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Analog Devices Inc. LT1784IS5#TRMPBF
- Part No.:
- LT1784IS5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1784IS5#TRMPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,067
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Product details
Overview
LT1784IS5#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 ≤750μA quiescent current, ±15mA output drive, and reverse battery protection to 18V. It is used in precision sensor conditioning and supply current sensing where input voltage exceeds the positive rail.
For engineers reviewing the LT1784IS5#TRMPBF datasheet, LT1784IS5#TRMPBF pinout, LT1784IS5#TRMPBF application, or LT1784IS5#TRMPBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, input common-mode range extending 18V beyond V–, rail-to-rail swing with <4mV low-side and <80mV high-side saturation, and absence of shutdown functionality (5-lead variant).
Technical Context
The LT1784IS5#TRMPBF employs dual-input-stage architecture (NPN and PNP) enabling Over-The-Top® operation: inputs remain functional even when >1V above V+, with automatic stage switching and built-in phase reversal protection for inputs down to 9V below V–. Its input stage tolerates 18V differential and common-mode voltage independent of supply.
This op amp is internally compensated for stable operation with ≥400pF capacitive loads and delivers 2.1V/μs slew rate with 2.5MHz gain-bandwidth product at 25°C. It maintains rail-to-rail output swing while sourcing/sinking ≥15mA, with output leakage <1μA and input offset voltage ≤4.5mV over –40°C to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 2.5MHz typical - enables stable unity-gain operation up to ~2.5MHz; supports bandwidth-critical signal conditioning. |
| Slew Rate | 2.1V/μs typical - ensures fast settling for step inputs up to ~2V amplitude without distortion. |
| Input Offset Voltage | ≤4.5mV max (–40°C to 85°C) - supports accurate DC-coupled amplification in precision sensor interfaces. |
| Supply Current | ≤750μA max - enables multi-year battery life in portable instrumentation and low-power monitoring systems. |
| Input Common-Mode Range | 0V to 18V on single supply (or –5V to +13V on split supply) - allows direct sensing of voltages exceeding V+ in supply monitoring. |
| Output Drive Capability | ≥15mA min sink/source - drives 10kΩ loads to rail with <0.1% linearity error and supports 4–20mA transmitter output stages. |
| Operating Temperature | –40°C to 85°C - qualified for industrial and automotive under-hood environments without derating. |
Pinout & Package
LT1784IS5#TRMPBF is housed in a 5-lead ThinSOT™ (TSOT-23) package (JEDEC MO-193), 1.00mm max height, 2.80mm × 1.90mm footprint. Pin 1 marked by beveled corner; no thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Capable of rail-to-rail swing (within 4mV of V–, 80mV of V+) and ≥15mA drive; high-impedance when unused. |
| 2 (V–) | Negative supply rail | Reference for all internal circuitry; accepts –10V to +24V relative to V– per absolute max rating; reverse-battery protected. |
| 3 (+IN) | Non-inverting input | Over-The-Top® capable: operates with voltage ≥1V above V+ or ≤9V below V–; includes phase reversal protection. |
| 4 (V+) | Positive supply rail | Accepts 2.5V to 18V total supply; bypassing with 0.1μF capacitor within 25mm is mandatory for stability. |
| 5 (–IN) | Inverting input | Matches +IN performance: same Over-The-Top® range, 18V differential tolerance, and ESD-protected input structure. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Operation | Enables direct measurement of signals exceeding V+, e.g., battery voltage monitoring in 12V systems using 5V-supplied circuitry. |
| Rail-to-Rail Input and Output | Maximizes dynamic range across full supply: usable input from V– to V+, output swing to within 4mV of rails. |
| Reverse Battery Protection | Draws <1nA at –18V supply - eliminates need for external series diode in automotive or portable power inputs. |
| Low Input Offset Drift | 5–15μV/°C - maintains accuracy over temperature in uncalibrated industrial sensor front-ends. |
| High CMRR at Full Rail | ≥60dB at VCM = 0V to 18V - preserves signal integrity when amplifying small differential signals in noisy supply environments. |
Applications
| Battery Voltage Monitoring | Current-Sense Amplifier |
|---|---|
|
Use Scenario: Monitoring 12V lead-acid battery voltage in a microcontroller-based power management system powered from regulated 3.3V. IC Role / Device Role / Timing Role: Op amp configured as unity-gain buffer with resistive divider, accepting input up to 18V while operating from 3.3V supply. Use Value: Eliminates level-shifting circuitry; enables direct ADC sampling of battery voltage without external FET or resistor network. |
Use Scenario: Measuring load current in a 5V-powered motor driver by amplifying voltage across a 50mΩ shunt resistor. IC Role / Device Role / Timing Role: High-side current-sense amplifier with V– tied to load ground and V+ to 5V, rejecting common-mode voltage up to 18V. Use Value: Maintains accuracy during motor startup surges where shunt voltage exceeds 5V; supports bidirectional current detection. |
| Industrial Sensor Signal Conditioning | 4–20mA Transmitter Output Stage |
|
Use Scenario: Amplifying low-level mV outputs from RTD or thermocouple sensors in a factory-floor PLC analog input module. IC Role / Device Role / Timing Role: Precision non-inverting amplifier with gain set by thin-film resistors, operating from ±5V rails with full rail-to-rail swing. Use Value: Delivers 16-bit-equivalent linearity over –40°C to 85°C without calibration; rejects supply noise via 90dB PSRR. |
Use Scenario: Driving 4–20mA loop current through 600Ω load in a process transmitter, powered from 24V loop supply. IC Role / Device Role / Timing Role: Output buffer in two-wire transmitter topology, sinking loop current while maintaining precise compliance voltage. Use Value: Sustains 20mA into 600Ω with <100mV headroom; rail-to-rail output ensures full 16mA span utilization without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1782CS5#TRMPBF | Lower power (55μA vs 750μA), lower GBW (1.2MHz), higher offset (800μV max), same Over-The-Top® capability and package. | Better suited for ultra-low-power battery devices where speed <1MHz suffices; less suitable for 4–20mA transmitters requiring >15mA drive. | Select LT1782CS5#TRMPBF only if supply current <100μA is mandatory and bandwidth ≤1.2MHz acceptable. |
| LT1797CS5#TRMPBF | Higher speed (10MHz GBW, 2.25V/μs SR), no Over-The-Top® operation, same rail-to-rail I/O and 5-lead TSOT-23 package. | Applicable where input stays within supply rails (e.g., post-regulator sensor signals); unsuitable for battery monitoring above V+. | Choose LT1797CS5#TRMPBF when bandwidth >5MHz is required and input common-mode never exceeds V+. |
Compared with LT1782CS5#TRMPBF and LT1797CS5#TRMPBF, the LT1784IS5#TRMPBF uniquely balances 2.5MHz bandwidth, Over-The-Top® input capability, and industrial temperature grade - making it the only option among the three qualified for unregulated battery sensing in harsh environments.
Availability
LT1784IS5#TRMPBF is available at Aetrix Electronics and suitable for battery voltage monitoring, industrial sensor conditioning, 4–20mA transmitter design, and supply current sensing requiring stable component supply across extended temperature ranges.
Supply support for LT1784IS5#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 technical and manufacturing continuity for legacy Linear op amps including the LT1784 family.
The LT1784 series was designed specifically for industrial and automotive signal conditioning where inputs exceed the positive supply rail - delivering Over-The-Top® operation, rail-to-rail swing, and robust fault tolerance in miniature TSOT-23 packages.
FAQ
Does LT1784IS5#TRMPBF support shutdown functionality?
No, the LT1784IS5#TRMPBF is the 5-lead variant and does not include a shutdown pin. Shutdown is only available on the 6-lead versions (e.g., LT1784IS6#TRMPBF). The LT1784IS5#TRMPBF draws ≤750μA continuously and cannot be disabled externally.
What is the maximum input voltage allowed on LT1784IS5#TRMPBF pins relative to V–?
The LT1784IS5#TRMPBF permits input voltages up to +24V relative to V– (per Absolute Maximum Ratings), and its Over-The-Top® architecture ensures functional operation with inputs ≥1V above V+ or ≤9V below V–, with full 18V differential tolerance.
Can LT1784IS5#TRMPBF drive a 10kΩ load to both supply rails?
Yes - the LT1784IS5#TRMPBF delivers rail-to-rail output swing: within 4mV of V– and 80mV of V+ at no load, and maintains ≥15mA sink/source capability, enabling full swing into 10kΩ loads with <0.1% linearity error across –40°C to 85°C.
Is LT1784IS5#TRMPBF compatible with 3V single-supply operation?
Yes - the LT1784IS5#TRMPBF is fully specified at 3V total supply (V+ = 3V, V– = 0V), with guaranteed parameters including 2.5MHz GBW, 2.1V/μs slew rate, and rail-to-rail I/O. Input common-mode extends from 0V to 18V, supporting wide-range sensing.
How does LT1784IS5#TRMPBF handle reverse battery connection?
When subjected to reverse supply voltage up to –18V, the LT1784IS5#TRMPBF draws <1nA quiescent current due to integrated reverse-battery protection - eliminating external diodes and preventing damage or system reset in automotive and portable equipment.
LT1784IS5#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:
- 500µA
- Current - Output / Channel:
- 27 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 18 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT1784IS5#TRMPBF FAQ
1.How can I place an order for LT1784IS5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1784IS5#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 LT1784IS5#TRMPBF reliable?
The price and inventory of LT1784IS5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1784IS5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT1784IS5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1784IS5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1784IS5#TRMPBF?
LT1784IS5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1784IS5#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 LT1784IS5#TRMPBF?
For technical support, including LT1784IS5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1784IS5#TRMPBF requirements.
6.How does Aetrix verify that LT1784IS5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT1784IS5#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 LT1784IS5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT1784IS5#TRMPBF?
All LT1784IS5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1784IS5#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 LT1784IS5#TRMPBF part is unused and in its original packaging.
Return procedure for LT1784IS5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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