Texas Instruments OPA2348AIDRG4

Overview

OPA2348AIDRG4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply applications. It delivers 1 MHz gain-bandwidth, 45 µA quiescent current per channel, and operates from 2.1 V to 5.5 V supply. Its 0.5 pA input bias current and ±25 mV output swing near rails make it ideal for high-impedance sensor buffering in battery-powered smoke detectors and CO monitors.

For engineers reviewing the OPA2348AIDRG4 datasheet, OPA2348AIDRG4 pinout, OPA2348AIDRG4 application, or OPA2348AIDRG4 equivalent, key selection criteria include ultra-low IQ, rail-to-rail I/O performance across –40°C to +125°C, input common-mode range extending 200 mV beyond supplies, and verified drive capability for 12-bit ADCs like ADS7822.

Technical Context

The OPA2348AIDRG4 uses a complementary N/P-channel input stage enabling rail-to-rail input operation with no phase inversion when inputs exceed supply rails (within absolute max limits). Its class AB output stage supports rail-to-rail output swing down to 18 mV from rails under light loads and maintains >90 dB open-loop gain at 100 kΩ load.

Designed for unity-gain stability, it drives up to 250 pF capacitive loads directly; stability with larger loads is enhanced via series output resistance or feedback capacitance. Input offset voltage is specified at 1–5 mV (typ/max), with drift of 4 µV/°C over full temperature range.

Key Specifications

Pinout & Package

OPA2348AIDRG4 is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with exposed pad not present. Pin functions are electrically validated per TI SBOS213H Rev H.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, low-power op amp applications.

Compared with MCP6022-I/SN and TLV2462IDR, OPA2348AIDRG4 uniquely balances 1 MHz bandwidth, 45 µA IQ, and −40°C to +125°C operation in SOIC-8 - making it the only option qualified for long-life, wide-temperature, single-supply safety-critical sensing.

Availability

OPA2348AIDRG4 is available at Aetrix Electronics and suitable for smoke detection, CO monitoring, and portable medical instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for OPA2348AIDRG4 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers and low-power signal chain solutions.

The OPAx348 product line was designed specifically for ultra-low-power, single-supply sensor interface applications - targeting battery-operated safety, environmental, and portable medical devices demanding rail-to-rail performance across industrial temperature ranges.

FAQ

What is the maximum capacitive load the OPA2348AIDRG4 can drive in unity-gain configuration?

The OPA2348AIDRG4 can directly drive up to 250 pF of pure capacitive load while maintaining stability in unity-gain configuration. For loads exceeding this, TI recommends adding a 10–20 Ω series resistor at the output or using feedback capacitance (e.g., 4–6 pF) to suppress overshoot. These techniques preserve DC accuracy while ensuring robust transient response in ADC driver applications involving the OPA2348AIDRG4.

Does the OPA2348AIDRG4 support true rail-to-rail input when powered from 2.1 V supply?

Yes, the OPA2348AIDRG4 supports rail-to-rail input operation from 2.1 V to 5.5 V supply, with common-mode range specified from (V−) − 0.2 V to (V+) + 0.2 V across the full temperature range. At 2.1 V supply, this means inputs can be as low as −0.2 V and as high as +2.3 V - critical for interfacing with grounded or supply-referenced sensors without external level-shifting circuitry in the OPA2348AIDRG4 design.

What is the input offset voltage specification for OPA2348AIDRG4 over temperature?

The OPA2348AIDRG4 has a maximum input offset voltage of 6 mV over the full operating temperature range of −40°C to +125°C, with typical value of 1 mV at 25°C. Its offset voltage drift is specified at 4 µV/°C, ensuring predictable calibration behavior in wide-temperature applications such as automotive cabin CO sensors or industrial process controllers using the OPA2348AIDRG4.

Can OPA2348AIDRG4 operate with input voltages exceeding the supply rails?

Yes - the OPA2348AIDRG4 allows input voltages up to (V−) − 0.5 V and (V+) + 0.5 V without damage, though normal linear operation is guaranteed only within (V−) − 0.2 V to (V+) + 0.2 V. Unlike many op amps, it exhibits no phase inversion when inputs exceed rails, provided input current is limited to ≤10 mA using series resistors - a key reliability feature in transient-prone OPA2348AIDRG4 sensor interfaces.

Is OPA2348AIDRG4 pin-compatible with other dual op amps in SOIC-8 package?

No - the OPA2348AIDRG4 has a unique pinout among TI's dual op amps: OUT A on pin 1, −IN A on pin 2, +IN A on pin 3, V− on pin 4, +IN B on pin 5, −IN B on pin 6, OUT B on pin 7, and V+ on pin 8. This differs from industry-standard dual op amp pinouts (e.g., LM358, TL072), so PCB layout must be verified against the official OPA2348AIDRG4 pin configuration diagram before integration.