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Analog Devices Inc. LT1077IS8#TRPBF
- Part No.:
- LT1077IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1077IS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,176
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Product details
Overview
LT1077IS8#TRPBF from Analog Devices (formerly Linear Technology) is a micropower precision operational amplifier optimized for single-supply 5V operation, featuring 60µA max supply current, 40µV max input offset voltage, 0.5µVP-P (0.1Hz–10Hz) voltage noise, 250kHz gain-bandwidth product, and rail-to-ground output swing while sinking current. It serves as a low-power replacement for OP-07, AD707, and LT1001 in battery-powered sensor interfaces and 4–20mA current loops.
For engineers reviewing the LT1077IS8#TRPBF datasheet, LT1077IS8#TRPBF pinout, LT1077IS8#TRPBF application, or LT1077IS8#TRPBF equivalent, key selection criteria include verified micropower performance under single-supply conditions, confirmed 0.1Hz–10Hz noise floor, validated ±15V compatibility for legacy system upgrades, and documented pin compatibility with industry-standard precision op amps including nulling terminal support.
Technical Context
The LT1077IS8#TRPBF employs an all-NPN output stage enabling true ground-swing capability without pull-down resistors, unlike competing micropower op amps that require external biasing or saturate >600mV above ground. Its input stage includes series protection resistors allowing safe operation with inputs down to –5V relative to V–, preventing phase reversal even at –1.0V input under single-supply conditions.
Internally trimmed offset voltage achieves 40µV maximum at 5V/0V supply, with PSRR of 114dB and CMRR of 104dB ensuring minimal offset drift across supply and common-mode variations. The 0.7Hz 1/f noise corner enables ultra-low-frequency precision in strain gauge and thermocouple amplifiers where 0.1Hz–10Hz noise dominates error budgets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 60µA max at 5V/0V - enables multi-year operation on coin-cell batteries in portable instrumentation. |
| Input Offset Voltage | 40µV max - lowest among micropower op amps, eliminating need for external nulling in most precision DC applications. |
| Voltage Noise (0.1–10Hz) | 0.5µVP-P - supports sub-µV-level signal resolution in low-frequency sensor front-ends without sacrificing power efficiency. |
| Gain-Bandwidth Product | 250kHz - sufficient for 20kHz bandwidth difference amplifiers using megaohm source resistors without stability compromise. |
| Output Swing (Sinking) | ≤6mV above ground with 100µA load - eliminates pull-down resistors, saving >80µA in 4–20mA loop transmitters. |
| Offset Voltage Drift | 0.4µV/°C typical - ensures <1µV total drift over 0°C–70°C industrial temperature range, critical for uncalibrated systems. |
| Common-Mode Range | Extends 0.3V below V– - allows direct interfacing with grounded sensors in single-supply configurations. |
Pinout & Package
S8 package: 8-lead plastic small-outline (narrow, 0.150-inch width), RoHS-compliant, surface-mount, JEDEC MS-012AC compliant. Thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | VOS Trim | Connect external 10kΩ potentiometer wiper to V+ for manual offset nulling; compatible with OP-07/AD707 trimming networks. |
| 2 | Inverting Input (–IN) | Differential input node with 6GΩ common-mode input resistance; protected against phase reversal down to –5V. |
| 3 | Non-Inverting Input (+IN) | Differential input node with 6GΩ common-mode input resistance; accepts signals below ground without latch-up. |
| 4 | V– | Negative supply terminal; supports 0V (ground) or negative rails; input common-mode extends 0.3V below this pin. |
| 5 | NC | No connect - internal die pad; must remain unconnected per datasheet to avoid performance degradation. |
| 6 | Output (OUT) | Class-AB all-NPN output stage; sinks to ≤6mV above ground with 100µA, sources up to 5mA into 2kΩ load. |
| 7 | V+ | Positive supply terminal; operates from 2.2V min to ±22V; PSRR = 114dB minimizes supply-induced offset shifts. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply ground-swing output | Eliminates pull-down resistors in 4–20mA transmitters, reducing quiescent current by >80µA versus OP-90/OP-290. |
| Phase reversal protection | Prevents output inversion when inputs drop to –1.0V, avoiding servo lock-up in closed-loop systems without external clamping. |
| Micropower + precision coexistence | Delivers 2× lower offset voltage and 10× lower 0.1–10Hz noise than LM4250/OP-20 at identical 60µA supply current. |
| Plug-in compatibility | Direct replacement for OP-07, AD707, LT1001, and LT1012 with identical pinout and nulling interface-no PCB changes required. |
| Ultra-low 1/f noise corner | 0.7Hz corner frequency enables stable DC-coupled operation in thermopile and bridge sensor amplifiers without high-pass filtering. |
Applications
| Battery-Powered Sensor Interface | 4–20mA Current Loop Transmitter |
|---|---|
Use Scenario: Amplifying µV-level outputs from RTDs or strain gauges in handheld multimeters powered by CR2032 cells. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with gain of 100 and 20kHz bandwidth. Use Value: 0.5µVP-P low-frequency noise and 40µV offset enable 16-bit-equivalent resolution without calibration, extending battery life beyond 5 years. | Use Scenario: Driving 4–20mA loops in industrial process controllers with 24V supply and remote 250Ω sense resistor. IC Role / Device Role / Timing Role: Voltage-to-current converter output stage with rail-to-ground sink capability. Use Value: Output swings to ≤6mV above ground while sinking 20mA, eliminating 10kΩ pull-down resistors and saving >200µA in quiescent current. |
| Megaohm Source Difference Amplifier | Two-Terminal Current Source |
Use Scenario: Measuring differential voltage across high-impedance pH electrodes or ion-selective membranes with >1MΩ source resistance. IC Role / Device Role / Timing Role: High-common-mode-rejection difference amplifier with 1MΩ feedback network. Use Value: 350pA max offset current and 2.5pAP-P current noise prevent gain error and drift when using 1MΩ resistors, maintaining accuracy without guard traces. | Use Scenario: Generating precise 100µA–10mA currents from a 1.23V reference in portable gas analyzers. IC Role / Device Role / Timing Role: Constant-current source with LT1034 reference and feedback control loop. Use Value: 60µA supply current and 0.4µV/°C offset drift ensure stable current output over temperature with <0.1% error across 0°C–70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-07DP | Higher 1.2mA supply current; 25µV max offset; no ground-swing output - requires pull-down resistor. | Legacy designs requiring lowest possible offset but tolerating higher power and external biasing. | Select only when absolute minimum offset (<25µV) outweighs micropower requirements and board space for pull-down components. |
| AD8603ARZ | 35µA supply current; 25µV max offset; rail-to-rail input/output; 1MHz GBW - wider bandwidth but higher noise (1.5µVP-P). | Low-voltage (1.8V–5.5V) systems needing rail-to-rail I/O and faster settling, not ultra-low 0.1–10Hz noise. | Choose for battery-powered devices operating below 3V or requiring >100kHz bandwidth, accepting higher low-frequency noise. |
Compared with OP-07DP and AD8603ARZ, the LT1077IS8#TRPBF uniquely delivers the lowest 0.1–10Hz noise (0.5µVP-P) among micropower precision op amps while maintaining true ground-sink capability - essential for 4–20mA transmitters and high-impedance sensor interfaces where low-frequency stability and single-supply simplicity are non-negotiable.
Availability
LT1077IS8#TRPBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial 4–20mA current loops, and high-impedance sensor interfaces requiring stable component supply with guaranteed long-term availability.
Supply support for LT1077IS8#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, documentation, and manufacturing continuity for the LT1077 family.
The LT1077 product line was designed specifically for micropower precision analog signal conditioning in single-supply, battery-constrained environments - prioritizing ultra-low 0.1–10Hz noise, ground-swing output, and plug-in compatibility with legacy precision op amps.
FAQ
What is the maximum supply voltage range for LT1077IS8#TRPBF?
The LT1077IS8#TRPBF supports a maximum supply voltage range of ±22V across V+ and V– terminals. Absolute maximum ratings specify differential input voltage up to ±30V and input voltage equal to the positive supply voltage or 5V below the negative supply voltage. Operation at ±15V is fully characterized in the datasheet, with performance metrics including 250kHz GBW and 0.12V/µs slew rate verified under those conditions.
Does LT1077IS8#TRPBF require external nulling components in precision applications?
The LT1077IS8#TRPBF features internally trimmed offset voltage with a maximum of 40µV at 5V/0V, making external nulling unnecessary in most applications. However, pins 1 and 8 are provided for optional external 10kΩ potentiometer connection to V+ if sub-20µV offset is required. This nulling interface is fully compatible with OP-07 and AD707 circuits, enabling drop-in upgrades without layout changes.
Can LT1077IS8#TRPBF operate from a single 3.6V lithium cell?
Yes, the LT1077IS8#TRPBF operates down to a minimum supply voltage of 2.2V, making it fully functional with a single 3.6V lithium cell. At 3.6V, its supply current remains within the 60µA maximum specification, and output swing retains ground-sinking capability with ≤10mV saturation voltage under 100µA load - critical for maintaining accuracy in portable medical and environmental sensors.
How does LT1077IS8#TRPBF handle input voltages below ground?
The LT1077IS8#TRPBF incorporates series input protection resistors enabling safe operation with inputs as low as –5V relative to V–, preventing destructive current flow and phase reversal. Unlike LM124 or OP-90, the LT1077IS8#TRPBF maintains correct polarity at the output even when the inverting input is driven to –1.0V, eliminating risk of servo lock-up in closed-loop systems without external clamping diodes.
Is LT1077IS8#TRPBF pin-compatible with OP-07 and AD707?
Yes, the LT1077IS8#TRPBF is fully pin-compatible with OP-07, AD707, LT1001, and LT1012 in the 8-lead SOIC (S8) package. Pin assignments for V+, –IN, +IN, V–, NC, OUT, and VOS trim terminals match exactly, and the nulling interface (pins 1 and 8) functions identically. This enables direct replacement in existing designs with up to 60× reduction in supply current without PCB or schematic modifications.
LT1077IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.12V/µs
- Gain Bandwidth Product:
- 230 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 56µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1077IS8#TRPBF FAQ
1.How can I place an order for LT1077IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1077IS8#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 LT1077IS8#TRPBF reliable?
The price and inventory of LT1077IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1077IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1077IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1077IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1077IS8#TRPBF?
LT1077IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1077IS8#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 LT1077IS8#TRPBF?
For technical support, including LT1077IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1077IS8#TRPBF requirements.
6.How does Aetrix verify that LT1077IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1077IS8#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 LT1077IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1077IS8#TRPBF?
All LT1077IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1077IS8#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 LT1077IS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1077IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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