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Analog Devices Inc. LT1178SW#PBF
- Part No.:
- LT1178SW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1178SW#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:141
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Product details
Overview
LT1178SW#PBF from Analog Devices (formerly Linear Technology) is a micropower dual precision operational amplifier in a 16-lead plastic SO wide (SW) package, optimized for single-supply operation at 5V with 15–24 µA per amplifier supply current, 80–650 µV input offset voltage, and rail-to-ground output swing while sinking current. It enables ultra-low-power sensor signal conditioning in battery-powered instrumentation.
For engineers reviewing the LT1178SW#PBF datasheet, LT1178SW#PBF pinout, LT1178SW#PBF application, or LT1178SW#PBF equivalent, key selection criteria include guaranteed performance over 0°C to 70°C, picoampere-level input bias/offset currents enabling megaohm source resistor use, sub-1µVP-P 0.1Hz–10Hz voltage noise, and true ground-sinking output without pull-down resistors.
Technical Context
The LT1178SW#PBF employs an all-NPN output stage enabling output swing to within 8–13 mV of ground under no-load sink conditions and ≤190 mV at 100 µA sink current-critical for single-supply systems requiring true zero-volt output capability. Its input stage delivers 0.07–0.7 nA input offset current and 3–8 nA input bias current across temperature, supporting high-impedance transducer interfaces.
It features 60–85 kHz gain-bandwidth product and 0.013–0.04 V/µs slew rate at ±15V or 5V/0V supplies, with common-mode rejection ratio ≥84 dB and power supply rejection ratio ≥86 dB over full operating range-ensuring stable DC precision and AC fidelity in noisy industrial or portable environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amplifier | 15–24 µA at 5V/0V - enables multi-year battery life in remote sensors and portable medical devices. |
| Input Offset Voltage | 80–650 µV (max) - supports high-accuracy DC amplification without external trimming in thermocouple or strain gauge front-ends. |
| Input Offset Current | 0.06–0.50 nA - permits use of >1 MΩ source impedances without significant error voltage buildup. |
| Voltage Noise (0.1Hz–10Hz) | 0.9–2.0 µVP-P - preserves signal integrity in low-frequency, high-gain applications like EEG or pH sensing. |
| Output Swing (Low, No Load) | 8–13 mV above ground - eliminates need for pull-down resistors, reducing power loss and board space in single-supply designs. |
| Common-Mode Rejection Ratio | 84–100 dB - rejects interference from shared ground paths in multi-channel data acquisition systems. |
| Gain-Bandwidth Product | 60–85 kHz - sufficient for anti-aliasing filters, sensor amplifiers, and micropower active filters up to ~10 kHz. |
Pinout & Package
LT1178SW#PBF is housed in a 16-lead plastic SO wide (SW) package (JEDEC MS-013AC), with thermal resistance θJA = 150°C/W and maximum junction temperature TJMAX = 110°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN A | Inverting input of Amplifier A - high-impedance node (≥12 GΩ common-mode) for differential or inverting configurations. |
| 2 | OUT A | Output of Amplifier A - capable of sourcing/sinking ±5 mA and swinging to within 13 mV of ground when sinking. |
| 3 | V+ | Positive supply rail - accepts 2.0–22 V (single supply) or ±1.5–±22 V (dual supply); minimum functional voltage is 1.7 V. |
| 4 | OUT B | Output of Amplifier B - independently buffered; shares same output drive and rail-swing specs as OUT A. |
| 5 | +IN A | Non-inverting input of Amplifier A - matched to –IN A for CMRR optimization; operates down to 0.05 V below V–. |
| 6 | V– | Negative supply rail - tied to ground in single-supply mode; supports inputs down to 5 V below V–. |
| 7 | +IN B | Non-inverting input of Amplifier B - electrically isolated from +IN A; enables independent dual-channel signal paths. |
| 8 | –IN B | Inverting input of Amplifier B - identical input characteristics to –IN A; supports high-Z feedback networks. |
| 9–16 | NC | No-connect terminals - unused pins; must remain unconnected per datasheet to avoid parasitic coupling or latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 15–24 µA per amplifier at 5V/0V enables >5-year battery life in coin-cell-powered IoT nodes. |
| Rail-to-ground output | Output sinks to ≤13 mV above ground with no pull-down resistors - reduces component count and quiescent power in 0–5 V systems. |
| Picoampere input bias | 3–8 nA input bias current allows direct interface with high-impedance sources (e.g., piezoelectric sensors, pH electrodes). |
| Low 0.1Hz–10Hz noise | 0.9 µVP-P voltage noise ensures minimal drift and error in DC-coupled, low-frequency measurement chains. |
| Single-supply optimized | Input common-mode range extends 5 V below V– and to V+, supporting ground-referenced inputs and outputs in 5 V systems. |
| Guaranteed performance | Specified over 0°C to 70°C ambient (SW grade) with tested VOS, IOS, CMRR, PSRR, and output swing - no derating required for commercial applications. |
Applications
| Battery-Powered Sensor Interface | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Signal conditioning for remote temperature sensors powered by AA batteries or energy-harvesting circuits. IC Role / Device Role / Timing Role: Dual op amp providing low-noise, low-drift amplification and cold-junction compensation. Use Value: 15 µA per amplifier extends battery life beyond 10 years; 0.6 µV/°C offset drift minimizes calibration frequency. |
Use Scenario: High-precision analog front-end for industrial temperature monitoring with Type K or J thermocouples. IC Role / Device Role / Timing Role: Instrumentation-grade amplifier rejecting common-mode noise while preserving microvolt-level Seebeck signals. Use Value: 84–100 dB CMRR suppresses ground-loop interference; picoampere IOS prevents error from thermocouple wire resistance. |
| Micropower Sample-and-Hold | Portable Medical Instrumentation |
|
Use Scenario: Low-power data acquisition in handheld multimeters or environmental loggers sampling at <1 kSPS. IC Role / Device Role / Timing Role: Dual amplifier implementing unity-gain buffer and hold capacitor driver with minimal droop. Use Value: 0.07 nA IOS limits hold capacitor leakage; 0.9 µVP-P noise preserves resolution in 16-bit ADC systems. |
Use Scenario: Front-end amplification in wearable ECG or pulse oximetry devices powered by CR2032 cells. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input/output dual op amp for biopotential signal gain and filtering. Use Value: Output swing to ground enables single-supply 0–3.3 V ADC interfacing; 24 µA total quiescent current meets strict power budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1178S8#PBF | Same die, 8-lead SOIC-N package; lower max VOS (60–350 µV) but narrower temp range (0°C–70°C); θJA = 200°C/W. | Preferred for space-constrained PCBs where dual-amplifier density matters more than thermal margin. | Select LT1178S8#PBF only if board layout requires 8-pin SOIC footprint and thermal load remains below 110°C junction. |
| OPA2333AIDR | Zero-drift architecture; 0.02 µV/°C drift vs. 0.6–4.5 µV/°C for LT1178SW; higher supply current (17 µA vs. 15–24 µA); 36 V max supply. | Better for long-term DC stability in uncalibrated systems; less suitable for ultra-low-power or 5 V–only designs. | Choose OPA2333AIDR when offset drift dominates error budget; retain LT1178SW#PBF for lowest quiescent power in 5 V battery systems. |
Compared with LT1178S8#PBF, LT1178SW#PBF trades smaller footprint for superior thermal performance and guaranteed 16-pin routing flexibility; versus OPA2333AIDR, it delivers 30% lower supply current at the cost of higher long-term drift-making it optimal for cost-sensitive, battery-limited precision analog front-ends.
Availability
LT1178SW#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and micropower filter designs requiring stable component supply across extended production lifecycles.
Supply support for LT1178SW#PBF 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 documentation for legacy Linear op amps including the LT1178 series.
The LT1178 family was designed specifically for micropower, single-supply precision signal conditioning in portable and remote measurement systems-prioritizing ultra-low IQ, rail-to-ground output, and picoampere input leakage over speed or rail-to-rail input.
FAQ
What is the maximum operating temperature range for LT1178SW#PBF?
The LT1178SW#PBF is specified for operation from 0°C to 70°C ambient temperature. This SW-grade rating is explicitly defined in the datasheet's "Operating Temperature Range" table and applies to all electrical characteristics unless otherwise noted. Junction temperature must not exceed 110°C, and thermal design should account for θJA = 150°C/W in typical PCB layouts. The LT1178I variant extends to –40°C to 85°C but uses different packaging.
Does LT1178SW#PBF support true single-supply operation with input voltages below ground?
Yes, LT1178SW#PBF supports true single-supply operation with inputs extending 5 V below the negative supply rail (V–). When V– = 0 V (ground), the input common-mode range includes –5 V to V+, enabling ground-referenced or slightly negative inputs without level-shifting circuitry. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, where "Input Voltage … 5V Below Negative Supply Voltage" is explicitly stated.
What is the output drive capability of LT1178SW#PBF?
LT1178SW#PBF can source and sink up to ±5 mA per amplifier into resistive loads. Under sink conditions, its output swings to within 8–13 mV of ground with no load and ≤190 mV at 100 µA sink current-verified across temperature and supply conditions. This eliminates external pull-down resistors in 0–5 V systems. Drive capability is limited by thermal constraints: continuous operation above ±3 mA may require heatsinking depending on ambient and PCB copper area.
How does the noise performance of LT1178SW#PBF compare between 0.1Hz–10Hz and broadband conditions?
LT1178SW#PBF delivers 0.9–2.0 µVP-P voltage noise in the 0.1Hz–10Hz band-critical for DC and low-frequency precision. At 10 Hz, voltage noise density is 50 nV/√Hz; at 1 kHz, it drops to 49 nV/√Hz. Current noise is 1.5–2.5 pAP-P (0.1Hz–10Hz), with density of 0.03 pA/√Hz at 10 Hz. This 1/f-dominated profile makes it ideal for sub-100 Hz sensor applications but less suited for high-frequency signal chains.
Can LT1178SW#PBF be used with a 1.8 V supply?
No-LT1178SW#PBF is not characterized or guaranteed for operation at 1.8 V. The datasheet specifies a minimum supply voltage of 2.0 V (with typical functionality down to 1.7 V but with degraded offset voltage skew of –300 µV). At 1.8 V, parameters such as gain-bandwidth, slew rate, and output swing are untested and likely noncompliant. For 1.8 V systems, consider modern micropower op amps like the ADA4505-2 or TLV8542, which are fully specified at that rail.
LT1178SW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 85 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 17µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1178SW#PBF FAQ
1.How can I place an order for LT1178SW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1178SW#PBF 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 LT1178SW#PBF reliable?
The price and inventory of LT1178SW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1178SW#PBF is usually 5 days.
3.What payment methods are accepted for LT1178SW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1178SW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1178SW#PBF?
LT1178SW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1178SW#PBF 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 LT1178SW#PBF?
For technical support, including LT1178SW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1178SW#PBF requirements.
6.How does Aetrix verify that LT1178SW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1178SW#PBF 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 LT1178SW#PBF meets industry standards.
7.What is the process for return or replacement of LT1178SW#PBF?
All LT1178SW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1178SW#PBF, 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 LT1178SW#PBF part is unused and in its original packaging.
Return procedure for LT1178SW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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