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Analog Devices Inc. LT2078CS8#PBF
- Part No.:
- LT2078CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2078CS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,096
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Product details
Overview
LT2078CS8#PBF from Analog Devices (formerly Linear Technology) is a micropower dual precision operational amplifier optimized for single-supply operation at 5V, featuring 70µV max input offset voltage, 50µA max supply current per amplifier, and rail-to-ground output swing while sinking current-enabling true micropower instrumentation amplifiers without pull-down resistors.
For engineers reviewing the LT2078CS8#PBF datasheet, LT2078CS8#PBF pinout, LT2078CS8#PBF application, or LT2078CS8#PBF equivalent, this page delivers verified specifications, SO-8 pin mapping, real-world use cases in battery-powered sensor interfaces and thermocouple amplification, and two validated alternative op amps with documented performance trade-offs.
Technical Context
The LT2078CS8#PBF employs an all-NPN output stage enabling output swing to within 6mV of ground under no-load conditions and 130mV at 100µA sink current-eliminating need for power-wasting pull-down resistors. Its input stage includes series protection resistors allowing safe operation with inputs up to 5V below ground without phase reversal or latch-up.
It achieves 200kHz gain bandwidth and 0.07V/µs slew rate while maintaining ultra-low noise: 0.6µVP-P (0.1Hz–10Hz) voltage noise and 2.3pAP-P (0.1Hz–10Hz) current noise-performance two to ten times better than prior micropower op amps across precision, speed, and drive capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 43–60µA (enables multi-year battery life in remote sensors) |
| Input Offset Voltage | 30–70µV (supports µV-level signal conditioning in thermocouple amps) |
| Offset Voltage Drift | 0.4µV/°C (ensures stable DC accuracy over industrial temperature range) |
| Gain Bandwidth Product | 200kHz (sufficient for anti-aliasing filters and low-frequency instrumentation) |
| Output Swing (Low) | ≤6mV above ground (no pull-down resistors needed for single-supply zero-referenced outputs) |
| Input Noise (0.1–10Hz) | 0.6µVP-P voltage, 2.3pAP-P current (preserves SNR in high-impedance transducer interfaces) |
| Common Mode Range | Extends 0.3V below V– (supports inputs below ground in single-supply systems) |
Pinout & Package
LT2078CS8#PBF is housed in an 8-lead plastic SO (S8) package with standard dual op amp pinout compliant with industry conventions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; sinks current to ground without external resistor |
| 2 | –IN A | Inverting input for Amplifier A; protected against –5V transients |
| 3 | +IN A | Non-inverting input for Amplifier A; supports common mode down to V– – 0.3V |
| 4 | V– | Negative supply (GND in single-supply); substrate reference for input protection |
| 5 | +IN B | Non-inverting input for Amplifier B; matched bias current with Pin 3 |
| 6 | –IN B | Inverting input for Amplifier B; phase-reversal protected |
| 7 | OUT B | Amplifier B output; identical rail-to-ground sink capability as Pin 1 |
| 8 | V+ | Positive supply (5V typical); bypassing with 0.1µF improves settling time |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-ground output sink | Outputs swing to ≤6mV above ground while sinking 100µA-eliminates pull-down resistors and saves µA-level power |
| Input phase reversal protection | Operates correctly with inputs down to –1V (vs. GND), preventing lockup in servo systems where inputs transiently undershoot ground |
| Picoampere-level input bias | 6–8nA max bias current enables use with >1MΩ source impedances without significant DC error |
| Ultra-low 0.1–10Hz noise | 0.6µVP-P voltage noise and 2.3pAP-P current noise preserve signal integrity in DC-coupled sensor front-ends |
| Matched dual architecture | Guaranteed ∆VOS ≤110µV (98% yield) between amplifiers-critical for precision difference amplifiers and instrumentation topologies |
Applications
| Thermocouple Amplifier | Micropower Instrumentation Amplifier |
|---|---|
Use Scenario: Amplifying µV-level thermocouple outputs in portable gas detectors with 3V coin-cell power. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with sub-100µV offset and <1µV/°C drift to maintain calibration over temperature. Use Value: Enables direct thermocouple interface without cold-junction compensation circuitry or external chopper stabilization. | Use Scenario: Two-stage gain configuration (LT2078CS8#PBF + LT1034 reference) in handheld multimeters requiring 100ppm accuracy. IC Role / Device Role / Timing Role: Dual op amp providing matched gain and offset rejection in three-op-amp IA topology. Use Value: Delivers <0.7mV output offset and 80µVP-P noise (0.1–10Hz) while drawing only 115µA total from 9V battery. |
| Remote Sensor Signal Conditioning | Satellite Circuitry Bias Reference |
Use Scenario: Signal conditioning for MEMS pressure sensors in wireless IoT nodes powered by Li-ion cells. IC Role / Device Role / Timing Role: Low-power buffer and filter driver with rail-to-ground output for ADC input staging. Use Value: Supports 20kHz bandwidth filtering while consuming <50µA per channel-extending node lifetime beyond 5 years. | Use Scenario: Precision bias generation and monitoring in radiation-tolerant satellite subsystems operating at –40°C to 85°C. IC Role / Device Role / Timing Role: Dual op amp implementing stable 5ppm/°C reference buffer and fault-detection comparator. Use Value: Maintains <120µV offset drift over full temperature range and survives input transients to –5V without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2050CS8#PBF | Zero-drift architecture; 0.5µV max offset, 0.005µV/°C drift-but 175µA supply current per amp | Better DC accuracy but 3.5× higher quiescent current; unsuitable for multi-year battery life | Select when ultra-low drift dominates over power; avoid when >60µA per amp violates system budget |
| OPA333AIDBVR | Auto-zero design; 10µV max offset, 0.05µV/°C drift; 17µA supply current-but only 100kHz GBW and 0.16V/µs slew | Lower power and better DC specs, but insufficient bandwidth for 20kHz anti-aliasing filters | Select for static sensor readouts; avoid when signal bandwidth exceeds 10kHz or output must sink >50µA |
Compared with LTC2050CS8#PBF and OPA333AIDBVR, LT2078CS8#PBF uniquely balances 70µV offset, 50µA supply current, 200kHz bandwidth, and rail-to-ground sinking-making it the only choice for battery-powered instrumentation requiring simultaneous precision, speed, and ultra-low power.
Availability
LT2078CS8#PBF is available at Aetrix Electronics and suitable for battery-powered systems, portable instrumentation, and remote sensor amplifiers requiring stable component supply with guaranteed long-term availability.
Supply support for LT2078CS8#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) designs high-performance analog, mixed-signal, and RF ICs for precision signal conditioning and power management.
The LT2078 product line was engineered specifically for micropower, single-supply precision applications-including thermocouple amplification, portable medical devices, and satellite telemetry-where rail-to-ground output and sub-100µV offset are non-negotiable.
FAQ
What is the maximum supply voltage for LT2078CS8#PBF?
The absolute maximum supply voltage for LT2078CS8#PBF is ±22V. However, it is fully specified and optimized for single-supply operation at 5V (V+ = 5V, V– = 0V) and dual-supply operation at ±15V. Operation at ±22V is permissible but not characterized-designers should verify stability, offset, and output swing under those conditions using the LT2078CS8#PBF's published electrical characteristics table.
Does LT2078CS8#PBF require external pull-down resistors for ground-referenced output?
No, LT2078CS8#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current to within 6mV of ground under no load and 130mV at 100µA sink current. This eliminates power-wasting resistors-critical for micropower designs. The LT2078CS8#PBF datasheet explicitly contrasts this capability with competing op amps (e.g., OP-90, OP-290) that mandate pull-downs to achieve ground swing.
What is the input voltage range specification for LT2078CS8#PBF?
For LT2078CS8#PBF operating on 5V/0V supplies, the input common-mode voltage range extends from –0.3V (0.3V below ground) to +3.8V. This allows safe handling of inputs slightly below ground-enabled by internal series input protection resistors. At ±15V supplies, the range expands to ±13.8V. The LT2078CS8#PBF maintains phase reversal immunity down to –1V input, unlike legacy single-supply op amps.
Can LT2078CS8#PBF be used as a comparator?
Yes, LT2078CS8#PBF can be used as a precision comparator in single-supply systems. Its rail-to-ground output swing, low input offset (70µV max), and ability to sink current without external components make it suitable for TTL-compatible threshold detection. Application Note TA03 shows a comparator configuration with rise/fall response times measured at 200µs/DIV. However, dedicated comparators offer faster propagation delay-LT2078CS8#PBF is best for low-speed, high-precision thresholding where op amp functionality is already required.
What is the guaranteed temperature range for LT2078CS8#PBF?
LT2078CS8#PBF is rated for the commercial temperature range: 0°C to +70°C. It is not tested or guaranteed for operation outside this range. For industrial-grade performance from –40°C to +85°C, the LT2078IS8#PBF variant must be selected. The "C" suffix in LT2078CS8#PBF explicitly denotes commercial temperature grade, and its electrical characteristics (e.g., 70µV max VOS) apply only within 0°C to 70°C.
LT2078CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.07V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 47µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT2078CS8#PBF FAQ
1.How can I place an order for LT2078CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2078CS8#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 LT2078CS8#PBF reliable?
The price and inventory of LT2078CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2078CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT2078CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2078CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2078CS8#PBF?
LT2078CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2078CS8#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 LT2078CS8#PBF?
For technical support, including LT2078CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2078CS8#PBF requirements.
6.How does Aetrix verify that LT2078CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT2078CS8#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 LT2078CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT2078CS8#PBF?
All LT2078CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2078CS8#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 LT2078CS8#PBF part is unused and in its original packaging.
Return procedure for LT2078CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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