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Analog Devices Inc. LT1784CS5#TRMPBF
- Part No.:
- LT1784CS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1784CS5#TRMPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,142
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Product details
Overview
LT1784CS5#TRMPBF from Analog Devices (formerly Linear Technology) is a 2.5MHz rail-to-rail input/output operational amplifier in a 5-lead TSOT-23 package, operating from 2.5V to 18V total supply. It features Over-The-Top® operation-accepting inputs up to 18V above V– and ≥1V above V+-with ≤3.5mV max input offset voltage, 750μA max quiescent current, and ±15mA output drive capability. It is used in battery-powered sensor signal conditioning where input overvoltage tolerance and single-supply rail-to-rail swing are critical.
For engineers reviewing the LT1784CS5#TRMPBF datasheet, LT1784CS5#TRMPBF pinout, LT1784CS5#TRMPBF application, or LT1784CS5#TRMPBF equivalent, key selection criteria include verified Over-The-Top® input range (VIN ≥ V+), guaranteed rail-to-rail I/O performance at 3V/5V supplies, thermal stability across –40°C to 85°C, and absence of shutdown functionality in the 5-lead variant.
Technical Context
The LT1784CS5#TRMPBF employs dual-input-stage architecture (NPN + PNP) enabling Over-The-Top® operation: inputs remain functional even when ≥1V above V+, with phase reversal protection for inputs down to 9V below V–. Its internal compensation supports stable operation driving ≥400pF capacitive loads without external compensation.
Unlike the 6-lead LT1784CS6 variant, the LT1784CS5#TRMPBF lacks a SHDN pin and therefore provides no shutdown mode-quiescent current remains fixed at ≤750μA across temperature and supply. Input bias current varies with common-mode voltage (–250nA typical in PNP region, +500nA near V+), directly impacting precision in high-impedance source applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 2.5MHz typical - enables stable unity-gain operation up to ~2.5MHz; sufficient for 100kHz sensor amplification with margin. |
| Slew Rate | 2.1V/μs typical - supports full-scale 2V output steps in <1μs; adequate for fast-settling supply monitoring. |
| Input Offset Voltage | ≤3.5mV (–40°C to 85°C) - ensures ≤0.07% error in 5V full-scale current-sense applications. |
| Supply Current | ≤750μA max - enables multi-year battery life in 10μA-average IoT sensor nodes with duty-cycled operation. |
| Input Voltage Range | 0V to 18V on single supply - accepts inputs beyond V+, e.g., 12V automotive signals into 5V-system op amp without level shifters. |
| Output Drive | ±15mA min - drives 330Ω loads to rail while maintaining linearity; suitable for 4–20mA transmitter output stages. |
| Operating Temperature | –40°C to 85°C - qualified for industrial ambient environments without derating. |
Pinout & Package
LT1784CS5#TRMPBF uses the 5-lead TSOT-23 (S5) package: 1.75mm × 2.90mm × 1.00mm profile, JEDEC MO-193 compliant, with exposed pad not electrically connected. Pin 1 is marked by a dot; device orientation follows standard TSOT-23 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Push-pull rail-to-rail stage capable of sourcing/sinking ≥15mA; output impedance <1Ω at DC; requires local 0.1μF bypass. |
| 2 (V–) | Negative supply / ground reference | Return path for all internal current sources; reverse-battery protected to –18V; must be decoupled within 1 inch. |
| 3 (+IN) | Non-inverting input | Dual-stage input (NPN/PNP); accepts voltages from V– to ≥V+ +1V; 5pF input capacitance limits high-Z AC coupling bandwidth. |
| 4 (V+) | Positive supply | Accepts 2.5V–18V total supply; reverse-battery protected; requires 0.1μF ceramic bypass close to pin. |
| 5 (–IN) | Inverting input | Matches +IN in voltage range and protection; differential input rating of 18V; no internal clamping diodes to rails. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® input operation | Enables direct interface to unregulated or overvoltage sources (e.g., 12V battery sensing in 5V systems) without external attenuation or protection circuitry. |
| Rail-to-rail input and output | Supports full dynamic range utilization on 3V and 5V supplies-output swings within 80mV of V+ and 4mV of V– at no load-maximizing ADC resolution. |
| Reverse battery protection | Draws <1nA at –18V supply-eliminates need for series diode in portable equipment, preserving voltage headroom and efficiency. |
| Phase reversal protection | Prevents false output inversion when inputs dip to –9V relative to V–, critical for fault-tolerant supply monitoring and clamp circuits. |
| Low 1/f noise | 1.5μVP-P (0.1Hz–10Hz) - enables stable DC-coupled amplification of low-frequency sensor outputs (e.g., thermopiles, strain gauges). |
Applications
| Battery Voltage Monitoring | Current-Sense Amplifier |
|---|---|
|
Use Scenario: Monitoring 9–16V automotive battery voltage with a 3.3V microcontroller ADC. IC Role / Device Role / Timing Role: Precision buffer and level translator; accepts input >V+ and delivers rail-to-rail output scaled to MCU input range. Use Value: Eliminates external resistive divider and protection Zener, reducing BOM count and improving accuracy over temperature. |
Use Scenario: High-side current sensing in a 5V motor driver with shunt placed between load and V+. IC Role / Device Role / Timing Role: Difference amplifier with common-mode rejection; measures mV-level shunt voltage referenced to V+. Use Value: Over-The-Top® input allows direct connection to shunt top node at 5V, avoiding level-shifting errors and gain drift. |
| 4–20mA Transmitter Output Stage | Overvoltage-Tolerant Sensor Interface |
|
Use Scenario: Driving 4–20mA loop from a 5V DAC output in industrial process control. IC Role / Device Role / Timing Role: Current-output transimpedance amplifier with rail-to-rail swing and robust short-circuit tolerance. Use Value: ±15mA drive capability and 2.1V/μs slew rate ensure fast loop response (<5μs settling) and compliance with HART modulation timing. |
Use Scenario: Conditioning output of a 0–10V industrial sensor exposed to transient overvoltages up to ±18V. IC Role / Device Role / Timing Role: Protected front-end amplifier; handles 18V differential/common-mode surges without latch-up or damage. Use Value: Integrated 1kΩ series input resistors and diode clamps to V– enable direct connection-no external TVS or series R required. |
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#TRMPBF | Lower power (55μA vs 750μA), lower GBW (1.2MHz), higher offset (800μV max) | Better for ultra-low-power always-on sensors; insufficient for >100kHz signal paths or high-drive loads | Select when supply current <100μA is mandatory and bandwidth ≤100kHz suffices. |
| LT1797CS5#TRMPBF | Higher bandwidth (10MHz), higher slew rate (2.25V/μs), no Over-The-Top® capability, VCM limited to V+ – 1.2V | Superior for high-frequency active filters or ADC drivers; cannot accept inputs above V+ | Select when speed is critical and input signals stay within standard rail-referenced range. |
Compared with LT1782CS5#TRMPBF and LT1797CS5#TRMPBF, the LT1784CS5#TRMPBF uniquely balances moderate speed (2.5MHz), robust Over-The-Top® input tolerance, and low quiescent current-making it optimal for industrial sensor interfaces requiring both overvoltage resilience and sub-1mA power budget.
Availability
LT1784CS5#TRMPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive body electronics, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for LT1784CS5#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 full product support, qualification, and manufacturing continuity for legacy Linear op amps including the LT1784 family.
The LT1784 series was designed specifically for ruggedized signal conditioning in harsh environments-emphasizing Over-The-Top® input tolerance, reverse-supply survival, and rail-to-rail operation on low-voltage single supplies.
FAQ
Does LT1784CS5#TRMPBF support shutdown mode?
No. The LT1784CS5#TRMPBF is the 5-lead SOT-23 variant and does not include a SHDN pin. Shutdown functionality is exclusive to the 6-lead LT1784CS6#TRMPBF. The LT1784CS5#TRMPBF draws ≤750μA continuously across its full operating temperature range and cannot be disabled.
What is the maximum input voltage the LT1784CS5#TRMPBF can tolerate relative to V+?
The LT1784CS5#TRMPBF supports Over-The-Top® operation: either or both inputs may exceed V+ by ≥1V, with full functionality up to 18V above V– regardless of V+. This is confirmed in the Absolute Maximum Ratings (input pin voltage to V– = +24V) and Applications Information section of the LT1784 datasheet.
Can LT1784CS5#TRMPBF drive a 1000pF capacitive load stably?
Yes. The LT1784CS5#TRMPBF is internally compensated to drive ≥400pF capacitively without oscillation. For 1000pF loads, stability is maintained under all output current conditions per the "Capacitive Load Handling" typical performance curve (G30). No external compensation is required for this load.
Is LT1784CS5#TRMPBF specified for operation at 3V single supply?
Yes. The LT1784CS5#TRMPBF is explicitly characterized and guaranteed at 3V single supply (V+ = 3V, V– = 0V) across all key parameters-including input offset voltage (≤3.5mV), output swing (≥2.6V high, ≤400mV low at 3mA), and gain bandwidth (≥1.2MHz)-as documented in the Electrical Characteristics tables.
How does input bias current vary with common-mode voltage in LT1784CS5#TRMPBF?
The LT1784CS5#TRMPBF uses dual-input-stage architecture: input bias current is ≈–250nA when VCM is >1V below V+, shifts to ≈+500nA near V+, and jumps to ≈+200μA when VCM exceeds V+ by >0.3V. This behavior is detailed in the "Input Bias Current vs Common Mode Voltage" plot (G04) and Applications Information section.
LT1784CS5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- 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:
- 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-23-5
LT1784CS5#TRMPBF FAQ
1.How can I place an order for LT1784CS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1784CS5#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 LT1784CS5#TRMPBF reliable?
The price and inventory of LT1784CS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1784CS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1784CS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1784CS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1784CS5#TRMPBF?
LT1784CS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1784CS5#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 LT1784CS5#TRMPBF?
For technical support, including LT1784CS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1784CS5#TRMPBF requirements.
6.How does Aetrix verify that LT1784CS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1784CS5#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 LT1784CS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1784CS5#TRMPBF?
All LT1784CS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1784CS5#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 LT1784CS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1784CS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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