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Analog Devices Inc. LT1801CS8#TRPBF
- Part No.:
- LT1801CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1801CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,598
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Product details
Overview
LT1801CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail input/output precision operational amplifier optimized for low-voltage, high-speed signal conditioning. It delivers 80MHz gain bandwidth, 25V/µs slew rate, and <350µV max input offset voltage at 3V–12.6V supply, enabling high-fidelity buffering in data acquisition and sensor front-ends.
For engineers reviewing the LT1801CS8#TRPBF datasheet, LT1801CS8#TRPBF pinout, LT1801CS8#TRPBF application, or LT1801CS8#TRPBF equivalent, key selection criteria include rail-to-rail swing within 20mV of rails, 2mA/amplifier quiescent current, ±5V/±2.5V split-supply compatibility, and SO-8 package thermal performance (θJA = 190°C/W).
Technical Context
The LT1801CS8#TRPBF uses a dual-input-stage architecture-PNP pair active from V– to ~1.2V below V+, NPN pair active near V+-enabling seamless rail-to-rail common-mode input range (V– to V+). Its complementary common-emitter output stage supports rail-to-rail output swing with 50mA typical short-circuit current capability.
It operates across ±2.5V to ±5V or single 2.3V–12.6V supplies, maintaining 80MHz GBW and 105dB CMRR over –40°C to 85°C. Input bias current remains <250nA across 0.2V above V– to 1.2V below V+, critical for high-impedance transducer interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 80MHz - enables stable unity-gain buffer operation up to 8MHz with 0.1% settling accuracy |
| Slew Rate | 25V/µs - supports 4VP-P output at 1MHz without slewing distortion |
| Input Offset Voltage | 350µV max - ensures ≤0.7mV error in 2V full-scale 12-bit ADC driver applications |
| Supply Current | 2mA per amplifier - allows dual-channel operation under 4.5mA total at 5V, suitable for battery-powered systems |
| Output Swing | Within 20mV of rails - maximizes dynamic range in 3.3V systems, delivering >3.26VP-P output |
| Common-Mode Rejection | 105dB typ - suppresses >300µV of power-supply ripple in single-supply sensor amplifiers |
| Operating Temperature | –40°C to +85°C - qualified for industrial control and automotive cabin electronics |
Pinout & Package
LT1801CS8#TRPBF is housed in an 8-lead plastic SO (SO-8) package with exposed pad internally connected to V–; PCB connection to V– trace recommended for thermal enhancement (θJA = 190°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives loads up to 50mA; rail-to-rail swing supports direct interface to SAR ADC reference buffers |
| 2 (–IN A) | Inverting input A | Differential pair node; matched to +IN A for <280µV channel-to-channel offset |
| 3 (+IN A) | Non-inverting input A | High-impedance node; bias current <250nA enables >1MΩ source impedance use |
| 4 (V–) | Negative supply / ground | Internally connects to exposed pad; tie to large copper pour for thermal management |
| 5 (V+) | Positive supply | Accepts 2.3V–12.6V single or ±2.5V/±5V split supplies; PSRR = 97dB minimizes supply noise coupling |
| 6 (OUT B) | Amplifier B output | Independent output; enables dual-path signal conditioning without crosstalk (CMRR match = 105dB) |
| 7 (–IN B) | Inverting input B | Matched to +IN B; supports differential input stages with <280µV inter-channel offset |
| 8 (+IN B) | Non-inverting input B | Same bias current and noise specs as +IN A; enables synchronous dual-sensor readout |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 3.3V/5V supply rails in single-supply systems, eliminating level-shifting circuitry |
| 80MHz gain bandwidth | Supports closed-loop gain ≥10 at 8MHz, suitable for anti-aliasing filters preceding 10MSPS ADCs |
| Low 8.5nV/√Hz input noise | Preserves SNR in low-level sensor amplification (e.g., thermocouples, strain gauges) without added filtering |
| 25V/µs slew rate | Ensures <0.01% settling in <300ns for 2V step inputs, meeting timing requirements of high-speed data converters |
| 2.3V minimum supply voltage | Permits operation from single Li-ion cell (3.0–4.2V) or regulated 2.5V/3.3V rails in portable instrumentation |
Applications
| Active Filter Design | ADC Driver Circuit |
|---|---|
Use Scenario: Implementing 4th-order Butterworth low-pass filter at 1MHz for anti-aliasing prior to 10MSPS ADC sampling. IC Role / Device Role / Timing Role: Dual op-amp topology provides two identical gain stages with matched GBW and phase margin for precise pole placement. Use Value: 80MHz GBW and 105dB CMRR ensure <0.05dB passband ripple and >60dB stopband attenuation at 2× cutoff frequency. | Use Scenario: Driving SAR ADC input with 12-bit resolution and 1MSPS sampling rate in medical ECG front-end. IC Role / Device Role / Timing Role: Rail-to-rail output buffers analog sensor signal while maintaining DC accuracy during fast acquisition windows. Use Value: <350µV offset and 25V/µs slew rate limit code errors to <0.5 LSB; 2mA quiescent current extends battery life. |
| Rail-to-Rail Sensor Interface | Video Line Driver |
Use Scenario: Amplifying output of 0–2.5V pressure transducer in industrial PLC analog input module. IC Role / Device Role / Timing Role: Single-supply amplifier referenced to 1.25V mid-rail, providing gain and level-shifting before ADC. Use Value: Input common-mode range includes both rails (0–5V), eliminating external bias resistors; 105dB CMRR rejects 50/60Hz line noise. | Use Scenario: Driving 75Ω coaxial video line in security camera analog output stage. IC Role / Device Role / Timing Role: Unity-gain buffer with low distortion (<–75dBc at 500kHz) and fast settling for composite NTSC signals. Use Value: 0.35% differential gain and 0.4° differential phase meet broadcast video fidelity standards; 50mA output drives long cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ-REEL7 | Zero-drift architecture; 1µV max offset, but only 2.5MHz GBW and 1V/µs slew rate | Better DC precision for µV-level sensor signals; insufficient speed for >100kHz closed-loop gain ≥10 | Select when ultra-low drift dominates over bandwidth; avoid for video or fast-settling ADC drivers |
| OPA2350UA/2K5 | Higher 38MHz GBW and 22V/µs slew, but 1.8mV max offset and 4.25mA supply current per amp | Superior speed for 10MHz small-signal paths; higher offset limits 14-bit+ precision; higher IQ reduces battery runtime | Select for high-frequency AC-coupled signal chains where DC accuracy is secondary to bandwidth |
Compared with AD8628ARZ-REEL7, LT1801CS8#TRPBF trades ultra-low offset for 32× higher bandwidth and 25× faster slew-critical for time-domain fidelity. Versus OPA2350UA/2K5, it halves supply current while maintaining 80MHz GBW, making it optimal for power-constrained, wideband dual-channel systems.
Availability
LT1801CS8#TRPBF is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and test equipment requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LT1801CS8#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, inheriting its high-performance analog portfolio including precision op amps, data converters, and power management ICs.
The LT1801 family was designed specifically for dual-channel, low-voltage, high-speed precision signal conditioning-targeting applications demanding rail-to-rail swing, low noise, and robust AC performance in space- and power-constrained systems.
FAQ
What is the maximum operating supply voltage for LT1801CS8#TRPBF?
The LT1801CS8#TRPBF has an absolute maximum total supply voltage of 12.6V across V+ and V– pins. It is fully specified and characterized for operation from 2.3V to 12.6V single supply or ±2.5V to ±5V split supplies. Exceeding 12.6V risks permanent damage per Absolute Maximum Ratings.
Does LT1801CS8#TRPBF support true rail-to-rail input and output operation?
Yes, the LT1801CS8#TRPBF supports true rail-to-rail input common-mode range (V– to V+) and rail-to-rail output swing (within 20mV of either rail under load). This is achieved via dual-input PNP/NPN stages and complementary emitter-follower output, enabling full dynamic range utilization in 3.3V and 5V systems.
What is the thermal resistance θJA of LT1801CS8#TRPBF in SO-8 package?
The LT1801CS8#TRPBF in SO-8 package has a junction-to-ambient thermal resistance (θJA) of 190°C/W under standard JEDEC test conditions (short traces). Connecting Pin 4 (V–) to a large PCB copper pour significantly reduces effective θJA, improving power handling and reliability in continuous 50mA-output applications.
Can LT1801CS8#TRPBF drive capacitive loads directly?
The LT1801CS8#TRPBF exhibits stability with moderate capacitive loads (≤100pF) in unity-gain configuration. For larger loads (e.g., >500pF cables or ADC input capacitance), a series output resistor (10–50Ω) is recommended to prevent peaking and overshoot, as confirmed by Figure G28/G29 in the datasheet.
What is the input bias current specification for LT1801CS8#TRPBF at room temperature?
The LT1801CS8#TRPBF has a maximum input bias current of 250nA at 25°C, measured with input common-mode voltage 0.2V above V– to 1.2V below V+. This low bias current enables accurate amplification of high-impedance sources such as piezoelectric sensors or photodiode transimpedance feedback networks.
LT1801CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 25V/µs
- Gain Bandwidth Product:
- 80 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 nA
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 1.6mA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1801CS8#TRPBF FAQ
1.How can I place an order for LT1801CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1801CS8#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 LT1801CS8#TRPBF reliable?
The price and inventory of LT1801CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1801CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1801CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1801CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1801CS8#TRPBF?
LT1801CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1801CS8#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 LT1801CS8#TRPBF?
For technical support, including LT1801CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1801CS8#TRPBF requirements.
6.How does Aetrix verify that LT1801CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1801CS8#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 LT1801CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1801CS8#TRPBF?
All LT1801CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1801CS8#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 LT1801CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1801CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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