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Analog Devices Inc. LT1884ACS8#PBF
- Part No.:
- LT1884ACS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1884ACS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:192
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Product details
Overview
LT1884ACS8#PBF 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, 400 pA max input bias current, and 1 V/µs slew rate while consuming less than 1 mA per amplifier at 5 V supply. Its rail-to-rail output swing (within 40 mV of V– and 220 mV of V+) enables robust performance in single-supply battery-powered instrumentation.
For engineers reviewing the LT1884ACS8#PBF datasheet, LT1884ACS8#PBF pinout, LT1884ACS8#PBF application, or LT1884ACS8#PBF equivalent, key selection criteria include picoamp-level input bias current, matched dual-channel precision, temperature-stable offset drift (≤0.8 µV/°C), and SO-8 package compatibility with standard PCB footprints for instrumentation-grade analog front-ends.
Technical Context
The LT1884ACS8#PBF integrates two independent precision op amps sharing a common silicon die to ensure tight matching of offset voltage (≤70 µV), bias current, and CMRR across temperature. Its input stage uses bipolar technology with on-chip bias current cancellation, yielding uncorrelated IB+ and IB−-enabling accurate high-impedance source interfacing without input resistor balancing.
It operates from ±1.35 V to ±15 V or 2.7 V to 36 V total supply, with input common-mode range extending from VEE + 1.2 V to VCC – 1.2 V. Output stage architecture supports fast settling (10 µs to 0.01%) into 2 kΩ loads while maintaining >106 dB CMRR over 1.2 V to 3.8 V common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 50 µV max (LT1884A grade) - ensures ≤0.05 mV DC error in 1 V full-scale precision gain stages |
| Input Bias Current | 400 pA max - enables use with >10 MΩ sensor sources without significant voltage drop or drift |
| Slew Rate | 1 V/µs - supports 100 kHz small-signal bandwidth with <0.1% distortion in unity-gain buffer configurations |
| Supply Current per Amp | 1.4 mA max at 5 V - allows dual-channel precision amplification within 3 mW total power budget |
| Output Swing (VCC = 5 V) | Within 40 mV of V– and 220 mV of V+ - delivers >4.7 V output span for 5 V single-supply data acquisition |
| Offset Voltage Drift | 0.8 µV/°C max - limits drift-induced error to <12 µV over –40°C to +85°C industrial temperature range |
| Open-Loop Gain | 1,000 V/mV min (RL = 10 kΩ) - provides ≥120 dB loop gain for stable 100× closed-loop gain configurations |
Pinout & Package
LT1884ACS8#PBF is housed in an 8-lead plastic SO (SO-8, narrow 0.150") package with standard dual op amp pinout and JEDEC MS-012AC compliant dimensions (4.90 mm × 3.91 mm × 1.75 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply Rail | Accepts 2.7 V to 36 V total supply or +1.35 V to +15 V in split-supply mode; decoupling capacitor required near pin |
| OUT B | Amplifier B Output | Rail-to-rail capable: swings within 40 mV of V– and 220 mV of V+ under 5 mA load |
| –IN B | Inverting Input B | High-impedance node (400 pA max bias); requires guard ring routing in high-precision layouts |
| +IN B | Noninverting Input B | Matches –IN B in offset and drift; no external balancing resistors needed due to uncorrelated bias currents |
| OUT A | Amplifier A Output | Electrically identical to OUT B; channel matching enables differential output or dual-path signal processing |
| –IN A | Inverting Input A | Paired with +IN A for matched gain/CMRR performance; offset match ≤70 µV vs. –IN B at 25°C |
| +IN A | Noninverting Input A | Supports common-mode input up to VEE + 1.2 V and VCC – 1.2 V; clamped diodes protect against ±10 V differential transients |
| V– | Negative Supply Rail | Connect to ground (single supply) or negative rail (split supply); thermal pad not present in SO-8 variant |
Key Features
| Feature | Design Value |
|---|---|
| Picoamp input bias current | 400 pA max enables direct connection to thermocouples, photodiodes, and high-Z pH electrodes without signal degradation |
| Matched dual-channel performance | Offset voltage match ≤70 µV and CMRR match ≥104 dB support precision instrumentation amplifier topologies |
| Rail-to-rail output swing | Delivers >95% of full supply range at 5 mA load, maximizing dynamic range in 3.3 V and 5 V systems |
| Low-noise precision architecture | 9.5 nV/√Hz input voltage noise and 0.05 pA/√Hz current noise preserve SNR in µV-level sensor interfaces |
| Wide supply flexibility | Operates from 2.7 V single supply to ±15 V split supply, simplifying design reuse across portable and industrial platforms |
Applications
| Thermocouple Amplifiers | Bridge Transducer Conditioners |
|---|---|
Use Scenario: Amplifying µV-level Seebeck voltages from K-type thermocouples in industrial temperature monitoring systems. IC Role / Device Role / Timing Role: Primary gain stage with cold-junction compensation interface; configured as noninverting amplifier with 100× gain. Use Value: 50 µV max offset and 0.8 µV/°C drift minimize calibration burden; 400 pA bias current prevents loading of thermocouple junctions. |
Use Scenario: Conditioning Wheatstone bridge outputs from strain gauges in structural health monitoring sensors. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (with external RG) delivering 100–1000× programmable gain and >106 dB CMRR. Use Value: Matched dual channels enable precise differential gain; rail-to-rail output drives 12-bit SAR ADC reference range directly. |
| Instrumentation Amplifiers | Battery-Powered Systems |
Use Scenario: Building discrete 3-op-amp instrumentation amplifiers for medical ECG front-ends requiring ultra-low leakage. IC Role / Device Role / Timing Role: Dual amplifier used for input buffers (A & B) with matched offset and bias to reject common-mode interference. Use Value: ≤70 µV offset match and uncorrelated bias currents eliminate need for matched external resistors, reducing board area and cost. |
Use Scenario: Signal conditioning in handheld gas analyzers powered by two AA cells (2.4–3.2 V nominal). IC Role / Device Role / Timing Role: Single-supply sensor amplifier driving low-power 16-bit ΣΔ ADC with internal reference. Use Value: 1.4 mA max supply current per amp extends battery life; rail-to-rail output maximizes ADC utilization without level-shifting circuitry. |
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 |
|---|---|---|---|
| LTC2050CS8#PBF | Zero-drift architecture (3 µV max VOS, 0.03 µV/°C drift); lower 1/f noise but 0.3 V/µs slew rate | Better DC accuracy for <1 Hz applications; insufficient slew for >10 kHz AC-coupled sensor signals | Select LTC2050CS8#PBF when sub-µV offset stability dominates over bandwidth; avoid for fast-settling multiplexed data acquisition |
| LT1793CS8#PBF | JFET input (10 pA max IB), higher 12 nV/√Hz noise, 2.5 MHz GBW, no rail-to-rail output (clips 1.5 V from rails) | Superior high-frequency noise performance for photodiode transimpedance; incompatible with low-voltage single-supply systems | Choose LT1793CS8#PBF for >100 kHz optical sensing; reject for battery-powered 3.3 V systems requiring full-rail output swing |
Compared with LT1884ACS8#PBF, LTC2050CS8#PBF offers superior DC precision but sacrifices bandwidth and settling speed, while LT1793CS8#PBF provides lower bias current at the cost of output swing limitation and higher voltage noise-making LT1884ACS8#PBF the optimal balance for general-purpose precision analog front-ends.
Availability
LT1884ACS8#PBF is available at Aetrix Electronics and suitable for thermocouple amplifiers, bridge transducer conditioners, and battery-powered instrumentation requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for LT1884ACS8#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 its legacy of high-performance analog ICs. The company specializes in precision signal conditioning, power management, and data conversion solutions for demanding industrial and medical applications.
LT1884ACS8#PBF belongs to Linear's precision rail-to-rail op amp product line, designed specifically for low-voltage, high-accuracy sensor interfaces where picoamp input bias, low offset drift, and matched dual-channel performance are critical.
FAQ
What is the maximum operating supply voltage for LT1884ACS8#PBF?
The LT1884ACS8#PBF supports a total supply voltage range of 2.7 V to 36 V, with absolute maximum ratings of ±20 V on V+ and V– pins. For reliable operation, Analog Devices specifies full electrical performance from 5 V to ±15 V; operation below 5 V is functional but may reduce output drive capability and slew rate.
Does LT1884ACS8#PBF require input bias current compensation resistors?
No, LT1884ACS8#PBF does not require external input bias current compensation resistors. Its on-chip bias current cancellation produces uncorrelated IB+ and IB−, making traditional resistor balancing counterproductive. Instead, keep both input impedances as low as possible to minimize total circuit error-especially critical for LT1884ACS8#PBF's 400 pA max bias current specification.
Can LT1884ACS8#PBF drive capacitive loads without oscillation?
Yes, LT1884ACS8#PBF can drive up to 300 pF capacitive loads in unity-gain configuration without instability. For larger loads or higher gains, add a small series resistor (e.g., 10–50 Ω) between the output and capacitance to isolate the reactive load from the amplifier's feedback node-a technique validated in the LT1884ACS8#PBF datasheet Figure 18.
What is the guaranteed input common-mode voltage range for LT1884ACS8#PBF?
The LT1884ACS8#PBF guarantees proper operation with input voltages from VEE + 1.2 V to VCC – 1.2 V over the full –40°C to +85°C temperature range. Exceeding this range causes gain reduction but no phase reversal; for example, with VCC = 5 V and VEE = 0 V, valid inputs span 1.2 V to 3.8 V.
How does the LT1884ACS8#PBF differ from the standard LT1884CS8#PBF grade?
The LT1884ACS8#PBF is the "A" grade version, featuring tighter specifications: 50 µV max input offset voltage (vs. 80 µV for standard grade), 400 pA max input bias current (vs. 900 pA), and 0.8 µV/°C max offset drift (vs. 1.2 µV/°C). These enhancements make LT1884ACS8#PBF suitable for higher-accuracy applications such as laboratory-grade instrumentation and calibrated sensor modules.
LT1884ACS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 25 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1884ACS8#PBF FAQ
1.How can I place an order for LT1884ACS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1884ACS8#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 LT1884ACS8#PBF reliable?
The price and inventory of LT1884ACS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1884ACS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1884ACS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1884ACS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1884ACS8#PBF?
LT1884ACS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1884ACS8#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 LT1884ACS8#PBF?
For technical support, including LT1884ACS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1884ACS8#PBF requirements.
6.How does Aetrix verify that LT1884ACS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1884ACS8#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 LT1884ACS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1884ACS8#PBF?
All LT1884ACS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1884ACS8#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 LT1884ACS8#PBF part is unused and in its original packaging.
Return procedure for LT1884ACS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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