Texas Instruments OPA314AIDCKT

Overview

OPA314AIDCKT from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, low-power applications. It delivers 3 MHz gain-bandwidth, 1.5 V/µs slew rate, and 14 nV/√Hz input voltage noise at 1 kHz - all while consuming only 150 µA quiescent current per channel across 1.8 V to 5.5 V supply. It enables precision signal conditioning in battery-powered instrumentation such as portable medical sensors and photodiode front-ends.

For engineers reviewing the OPA314AIDCKT datasheet, OPA314AIDCKT pinout, OPA314AIDCKT application, or OPA314AIDCKT equivalent, key selection criteria include its 0.5 mV typical offset voltage, 0.2 pA input bias current, integrated RF/EMI filter, unity-gain stability with up to 300 pF capacitive load, and extended –40°C to 125°C operating range - critical for compact, high-reliability analog signal chains.

Technical Context

The OPA314AIDCKT employs a complementary differential input stage (N- and P-channel pairs) enabling rail-to-rail common-mode input range extending 200 mV beyond both supply rails. Its Class AB output stage drives ≥10 kΩ loads across the full supply range with <60 mV output swing from rails at 5.5 V.

It features an integrated RF/EMI rejection filter on the noninverting input, delivering >70 dB EMIRR at 100 MHz, and includes robust ESD protection (±4 kV HBM). No phase reversal occurs under overdrive, and it remains unity-gain stable without external compensation.

Key Specifications

Pinout & Package

OPA314AIDCKT is packaged in a 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained PCB layouts and thermal performance (R_θJA = 281.4°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with MCP6001T-E/OT and TLV9001IDCKR, OPA314AIDCKT uniquely balances 3 MHz bandwidth, 150 µA IQ, and integrated EMI filtering - making it optimal for battery-powered, noise-immune analog signal chains where size, speed, and robustness are jointly constrained.

Availability

OPA314AIDCKT is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode amplifiers, and active filters requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for OPA314AIDCKT 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 amplifiers and low-power signal conditioning.

The OPA314AIDCKT belongs to TI's OPAx314 family - engineered specifically for portable, battery-operated systems demanding rail-to-rail performance, ultra-low power, and inherent EMI resilience without external components.

FAQ

What is the maximum capacitive load the OPA314AIDCKT can drive while remaining stable?

The OPA314AIDCKT is unity-gain stable with capacitive loads up to 300 pF, as confirmed in the datasheet's Small-Signal Overshoot vs Load Capacitance plot (Figure 20) and Functional Block Diagram section. This eliminates need for isolation resistors in most sensor and ADC driver configurations. For loads exceeding 300 pF, external compensation or a buffer stage is recommended. The OPA314AIDCKT maintains >65° phase margin under these conditions.

Does the OPA314AIDCKT support true rail-to-rail input operation below the negative supply rail?

Yes - the OPA314AIDCKT's input common-mode range extends to (V–) – 0.2 V, verified in Electrical Characteristics (Table 6.7, "Input Voltage Range"). This enables accurate sensing of signals referenced slightly below ground, such as thermocouple outputs or shunt-based current measurements with bidirectional flow. The OPA314AIDCKT achieves this via complementary N- and P-channel input pairs.

What is the typical input offset voltage drift over temperature for the OPA314AIDCKT?

The OPA314AIDCKT exhibits a typical offset voltage drift of 1 µV/°C, as specified in the Electrical Characteristics table under "dVOS/dT vs Temperature". This low drift ensures minimal calibration drift across –40°C to 125°C, supporting high-accuracy applications like medical sensors and industrial process monitoring without frequent recalibration. The OPA314AIDCKT's drift distribution is shown in Figure 6 of the datasheet.

Can the OPA314AIDCKT operate from a 1.8 V single supply and still achieve rail-to-rail output swing?

Yes - the OPA314AIDCKT delivers rail-to-rail output swing down to 1.8 V supply, with typical output voltage swing within 15 mV of each rail (V– and V+) under 2 kΩ load, as documented in Table 6.7 ("Voltage output swing from supply rails"). At 1.8 V, this yields >1.77 V usable output range, maximizing dynamic range for low-voltage ADCs. The OPA314AIDCKT's Class AB output stage enables this performance without external charge pumps.

Is the OPA314AIDCKT pin-compatible with other members of the OPAx314 family?

No - the OPA314AIDCKT (single-channel, SC70-5) is not pin-compatible with OPA2314 (dual, 8-pin) or OPA4314 (quad, 14-pin) variants. Pin mapping differs across channel counts and packages: OPA314AIDCKT uses pins 1 (+IN), 2 (V–), 3 (–IN), 4 (OUT), 5 (V+), while dual/quad versions allocate separate pins per channel. Always verify pinout using the "Pin Configuration and Functions" section (page 5) of the SBOS563G datasheet before board reuse.