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Analog Devices Inc. LT1803IS5#TRMPBF
- Part No.:
- LT1803IS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1803IS5#TRMPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:383
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Product details
Overview
LT1803IS5#TRMPBF from Analog Devices (formerly Linear Technology) is a single, 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 current, and operates from 2.3 V to 12.6 V supply rails - enabling precision buffering in portable instrumentation and ADC driver stages.
For engineers reviewing the LT1803IS5#TRMPBF datasheet, LT1803IS5#TRMPBF pinout, LT1803IS5#TRMPBF application, or LT1803IS5#TRMPBF equivalent, key selection criteria include rail-to-rail I/O swing within 20 mV of rails, 3.1 mA max quiescent current per amplifier at –40°C to +85°C, and verified performance on 3 V, 5 V, and ±5 V supplies with no phase reversal when inputs exceed rails.
Technical Context
The LT1803IS5#TRMPBF 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 or VS– to VS+). This design ensures consistent offset voltage behavior across the full input range without phase reversal.
Its complementary common-emitter output stage supports rail-to-rail output swing (within 20 mV of either rail at 15 mA load), while internal compensation maintains stability with capacitive loads up to 1000 pF when used with series output resistors - critical for driving long traces or ADC input capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 100 V/µs - enables clean 10 MHz small-signal amplification and fast settling for 12-bit+ ADC sampling. |
| Gain Bandwidth Product | 85 MHz - supports closed-loop gains ≥10 at >8 MHz, suitable for video line drivers and active filters. |
| Input Common-Mode Range | 0 V to VS (single supply) or VS– to VS+ (dual supply) - eliminates level-shifting needs in sensor front-ends. |
| Output Swing | Within 20 mV of VS– and VS+ at 15 mA - maximizes dynamic range in 3 V systems with 12-bit ADCs requiring >3 VPP full-scale. |
| Supply Current | 3.1 mA max per amplifier at –40°C to +85°C - allows battery-powered designs with multi-channel analog signal chains. |
| Input Voltage Noise | 21 nV/√Hz at 10 kHz - preserves SNR in low-level transducer amplification (e.g., strain gauges, thermopiles). |
| Open-Loop Gain | 48 V/mV min at –40°C to +85°C - ensures <0.01% gain error in unity-gain buffer configurations with 1 kΩ load. |
Pinout & Package
LT1803IS5#TRMPBF is housed in a 5-pin TSOT-23 (ThinSOT™) package, 1.0 mm profile, with exposed pad thermally connected to V–. Pin 1 = V+, Pin 2 = V–, Pin 3 = +IN, Pin 4 = –IN, Pin 5 = VOUT. No NC pins. Standard op-amp pinout aligns with industry layout conventions for drop-in replacement in space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply Rail | Accepts 2.3 V to 12.6 V (single) or ±2.5 V to ±6.3 V (dual); decoupling capacitor required within 1 cm. |
| 2 (V–) | Negative Supply Rail / Ground | Internally connects to exposed thermal pad; PCB copper pour recommended for thermal management. |
| 3 (+IN) | Non-Inverting Input | High-impedance node (2 pF CIN) with bias current ≤200 nA at –40°C to +85°C; compatible with high-Z sensors. |
| 4 (–IN) | Inverting Input | Matches +IN in offset voltage (≤6.5 mV channel-to-channel) and CMRR (≥69 dB) for precision differential gain stages. |
| 5 (VOUT) | Amplifier Output | Capable of sourcing/sinking ±34 mA at 3 V supply; requires series resistor (≥10 Ω) when driving >100 pF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables direct interfacing with 3 V logic and 12-bit SAR ADCs without external level shifters or clamping diodes. |
| Low 21 nV/√Hz input voltage noise | Maintains >70 dB SNR in 100 kHz bandwidth applications such as medical ECG front-ends and audio preamps. |
| Input stage auto-switching (PNP/NPN) | Eliminates crossover distortion and ensures monotonic input offset vs. common-mode voltage across full rail range. |
| Stable with >1000 pF capacitive load | Permits direct connection to ADC input capacitors (e.g., AD7980, 23 pF) and long PCB traces without external isolation resistors. |
| No phase reversal on overdrive | Allows safe operation in comparator-like circuits or transient overload conditions without latch-up or signal corruption. |
Applications
| Portable Instrumentation | ADC Driver |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring µA-level leakage currents with 16-bit resolution. IC Role / Device Role / Timing Role: Precision transimpedance amplifier converting photodiode or DUT current into buffered voltage for sigma-delta ADC. Use Value: 200 nA max input bias current at 25°C and rail-to-rail output swing preserve accuracy across 0–3 V ADC input range without gain compression. | Use Scenario: Driving the switched-capacitor input of a 1 MSPS, 12-bit SAR ADC in a motor control feedback loop. IC Role / Device Role / Timing Role: Low-distortion, fast-settling buffer isolating multiplexer output from ADC sampling transient. Use Value: 350 ns 0.01% settling time and –75 dBc harmonic distortion at 1 MHz ensure <0.5 LSB error in full-scale step response. |
| Rail-to-Rail Sensor Interface | Video Line Driver |
Use Scenario: Amplifying output of a 0–5 V pressure transducer in an industrial IoT node powered by 3.3 V LDO. IC Role / Device Role / Timing Role: Unity-gain buffer compensating for cable capacitance and maintaining signal integrity over 1 m PCB trace. Use Value: 85 MHz GBW and 100 V/µs slew rate prevent bandwidth limiting and slew-induced distortion in 0–100 kHz sensor bandwidth. | Use Scenario: Driving 75 Ω coaxial video lines in embedded vision systems using NTSC composite signals. IC Role / Device Role / Timing Role: High-current line driver delivering 2 VP-P into 75 Ω with minimal differential gain/phase error. Use Value: 0.15% differential gain and 1° differential phase error at NTSC frequencies ensure broadcast-grade color fidelity. |
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 80 MHz GBW, 175 V/µs slew rate, 1.2 mA supply current, same SOT-23-5 package. | Better power efficiency but reduced bandwidth limits use in >5 MHz active filters or video paths. | Select when optimizing for <1.5 mA supply current in portable devices and bandwidth ≤5 MHz suffices. |
| OPA356AIDBVR | Higher 200 MHz GBW, 360 V/µs slew rate, 7.5 mA supply current, SOT-23-5 package, no guaranteed rail-to-rail input. | Superior speed for >10 MHz applications but input common-mode range excludes V–, requiring level-shifting for ground-referenced sensors. | Select when maximum bandwidth and slew rate are critical and input can be biased above V– by ≥0.5 V. |
Compared with ADA4891-1ARJZ-R7 and OPA356AIDBVR, the LT1803IS5#TRMPBF uniquely balances 85 MHz bandwidth, true rail-to-rail input/output, and 3.1 mA supply current - making it optimal for 3 V portable instrumentation where both precision and speed constrain the design.
Availability
LT1803IS5#TRMPBF is available at Aetrix Electronics and suitable for portable instrumentation, ADC driver stages, rail-to-rail sensor interfaces, and video line driver applications requiring stable component supply across extended temperature ranges.
Supply support for LT1803IS5#TRMPBF 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, including precision op amps, data converters, and power management ICs.
The LT1803IS5#TRMPBF belongs to Linear's high-speed rail-to-rail op amp family, designed specifically for low-voltage, high-fidelity signal conditioning in portable test equipment, medical devices, and industrial sensing systems.
FAQ
What is the operating temperature range for the LT1803IS5#TRMPBF?
The LT1803IS5#TRMPBF is specified for operation from –40°C to +85°C. This industrial temperature grade is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics sections covering the "G" (–40°C to +85°C) condition column. The "I" suffix in the part number explicitly denotes this extended temperature range.
Does the LT1803IS5#TRMPBF support true rail-to-rail input common-mode range?
Yes, the LT1803IS5#TRMPBF supports true rail-to-rail input common-mode range: 0 V to VS on single supply, or VS– to VS+ on dual supply. This is verified in the Electrical Characteristics tables under "Input Common Mode Range" and confirmed in the Circuit Description section, which details the auto-switching PNP/NPN input stage that covers the full rail span without phase reversal.
What is the typical supply current for the LT1803IS5#TRMPBF at 3 V operation?
The typical supply current for the LT1803IS5#TRMPBF at 3 V operation is 2.7 mA per amplifier, with a maximum of 3.1 mA over the full –40°C to +85°C temperature range. This value is specified in the Electrical Characteristics table under "IS Supply Current per Amplifier" for the G (–40°C to +85°C) condition with VS = 3 V, 0 V.
Can the LT1803IS5#TRMPBF drive a 1000 pF capacitive load stably?
Yes, the LT1803IS5#TRMPBF can drive a 1000 pF capacitive load stably when used with a series output resistor (≥10 Ω), as shown in Figure G30 and G31 of the datasheet. Without the resistor, instability (overshoot >45%) occurs above ~100 pF. The internal compensation is optimized for 1 kΩ || 100 pF loads, so external isolation is required for larger capacitances.
What is the output voltage swing capability of the LT1803IS5#TRMPBF at 15 mA load current?
At 15 mA load current, the LT1803IS5#TRMPBF delivers an output voltage swing of 200–350 mV above V– and 300–600 mV below V+, depending on temperature and supply voltage. For example, at VS = 5 V, 0 V and TA = 25°C, VOL = 180–300 mV and VOH = 350–600 mV - ensuring >4.4 VPP usable swing into moderate loads.
LT1803IS5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- 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:
- 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:
- TSOT-23-5
LT1803IS5#TRMPBF FAQ
1.How can I place an order for LT1803IS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1803IS5#TRMPBF 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 LT1803IS5#TRMPBF reliable?
The price and inventory of LT1803IS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1803IS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1803IS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1803IS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1803IS5#TRMPBF?
LT1803IS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1803IS5#TRMPBF 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 LT1803IS5#TRMPBF?
For technical support, including LT1803IS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1803IS5#TRMPBF requirements.
6.How does Aetrix verify that LT1803IS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1803IS5#TRMPBF 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 LT1803IS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1803IS5#TRMPBF?
All LT1803IS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1803IS5#TRMPBF, 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 LT1803IS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1803IS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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