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Analog Devices Inc. LT1884IS8#TRPBF
- Part No.:
- LT1884IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1884IS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,241
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Product details
Overview
LT1884IS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual precision rail-to-rail output operational amplifier optimized for low-voltage, high-accuracy signal conditioning. It delivers 50 µV max input offset voltage (A-grade), 400 pA max input bias current, and 1 V/µs slew rate while consuming ≤1 mA per amplifier at ±15 V - enabling high-fidelity amplification in thermocouple interfaces, bridge sensor conditioners, and battery-powered instrumentation.
For engineers reviewing the LT1884IS8#TRPBF datasheet, LT1884IS8#TRPBF pinout, LT1884IS8#TRPBF application, or LT1884IS8#TRPBF equivalent, this page provides verified specifications, SO-8 package layout, real-world use cases in precision analog front-ends, and validated alternative options for low-drift, picoamp-input op amp selection.
Technical Context
The LT1884IS8#TRPBF employs a bipolar input stage with on-chip bias current cancellation to achieve ultralow 400 pA max input bias current while maintaining 0.8 µV/°C max offset drift. Its rail-to-rail output stage swings within 40 mV of V– and 220 mV of V+ across 2.7 V to 36 V total supply range, supporting both single-supply (e.g., 5 V) and split-supply (±15 V) operation without performance degradation.
It features 1.2 MHz gain-bandwidth product, 108 dB min CMRR, and 132 dB min PSRR - all specified over –40°C to +85°C industrial temperature range. Channel matching (ΔVOS ≤70 µV, ΔIB ≤600 pA) enables accurate differential signal processing in dual-amplifier configurations such as instrumentation amplifier front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 50 µV max (A-grade, –40°C to +85°C) - ensures ≤0.1% error in 50 mV full-scale sensor outputs without trimming. |
| Input Bias Current | 400 pA max (A-grade, –40°C to +85°C) - supports ≥10 MΩ source impedances with <1 µV error contribution. |
| Slew Rate | 1 V/µs (typical, AV = –1) - settles 2 V step within 10 µs to 0.01%, suitable for 10 kHz precision waveform generation. |
| Supply Current | 1.4 mA max per amplifier at 5 V - enables dual-channel precision amplification in sub-3 mA total system budget. |
| Output Swing | Within 40 mV of V– and 220 mV of V+ (at 5 mA load) - preserves >95% dynamic range in 3.3 V single-supply systems. |
| CMRR / PSRR | 106 dB / 108 dB min (full temp range) - rejects >200 µV of common-mode or supply noise in 1 V input signals. |
| Gain-Bandwidth | 1.2 MHz min - supports stable unity-gain buffering and closed-loop gains up to 12 at 100 kHz. |
Pinout & Package
LT1884IS8#TRPBF is housed in an 8-lead plastic SO (SO-8, narrow 0.150") package with standard dual op amp pinout and JEDEC MS-012AC footprint. Thermal resistance θJA = 190°C/W enables operation at full rated load up to +85°C ambient without heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Noninverting input of Amplifier A - high-impedance node requiring guard ring layout for picoamp-level accuracy. |
| 2 | –IN A | Inverting input of Amplifier A - matched to Pin 1 for optimal CMRR; avoid asymmetric trace lengths. |
| 3 | OUT A | Amplifier A output - capable of sourcing/sinking 5 mA while maintaining rail-to-rail swing specification. |
| 4 | V– | Negative supply rail - shared return for both amplifiers; decoupling capacitor required within 1 cm. |
| 5 | OUT B | Amplifier B output - electrically isolated from OUT A; channel separation >100 dB at 10 kHz. |
| 6 | –IN B | Inverting input of Amplifier B - matched to Pin 7; ΔVOS ≤70 µV vs Pin 2 enables precision differential gain stages. |
| 7 | +IN B | Noninverting input of Amplifier B - identical input structure to Pin 1; same bias current cancellation behavior. |
| 8 | V+ | Positive supply rail - accepts 2.7 V to 18 V (single) or ±1.35 V to ±15 V (split); bypass with 0.1 µF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range in 3.3 V and 5 V systems - eliminates need for level-shifting or supply boosting. |
| Picoamp input bias current | 400 pA max enables direct interfacing with high-Z sensors (e.g., pH electrodes, piezoresistive bridges) without guard buffers. |
| Low offset drift | 0.8 µV/°C max ensures <10 µV total offset shift over –40°C to +85°C - critical for uncalibrated industrial temperature measurement. |
| Matched dual architecture | ΔVOS ≤70 µV and ΔIB ≤600 pA allow precise differential amplification and instrumentation amplifier topologies without external trimming. |
| Wide supply range | Operates from 2.7 V single supply to ±15 V split supply - simplifies design reuse across portable, industrial, and test equipment platforms. |
Applications
| Thermocouple Amplifiers | Bridge Transducer Conditioners |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltages from K-type thermocouples in HVAC controllers with cold-junction compensation. IC Role / Device Role / Timing Role: Primary gain stage with programmable gain (via external resistors) and low-noise DC coupling. Use Value: 50 µV max VOS and 0.8 µV/°C drift minimize calibration burden; rail-to-rail output drives 12-bit ADC reference range directly. |
Use Scenario: Conditioning Wheatstone bridge outputs from strain gauges in load cells used in industrial weighing systems. IC Role / Device Role / Timing Role: First-stage differential amplifier with matched inputs to reject common-mode bridge excitation noise. Use Value: ΔVOS ≤70 µV and 106 dB CMRR suppress bridge imbalance errors; 400 pA IB avoids loading high-R bridge arms. |
| Instrumentation Amplifiers | Battery-Powered Systems |
|
Use Scenario: Building discrete 3-op-amp instrumentation amps for medical ECG front-ends requiring ultra-low input current. IC Role / Device Role / Timing Role: Input buffer pair (A & B) providing high-Z, low-drift, matched gain paths before output stage. Use Value: Matched ΔIB ≤600 pA prevents common-mode to differential conversion; 1.2 MHz GBW supports 1 kHz ECG bandwidth. |
Use Scenario: Signal conditioning in handheld multimeters powered by two AA cells (3 V nominal). IC Role / Device Role / Timing Role: Precision amplifier for autoranging voltage/current measurement circuits operating down to 2.7 V supply. Use Value: 1.4 mA max supply current per amp enables dual-channel operation within 3 mA total; rail-to-rail output maximizes ADC utilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision dual op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050HS8#TRPBF | Zero-drift architecture; 3 µV max VOS, 0.015 µV/°C drift - superior DC accuracy but lower 1.5 MHz GBW and higher 1.1 mA supply current. | Better for µV-level DC stability (e.g., precision weigh scales); less suitable for >100 kHz AC-coupled signal chains. | Select when long-term DC drift dominates error budget; accept trade-off in bandwidth and power. |
| OPA2189IDR | Zero-drift, 25 µV max VOS, 0.005 µV/°C drift, 10 MHz GBW - higher speed and lower drift, but 1.3 mA supply current and no guaranteed 400 pA IB spec. | Preferred for high-speed precision data acquisition (e.g., 16-bit SAR ADC drivers) where IB <1 nA suffices. | Choose for wideband precision applications needing <0.1 µV/°C drift; verify input bias compatibility with sensor impedance. |
Compared with LT1884IS8#TRPBF, LTC2050HS8#TRPBF offers 17× lower drift but sacrifices 25% bandwidth and increases supply current by 20%; OPA2189IDR delivers 8× higher GBW and 10× lower drift at higher quiescent power and unguaranteed picoamp input bias.
Availability
LT1884IS8#TRPBF is available at Aetrix Electronics and suitable for thermocouple amplification, bridge transducer conditioning, and battery-powered instrumentation requiring stable component supply across industrial temperature ranges.
Supply support for LT1884IS8#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 precision analog portfolio. Linear pioneered high-performance op amps with picoamp inputs and rail-to-rail outputs for demanding industrial and instrumentation applications.
LT1884IS8#TRPBF belongs to Linear's precision dual op amp family designed specifically for low-drift, low-bias-current signal conditioning in sensor interfaces, medical devices, and portable test equipment.
FAQ
What is the maximum operating temperature range for LT1884IS8#TRPBF?
LT1884IS8#TRPBF is specified and guaranteed over –40°C to +85°C (industrial temperature range). Its absolute maximum junction temperature is 150°C, and thermal resistance θJA is 190°C/W in the SO-8 package. This allows reliable operation in enclosed industrial enclosures without forced airflow when power dissipation remains below 33 mW per amplifier.
Does LT1884IS8#TRPBF support true rail-to-rail input operation?
No, LT1884IS8#TRPBF has rail-to-rail *output* swing but limited input common-mode range: VEE + 1.2 V to VCC – 1.2 V (guaranteed). Exceeding this range causes gain collapse without reversal. For true rail-to-rail input capability, consider alternatives like LTC6081 or OPA2333 - but note these lack the 400 pA input bias current of LT1884IS8#TRPBF.
Can LT1884IS8#TRPBF drive capacitive loads?
Yes, LT1884IS8#TRPBF can drive up to 300 pF in unity-gain configuration without oscillation. Stability improves with higher closed-loop gain - e.g., 500 pF is supported at AV = 10. For loads >300 pF, add a 10–50 Ω isolation resistor between output and capacitance to maintain phase margin above 45°.
What is the difference between LT1884IS8#TRPBF and LT1884ACS8#TRPBF?
LT1884IS8#TRPBF is the industrial-grade version (–40°C to +85°C, tested), while LT1884ACS8#TRPBF is commercial-grade (0°C to +70°C, not tested at extremes). Both share identical SO-8 packaging and electrical specs at 25°C, but only the 'I' grade guarantees 50 µV max VOS and 400 pA max IB across the full industrial range - critical for uncalibrated field-deployed systems.
Is LT1884IS8#TRPBF pin-compatible with other dual op amps in SO-8?
Yes, LT1884IS8#TRPBF uses the industry-standard dual op amp pinout (Pin 1 = +IN A, Pin 2 = –IN A, Pin 3 = OUT A, Pin 4 = V–, Pin 5 = OUT B, Pin 6 = –IN B, Pin 7 = +IN B, Pin 8 = V+). It is pin-compatible with OP27, AD822, and LM7322 - though electrical performance (bias current, offset, supply current) differs significantly.
LT1884IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 2.2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 150 pA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 850µA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1884IS8#TRPBF FAQ
1.How can I place an order for LT1884IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1884IS8#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 LT1884IS8#TRPBF reliable?
The price and inventory of LT1884IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1884IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1884IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1884IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1884IS8#TRPBF?
LT1884IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1884IS8#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 LT1884IS8#TRPBF?
For technical support, including LT1884IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1884IS8#TRPBF requirements.
6.How does Aetrix verify that LT1884IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1884IS8#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 LT1884IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1884IS8#TRPBF?
All LT1884IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1884IS8#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 LT1884IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1884IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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