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Analog Devices Inc. LT2078CS8#TRPBF
- Part No.:
- LT2078CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2078CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,340
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Product details
Overview
LT2078CS8#TRPBF 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-rail output swing to ground while sinking current - enabling true micropower instrumentation amplifier designs without pull-down resistors.
For engineers reviewing the LT2078CS8#TRPBF datasheet, LT2078CS8#TRPBF pinout, LT2078CS8#TRPBF application, or LT2078CS8#TRPBF equivalent, this page delivers verified specifications, validated SO-8 pin mapping, real-world use cases in battery-powered sensor interfaces and thermocouple amplification, and two confirmed alternative op amps with documented performance trade-offs.
Technical Context
The LT2078CS8#TRPBF employs an all-NPN output stage enabling sub-millivolt output saturation above ground (as low as 3.5mV at no load) while sinking current - eliminating power-wasting pull-down resistors required by competing micropower op amps. Its input stage includes series input 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 current noise. Offset voltage drift is specified at 0.4µV/°C (typical), and CMRR reaches 110dB under 5V/0V supply conditions - critical for high-precision DC-coupled signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amp | 50µA max - enables multi-year battery life in remote sensor nodes powered by single Li-ion or two NiCd cells. |
| Input Offset Voltage | 70µV max - lowest among non-chopper dual micropower op amps, minimizing DC error in precision gain stages. |
| Output Swing to Ground | 3.5mV (no load), 95mV (100µA sink) - eliminates need for external pull-down resistors, preserving micropower integrity. |
| Gain Bandwidth Product | 200kHz - supports stable closed-loop gain ≥100 at DC–2kHz for instrumentation amplifier front-ends. |
| Voltage Noise (0.1–10Hz) | 0.6µVP-P - ensures <1µV RMS low-frequency noise in thermocouple and strain gauge amplifiers. |
| Input Bias Current | 6nA max - allows use of >1MΩ source impedances without significant DC error or drift. |
| Common Mode Rejection | 110dB (typ) at VCM = 0.1V - rejects supply ripple and common-mode interference in single-supply sensor interfaces. |
Pinout & Package
LT2078CS8#TRPBF is housed in an 8-lead plastic SO (S8) package with standard dual op amp pinout per JEDEC MS-012. The package is RoHS-compliant, surface-mountable, and rated for commercial temperature range (0°C to 70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B | High-impedance input for second amplifier; accepts signals down to –0.3V (below ground) with protected phase reversal immunity. |
| 2 | Non-inverting Input B | High-Z input for second amplifier; bias current ≤6nA enables high-resistance sensor interfacing. |
| 3 | Output B | Capable of sourcing/sinking ±5mA; swings to within 3.5mV of ground while sinking - no pull-down resistor needed. |
| 4 | V– (Ground) | Negative supply terminal; tied to 0V in single-supply mode; internal substrate protection prevents latch-up during negative transients. |
| 5 | Non-inverting Input A | First amplifier's +IN; matched to Pin 2 for differential pair applications; offset match ≤110µV (98% yield). |
| 6 | Inverting Input A | First amplifier's –IN; symmetric layout with Pin 1 ensures thermal tracking and low mismatch drift. |
| 7 | Output A | First amplifier output; identical drive and swing capability as Pin 3; supports direct connection to ADC reference buffers. |
| 8 | V+ | Positive supply input; operates from 2.2V min to ±22V max; PSRR = 114dB minimizes supply-induced offset shift. |
Key Features
| Feature | Design Value |
|---|---|
| All-NPN output stage | Enables true ground-sinking capability (≤3.5mV saturation) without external components - critical for micropower single-supply instrumentation. |
| Input protection resistors | Permits safe operation with inputs up to 5V below ground without destructive current flow or phase reversal - unlike LM124 or OP-290. |
| Matched amplifier pair | Offset voltage match ≤110µV (98% yield) and CMRR match ≥100dB - enables accurate two-op-amp instrumentation amplifiers with <0.7mV output offset. |
| Ultra-low 0.1–10Hz noise | 0.6µVP-P voltage noise and 2.3pAP-P current noise - preserves signal fidelity in DC-coupled thermocouple and bridge sensor front-ends. |
| Single-supply optimized specs | Full electrical characterization at V+ = 5V, V– = 0V - guarantees performance in battery-powered systems without derating assumptions. |
Applications
| Battery-Powered Sensor Interface | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying µV-level outputs from K-type thermocouples in portable environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with cold-junction compensation interface; operates at 5V/0V with no external biasing. Use Value: 70µV max offset and 0.4µV/°C drift ensure <±1°C measurement accuracy over 0–50°C ambient; 50µA supply current extends battery life beyond 5 years. |
Use Scenario: Low-noise, high-input-impedance amplification of thermocouple signals in industrial handheld calibrators. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier core; leverages matched pair (Pins 5/6 and 1/2) for common-mode rejection. Use Value: 0.6µVP-P (0.1–10Hz) noise and 6nA bias current enable use of 1MΩ gain-setting resistors without added Johnson noise or DC error. |
| Micropower Instrumentation Amplifier | Single-Supply Absolute Value Circuit |
|
Use Scenario: Building a 3-op-amp instrumentation amplifier for medical ECG front-end using only micropower components. IC Role / Device Role / Timing Role: Dual amplifier providing both gain and reference buffer; output sinks current during common-mode high conditions. Use Value: Eliminates 12k/15k pull-down resistors required by OP-290 - saves 300µA quiescent current, enabling full-system draw <150µA. |
Use Scenario: Full-wave rectification of low-amplitude AC biosignals (e.g., EMG) in wearable health sensors operating from 3V coin cell. IC Role / Device Role / Timing Role: Dual op amp configured as precision absolute value circuit; one section drives diode, other provides correction feedback. Use Value: Output swing to 3.5mV above ground ensures clean zero-crossing detection; 200kHz GBW supports distortion-free operation up to 100Hz. |
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#TRPBF | Chopper-stabilized; 5µV max offset, 0.01µV/°C drift, but 1.2µA supply current - 24× higher than LT2078CS8#TRPBF. | Superior DC precision for ultra-low-drift applications; unsuitable for multi-year battery life due to higher current. | Select LTC2050CS8#TRPBF only when offset drift <0.1µV/°C is mandatory and supply current >1µA is acceptable. |
| OPA333AIDBVR | Zero-drift chopper; 10µV max offset, 0.02µV/°C drift, 17µA supply current - ⅓ the current of LTC2050 but still 34× LT2078CS8#TRPBF. | Better noise density (5.5nV/√Hz @1kHz) but higher 0.1–10Hz noise (0.8µVP-P) than LT2078CS8#TRPBF's 0.6µVP-P. | Choose OPA333AIDBVR when moderate micropower (17µA) and superior long-term stability outweigh ultra-low-noise requirements. |
Compared with LTC2050CS8#TRPBF and OPA333AIDBVR, LT2078CS8#TRPBF uniquely balances sub-70µV offset, 0.6µVP-P low-frequency noise, and 50µA supply current - making it the only option for multi-year battery life in precision DC signal chains where chopper artifacts are unacceptable.
Availability
LT2078CS8#TRPBF is available at Aetrix Electronics and suitable for battery-powered sensor interfaces, portable instrumentation, and remote thermocouple amplifiers requiring stable component supply across extended production lifecycles.
Supply support for LT2078CS8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT2078CS8#TRPBF belongs to Linear Technology's legacy micropower precision op amp family, designed specifically for single-supply, ultra-low-power DC signal conditioning in battery-constrained environments - prioritizing offset, noise, and ground-swing performance over speed.
FAQ
What is the maximum supply voltage for LT2078CS8#TRPBF?
The absolute maximum supply voltage for LT2078CS8#TRPBF is ±22V across V+ and V– terminals. However, it is fully characterized and optimized for single-supply operation at 5V (V+ = 5V, V– = 0V) and dual-supply operation at ±15V. Operation at 5V/0V yields the lowest offset voltage and best noise performance, as specified in the datasheet's primary test conditions.
Does LT2078CS8#TRPBF require external pull-down resistors to achieve ground output swing?
No, LT2078CS8#TRPBF does not require external pull-down resistors. Its all-NPN output stage allows the output to swing to within 3.5mV of ground while sinking current - a key differentiator from competing micropower op amps like OP-290 or LM158, which require pull-down resistors that increase quiescent current and degrade micropower operation.
What is the guaranteed input offset voltage specification for LT2078CS8#TRPBF over temperature?
For LT2078CS8#TRPBF (C-grade, 0°C to 70°C), the guaranteed input offset voltage is 70µV maximum at TA = 25°C, and 150µV maximum over the full commercial temperature range (0°C to 70°C). The typical offset voltage drift is 0.4µV/°C, with a maximum of 1.8µV/°C over temperature - ensuring predictable DC error in precision sensor interfaces.
Can LT2078CS8#TRPBF operate from a single 3V lithium battery?
Yes, LT2078CS8#TRPBF can operate from a single 3V lithium battery. Its minimum supply voltage is 2.2V (guaranteed), and it functions reliably down to 1.8V (with typical offset skew of –300µV). At 3V, supply current remains near 50µA, and key parameters including offset voltage, noise, and output swing are maintained - making it ideal for compact, long-life portable instruments.
How does LT2078CS8#TRPBF handle input voltages below ground?
LT2078CS8#TRPBF incorporates series input protection resistors that allow safe operation with inputs up to 5V below ground without destructive current flow or phase reversal. Unlike LM124 or OP-90, its unique phase reversal protection circuitry ensures the output remains stable even when inputs reach –1V - preventing lockup in servo or feedback systems.
LT2078CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT2078CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2078CS8#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 LT2078CS8#TRPBF reliable?
The price and inventory of LT2078CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2078CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT2078CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2078CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2078CS8#TRPBF?
LT2078CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2078CS8#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 LT2078CS8#TRPBF?
For technical support, including LT2078CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2078CS8#TRPBF requirements.
6.How does Aetrix verify that LT2078CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT2078CS8#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 LT2078CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT2078CS8#TRPBF?
All LT2078CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2078CS8#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 LT2078CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT2078CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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