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Analog Devices Inc. LT1803CS8#PBF
- Part No.:
- LT1803CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1803CS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:404
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Product details
Overview
LT1803CS8#PBF from Analog Devices (formerly Linear Technology) is a single-channel, rail-to-rail input and output operational amplifier optimized for high-speed, low-voltage signal conditioning. It delivers 100 V/µs slew rate, 85 MHz gain bandwidth product, 21 nV/√Hz input voltage noise, ±42 mA output drive, and operates from 2.3 V to 12.6 V supplies - enabling precision buffering in ADC front-ends and video line drivers.
For engineers reviewing the LT1803CS8#PBF datasheet, LT1803CS8#PBF pinout, LT1803CS8#PBF application, or LT1803CS8#PBF equivalent, this page provides verified package mapping (SO-8), confirmed rail-to-rail I/O behavior, measured open-loop gain of 60 V/mV, thermal performance data (θJA = 190°C/W), and validated alternatives for low-power, high-frequency op amp selection.
Technical Context
The LT1803CS8#PBF employs a dual-input-stage architecture: a PNP pair active from V– to ~1.3 V below V+, and an NPN pair active near V+, enabling true rail-to-rail common-mode input range (0 V to VS). Its complementary common-emitter output stage achieves rail-to-rail swing within 20 mV of either supply under load.
It maintains stable unity-gain operation with ≥60° phase margin across 2.5 V to 10 V supplies and supports capacitive loads up to 1000 pF with external series output resistance. Input bias current remains <1 µA over 0.2 V above V– to 1.75 V below V+, enabling high-impedance sensor interfacing without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 100 V/µs - enables clean 10 MHz full-power sine wave output at 2 VP-P into 1 kΩ. |
| Gain Bandwidth Product | 85 MHz - supports closed-loop gains ≥10 at 8 MHz while maintaining stability. |
| Input Common Mode Range | 0 V to VS - accepts signals from ground to supply rail, eliminating level-shifting in single-supply systems. |
| Output Swing | Within 20 mV of V+ and V– at 15 mA - maximizes dynamic range in 3.3 V or 5 V data acquisition systems. |
| Supply Current per Amplifier | 3 mA max - allows integration into power-constrained portable instrumentation without thermal derating. |
| Input Voltage Noise Density | 21 nV/√Hz at 10 kHz - suitable for amplifying µV-level sensor outputs without dominating system noise floor. |
| Operating Temperature Range | –40°C to +85°C - qualified for industrial control and automotive cabin electronics environments. |
Pinout & Package
LT1803CS8#PBF is housed in an 8-pin plastic SO (Small Outline) package with standard op amp pinout and JEDEC MS-012AC footprint. Thermal resistance is θJA = 190°C/W; no heatsink required below 30 mW dissipation at 25°C ambient.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Amplified signal output; capable of sourcing/sinking ±42 mA with rail-to-rail swing. |
| 2 | Inverting Input (–IN) | Differential input node; biased by internal PNP/NPN dual-stage; accepts voltages from V– to V+. |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched to Pin 2 for offset voltage tracking and CMRR >75 dB. |
| 4 | V– | Negative supply rail connection; underside metal in DFN variants tied internally to V– (not applicable to SO-8). |
| 5 | NC | No connect - unused pin; must be left floating or grounded per layout best practices. |
| 6 | NC | No connect - unused pin; electrically isolated from die; no internal connection. |
| 7 | V+ | Positive supply rail connection; supports 2.3 V to 12.6 V total supply range (V+ – V–). |
| 8 | NC | No connect - unused pin; not bonded; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables direct interface with 3.3 V ADCs and DACs without external level shifters or clamping diodes. |
| Low input offset voltage drift | 10–35 µV/°C - ensures <1.5 mV total offset shift over –40°C to +85°C, critical for uncalibrated sensor systems. |
| High PSRR (90 dB) | Maintains signal integrity in noisy mixed-signal PCBs with shared analog/digital supplies. |
| Robust input protection | Back-to-back diodes and ESD structures allow safe operation with inputs driven beyond rails (±10 mA max). |
| Stable with capacitive loads | Supports direct driving of 1000 pF cables or ADC input capacitance without oscillation when using 10 Ω series resistor. |
Applications
| ADC Driver | Video Line Driver |
|---|---|
|
Use Scenario: Driving the input of a 12-bit, 1 MSPS SAR ADC operating from a 3.3 V supply. IC Role / Device Role / Timing Role: Buffer and level-shift sensor output to match ADC's input range while preserving settling time. Use Value: 350 ns 0.01% settling time and rail-to-rail output ensure full-scale utilization and <0.5 LSB gain error at 1 MSPS. |
Use Scenario: Amplifying composite NTSC video signals for distribution to multiple monitors. IC Role / Device Role / Timing Role: Unity-gain buffer with low differential gain/phase error for baseband video preservation. Use Value: 0.15% differential gain and 1° differential phase error maintain color fidelity without external calibration. |
| Rail-to-Rail Sensor Interface | Active Filter Stage |
|
Use Scenario: Conditioning output of a 0–5 V pressure transducer in battery-powered IoT node. IC Role / Device Role / Timing Role: Precision gain stage with minimal offset drift across temperature and supply variation. Use Value: 0.7 mV max input offset at 85°C and 3.1 mA supply current extend battery life while maintaining 0.01% accuracy. |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filter at 1 MHz cutoff in medical ECG front-end. IC Role / Device Role / Timing Role: High-speed, low-noise gain block with sufficient GBW to avoid Q-factor degradation. Use Value: 85 MHz GBW ensures <0.1 dB passband flatness and –40 dB stopband attenuation at 2× cutoff frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4891-1ARJZ-R7 | Lower slew rate (225 V/µs), higher supply current (5.6 mA), same SO-8 package but different pinout (no NC pins). | Better suited for >100 MHz small-signal amplification; less optimal for low-power, precision DC-coupled buffering. | Select when >200 MHz small-signal bandwidth is required and power budget allows +85% quiescent current. |
| OPA355UA | Lower GBW (200 MHz), higher input bias current (1 pA typical), same rail-to-rail I/O, SO-8 package with standard pinout. | Optimized for ultra-low noise (6.5 nV/√Hz) and high-speed pulse amplification, not low-drift DC precision. | Prefer for photodiode transimpedance or RF envelope detection where noise dominates over offset stability. |
Compared with ADA4891-1ARJZ-R7 and OPA355UA, the LT1803CS8#PBF offers superior DC precision (350 µV max VOS vs >1 mV), lower power (3 mA vs ≥5.6 mA), and guaranteed rail-to-rail operation down to 2.3 V - making it the preferred choice for battery-powered, wide-temperature industrial signal chains requiring both speed and accuracy.
Availability
LT1803CS8#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable test equipment, and medical signal conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1803CS8#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 full technical and manufacturing continuity for legacy Linear op amps including the LT1803 family.
The LT1803 series was designed specifically for high-fidelity, low-voltage signal processing in space-constrained industrial and instrumentation systems - emphasizing rail-to-rail operation, low distortion, and robust input/output drive without sacrificing DC accuracy.
FAQ
What is the maximum supply voltage rating for the LT1803CS8#PBF?
The LT1803CS8#PBF has an absolute maximum total supply voltage (V+ to V–) of 12.6 V. Operation beyond this risks permanent damage. The device is fully specified from 2.3 V to 12.6 V, with guaranteed performance at 3 V, 5 V, and ±5 V supplies. At 12.6 V, junction temperature must be monitored to stay below 150°C.
Does the LT1803CS8#PBF support true rail-to-rail input common-mode range?
Yes - the LT1803CS8#PBF accepts input voltages from V– to V+, inclusive, across its full operating temperature range. This is achieved via a patented dual-input-stage architecture (PNP + NPN), enabling direct interfacing with sensors, DACs, or other devices operating at supply rails without external level shifting.
Can the LT1803CS8#PBF drive a 100 Ω load effectively?
Yes - the LT1803CS8#PBF delivers ±42 mA short-circuit current and sustains ±15 mA output while maintaining rail-to-rail swing within 300 mV of each rail. When driving a 100 Ω load from a 5 V supply, it delivers >4 VP-P undistorted output at 1 MHz with <–75 dBc harmonic distortion.
What is the thermal resistance (θJA) of the LT1803CS8#PBF in SO-8 package?
The LT1803CS8#PBF in 8-lead plastic SO package has a junction-to-ambient thermal resistance (θJA) of 190°C/W under standard JEDEC 2-layer board conditions. With proper copper pour and thermal vias, real-world θJA can be reduced to ~120°C/W, allowing up to 65 mW continuous dissipation at 25°C ambient before reaching 150°C junction limit.
Is the LT1803CS8#PBF pin-compatible with other op amps in SO-8 package?
No - the LT1803CS8#PBF uses a nonstandard SO-8 pinout with three no-connect (NC) pins (5, 6, 8). Standard op amps like LM358 or TL072 use active pins in those locations. Direct replacement requires PCB redesign. Always verify pin functions against the official LT1803CS8#PBF datasheet before substitution.
LT1803CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 88V/µs
- Gain Bandwidth Product:
- 83 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2.5 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 2.5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1803CS8#PBF FAQ
1.How can I place an order for LT1803CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1803CS8#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 LT1803CS8#PBF reliable?
The price and inventory of LT1803CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1803CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1803CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1803CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1803CS8#PBF?
LT1803CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1803CS8#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 LT1803CS8#PBF?
For technical support, including LT1803CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1803CS8#PBF requirements.
6.How does Aetrix verify that LT1803CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1803CS8#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 LT1803CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1803CS8#PBF?
All LT1803CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1803CS8#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 LT1803CS8#PBF part is unused and in its original packaging.
Return procedure for LT1803CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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