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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. LT2079ACS#PBF

Name: LT2079ACS#PBF
Brand: Analog Devices Inc.
SKU: LT2079ACS#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LT2079ACS#PBF

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: LT2079ACS#PBF.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14SO

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Product details

Overview

LT2079ACS#PBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 50µA max supply current per amplifier, 70µV max input offset voltage, and rail-to-ground output swing while sinking current-enabling true micropower instrumentation amplifiers and sensor interfaces without pull-down resistors.

For engineers reviewing the LT2079ACS#PBF datasheet, LT2079ACS#PBF pinout, LT2079ACS#PBF application, or LT2079ACS#PBF equivalent, this device is selected for ultra-low-power, high-precision analog signal conditioning in battery-constrained systems where ground-sinking capability, low noise (0.6µV_P-P, 0.1Hz–10Hz), and guaranteed industrial-grade matching are critical.

Technical Context

The LT2079ACS#PBF integrates four matched NPN-input op amps in a single 14-pin SOIC package, with all-NPN output stages enabling output swing to within 4mV of ground while sinking 100µA-eliminating need for power-wasting pull-down resistors. Its design prioritizes precision under micropower constraints: offset voltage is trimmed at 5V/0V supplies, and phase reversal protection prevents output inversion when inputs dip to –1V.

It operates from 2.2V minimum single supply or ±15V dual supply, with guaranteed specifications over 0°C to 70°C (C-grade). Input common-mode range extends below ground (–0.3V min), CMRR is 95dB min, PSRR is 100dB min, and channel separation exceeds 110dB at low frequencies-supporting tightly coupled multi-amplifier topologies like 3-op-amp instrumentation amps.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current per Amp	43–60 µA - enables 4-channel analog front-end with <240 µA total quiescent draw from single Li-ion cell.
Input Offset Voltage	35–110 µV (typ/max) - supports 16-bit-equivalent DC accuracy in gain-of-100 sensor amplifiers without trimming.
Gain Bandwidth Product	200 kHz - sufficient for anti-aliasing filters, low-frequency transducer conditioning, and 40Hz notch filter implementation (TA10).
Output Swing (Low)	<6 mV above ground (no load) - eliminates external pull-downs, reducing BOM count and leakage paths in portable medical sensors.
Voltage Noise (0.1–10Hz)	0.6 µV_P-P - ensures sub-1µV drift-limited resolution in thermocouple amplifiers (TA01) and micropower sample-and-hold circuits.
Input Bias Current	6–10 nA - allows use of 1MΩ+ feedback/source resistors in high-impedance pH or photodiode interfaces without significant error.
Common-Mode Range	–0.3V to 3.5V (VS = 5V) - accommodates signals below ground in single-supply bridge sensor configurations.

Pinout & Package

LT2079ACS#PBF is housed in a 14-lead plastic SOIC (S package) with standard pinout compatible with industry-wide PCB footprints for quad op amps.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT A	Amplifier A output - capable of sourcing/sinking 5mA; swings to ground while sinking current.
2	–IN A	Inverting input of Amp A - high-impedance NPN input stage; protected against –5V input faults.
3	+IN A	Non-inverting input of Amp A - same ESD and phase-reversal protection as Pin 2.
4	V+	Positive supply rail - accepts 2.2V to 22V; bypassing with 0.1µF improves settling time.
5	+IN B	Non-inverting input of Amp B - matched to Amp A for differential applications (e.g., TA06).
6	–IN B	Inverting input of Amp B - matched offset and drift with Amp A; used in 3-op-amp IA topologies.
7	OUT B	Amplifier B output - identical drive and swing specs as OUT A; shares V+ and V– rails.
8	OUT D	Amplifier D output - fully independent; used in programmable-gain (TA09) or dead-zone (TA12) circuits.
9	–IN D	Inverting input of Amp D - supports precision comparator mode (F03/F04) with TTL-compatible output swing.
10	+IN D	Non-inverting input of Amp D - referenced to ground or bias network in absolute-value (TA08) or multiplier (TA11) apps.
11	V–	Negative supply rail - tied to ground in single-supply configs; supports –22V in dual-supply operation.
12	+IN C	Non-inverting input of Amp C - used in multi-stage filtering (TA10) or bias-current cancellation (TA05).
13	–IN C	Inverting input of Amp C - matched to other channels; enables high-common-mode rejection in 3-op-amp IAs.
14	OUT C	Amplifier C output - drives feedback networks in active filters or reference buffers (TA03/TA04).

Key Features

Feature	Design Value
Rail-to-ground output sink	Outputs swing to ≤6 mV above ground while sinking 100 µA - removes need for external pull-down resistors in micropower designs.
Phase reversal protection	Guaranteed non-inverting output behavior even with inputs driven to –1 V - prevents lockup in servo loops and sensor interfaces.
Picoampere-level input bias	6–10 nA max bias current - enables megohm-level source impedances in pH electrodes, piezoelectric sensors, and high-Z filter networks.
Matched quad architecture	Offset match ≤110 µV (98% yield) between A/D and B/C pairs - critical for 3-op-amp instrumentation amplifiers and precision difference amps.
Single-supply optimized trim	Offset voltage trimmed at 5V/0V - delivers best DC accuracy in battery-powered systems without recalibration at other voltages.

Applications

Thermocouple Amplifier	Micropower Instrumentation Amplifier
Use Scenario: Amplifying µV-level thermocouple outputs in portable environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: LT2079ACS#PBF serves as the first-stage low-noise, low-drift amplifier with matched input pairs (A/B) and ground-sinking output for bias current cancellation. Use Value: 0.6µV_P-P noise and 70µV max V_OS enable <1°C measurement resolution over 0–100°C without calibration; 50µA/amp supply current extends battery life to >5 years.	Use Scenario: Building a 3-op-amp instrumentation amplifier for strain-gauge bridges in handheld test equipment. IC Role / Device Role / Timing Role: LT2079ACS#PBF provides three matched amplifiers (A, B, C) for gain-setting and output buffering, leveraging its 110µV max inter-amplifier V_OS match. Use Value: Matched offset and CMRR >95dB minimize common-mode-induced errors; rail-to-ground output allows direct interface to ADC reference rails without level-shifting.
Micropower Sample-and-Hold	Satellite Circuitry
Use Scenario: Low-power data acquisition in remote IoT nodes sampling temperature/pressure at 10Hz with 16-bit resolution. IC Role / Device Role / Timing Role: LT2079ACS#PBF acts as unity-gain buffer and hold amplifier, using Amp D for precision switching control and Amp A/B for input/output isolation. Use Value: 0.4µV/°C max drift and 2.3pA_P-P current noise prevent droop and charge injection errors; 240µW total dissipation avoids thermal drift in sealed enclosures.	Use Scenario: Signal conditioning for radiation-hardened telemetry sensors in LEO satellite subsystems with strict power budgets. IC Role / Device Role / Timing Role: LT2079ACS#PBF implements fault-tolerant sensor interfaces across four independent channels, each with phase-reversal immunity and –1V input tolerance. Use Value: Guaranteed operation from –40°C to 85°C (industrial grade), no latch-up on transient overvoltage, and 150°C T_JMAX support extended mission life in thermal cycling environments.

Thermocouple Amplifier

Micropower Instrumentation Amplifier

Use Scenario: Amplifying µV-level thermocouple outputs in portable environmental monitors powered by coin-cell batteries.

IC Role / Device Role / Timing Role: LT2079ACS#PBF serves as the first-stage low-noise, low-drift amplifier with matched input pairs (A/B) and ground-sinking output for bias current cancellation.

Use Value: 0.6µV_P-P noise and 70µV max V_OS enable <1°C measurement resolution over 0–100°C without calibration; 50µA/amp supply current extends battery life to >5 years.

Use Scenario: Building a 3-op-amp instrumentation amplifier for strain-gauge bridges in handheld test equipment.

IC Role / Device Role / Timing Role: LT2079ACS#PBF provides three matched amplifiers (A, B, C) for gain-setting and output buffering, leveraging its 110µV max inter-amplifier V_OS match.

Use Value: Matched offset and CMRR >95dB minimize common-mode-induced errors; rail-to-ground output allows direct interface to ADC reference rails without level-shifting.

Micropower Sample-and-Hold

Satellite Circuitry

Use Scenario: Low-power data acquisition in remote IoT nodes sampling temperature/pressure at 10Hz with 16-bit resolution.

IC Role / Device Role / Timing Role: LT2079ACS#PBF acts as unity-gain buffer and hold amplifier, using Amp D for precision switching control and Amp A/B for input/output isolation.

Use Value: 0.4µV/°C max drift and 2.3pA_P-P current noise prevent droop and charge injection errors; 240µW total dissipation avoids thermal drift in sealed enclosures.

Use Scenario: Signal conditioning for radiation-hardened telemetry sensors in LEO satellite subsystems with strict power budgets.

IC Role / Device Role / Timing Role: LT2079ACS#PBF implements fault-tolerant sensor interfaces across four independent channels, each with phase-reversal immunity and –1V input tolerance.

Use Value: Guaranteed operation from –40°C to 85°C (industrial grade), no latch-up on transient overvoltage, and 150°C T_JMAX support extended mission life in thermal cycling environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad precision op amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
OP4177ARZ	Lower noise (2.9nV/√Hz), higher supply current (500µA/amp), no ground-sinking output - requires pull-down resistors.	Better for high-speed, low-noise lab equipment; unsuitable for battery-powered ground-referenced sensors.	Select OP4177ARZ only when bandwidth >1MHz and noise <3nV/√Hz are required; avoid where micropower or rail-to-ground sink is needed.
TLV2464IDR	Higher supply current (850µA/amp), wider V_OS range (1.5mV max), rail-to-rail output but not rail-to-ground sink - cannot drive to true 0V while sinking.	Cost-optimized for consumer electronics; lacks phase-reversal protection and picoampere bias current.	Choose TLV2464IDR for non-critical, AC-coupled applications with ample power; reject for precision DC-coupled sensor front-ends.

Compared with OP4177ARZ and TLV2464IDR, the LT2079ACS#PBF uniquely delivers sub-50µA/amp quiescent current *with* guaranteed ground-sinking capability, phase-reversal immunity, and 70µV V_OS - making it irreplaceable in long-life, single-supply, high-DC-accuracy systems where every microamp and microvolt matters.

Availability

LT2079ACS#PBF is available at Aetrix Electronics and suitable for battery-powered instrumentation, remote sensor amplifiers, and satellite telemetry requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LT2079ACS#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and aerospace markets.

The LT2079ACS#PBF belongs to ADI's legacy Linear Technology precision op amp product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in resource-constrained environments - emphasizing DC precision, input protection, and single-supply usability.

FAQ

What is the maximum operating temperature range for the LT2079ACS#PBF?

The LT2079ACS#PBF is rated for the commercial temperature range of 0°C to 70°C. It is not specified or tested for industrial (–40°C to 85°C) operation - that grade is designated LT2079AIS#PBF or LT2079IS#PBF. Using LT2079ACS#PBF outside 0°C–70°C may result in degraded offset drift, CMRR, or output swing performance beyond datasheet limits.

Does the LT2079ACS#PBF require external pull-down resistors to achieve ground output swing?

No, the LT2079ACS#PBF does not require external pull-down resistors. Its all-NPN output stage sinks current down to within 4–6 mV of ground (no load) and 95–130 mV at 100 µA sink current - a key differentiator from competing micropower op amps like OP-290 or HA5141. This feature is explicitly validated in the datasheet (TPC11, TA01) and eliminates unnecessary power loss in battery-powered designs.

Can the LT2079ACS#PBF be used as a precision comparator?

Yes, the LT2079ACS#PBF can be used as a precision comparator in single-supply configurations. Its ability to swing close to ground while sinking current, combined with phase reversal protection (F01a–F01c), makes it suitable for TTL-compatible threshold detection. Rise/fall response times are characterized in F03/F04, though dedicated comparators offer faster propagation delay and open-collector outputs.

What is the minimum supply voltage for reliable operation of the LT2079ACS#PBF?

The LT2079ACS#PBF operates reliably down to 2.2 V total supply (V+ to V–), as specified in the Electrical Characteristics table. At 1.8 V, it remains functional but exhibits a typical offset skew of –300 µV - not guaranteed. For production designs, 2.2 V is the validated lower limit ensuring full specification compliance including V_OS, CMRR, and output swing.

How does the LT2079ACS#PBF handle input voltages below ground?

The LT2079ACS#PBF includes internal series input resistors that protect against destructive current flow when inputs fall up to 5 V below ground. Unlike LM124 or OP-220, it avoids substrate conduction and phase reversal - output remains stable even with –1 V applied to inputs (F01a). However, the guaranteed common-mode range is –0.3 V minimum at VS = 5V/0V; operation below this is safe but uncharacterized.

LT2079ACS#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: LT®

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: -

Slew Rate:: 0.07V/µs

Gain Bandwidth Product:: 200 kHz

-3db Bandwidth:: -

Current - Input Bias:: 6 nA

Voltage - Input Offset:: 60 µV

Current - Supply:: 46µA (x4 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:: 14-SO

LT2079ACS#PBF FAQ

1.How can I place an order for LT2079ACS#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LT2079ACS#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 LT2079ACS#PBF reliable?

The price and inventory of LT2079ACS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2079ACS#PBF is usually 5 days.

3.What payment methods are accepted for LT2079ACS#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2079ACS#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LT2079ACS#PBF?

LT2079ACS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LT2079ACS#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 LT2079ACS#PBF?

For technical support, including LT2079ACS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2079ACS#PBF requirements.

6.How does Aetrix verify that LT2079ACS#PBF is sourced from the original manufacturer or authorized distributors?

All LT2079ACS#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 LT2079ACS#PBF meets industry standards.

7.What is the process for return or replacement of LT2079ACS#PBF?

All LT2079ACS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2079ACS#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 LT2079ACS#PBF part is unused and in its original packaging.

Return procedure for LT2079ACS#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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