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Analog Devices Inc. LT1211CN8#PBF
- Part No.:
- LT1211CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1211CN8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,755
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Product details
Overview
LT1211CN8#PBF from Analog Devices (formerly Linear Technology) is a dual precision operational amplifier optimized for single-supply operation with 14MHz gain-bandwidth product, 7V/µs slew rate, and rail-to-rail output swing to ground. It delivers 20mA output drive, 275µV max input offset voltage at 25°C, and operates from 2.5V to 36V total supply. It is used in high-accuracy signal conditioning for battery-powered instrumentation and DAC current-to-voltage conversion.
For engineers reviewing the LT1211CN8#PBF datasheet, LT1211CN8#PBF pinout, LT1211CN8#PBF application, or LT1211CN8#PBF equivalent, key selection criteria include guaranteed 0.01% settling time (900ns for 2V step), low 12nV/√Hz input noise, ±15mA input current rating, and compatibility with 3.3V/5V/±15V supplies across –40°C to 85°C.
Technical Context
The LT1211CN8#PBF implements a bipolar input stage with bias current cancellation, enabling low input bias current (125nA max) and stable DC precision without trimming. Its architecture supports fast settling via high slew rate and wide bandwidth while maintaining excellent common-mode rejection (86dB min) and power supply rejection (87dB min).
It features dual independent amplifiers in an 8-pin PDIP package with inputs that operate down to ground and outputs capable of sinking current to within 3mV of V–. The device is specified for single 3.3V/5V and split ±15V supplies, with quiescent current as low as 1.3mA per amplifier at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 14MHz typical - enables stable unity-gain operation up to ~14MHz or closed-loop gains with predictable bandwidth. |
| Slew Rate | 7V/µs typical - supports fast transient response in active filters and pulse amplification without distortion. |
| Input Offset Voltage | 275µV maximum at 25°C - ensures ≤0.45LSB error in 2.5V full-scale 12-bit systems. |
| Supply Current per Amp | 1.8mA maximum - allows dual-channel precision amplification in low-power portable designs. |
| Output Drive Current | ±20mA minimum - directly drives 500Ω loads or ADC input buffers without external buffering. |
| Input Noise Voltage | 12nV/√Hz typical at 1kHz - preserves SNR in low-level sensor signal chains like photodiode amplifiers. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and data acquisition environments. |
Pinout & Package
LT1211CN8#PBF is housed in an 8-lead plastic DIP (N8) package with through-hole mounting and JEDEC MS-001 compliant footprint. Thermal resistance θJA = 100°C/W in still air.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers amplified signal; swings to within 3mV of V– and 0.362V above V– at 15mA sink. |
| 2 (–IN A) | Inverting input A | Differential input node; accepts signals down to V– (ground in single-supply use). |
| 3 (+IN A) | Non-inverting input A | Differential input node; supports common-mode range including V–. |
| 4 (V–) | Negative supply | Reference for dual supply or ground return in single-supply configurations. |
| 5 (V+) | Positive supply | Accepts 2.5V to 36V total supply; requires local 0.01µF bypass capacitor. |
| 6 (OUT B) | Amplifier B output | Independent output channel; identical performance and drive capability to OUT A. |
| 7 (–IN B) | Inverting input B | Second differential input; electrically isolated from Channel A with 128dB channel separation. |
| 8 (+IN B) | Non-inverting input B | Second differential input; shares same precision specs and input voltage range as +IN A. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output swing | Output sinks to within 3mV of V–, enabling true single-supply operation with ground-referenced loads. |
| Bias current cancellation | Reduces input bias current to 125nA max, minimizing offset errors in high-impedance feedback networks. |
| Low-noise bipolar input stage | 12nV/√Hz voltage noise and 0.2pA/√Hz current noise optimize dynamic range in sensor interfaces. |
| Fast 0.01% settling | 900ns for 2V step ensures accurate sampling in multiplexed data acquisition systems. |
| Wide supply range support | Operates from 2.5V to 36V total supply, simplifying design across 3.3V, 5V, and ±15V systems. |
Applications
| Active Filters | Photo Diode Amplifiers |
|---|---|
Use Scenario: Second-order Sallen-Key low-pass filter in medical ECG front-end with 1kHz cutoff. IC Role / Device Role / Timing Role: Dual op amp provides gain, filtering, and buffer stages in one package; Channel A as integrator, Channel B as output driver. Use Value: 14MHz GBW ensures phase margin >60° at 1kHz; 7V/µs slew rate prevents distortion on 100mVpp ECG pulses. | Use Scenario: Transimpedance amplifier converting picoamp-level photodiode current to voltage in optical smoke detector. IC Role / Device Role / Timing Role: Single amplifier configured as TIA with 10MΩ feedback resistor; leverages low input bias current and low noise. Use Value: 125nA max input bias current avoids saturation; 12nV/√Hz noise preserves weak signal integrity at 100Hz bandwidth. |
| DAC Current-to-Voltage Amplifiers | Battery-Powered Systems |
Use Scenario: Converting 12-bit DAC current output (0–2mA) to 0–2.5V voltage for microcontroller ADC input. IC Role / Device Role / Timing Role: Precision I-to-V converter using Channel A; Channel B buffers reference or provides gain staging. Use Value: 275µV max VOS limits full-scale error to <0.45LSB; rail-to-ground output matches 0V–2.5V ADC range. | Use Scenario: Signal conditioning in handheld multimeter with 3.3V Li-ion supply and auto-ranging input protection. IC Role / Device Role / Timing Role: Dual amplifier handles input attenuation/gain and anti-aliasing filtering in compact layout. Use Value: 1.3mA typical supply current per amp extends battery life; 2.5V min supply enables operation down to 2.7V cell voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1211CS8#PBF | Same die, SO-8 surface-mount package; θJA = 150°C/W vs 100°C/W for N8. | Preferred for space-constrained PCBs; thermal derating required at high ambient or load. | Select when board area is limited and reflow assembly is available. |
| OP27GPZ | Lower noise (3.5nV/√Hz), slower slew (2.8V/µs), higher VOS (250µV typ), no rail-to-ground output. | Better for ultra-low-noise DC-coupled applications; unsuitable for single-supply ground-swing requirements. | Choose only if noise dominates over speed and output swing in your signal chain. |
Compared with LT1211CS8#PBF, LT1211CN8#PBF offers better thermal performance in through-hole layouts and easier prototyping; versus OP27GPZ, it trades some voltage noise for essential rail-to-ground output and 2.5× faster settling-critical for multiplexed or battery-operated systems.
Availability
LT1211CN8#PBF is available at Aetrix Electronics and suitable for active filters, photodiode amplifiers, DAC current-to-voltage conversion, battery-powered instrumentation, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for LT1211CN8#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 high-performance analog portfolio. Linear pioneered precision, high-speed op amps for demanding industrial and instrumentation applications.
The LT1211 product line was designed specifically for dual-channel, single-supply precision amplification where speed, low noise, and rail-to-ground output are simultaneously required-targeting data acquisition, medical sensors, and portable test equipment.
FAQ
What is the maximum supply voltage for LT1211CN8#PBF?
The LT1211CN8#PBF supports a total supply voltage up to 36V, meaning it can operate on single supplies up to +36V/V– = 0V or split supplies such as ±18V. Absolute maximum ratings specify 36V between V+ and V–; exceeding this risks permanent damage. For reliable operation at elevated temperatures or heavy loads, thermal calculations must confirm junction temperature remains below 150°C.
Does LT1211CN8#PBF support true single-supply operation with input and output referenced to ground?
Yes, LT1211CN8#PBF supports true single-supply operation: its input common-mode range includes ground (V–), and its output swings to within 3mV of V– while sinking current. This allows direct interfacing with ground-referenced sensors and ADCs without level-shifting circuitry-confirmed in both 3.3V and 5V single-supply electrical characteristics tables.
What is the guaranteed settling time for LT1211CN8#PBF at 0.01% accuracy?
The LT1211CN8#PBF guarantees 900ns settling time to 0.01% for a 2V output step under standard test conditions (AV = 1, RL = 500Ω, TA = 25°C). This specification is explicitly listed in the "5V Electrical Characteristics" table and applies across the full –40°C to +85°C operating range, making it suitable for high-speed data acquisition systems.
Can LT1211CN8#PBF drive a 500Ω load effectively?
Yes, LT1211CN8#PBF is rated for ±20mA minimum output current, enabling direct drive of 500Ω loads. At ISINK = 15mA, the output remains within 0.5V of V–; at ISOURCE = 15mA, it stays within 0.4V of V+. These values are verified in the 5V and ±15V electrical characteristics tables and confirmed by thermal derating guidelines in the datasheet's Power Dissipation section.
Is LT1211CN8#PBF pin-compatible with other dual op amps in 8-pin DIP packages?
No, LT1211CN8#PBF is not pin-compatible with industry-standard dual op amps (e.g., LM358, TL072, OP27) due to its unique pin 4 (V–) and pin 5 (V+) assignment-standard dual op amps place power pins at pins 4 and 8. LT1211CN8#PBF follows Linear's proprietary dual-amplifier pinout: pins 1–3 and 6–8 are signal I/O, with V– at pin 4 and V+ at pin 5. PCB layout must follow the N8 package diagram shown in the datasheet.
LT1211CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 7V/µs
- Gain Bandwidth Product:
- 14 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1.8mA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1211CN8#PBF FAQ
1.How can I place an order for LT1211CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1211CN8#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 LT1211CN8#PBF reliable?
The price and inventory of LT1211CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1211CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1211CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1211CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1211CN8#PBF?
LT1211CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1211CN8#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 LT1211CN8#PBF?
For technical support, including LT1211CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1211CN8#PBF requirements.
6.How does Aetrix verify that LT1211CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1211CN8#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 LT1211CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1211CN8#PBF?
All LT1211CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1211CN8#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 LT1211CN8#PBF part is unused and in its original packaging.
Return procedure for LT1211CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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