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Analog Devices Inc. LT1633CS#PBF
- Part No.:
- LT1633CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1633CS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
LT1633CS#PBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input and output precision operational amplifier with 45MHz gain-bandwidth product, 45V/µs slew rate, and ±15V or 2.7V–36V single/dual supply operation. It delivers 35mA minimum output drive, 1350µV max input offset voltage, and operates across –40°C to 85°C - used in high-fidelity active filters and A/D converter front-ends.
For engineers reviewing the LT1633CS#PBF datasheet, LT1633CS#PBF pinout, LT1633CS#PBF application, or LT1633CS#PBF equivalent, key selection criteria include rail-to-rail I/O swing at low supply voltages, channel matching for multi-channel signal conditioning, thermal performance in SO-14 packages, and DC precision under varying common-mode conditions.
Technical Context
The LT1633CS#PBF employs dual complementary bipolar input stages (PNP and NPN) that auto-switch across the full rail-to-rail input range, enabling consistent CMRR >82dB and input offset shift ≤2600µV over VCM = V– + 0.2V to V+ – 0.1V. Its output uses complementary common-emitter stages with local feedback capacitors to sustain rail-to-rail swing while delivering ≥35mA into resistive loads.
It maintains specified AC performance (GBW ≥40MHz, SR ≥35V/µs at ±15V) and DC precision (VOS ≤3000µV, ∆VOS ≤2600µV) across –40°C to 85°C and supply ranges from 2.7V to ±15V. Channel separation exceeds 110dB at 10kHz, supporting tightly coupled quad-channel designs without crosstalk-induced error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz - supports stable unity-gain buffer or 10x gain up to 4.5MHz without phase margin erosion. |
| Slew Rate | 45V/µs - enables clean 10VPP output at 1MHz without slewing distortion in fast-settling data acquisition paths. |
| Input Offset Voltage (max) | 3000µV - ensures <0.03% gain error in 100mV full-scale sensor amplification with 10kΩ source impedance. |
| Output Drive Current | 35mA min - drives 100Ω loads directly or charges 1000pF sampling capacitors within 600ns settling time (0.01%). |
| Rail-to-Rail I/O | VIN = V– to V+, VOUT = V– + 16mV / V+ – 16mV - eliminates level-shifting circuitry in 3.3V or 5V battery-powered systems. |
| Supply Range | 2.7V to ±15V - operates from single-cell Li-ion (3.0V) to industrial ±12V rails without redesign. |
| Input Noise Density | 12nV/√Hz @ 1kHz - contributes <1.2µVRMS integrated noise in 10kHz bandwidth, suitable for µV-level transducer signals. |
Pinout & Package
LT1633CS#PBF is housed in a 14-pin plastic SOIC (SO-14) package with standard quad op amp pinout and θJA = 150°C/W. The package is RoHS-compliant and rated for –40°C to 85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives external load; rail-to-rail swing supports direct interface to SAR ADC reference buffers. |
| 2 (–IN A) | Inverting input A | Differential node for A channel; matched bias current minimizes offset error in transimpedance configurations. |
| 3 (+IN A) | Non-inverting input A | High-impedance node; PNP/NPN stage switching ensures stable bias across full supply range. |
| 4 (V+) | Positive supply rail | Accepts 2.7V–18V (single) or +15V (dual); decoupling required within 1cm for stability at >10MHz. |
| 5 (+IN B) | Non-inverting input B | Independent channel input; matched to A/C/D for common-mode rejection in instrumentation topologies. |
| 6 (–IN B) | Inverting input B | Paired with Pin 5; channel-to-channel VOS match ≤4000µV enables precision differential gain stages. |
| 7 (OUT B) | Amplifier B output | Electrically isolated from OUT A; 110dB channel separation prevents crosstalk in multi-channel filters. |
| 8 (OUT D) | Amplifier D output | Quad symmetry allows identical layout for all four channels; reduces layout-induced mismatch. |
| 9 (–IN D) | Inverting input D | Matches Pin 2/6/12; input capacitance 3pF enables stable 10MHz closed-loop operation with minimal feedback compensation. |
| 10 (+IN D) | Non-inverting input D | Same CMRR and offset drift as other inputs; supports synchronous sampling across four analog channels. |
| 11 (V–) | Negative supply rail | Accepts ground (single-supply) or –15V; reverse-biased protection diodes clamp output overdrive. |
| 12 (+IN C) | Non-inverting input C | Third channel input; PSRR match ≤101dB ensures uniform supply noise rejection across all amplifiers. |
| 13 (–IN C) | Inverting input C | Paired with Pin 12; ∆IB shift ≤5.6µA maintains accuracy when VCM sweeps across rails. |
| 14 (OUT C) | Amplifier C output | Final channel output; short-circuit current ±54mA allows safe fault handling without external current limiting. |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary input architecture | Seamless PNP/NPN stage handoff across VCM = V– to V+ eliminates crossover distortion and maintains CMRR >81dB. |
| Rail-to-rail output stage with local feedback | Complementary emitter followers + C1/C2 reduce high-frequency output impedance, enabling stable 200pF capacitive load drive at ±15V. |
| Matched quad topology | Channel-to-channel VOS match ≤4000µV and CMRR match ≤101dB support precision multi-channel gain blocks without per-channel trimming. |
| Overdrive protection network | Integrated D1–D4 cross-coupled diodes limit polarity reversal during input overvoltage; requires <5mA input current for reliable operation. |
| ESD-hardened design | 3kV HBM rating on all pins eliminates need for external TVS in board-level ESD zones per IEC 61000-4-2 Level 3. |
Applications
| Active Filters | Rail-to-Rail Buffer Amplifiers |
|---|---|
Use Scenario: 4th-order Butterworth anti-aliasing filter preceding a 16-bit SAR ADC in portable medical instrumentation. IC Role / Device Role / Timing Role: Quad op amp implements two 2-pole Sallen-Key stages; each LT1633CS#PBF channel provides gain, buffering, and precise pole placement. Use Value: 45MHz GBW and 45V/µs SR ensure <0.01% settling in <600ns, preserving ENOB across 100kHz input bandwidth. | Use Scenario: Single-supply 3.3V sensor signal conditioning chain requiring full dynamic range utilization. IC Role / Device Role / Timing Role: LT1633CS#PBF configured as unity-gain buffer between MEMS accelerometer and ADC input. Use Value: Rail-to-rail I/O eliminates level-shifting components, reducing BOM count and PCB area by 35% versus legacy rail-limited op amps. |
| Driving A/D Converters | Battery-Powered Systems |
Use Scenario: Driving multiplexed 12-bit ADC inputs in industrial PLC analog input modules. IC Role / Device Role / Timing Role: LT1633CS#PBF channels buffer and scale four independent 4–20mA loop signals before multiplexing. Use Value: 35mA output drive and 110dB channel separation prevent crosstalk-induced measurement errors during fast channel switching. | Use Scenario: Low-power signal chain in handheld gas detector using electrochemical sensors. IC Role / Device Role / Timing Role: LT1633CS#PBF operates from 3.0V Li-ion cell to amplify nA-level sensor currents with minimal quiescent power. Use Value: 4.95mA per amplifier supply current extends battery life to >12 months while maintaining 12nV/√Hz noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP4177ARUZ | Lower GBW (1.3MHz), lower noise (7.9nV/√Hz), higher precision (VOS max 60µV), but no rail-to-rail output. | Preferred for ultra-low-noise DC-coupled sensor interfaces where output swing beyond 1.2V from rails is acceptable. | Select OP4177ARUZ when sub-100µV offset and <1µVRMS integrated noise outweigh speed and rail-to-rail requirements. |
| TLV2464CDR | Lower GBW (6.4MHz), lower supply current (650µA), rail-to-rail I/O, but higher VOS (4500µV max) and slower SR (1.6V/µs). | Suitable for cost-sensitive, low-speed battery monitoring where 12-bit accuracy suffices and 45MHz bandwidth is unnecessary. | Choose TLV2464CDR only for non-critical signal paths where 45MHz bandwidth and 45V/µs SR are not required. |
Compared with OP4177ARUZ and TLV2464CDR, the LT1633CS#PBF uniquely balances high-speed rail-to-rail operation with precision DC specs - enabling single-chip solutions for wide-dynamic-range, multi-channel data acquisition without sacrificing settling time or output drive.
Availability
LT1633CS#PBF is available at Aetrix Electronics and suitable for active filters, rail-to-rail buffering, A/D converter driving, and battery-powered systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1633CS#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, serving industrial, automotive, communications, and healthcare markets.
The LT1633CS#PBF belongs to ADI's legacy Linear Technology precision op amp portfolio, engineered for demanding signal-chain applications requiring simultaneous high speed, rail-to-rail operation, and DC accuracy in compact SO-14 packages.
FAQ
What is the maximum operating temperature range for the LT1633CS#PBF?
The LT1633CS#PBF is specified for operation from –40°C to +85°C ambient temperature. Its SO-14 package has a junction-to-ambient thermal resistance of 150°C/W, and absolute maximum junction temperature is 150°C. Derating is required above 70°C ambient when dissipating >200mW per amplifier to maintain reliability.
Does the LT1633CS#PBF support true rail-to-rail input and output operation?
Yes, the LT1633CS#PBF supports true rail-to-rail input (VCM = V– to V+) and output (VOUT = V– + 16mV to V+ – 16mV, no load) across its full supply range (2.7V to ±15V). This is achieved via dual PNP/NPN input stages and complementary emitter-follower output stages.
What is the typical supply current per amplifier for the LT1633CS#PBF at 5V single supply?
At 5V single supply and 25°C, the LT1633CS#PBF draws 4.95mA per amplifier (typical), with a maximum of 6.2mA over temperature. Total device current is ~19.8mA typical for all four amplifiers, making it suitable for moderate-power signal chains where speed and precision are prioritized over ultra-low quiescent current.
Can the LT1633CS#PBF drive capacitive loads, and what is the recommended compensation?
Yes, the LT1633CS#PBF can drive up to 200pF capacitive loads stably at ±15V supplies in unity-gain configuration. At 3V supply, keep load capacitance below 100pF. For larger loads, add a 20Ω–50Ω isolation resistor between output and capacitor; feedback must remain connected directly to the op amp output pin.
How does the input stage switching affect offset voltage in the LT1633CS#PBF?
The LT1633CS#PBF uses PNP and NPN input pairs that switch at ~1.5V below V+. Input offset voltage changes at the transition point, but ∆VOS is guaranteed ≤2600µV over the full common-mode range (–40°C to 85°C), and CMRR remains >81dB, ensuring predictable error behavior in rail-to-rail applications.
LT1633CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 45V/µs
- Gain Bandwidth Product:
- 45 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.15 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4.6mA (x4 Channels)
- Current - Output / Channel:
- 70 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:
- 14-SO
LT1633CS#PBF FAQ
1.How can I place an order for LT1633CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1633CS#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 LT1633CS#PBF reliable?
The price and inventory of LT1633CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1633CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1633CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1633CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1633CS#PBF?
LT1633CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1633CS#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 LT1633CS#PBF?
For technical support, including LT1633CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1633CS#PBF requirements.
6.How does Aetrix verify that LT1633CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1633CS#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 LT1633CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1633CS#PBF?
All LT1633CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1633CS#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 LT1633CS#PBF part is unused and in its original packaging.
Return procedure for LT1633CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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