Texas Instruments OPA2379AIDCNT

Overview

OPA2379AIDCNT from Texas Instruments is a dual micropower rail-to-rail input/output operational amplifier optimized for battery-powered instrumentation. It delivers 90kHz gain-bandwidth, 2.9µA quiescent current per amplifier, and 1.5mV max input offset voltage across 1.8V–5.5V supply, enabling precision signal conditioning in portable gas meters and handheld test equipment.

For engineers reviewing the OPA2379AIDCNT datasheet, OPA2379AIDCNT pinout, OPA2379AIDCNT application, or OPA2379AIDCNT equivalent, key selection criteria include ultra-low IQ (2.9µA typ), rail-to-rail I/O swing within 10mV of rails at 25kΩ load, 2.8µVPP 0.1Hz–10Hz noise, and guaranteed operation from –40°C to +125°C in SOT-23-8 packaging.

Technical Context

The OPA2379AIDCNT employs a complementary differential input stage enabling rail-to-rail common-mode input range (V– – 0.1V to V+ + 0.1V) and high CMRR (100dB typ). Its unity-gain-stable architecture supports capacitive loads up to 30pF without external compensation, with 0.03V/µs slew rate and 25µs overload recovery time.

Designed for single-supply micro-power systems, it features 5pA max input bias current, 120dB open-loop gain (AOL), and 2µV/V PSRR - critical for maintaining DC accuracy in low-voltage sensor front-ends where supply ripple and common-mode interference must be rejected without increasing power consumption.

Key Specifications

Pinout & Package

SOT-23-8 package (DCN drawing), 2.9mm × 1.6mm × 1.3mm body, moisture sensitivity level 2, RoHS-compliant NIPDAU finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual micropower op amp applications.

Compared with TLV2242IDR and OPA2347UA, the OPA2379AIDCNT uniquely balances sub-3µA quiescent current, 90kHz bandwidth, and 2.8µVPP low-frequency noise - making it optimal for battery-constrained, medium-bandwidth precision analog front-ends where all three parameters are simultaneously critical.

Availability

OPA2379AIDCNT is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable gas detection, medical point-of-care devices, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2379AIDCNT 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op amps and low-power signal chains.

The OPA379 family - including OPA2379AIDCNT - was designed specifically for ultra-low-power, rail-to-rail precision amplification in space- and energy-constrained portable instrumentation, delivering best-in-class trade-offs among quiescent current, noise, and bandwidth.

FAQ

What is the maximum capacitive load the OPA2379AIDCNT can drive without oscillation?

The OPA2379AIDCNT is unity-gain stable and can drive up to 30pF capacitive load without external compensation, as verified in TI's Typical Characteristics (Figure 17). For loads exceeding 30pF - such as ADC input capacitance or long PCB traces - a 10Ω–20Ω series resistor between OPA2379AIDCNT output and the load restores phase margin while preserving DC accuracy, per Figure 21 in the datasheet.

Does the OPA2379AIDCNT support true rail-to-rail input common-mode range?

Yes, the OPA2379AIDCNT supports rail-to-rail input common-mode voltage from (V–) – 0.1V to (V+) + 0.1V, confirmed in Electrical Characteristics Table. However, CMRR degrades above (V+) – 1V due to input stage transition; for highest precision, keep common-mode voltage below that threshold, especially in high-gain configurations.

What is the thermal resistance (θJA) of the OPA2379AIDCNT in its SOT-23-8 package?

The OPA2379AIDCNT in SOT-23-8 (DCN) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions; actual θJA improves with added copper pour or thermal vias beneath the exposed pad (if present) - though the DCN package lacks an exposed thermal pad.

Can the OPA2379AIDCNT operate from a 1.8V single supply while maintaining rail-to-rail output swing?

Yes, the OPA2379AIDCNT is fully specified down to 1.8V supply and delivers rail-to-rail output swing within 10mV of each rail into 25kΩ loads at 25°C, per Electrical Characteristics. At –40°C to +125°C, output swing degrades to within 15mV of rails - still sufficient for 12-bit ADC interfacing with 1.8V references.

Is the OPA2379AIDCNT pin-compatible with other dual op amps in SOT-23-8 packages?

No - the OPA2379AIDCNT uses a non-standard SOT-23-8 pinout (INB, INB+, OUTB, GND, OUTA, INA+, INA–, V+) distinct from industry-standard dual op amp pinouts like LMV358 or TLV2372. Direct replacement requires PCB layout revision; always verify pin mapping using the "PIN CONFIGURATIONS" diagram on page 3 of SBOS347D before design-in.