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Analog Devices Inc. LT1784CS6#TRPBF
- Part No.:
- LT1784CS6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LT1784CS6#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,790
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Product details
Overview
LT1784CS6#TRPBF from Analog Devices (formerly Linear Technology) is a 2.5MHz, rail-to-rail input/output operational amplifier in a 6-lead TSOT-23 package, featuring Over-The-Top® operation with inputs up to 18V above V– or above V+, reverse battery protection to 18V, and shutdown capability. It operates from 2.5V to 18V total supply, draws ≤750μA quiescent current, and drives ±15mA loads - ideal for precision sensor conditioning in battery-powered industrial monitoring systems.
For engineers reviewing the LT1784CS6#TRPBF datasheet, LT1784CS6#TRPBF pinout, LT1784CS6#TRPBF application, or LT1784CS6#TRPBF equivalent, key selection criteria include its unique over-the-rail input capability, shutdown-induced 5μA quiescent current, rail-to-rail swing at low supply voltages, and guaranteed –40°C to 85°C performance for embedded analog front-ends.
Technical Context
The LT1784CS6#TRPBF integrates dual-input-stage architecture (NPN and PNP) enabling seamless Over-The-Top® operation: inputs function correctly when ≥18V above V– or >V+, with phase reversal protection active for inputs down to 9V below V–. Its internal compensation supports ≥400pF capacitive loads without oscillation.
Shutdown control is implemented via a dedicated SHDN pin (Pin 5), requiring ≥2V above V– to disable the amplifier - reducing supply current to ≤18μA and placing the output in high-impedance state. Input common-mode range spans –5V to +13V on split supplies and 0V to 18V on single supplies, with CMRR ≥60dB across full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 2.5MHz typical - enables stable unity-gain operation up to ~2.5MHz or closed-loop gain of 10 at ~250kHz. |
| Slew Rate | 2.1V/μs typical - supports clean 10VP-P output at ≥100kHz without slew-induced distortion. |
| Input Offset Voltage | 3.5mV max (–40°C to 85°C) - ensures ≤35mV error in 10× gain signal chains without trimming. |
| Supply Current | 750μA max - allows continuous operation for >1 year on a 200mAh coin cell in always-on sensor nodes. |
| Output Drive | ±15mA min - directly interfaces with 66Ω loads (e.g., 50Ω + 16Ω) or drives ADC reference buffers without external gain stages. |
| Shutdown Current | ≤18μA (–40°C to 85°C) - reduces system standby power by >97% versus active mode. |
| Operating Temperature | –40°C to 85°C - qualified for industrial automation, automotive body electronics, and outdoor instrumentation. |
Pinout & Package
LT1784CS6#TRPBF uses a 6-lead ThinSOT™ (TSOT-23) package, 1.00mm max height, JEDEC MO-193 compliant, with 0.95mm pitch and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Rail-to-rail swing: within 80mV of V+ and 4mV of V– at no load; maintains linearity driving 10kΩ loads. |
| 2 (V–) | Negative supply rail | Reference for all internal biasing; accepts –18V reverse voltage with <1nA leakage. |
| 3 (+IN) | Non-inverting input | Over-The-Top® capable: functions with voltage up to 18V above V– or >V+; protected by series 1kΩ resistor and clamp diode. |
| 4 (V+) | Positive supply rail | Accepts 2.5V–18V total supply; requires local 0.1μF bypass capacitor within 25mm of pin. |
| 5 (SHDN) | Shutdown control input | Active-high: ≥2V above V– disables amplifier; ≤0.3V above V– enables operation; draws ≤8μA in shutdown. |
| 6 (–IN) | Inverting input | Matches +IN in Over-The-Top® range and phase reversal protection; differential input voltage rated to ±18V. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® input operation | Enables direct sensing of signals referenced to V+ or floating >18V above ground - eliminates level-shifting circuitry in high-side current monitors. |
| Rail-to-rail input and output | Supports full dynamic range utilization on 3V single supply: input accepts 0–3V, output delivers 10mV–2.99V with <1% gain error. |
| Reverse battery protection | Draws <1nA at –18V supply - prevents damage and battery drain in automotive or portable equipment with accidental polarity reversal. |
| Shutdown mode | Reduces supply current to ≤18μA and isolates output (high-Z) - enables power-gating in multi-channel data acquisition systems. |
| Phase reversal protection | Guarantees correct output polarity even when inputs are driven 9V below V– - critical for fault-tolerant industrial I/O modules. |
Applications
| High-Side Current Sensing | Battery Voltage Monitoring |
|---|---|
Use Scenario: Measuring motor phase current in 24V industrial drives using a 10mΩ shunt placed between MOSFET source and ground. IC Role / Device Role / Timing Role: Amplifier configured as non-inverting difference amplifier with Over-The-Top® inputs referenced to 24V rail. Use Value: Eliminates need for isolated amplifiers or level shifters; achieves ±0.5% measurement accuracy across –40°C to 85°C. |
Use Scenario: Monitoring Li-ion pack voltage (2.5–4.2V/cell) in handheld medical devices with 3.3V MCU supply. IC Role / Device Role / Timing Role: Unity-gain buffer with rail-to-rail input accepting 0–16.8V, scaled via resistive divider into 3.3V ADC range. Use Value: Maintains 12-bit linearity across full temperature range; shutdown mode extends battery life during sleep cycles. |
| 4–20mA Transmitter Output Stage | Programmable Gain Sensor Interface |
Use Scenario: Driving 4–20mA loop in process control transmitters powered from 12–36V loop supply. IC Role / Device Role / Timing Role: Output stage amplifier with V+ tied to loop voltage, V– grounded, sourcing up to 25mA into 600Ω load. Use Value: Delivers full 20mA compliance at 36V supply with <100mV headroom; reverse protection prevents field-wiring faults from damaging PCB. |
Use Scenario: Conditioning thermocouple output (±10mV) in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision op-amp with external gain-setting resistors (AV = 2 or 20) and shutdown controlled by FPGA GPIO. Use Value: Enables software-selectable gain without rework; 3.5mV offset ensures <0.1°C error in Type-K measurements after calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1782CS5#TRPBF | Lower power (55μA vs 750μA), lower GBW (1.2MHz), no shutdown pin, 5-lead SOT-23. | Lacks Over-The-Top® input range beyond V+; limited to 0–5V single-supply apps with ultra-low power budgets. | Select when battery life >10 years required and input signals stay within supply rails. |
| LT1797CS6#TRPBF | Higher speed (10MHz GBW, 2.25V/μs SR), no Over-The-Top®, same 6-lead TSOT-23 package. | Cannot accept inputs above V+; optimized for unity-gain stable high-frequency signal paths (e.g., active filters). | Select for bandwidth-critical applications where input voltage stays within rails and shutdown is not needed. |
Compared with LT1782CS5#TRPBF and LT1797CS6#TRPBF, the LT1784CS6#TRPBF uniquely combines Over-The-Top® input operation, shutdown control, and industrial temperature rating - making it the only choice for high-side sensing and reverse-protected analog front-ends in harsh environments.
Availability
LT1784CS6#TRPBF is available at Aetrix Electronics and suitable for high-reliability industrial instrumentation, battery-powered medical sensors, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1784CS6#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 and maintains full product support, manufacturing, and qualification for legacy Linear parts including the LT1784 family.
The LT1784 series was designed specifically for precision analog signal conditioning in space-constrained, low-power, and fault-tolerant applications - emphasizing Over-The-Top® operation, rail-to-rail swing, and robust protection features.
FAQ
What is the maximum input voltage range supported by the LT1784CS6#TRPBF?
The LT1784CS6#TRPBF supports an input common-mode voltage range of –5V to +13V on split supplies and 0V to 18V on single supplies. Critically, its Over-The-Top® architecture allows either or both inputs to operate up to 18V above V–, independent of V+, and up to 18V differential - verified per Absolute Maximum Ratings and Typical Performance curves G03/G04.
Does the LT1784CS6#TRPBF require external compensation for capacitive loads?
No - the LT1784CS6#TRPBF is internally compensated to drive ≥400pF capacitively without instability. For loads >400pF (e.g., 10,000pF cables), Analog Devices recommends adding a 0.22μF capacitor in series with a 150Ω resistor from output to ground, as documented in Applications Information section on Capacitive Load Handling.
How does the shutdown feature affect output impedance and leakage in the LT1784CS6#TRPBF?
In shutdown mode (SHDN ≥2V above V–), the LT1784CS6#TRPBF output enters high-impedance state with leakage ≤1μA (–40°C to 85°C). This is confirmed in Electrical Characteristics tables under "Output Leakage Current, Shutdown" and validated in Typical Performance curve G28 showing supply current collapse to <20μA at SHDN = 2V.
Can the LT1784CS6#TRPBF be used with a 3V single supply while maintaining rail-to-rail output swing?
Yes - the LT1784CS6#TRPBF delivers rail-to-rail output swing on 3V supply: VOH ≥2.600V at ISOURCE = 3mA and VOL ≤400mV at ISINK = 5mA (per Electrical Characteristics table, VS = 3V condition). This enables full 0–3V dynamic range utilization in low-voltage microcontroller interfaces.
What protection features does the LT1784CS6#TRPBF include against input faults?
The LT1784CS6#TRPBF integrates three key protections: (1) phase reversal protection preventing false outputs when inputs drop ≤9V below V–; (2) reverse battery protection limiting current to <1nA at –18V supply; and (3) internal 1kΩ series resistors plus clamp diodes on both inputs, enabling survival at –10V below V– (per Absolute Maximum Ratings and Applications Information).
LT1784CS6#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.2V/µs
- Gain Bandwidth Product:
- 2.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 250 nA
- Voltage - Input Offset:
- 1.6 mV
- Current - Supply:
- 750µA
- Current - Output / Channel:
- 27 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 18 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LT1784CS6#TRPBF FAQ
1.How can I place an order for LT1784CS6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1784CS6#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 LT1784CS6#TRPBF reliable?
The price and inventory of LT1784CS6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1784CS6#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1784CS6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1784CS6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1784CS6#TRPBF?
LT1784CS6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1784CS6#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 LT1784CS6#TRPBF?
For technical support, including LT1784CS6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1784CS6#TRPBF requirements.
6.How does Aetrix verify that LT1784CS6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1784CS6#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 LT1784CS6#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1784CS6#TRPBF?
All LT1784CS6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1784CS6#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 LT1784CS6#TRPBF part is unused and in its original packaging.
Return procedure for LT1784CS6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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