Texas Instruments OPA2340UAG4

Overview

OPA2340UAG4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for single-supply, low-voltage operation (2.7 V to 5.5 V). It delivers 5.5 MHz gain-bandwidth, 6 V/µs slew rate, and output swing within 1 mV of rails under 100-kΩ load - enabling high-fidelity signal conditioning in A/D converter driver and audio front-end applications.

For engineers reviewing the OPA2340UAG4 datasheet, OPA2340UAG4 pinout, OPA2340UAG4 application, or OPA2340UAG4 equivalent, key selection criteria include rail-to-rail I/O performance at 5 V supply, low 750 µA/channel quiescent current, THD+N of 0.0007% at 1 kHz, and compatibility with space-constrained designs using the 3.00 mm × 3.00 mm VSSOP-8 package.

Technical Context

The OPA2340UAG4 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 500 mV beyond both supply rails. Its class AB output stage supports rail-to-rail output swing while maintaining >106 dB open-loop gain at 100-kΩ load.

Designed for unity-gain stability, it drives capacitive loads up to 1000 pF without external compensation and achieves 1 µs 0.1% settling time on a 2-V step with 100-pF load - critical for driving sampling ADCs like the ADS7816 in noninverting configurations.

Key Specifications

Pinout & Package

The OPA2340UAG4 is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for high-density PCB layouts and thermal performance (R_θJA = 169.2°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual rail-to-rail op-amp applications.

Compared with OPA2340UAG4, OPA2340UA offers identical performance in a smaller reel quantity, while MCP6022-E/SN trades bandwidth and output precision for lower unit cost - making OPA2340UAG4 optimal for precision, low-power, space-constrained dual-op-amp roles.

Availability

OPA2340UAG4 is available at Aetrix Electronics and suitable for data acquisition, portable audio, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for OPA2340UAG4 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 data converters.

The OPA2340UAG4 belongs to TI's MicroAmplifier™ series, designed specifically for low-voltage, single-supply signal conditioning in space- and power-constrained applications such as portable instrumentation and battery-operated sensors.

FAQ

What is the maximum operating supply voltage for the OPA2340UAG4?

The OPA2340UAG4 supports a maximum supply voltage of 5.5 V across V+ and V– terminals. Operation above this rating risks permanent damage. The device is fully specified from 2.7 V to 5 V, with functional operation verified down to 2.5 V - making it suitable for Li-ion battery systems where voltage drops to ~2.7 V under load. Always observe absolute maximum ratings in the official datasheet.

Does the OPA2340UAG4 require external compensation for unity-gain stability?

No, the OPA2340UAG4 is internally compensated for unity-gain stability. It maintains phase margin >45° with purely capacitive loads up to 1000 pF in unity-gain configuration. For loads exceeding 1000 pF or in high-gain configurations with reactive feedback networks, consult Figure 21 in the SBOS073C datasheet for stability boundary guidance. No external compensation components are needed for standard use cases.

Can the OPA2340UAG4 drive a 600-Ω load effectively?

Yes, the OPA2340UAG4's class AB output stage can drive 600-Ω loads, though output swing is reduced compared to high-impedance loads. At 5 V supply, it delivers ±2.4 V output swing into 600 Ω (per Figure 15), maintaining >94 dB open-loop gain. For full rail-to-rail swing, use loads ≥10 kΩ. When driving 600 Ω, verify THD+N remains within spec (<0.0007%) for your signal amplitude and frequency.

What is the input common-mode voltage range of the OPA2340UAG4?

The OPA2340UAG4 features a rail-to-rail input stage with a common-mode voltage range extending 500 mV beyond both supply rails - i.e., from –0.3 V to +5.3 V at V_S = 5 V. This allows direct interfacing with 0–5 V reference sources and accommodates signals slightly outside the supply domain when current-limited to ≤10 mA. Performance parameters like PSRR and CMRR may degrade within the 400-mV transition region near V+ – 1.3 V.

Is the OPA2340UAG4 pin-compatible with other packages in the OPA2340 family?

Yes, the OPA2340UAG4 (VSSOP-8) shares identical pinout and functionality with the OPA2340P (PDIP-8) and OPA2340D (SOIC-8) variants. All three packages route –IN A, +IN A, OUT A, V–, +IN B, –IN B, OUT B, and V+ to pins 2, 3, 1, 4, 5, 6, 7, and 8 respectively. This allows drop-in replacement across package types during prototyping or volume manufacturing without PCB redesign.