinking 5mA at unity gain with <0.2V/µs slew rate. |
| 7 | Positive Supply (V+) | Accepts +1.2V to +20V; minimum ±1.2V operation enables dual-cell battery systems without regulators. |
| 8 | Offset Null (+) | Connects to other end of same potentiometer as Pin 1; forms balanced nulling network with internal amplifier inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed picoampere bias current | Maintains ≤100pA over –40°C to +85°C, enabling stable operation in high-Z pH probes and piezoelectric charge amplifiers. |
| Laser-trimmed microvolt offset | 25µV max spec eliminates need for manual nulling in production test, reducing calibration time in medical sensor modules. |
| Internal unity-gain compensation | Removes requirement for external compensation capacitors in follower and gain-of-ten configurations, simplifying PCB layout. |
| ±1.2V minimum supply operation | Supports direct connection to two Ni-Cd or Li-ion cells, cutting BOM cost and board space versus LDO-based solutions. |
| Dual offset trim terminals | Enables post-assembly calibration to correct system-level errors from PCB leakage and thermoelectric EMFs in metrology equipment. |
Applications
| Thermocouple Amplifier | Photodiode Sensor Interface |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltage from Type J thermocouples across –50°C to +150°C ambient. IC Role / Device Role / Timing Role: Precision DC-coupled op amp providing gain-of-100 with Kelvin-sensed cold-junction compensation. Use Value: 0.6µV/°C drift ensures <1°C error over full range; 100pA bias current prevents loading of thermocouple's ~10Ω source impedance. | Use Scenario: Converting nanoampere photocurrent from silicon PIN diodes in spectrophotometers and smoke detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1GΩ feedback resistor and guarded input traces. Use Value: 0.5µVP-P low-frequency noise enables detection of <10nA signals; picoampere bias avoids dark-current-induced offset errors. |
| 4.5-Digit Voltmeter Input Stage | Bridge Transducer Signal Conditioning |
Use Scenario: Front-end amplifier for handheld digital multimeters requiring 100µV resolution and 0.01% linearity. IC Role / Device Role / Timing Role: High-impedance buffer and programmable-gain stage preceding 12-bit SAR ADC. Use Value: 25µV offset allows zero-error nulling at factory; 114dB CMRR rejects 50/60Hz pickup from adjacent AC wiring. | Use Scenario: Amplifying mV output from 350Ω strain gauge bridges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Instrumentation-grade difference amplifier with matched R1/R2 feedback network. Use Value: Guaranteed 114dB PSRR prevents supply ripple from modulating bridge excitation voltage; 0.6µV/°C drift minimizes thermal zero shift. |
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 1.2µV/°C drift, 1.5nA bias current, no overcompensation pin; requires external nulling. | Not suitable for >100MΩ source impedances or battery-powered designs below ±2V. | Select OP-07DP only if legacy compatibility or lower cost outweighs performance loss in non-critical applications. |
| ADA4522-1ARZ | Zero-drift architecture achieves 0.025µV/°C drift and 0.3pA bias; higher 5.5MHz GBW but consumes 1.2mA supply current. | Better for chopper-stabilized DC accuracy but unsuitable for low-noise analog front ends due to switching artifacts. | Choose ADA4522-1ARZ when long-term drift dominates noise concerns, e.g., laboratory calibration standards. |
Compared with OP-07DP and ADA4522-1ARZ, LT1012IS8#PBF uniquely balances ultra-low bias current, microvolt offset, and sub-1mW power in a single SOIC package - making it optimal for portable, high-impedance sensor nodes where both DC precision and energy efficiency are mandatory.
Availability
LT1012IS8#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, photodiode interfaces, 4.5-digit voltmeters, and bridge transducer signal conditioning requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for LT1012IS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through acquisition of Linear Technology in 2017.
The LT1012IS8#PBF belongs to Linear Technology's legacy precision op amp family, engineered specifically for applications demanding picoampere input bias, microvolt offset, and low-power operation in high-impedance sensor signal chains.
FAQ
What is the guaranteed input offset voltage specification for LT1012IS8#PBF?
The LT1012IS8#PBF guarantees a maximum input offset voltage of 25µV at 25°C across the commercial temperature range (0°C to 70°C). This value is tested and specified per the LT1012A/LT1012 datasheet Rev B, ensuring consistent DC accuracy for precision sensor interfacing without external trimming in most applications.
Can LT1012IS8#PBF operate from a single 3.3V supply?
Yes, LT1012IS8#PBF supports single-supply operation: tie Pin 4 (V–) to ground and apply +3.3V to Pin 7 (V+). Its input common-mode range extends to within 0.3V of either rail, and output swings to within 1.2V of each supply - delivering usable ±1.1V output with 3.3V total headroom, confirmed in the Electrical Characteristics table for LT1012D/S8 variants.
Does LT1012IS8#PBF require external frequency compensation?
No, LT1012IS8#PBF is internally compensated for unity-gain stability. External compensation is unnecessary for standard inverting/non-inverting configurations. However, Pin 5 (OVER COMP) supports optional capacitor connection to improve capacitive load drive or narrow noise bandwidth - a design choice, not a requirement.
How does the offset trim function work on LT1012IS8#PBF?
LT1012IS8#PBF provides dedicated offset null terminals at Pins 1 and 8. A 5kΩ to 100kΩ potentiometer is connected between these pins, with its wiper grounded. Adjusting the potentiometer applies opposing currents to the input stage, enabling ±800µV offset correction - essential for final calibration in metrology-grade instruments using LT1012IS8#PBF.
What is the maximum allowable differential input voltage for LT1012IS8#PBF?
The absolute maximum differential input voltage for LT1012IS8#PBF is ±10mA, as stated in the Absolute Maximum Ratings table. Exceeding ±1V differential input without series limiting resistors risks forward-biasing the internal protection diodes, causing excessive current flow. For safe operation, limit differential input to ≤1V or add external 1kΩ series resistors when driving fast large-signal transients.
LT1012IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1012IS8#PBF FAQ
1.How can I place an order for LT1012IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1012IS8#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 LT1012IS8#PBF reliable?
The price and inventory of LT1012IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1012IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1012IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1012IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1012IS8#PBF?
LT1012IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1012IS8#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 LT1012IS8#PBF?
For technical support, including LT1012IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1012IS8#PBF requirements.
6.How does Aetrix verify that LT1012IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1012IS8#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 LT1012IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1012IS8#PBF?
All LT1012IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1012IS8#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 LT1012IS8#PBF part is unused and in its original packaging.
Return procedure for LT1012IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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