LT1633CS - 45MHz, 45V/us Quad Rail-to-Rail Op Amp | ADI
MPN: LT1633CS ✓ ActiveLT1633CS Overview
An operational amplifier is a high-gain, feedback-controlled analog building block used to amplify, buffer, filter, compare, or drive signals within an electronic system. The LT1633 belongs to the operational amplifier, analog signal-conditioning, and semiconductor hierarchy. Its quad configuration places four amplifiers in one package, reducing board area in designs requiring multiple high-speed analog channels.
The LT1633's principal verified performance features are its 45 MHz gain-bandwidth product, 45 V/us slew rate, and rail-to-rail input and output operation. The reported maximum input offset voltage is 2750 uV. These characteristics make the device relevant to precision signal conditioning, low-level instrumentation, data acquisition, and active filtering, where the required bandwidth and output-drive capability are more important than minimum quiescent current.
The LT1633 uses a bipolar process and is available as a standard quad 14-pin plastic SO package. Its rail-to-rail input stage supports signals approaching either supply rail, while the rail-to-rail output stage provides improved output range compared with a conventional complementary output restricted by saturation headroom. One verified distributor listing additionally identifies operation at plus or minus 15 V, corresponding to 30 V total supply span.
Typical uses include four-channel sensor conditioning, precision filter implementations, instrumentation amplifiers, active analog signal-processing chains, and general-purpose analog buffering. The 45 MHz bandwidth provides useful headroom for moderate-frequency closed-loop designs, while the 45 V/us slew rate allows larger signal transitions without excessive distortion. Stable operation still depends on correct feedback topology, output-load limits, supply bypassing, and the applicable datasheet gain and phase-margin guidance.
Designers should place input and output decoupling capacitors close to the device, verify source and sink current for the selected load, and confirm that the required output voltage remains inside the available rail-to-rail range. Input and output capacitance, noise, offset, and stability behavior should be evaluated for the selected noise gain and operating frequency rather than inferred solely from the 45 MHz gain-bandwidth figure.
This page consolidates verified manufacturer and distributor information, exact product identifiers, lifecycle status, application guidance, and design considerations for the LT1633CS. It also distinguishes documented performance from unavailable pricing, environmental, and pin-level data so engineers can make traceable sourcing and design decisions.
Drop-in alternatives for LT1633CS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
LT1633IS
✅ Drop-InContact for price
View Datasheet →LT1634CS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT1635CS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT1636CS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT1637CS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT1633CS Maximum Ratings & Electrical Characteristics
| Number of Amplifiers | 4 circuits |
| Amplifier Type | General-purpose precision operational amplifier |
| Gain-Bandwidth Product | 45 MHz |
| Slew Rate | 45 V/us |
| Input Type | Rail-to-rail |
| Output Type | Rail-to-rail |
| Input Offset Voltage | 2750 uV maximum |
| Supply Voltage | Plus or minus 15 V (30 V total) |
| Process Technology | Bipolar |
| Package | 14-pin SOIC, 3.90 mm body width |
| Shipping Package | Tube |
| Lifecycle Status | Production |
LT1633CS tube Pin Configuration Guide
Pin configuration for LT1633CS (tube package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LT1633CS.
Refer to the datasheet for full pin configuration.
Typical Applications
LT1633CS is suitable for 6 applications: Precision Sensor Signal Conditioning, Active Filtering and Frequency Response, Data Acquisition Front Ends, Industrial Control and Measurement Loops, Audio and Low-Level Analog Buffering, Portable and Battery-Powered Analog Systems.
Precision Sensor Signal Conditioning
The LT1633CS fits four-channel sensor conditioning because it combines a verified 45 MHz gain-bandwidth product with rail-to-rail input and output operation. Each amplifier can amplify a low-level sensor signal, provide active filtering, or buffer an ADC input while operating close to the supply rails. The 45 V/us slew rate preserves large-signal fidelity in moderate-frequency measurement systems, and the reported maximum input offset voltage of 2750 uV provides a documented starting point for error budgeting. Engineers should still account for offset drift, bias current, noise, source impedance, and ADC input range. Because this is a quad device, four conditioned channels can be implemented in one 14-pin SOIC, reducing footprint compared with separate single amplifiers.
Recommended
Active Filtering and Frequency Response
The LT1633CS is appropriate for active filters requiring more bandwidth than conventional general-purpose amplifiers. Its 45 MHz gain-bandwidth product leaves useful loop-gain margin in moderate-frequency precision-filter designs, while the 45 V/us slew rate supports faster signal transitions with reduced slew-related distortion. Rail-to-rail input and output operation can improve signal swing in low-voltage systems where a conventional amplifier loses headroom near a supply rail. Filter stability still depends on noise gain, component tolerances, capacitive loading, and the selected topology, so the manufacturer datasheet should be consulted for recommended configurations. The quad package also permits implementation of cascaded second- or fourth-order sections within a compact instrumentation design.
Recommended
Data Acquisition Front Ends
The LT1633CS can support data-acquisition front ends that require simultaneous conditioning of four inputs. The verified 45 MHz bandwidth accommodates fast acquisition and anti-alias filtering, while the 45 V/us slew rate helps reproduce waveforms with meaningful amplitude and frequency content. Rail-to-rail inputs are useful when sensor outputs occupy much of the available supply range, and rail-to-rail outputs increase the usable range when driving the input of an ADC or sampling circuit. The device does not replace an ADC's input-sampling architecture, but it can provide gain and isolation immediately before conversion. Designers should verify ADC settling requirements, input capacitance, common-mode range, offset correction, and the required analog bandwidth for each input before finalizing the signal chain.
Recommended
Industrial Control and Measurement Loops
The LT1633CS suits precision control and measurement loops that need four amplified channels in industrial equipment. Its 45 MHz gain-bandwidth product and 45 V/us slew rate allow the amplifiers to handle feedback-control signals and sensor outputs more effectively than low-speed general-purpose parts, while the bipolar process and rail-to-rail operation broaden the usable signal range. The amplifier may scale an error signal, buffer a reference-derived measurement, or drive an analog control input. Because the supplied data does not include the complete temperature rating, noise, bias-current, or output-current limits, those specifications must be confirmed for each industrial temperature and load condition. Suitable PCB design also requires short feedback paths and effective supply decoupling.
Recommended
Audio and Low-Level Analog Buffering
The LT1633CS can be used for audio or low-level analog buffering when the signal path requires more bandwidth and slew capability than a conventional LM324-class device. Its verified 45 MHz gain-bandwidth product and 45 V/us slew rate provide the headroom needed to preserve moderate-frequency transients, while rail-to-rail output operation can improve available signal swing. The quad arrangement is useful for stereo or multi-channel bias, summing, and gain stages. However, the supplied data does not establish THD, noise density, output-current capability, or output impedance, so it cannot establish that this part is superior for audio. Those parameters must be reviewed in the manufacturer datasheet, and stability must be evaluated for the exact gain and load.
Recommended
Portable and Battery-Powered Analog Systems
The LT1633CS may serve in portable or battery-powered analog systems where four high-speed signal paths are required in a small package. Rail-to-rail input and output operation increases usable signal range in low-voltage systems, and the 14-pin SOIC avoids the footprint demands of four separate amplifiers. The 45 MHz bandwidth and 45 V/us slew rate can be valuable when sensor outputs, filtering, and conversion must operate at moderate frequencies. However, no verified quiescent-current or operating-supply data was supplied, so battery-life suitability cannot be inferred from the high-speed specifications alone. Engineers should compare current consumption, output loading, noise, and the complete supply range before selecting it for portable equipment. Rail-to-rail behavior also requires attention near supply limits.
Recommended
Recommended Products Summary
Engineering reference data for LT1633CS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LT1633IS | LT1634CS | LT1635CS | LT1636CS | LT1637CS |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Gain-Bandwidth Product | 45 MHz | 45 MHz | 44 MHz | 44 MHz | 44 MHz | 44 MHz |
| Slew Rate | 45 V/us | 45 V/us | 35 V/us | 35 V/us | 35 V/us | 35 V/us |
Key Differentiators
- Higher verified slew rate than the same-family alternatives (vs LT1634CS)
- Direct LT1633 family option for industrial ordering (vs LT1633IS)
- Four high-speed amplifiers in one package (vs LM324D)
Design Notes
Place the supply-bypass capacitors immediately adjacent to the appropriate power and ground pins, and keep the feedback-resistor network close to the amplifier inputs. The verified 45 MHz gain-bandwidth product means that even a modest parasitic trace can become significant at higher closed-loop bandwidth. Route outputs away from sensitive input nodes and connect analog ground return current directly to the device-side ground rather than through shared high-current paths.
Do not equate the 45 MHz gain-bandwidth product with a guaranteed 45 MHz usable bandwidth in every circuit. Closed-loop bandwidth depends on noise gain and feedback topology, while the 45 V/us slew rate applies to the maximum output transition rate. Check the manufacturer guidance for stability, capacitive loading, output current, and input/output ranges, particularly near the supply rails where rail-to-rail behavior can alter expected headroom.
For sensor or ADC input stages, verify total input capacitance, source impedance, noise gain, and the acquisition system's settling requirements. Rail-to-rail input helps with low-voltage signals, but it does not eliminate input offset, bias-current, noise, or common-mode errors. Use the reported 2750 uV maximum input offset voltage as one error-budget component and confirm the complete AC and DC specifications from the manufacturer datasheet before setting measurement resolution.
Compliance Information
The supplied web results identify the LT1633CS#PBF ordering code and official Analog Devices documentation but do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance. These fields remain unknown rather than being inferred from the orderable code.
