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Analog Devices Inc. LT1633CS#TRPBF
- Part No.:
- LT1633CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1633CS#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:787
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Product details
Overview
LT1633CS#TRPBF 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 4.3mA supply current per amplifier. It operates from 2.7V single supply or ±15V dual supply, delivers ±35mA output drive, and achieves 1350µV max input offset voltage - enabling high-fidelity signal conditioning in battery-powered instrumentation and data acquisition systems.
For engineers reviewing the LT1633CS#TRPBF datasheet, LT1633CS#TRPBF pinout, LT1633CS#TRPBF application, or LT1633CS#TRPBF equivalent, key selection criteria include guaranteed rail-to-rail I/O swing at 3V, channel-to-channel matching over –40°C to 85°C, low 12nV/√Hz input noise, and SO-14 package thermal resistance of 150°C/W for thermally constrained PCB layouts.
Technical Context
The LT1633CS#TRPBF employs dual-input-stage architecture: PNP differential pair active for VCM = V– to ~1.5V below V+, and NPN pair active near V+, enabling seamless rail-to-rail common-mode operation. Its complementary bipolar process ensures matched AC/DC performance across all four amplifiers.
Output stage uses complementary common-emitter transistors Q14/Q15 with local feedback capacitors C1/C2 to maintain low output impedance up to 10MHz while supporting 25mA sink/source into 500Ω loads without saturation - critical for driving SAR ADC inputs and active filter stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz - supports stable unity-gain buffer designs up to 45MHz or closed-loop gains of 10 at 4.5MHz. |
| Slew Rate | 45V/µs - enables full-scale 10V step response in ≤222ns, suitable for fast-settling DAC output buffers. |
| Input Offset Voltage | 1350µV max - ensures ≤0.0135% gain error in 10V-range precision measurement front-ends. |
| Supply Range | 2.7V to ±15V - allows direct interface with 3.3V microcontrollers and legacy ±12V analog subsystems. |
| Output Drive Current | ±35mA min - drives 500Ω loads to rail without clipping, eliminating need for external boost stages. |
| Input Noise Density | 12nV/√Hz @ 1kHz - contributes <1.2µV RMS noise in 10kHz bandwidth, preserving SNR in sensor signal chains. |
| Common-Mode Rejection | 82dB min (±15V) - suppresses supply ripple and ground bounce in mixed-signal PCBs. |
Pinout & Package
LT1633CS#TRPBF is housed in a 14-pin plastic SOIC (SO-14) package with standard quad op amp pinout and θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - capable of swinging within 16mV of rails at no load, 1.2V at 25mA sink. |
| 2 | –IN A | Inverting input of Amp A - biased with ±2.2µA max input bias current, polarity depends on VCM. |
| 3 | +IN A | Non-inverting input of Amp A - rail-to-rail common-mode range supports direct sensor interfacing. |
| 4 | V+ | Positive supply - accepts 2.7V to +15V (single) or +15V (dual); internal protection diodes clamp overvoltage. |
| 5 | +IN B | Non-inverting input of Amp B - matches Amp A's DC specs; channel-to-channel VOS match ≤2300µV. |
| 6 | –IN B | Inverting input of Amp B - identical bias behavior to Pin 2; differential input protected to ±1.4V. |
| 7 | OUT B | Amplifier B output - electrically isolated from OUT A; 110dB channel separation at 10kHz. |
| 8 | V– | Negative supply - accepts 0V (single-supply) or –15V; reverse-biased output diodes connect here. |
| 9 | OUT D | Amplifier D output - shares same SO-14 thermal profile as Pins 1/7/13; layout symmetry aids thermal uniformity. |
| 10 | –IN D | Inverting input of Amp D - matched to Amp C per Note 5; supports precision differential receiver topologies. |
| 11 | +IN D | Non-inverting input of Amp D - rail-to-rail input enables true zero-input-bias current summing nodes. |
| 12 | V+ | Positive supply (redundant connection) - required for SO-14 mechanical stability; must be tied to Pin 4. |
| 13 | OUT C | Amplifier C output - fully specified for –40°C to 85°C; supports simultaneous multi-channel acquisition. |
| 14 | +IN C | Non-inverting input of Amp C - referenced to same VCM range as Pins 3/5/11; enables synchronous sampling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Operates with VCM from V– to V+ and VOUT within 16mV of rails - eliminates level-shifting in 3.3V systems. |
| Dual-input-stage architecture | Seamless handoff between PNP/NPN input pairs ensures flat CMRR >80dB across full supply range. |
| Low 12nV/√Hz input noise | Enables sub-16-bit ENOB in 100kHz bandwidth sensor interfaces without external filtering. |
| 4.3mA supply current per amplifier | Supports four independent channels in <18mA total - ideal for space-constrained portable medical devices. |
| ±35mA output drive | Drives 500Ω loads to full scale at ±15V without external transistors - reduces BOM count in analog output modules. |
| 150°C/W thermal resistance (SO-14) | Allows 0.56W total dissipation at 43°C ambient - validated for continuous operation in industrial control enclosures. |
Applications
| Active Filters | Rail-to-Rail Buffer Amplifiers |
|---|---|
Use Scenario: 4th-order Butterworth anti-aliasing filter preceding a 1MSPS SAR ADC in portable test equipment. IC Role / Device Role / Timing Role: Quad amplifier implements two 2-pole Sallen-Key stages with matched GBW and phase margin. Use Value: 45MHz GBW ensures <0.1dB passband ripple to 100kHz; rail-to-rail output drives ADC reference input directly. | Use Scenario: Isolating high-impedance pH sensor electrodes from noisy digital circuitry in water quality monitors. IC Role / Device Role / Timing Role: Unity-gain follower on each channel provides 1012Ω input impedance and 500Ω drive capability. Use Value: 1350µV max VOS limits measurement error to <0.14% of 14pH range; 12nV/√Hz noise preserves resolution. |
| Driving A/D Converters | Battery-Powered Systems |
Use Scenario: Driving multiplexed 16-bit sigma-delta ADC inputs in industrial process controllers. IC Role / Device Role / Timing Role: Four independent buffers condition thermocouple, RTD, strain gauge, and voltage inputs simultaneously. Use Value: Channel separation >110dB prevents crosstalk between 0–10V and ±10V input ranges; 4.3mA/channel enables 8-hour runtime on 2000mAh Li-ion. | Use Scenario: Signal conditioning front-end in handheld gas chromatography analyzers powered by 3.7V Li-ion cells. IC Role / Device Role / Timing Role: Quad op amp performs low-noise amplification, level shifting, and anti-alias filtering across four detector channels. Use Value: 2.7V minimum supply allows operation down to 3.2V cell voltage; rail-to-rail I/O maximizes dynamic range from 3.3V supply. |
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 7.5MHz GBW, 0.75V/µs slew rate, but 10µV max VOS and 0.1µV/°C drift. | Better DC precision for DC-coupled weigh scales; insufficient speed for >100kHz active filters. | Select OP4177ARUZ when ultra-low offset drift dominates over bandwidth requirements. |
| TLV9064IDR | Higher 10MHz GBW, 6.5V/µs slew, but only 1.8V to 5.5V supply range and 1.6mV max VOS. | Optimized for 3.3V IoT sensors; lacks ±15V compatibility and rail-to-rail input at 5.5V. | Select TLV9064IDR for cost-sensitive, low-voltage consumer electronics where dual-supply operation is unnecessary. |
Compared with OP4177ARUZ and TLV9064IDR, the LT1633CS#TRPBF uniquely balances 45MHz bandwidth, rail-to-rail I/O at 2.7V–±15V, and 1350µV offset - making it the only option for wide-supply, high-speed precision applications requiring four matched channels in SO-14.
Availability
LT1633CS#TRPBF is available at Aetrix Electronics and suitable for active filters, rail-to-rail buffering, A/D converter driving, and battery-powered instrumentation requiring stable component supply across industrial temperature ranges.
Supply support for LT1633CS#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 high-performance analog portfolio, emphasizing precision, speed, and reliability in signal chain ICs.
The LT1633CS#TRPBF belongs to Linear's rail-to-rail precision op amp family, designed specifically for high-fidelity analog signal conditioning in instrumentation, medical, and industrial control systems where wide supply range and quad-channel matching are essential.
FAQ
What is the maximum operating temperature range for the LT1633CS#TRPBF?
The LT1633CS#TRPBF is specified for operation from –40°C to +85°C. This extended industrial temperature range is validated per the datasheet's Note 4, with electrical characteristics guaranteed across this span including input offset voltage, CMRR, and output drive capability - ensuring reliable performance in outdoor environmental sensors and factory-floor PLC modules where ambient temperatures fluctuate widely.
Does the LT1633CS#TRPBF support true rail-to-rail input at 3V supply?
Yes, the LT1633CS#TRPBF supports rail-to-rail input common-mode range at 3V single supply, meaning VCM extends from V– (0V) to V+ (3V). This is confirmed in the Electrical Characteristics table under "Input Common Mode Range Includes Both Rails" and verified in Figure 1's dual-input-stage schematic - enabling direct connection of 0–3V sensor outputs without external level-shifting circuitry in the LT1633CS#TRPBF design.
What is the short-circuit current limit of the LT1633CS#TRPBF output stage?
The LT1633CS#TRPBF output stage has a short-circuit current limit of ±35mA minimum at ±15V supplies and ±26mA at 3V supply, as specified in the Electrical Characteristics table under "ISC Short-Circuit Current". This robust drive capability allows the LT1633CS#TRPBF to directly interface with low-impedance loads such as 500Ω ADC reference inputs or 100Ω transmission lines without external current-boosting components.
How does the LT1633CS#TRPBF handle capacitive loads in unity-gain configurations?
The LT1633CS#TRPBF can drive up to 200pF capacitive loads stably on ±15V supplies in unity-gain configuration, but capacitive load tolerance drops to <100pF on 3V supply. For larger loads, a 20Ω–50Ω isolation resistor must be placed between the LT1633CS#TRPBF output and the capacitor - maintaining feedback from the amplifier output to preserve phase margin and prevent oscillation per the Applications Information section.
Is the LT1633CS#TRPBF pin-compatible with other quad op amps in SO-14 packages?
The LT1633CS#TRPBF uses the industry-standard quad op amp pinout for SO-14 packages (Pin 1 = OUT A, Pin 2 = –IN A, etc.), matching pin assignments of LM324, TL074, and OP484. However, due to its rail-to-rail input architecture and higher supply current, direct substitution requires verification of VCM range, quiescent power, and stability with existing feedback networks - the LT1633CS#TRPBF is not a drop-in replacement without circuit review.
LT1633CS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT1633CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1633CS#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 LT1633CS#TRPBF reliable?
The price and inventory of LT1633CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1633CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1633CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1633CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1633CS#TRPBF?
LT1633CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1633CS#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 LT1633CS#TRPBF?
For technical support, including LT1633CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1633CS#TRPBF requirements.
6.How does Aetrix verify that LT1633CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1633CS#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 LT1633CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1633CS#TRPBF?
All LT1633CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1633CS#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 LT1633CS#TRPBF part is unused and in its original packaging.
Return procedure for LT1633CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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