Texas Instruments OPA4348AIDRG4

Overview

OPA4348AIDRG4 from Texas Instruments is a quad-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply sensor signal conditioning and ADC driving. It delivers 1 MHz gain-bandwidth, 45 µA per amplifier quiescent current, 0.5 pA input bias current, and operates from 2.1 V to 5.5 V - enabling use in battery-powered smoke alarms, CO detectors, and portable medical instrumentation.

For engineers reviewing the OPA4348AIDRG4 datasheet, OPA4348AIDRG4 pinout, OPA4348AIDRG4 application, or OPA4348AIDRG4 equivalent, key selection criteria include its extended common-mode range (–0.2 V to V_S + 0.2 V), 18 mV output swing from rail (at 100 kΩ), 70 dB minimum CMRR, and TSSOP-14 package compatibility with space-constrained PCB layouts.

Technical Context

The OPA4348AIDRG4 employs a complementary N/P-channel input stage enabling rail-to-rail input operation across –0.2 V to V_S + 0.2 V, with no phase inversion even when inputs exceed supply rails (if current-limited to ≤10 mA). Its class-AB output stage supports rail-to-rail output swing within 18 mV of either rail under light loads.

It is unity-gain stable and drives up to 250 pF capacitive load directly; stability under heavier capacitive loads is enhanced by series output resistance or feedback capacitance. All four amplifiers share common V+ (Pin 4) and V– (Pin 11) supply terminals and operate over –40°C to +125°C.

Key Specifications

Pinout & Package

OPA4348AIDRG4 is packaged in a 14-pin TSSOP (PW package), body size 5.00 mm × 4.40 mm, with exposed pad not electrically connected. Pin numbering follows standard TI TSSOP top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA4348AIDRG4, the OPA4348AIDR offers identical performance in a larger SOIC package ideal for prototyping, while the MCP6004-E/ST trades off temperature range and quiescent current for broader supply flexibility and lower unit cost in consumer applications.

Availability

OPA4348AIDRG4 is available at Aetrix Electronics and suitable for smoke detector manufacturing, portable gas monitor production, and multi-sensor medical device development requiring stable component supply across long product lifecycles.

Supply support for OPA4348AIDRG4 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 chain solutions.

The OPAx348 family was designed specifically for ultra-low-power, single-supply sensor interface and ADC driver applications in safety-critical portable and industrial equipment - emphasizing rail-to-rail operation, nanoampere input bias, and extended temperature reliability.

FAQ

What is the maximum capacitive load the OPA4348AIDRG4 can drive in unity-gain configuration?

The OPA4348AIDRG4 can directly drive up to 250 pF of pure capacitive load while maintaining stability in unity-gain configuration. For loads exceeding this, a 10–20 Ω series resistor at the output improves phase margin without degrading DC accuracy - verified in TI's SBOS213H datasheet Figure 13 and Section 7.3.5.

Does the OPA4348AIDRG4 support operation from a 2.1-V supply?

Yes, the OPA4348AIDRG4 is fully specified and tested from 2.1 V to 5.5 V supply voltage. Electrical characteristics including input offset voltage, CMRR, and open-loop gain remain valid across this full range, as confirmed in Section 6.3 (Recommended Operating Conditions) of the official datasheet.

What is the input common-mode voltage range of the OPA4348AIDRG4?

The OPA4348AIDRG4 features a rail-to-rail input stage with a common-mode range from (V–) – 0.2 V to (V+) + 0.2 V - explicitly stated in Section 6.7 Electrical Characteristics and validated in Figure 19 of the SBOS213H datasheet. This enables direct interfacing with sensors operating near supply rails.

Is the OPA4348AIDRG4 pin-compatible with other OPAx348 variants?

No - the OPA4348AIDRG4 (TSSOP-14) has identical pin functions but different physical pinout spacing versus the SOIC-14 OPA4348AIDR. While both share the same 14-pin assignment order (e.g., Pin 1 = OUT A, Pin 4 = V+), their land patterns are not interchangeable due to differing pitch (0.65 mm TSSOP vs 1.27 mm SOIC).

How does the OPA4348AIDRG4 handle input voltages exceeding the supply rails?

The OPA4348AIDRG4 does not exhibit phase inversion when inputs exceed V+ or go below V–, provided input current is limited to ≤10 mA - a key feature documented in Section 7.3.3 and Figure 20 of SBOS213H. This allows safe interfacing with transient-prone sensors without external clamping diodes.