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Analog Devices Inc. LT1632CS8#PBF
- Part No.:
- LT1632CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1632CS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:783
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Product details
Overview
LT1632CS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail input and output precision operational amplifier optimized for high-speed, low-voltage signal conditioning. It delivers 45MHz gain-bandwidth product, 45V/µs slew rate, 4.3mA supply current per amplifier, ±15V or 2.7V–36V single/dual supply operation, and drives ≥35mA load current - enabling use in active filters, A/D driver stages, and battery-powered instrumentation.
For engineers reviewing the LT1632CS8#PBF datasheet, LT1632CS8#PBF pinout, LT1632CS8#PBF application, or LT1632CS8#PBF equivalent, key selection criteria include rail-to-rail I/O swing at 3V, input offset voltage ≤1350µV max over full temperature range, channel-to-channel matching, and SO-8 package thermal resistance (θJA = 190°C/W) for thermally constrained PCB layouts.
Technical Context
The LT1632CS8#PBF employs a dual-input-stage architecture: PNP differential pair active for VCM near V−, NPN pair active near V+, enabling true rail-to-rail common-mode input range without phase reversal. Its complementary bipolar process ensures matched AC/DC performance across channels.
Output stage uses rail-to-rail complementary common-emitter drivers with local feedback capacitors (C1/C2), delivering 35mA min sink/source while maintaining stability into 200pF loads at ±15V - though capacitive load limit reduces to 100pF at 3V supply due to reduced loop gain margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz - supports stable unity-gain buffer or G=10 amplification up to ~4.5MHz without peaking. |
| Slew Rate | 45V/µs - enables clean 10VPP output at 100kHz (0.01% settling) in noninverting configuration. |
| Input Offset Voltage | ≤1350µV max (–40°C to 85°C) - ensures <0.1% gain error in 12-bit precision systems with 5V full-scale. |
| Supply Range | 2.7V to ±15V - operates from single-cell Li-ion (3.0V) to industrial ±15V rails without redesign. |
| Output Drive Current | ≥35mA min - directly drives 100Ω loads or ADC reference buffers without external boost. |
| Input Noise Density | 12nV/√Hz @ 1kHz - maintains SNR >80dB in 20kHz audio paths with 1kΩ source impedance. |
| Common-Mode Rejection | ≥82dB (±15V) - suppresses supply ripple and ground bounce in mixed-signal sensor interfaces. |
Pinout & Package
LT1632CS8#PBF is housed in an 8-lead plastic SO (SO-8) package with standard dual op amp pinout and θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail swing, capable of sourcing/sinking ≥35mA. |
| 2 | –IN A | Inverting input of Amp A - high-impedance node; bias current polarity reverses with VCM. |
| 3 | +IN A | Non-inverting input of Amp A - matches –IN A in offset and CMRR; requires symmetrical source impedances. |
| 4 | V– | Negative supply rail - connects to ground (single supply) or negative voltage (dual supply); reverse diodes protect against output overdrive. |
| 5 | V+ | Positive supply rail - accepts 2.7V–36V total supply; power dissipation must be managed per θJA = 190°C/W. |
| 6 | OUT B | Amplifier B output - electrically isolated from OUT A; channel separation ≥110dB at 10kHz. |
| 7 | –IN B | Inverting input of Amp B - independent of Amp A; matched offset drift ≤15µV/°C. |
| 8 | +IN B | Non-inverting input of Amp B - identical DC/AC specs to +IN A; supports dual-channel instrumentation topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from V– to V+, eliminating level-shifting circuits in low-voltage sensor front-ends. |
| Output swing within 16mV of rails (no load) | Enables full dynamic range utilization in 3.3V or 5V ADC interfaces without headroom loss. |
| Input offset voltage match (A vs B) | ≤2300µV max (–40°C to 85°C) - critical for dual-op-amp difference amplifiers and I/V converters. |
| Overdrive protection with diode clamps | Prevents output polarity reversal when inputs exceed supplies by >700mV, provided input current ≤5mA. |
| ESD rating | 3kV HBM on all pins - withstands handling and board-level ESD events without external protection. |
Applications
| Active Filters | Rail-to-Rail Buffer Amplifiers |
|---|---|
Use Scenario: 4th-order Sallen-Key low-pass filter for anti-aliasing before 1MSPS SAR ADC in portable medical device. IC Role / Device Role / Timing Role: Dual amplifier implements two 2-pole stages; rail-to-rail I/O preserves 0–3.3V signal integrity across full bandwidth. Use Value: 45MHz GBW ensures filter cutoff accuracy to ±0.5% at 100kHz; 12nV/√Hz noise avoids degrading 12-bit ENOB. | Use Scenario: Isolation buffer between high-impedance pH electrode and 16-bit delta-sigma ADC in industrial water quality monitor. IC Role / Device Role / Timing Role: Noninverting unity-gain follower with matched input bias currents minimizes offset drift from electrode leakage. Use Value: Input bias current shift <4.4µA over rail-to-rail VCM prevents baseline drift; 35mA drive handles 10nF cable capacitance. |
| Driving A/D Converters | Battery-Powered Systems |
Use Scenario: Driving input of 14-bit successive-approximation ADC in handheld test equipment powered by 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Single-supply 3V operation with rail-to-rail output swing ensures full 0–3.3V ADC code utilization. Use Value: 45V/µs slew rate settles 2V step in <400ns to 0.01%, meeting 1MSPS timing; 4.3mA quiescent current extends battery life. | Use Scenario: Signal conditioning for piezoelectric vibration sensor in wireless predictive maintenance node operating 5 years on CR2032 coin cell. IC Role / Device Role / Timing Role: Low-noise preamplifier with shutdown control; enabled only during periodic sensor read cycles. Use Value: 12nV/√Hz input noise preserves micro-g resolution; 2.7V minimum supply allows operation down to battery EOL (2.8V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Zero-drift architecture; 1µV max VOS, but only 2.5MHz GBW and 1V/µs slew rate. | Better DC precision for µV-level sensor offsets; insufficient speed for >100kHz active filters or fast-settling ADC drivers. | Select AD8628ARZ when ultra-low drift dominates over bandwidth; avoid when >5MHz closed-loop gain required. |
| OPA2333AIDR | Zero-drift, 350kHz GBW, 0.16V/µs slew rate, 17µA supply current per amp. | Superior VOS TC (0.02µV/°C) and lower power, but cannot support 100kHz+ signal chains or 35mA loads. | Choose OPA2333AIDR for ultra-low-power, high-precision DC-coupled sensors; not suitable for dynamic signal acquisition. |
Compared with AD8628ARZ and OPA2333AIDR, LT1632CS8#PBF trades ultra-low offset drift for 45× higher bandwidth and 280× faster slew rate - making it uniquely suited for precision analog signal paths requiring both speed and rail-to-rail operation at 3V–36V.
Availability
LT1632CS8#PBF is available at Aetrix Electronics and suitable for active filters, A/D converter driving, and battery-powered instrumentation requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized channels.
Supply support for LT1632CS8#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 high-performance analog portfolio, emphasizing precision, speed, and reliability in signal conditioning ICs.
The LT1632 series belongs to Linear's precision high-speed op amp product line, designed specifically for applications demanding rail-to-rail I/O, wide supply range, and robust DC accuracy in space-constrained industrial and portable systems.
FAQ
What is the maximum supply voltage for LT1632CS8#PBF?
The absolute maximum total supply voltage (V+ to V−) for LT1632CS8#PBF is 36V. It operates across a wide range from 2.7V single supply up to ±15V dual supply. Exceeding 36V risks permanent damage per Absolute Maximum Ratings. Derating is recommended above 30V to maintain junction temperature below 150°C given its SO-8 θJA of 190°C/W.
Does LT1632CS8#PBF support true rail-to-rail input at 3V supply?
Yes, LT1632CS8#PBF supports true rail-to-rail input common-mode range at 3V supply - inputs function from V− (0V) to V+ (3V) without phase reversal or increased offset. This is enabled by its dual-input-stage architecture (PNP/NPN pairs), verified in Electrical Characteristics tables for VS = 3V conditions and confirmed in Typical Performance plots (e.g., Input Bias Current vs Common Mode Voltage).
What is the typical input offset voltage drift over temperature for LT1632CS8#PBF?
The typical input offset voltage drift (VOS TC) for LT1632CS8#PBF is 8–15µV/°C over the full –40°C to 85°C range, with a tighter 2.5–7µV/°C spec when VCM is near V+ – 0.1V. This drift is measured and guaranteed per Note 3 in the datasheet, and impacts system accuracy in temperature-varying environments - e.g., adding ±0.15mV error over a 10°C ambient shift.
Can LT1632CS8#PBF drive a 1000pF capacitive load?
No, LT1632CS8#PBF is not unconditionally stable into 1000pF. At ±15V supply, it supports ≤200pF in unity-gain; at 3V supply, limit is ≤100pF. Driving 1000pF requires isolation: add a 20–50Ω series resistor between OUT and the load, with feedback taken from the amplifier output (not the load side) to preserve stability and bandwidth.
Is LT1632CS8#PBF pin-compatible with standard dual op amp footprints?
Yes, LT1632CS8#PBF uses the industry-standard SO-8 dual op amp pinout (pin 1 = OUT A, pin 2 = –IN A, pin 3 = +IN A, pin 4 = V–, pin 5 = V+, pin 6 = OUT B, pin 7 = –IN B, pin 8 = +IN B), matching LM358, TL072, and AD822 footprints. No PCB layout change is needed for drop-in replacement where electrical specs align.
LT1632CS8#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:
- 45V/µs
- Gain Bandwidth Product:
- 45 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.15 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 4.6mA (x2 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:
- 8-SO
LT1632CS8#PBF FAQ
1.How can I place an order for LT1632CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1632CS8#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 LT1632CS8#PBF reliable?
The price and inventory of LT1632CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1632CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1632CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1632CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1632CS8#PBF?
LT1632CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1632CS8#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 LT1632CS8#PBF?
For technical support, including LT1632CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1632CS8#PBF requirements.
6.How does Aetrix verify that LT1632CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1632CS8#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 LT1632CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1632CS8#PBF?
All LT1632CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1632CS8#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 LT1632CS8#PBF part is unused and in its original packaging.
Return procedure for LT1632CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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