Texas Instruments OPA2340EA/250G4

Overview

OPA2340EA/250G4 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 data acquisition systems driving 12-bit ADCs like the ADS7816.

For engineers reviewing the OPA2340EA/250G4 datasheet, OPA2340EA/250G4 pinout, OPA2340EA/250G4 application, or OPA2340EA/250G4 equivalent, key selection criteria include rail-to-rail input range extending 500 mV beyond supply rails, ultra-low input bias current (±0.2 pA typ), THD+N of 0.0007% at 1 kHz, and guaranteed operation from –40°C to 85°C in the 8-pin VSSOP package.

Technical Context

The OPA2340EA/250G4 uses a complementary CMOS input stage with parallel N- and P-channel differential pairs to achieve rail-to-rail input operation across –0.3 V to (V+) + 0.3 V. Its class AB output stage enables rail-to-rail output swing while maintaining >106 dB open-loop gain at 100-kΩ load.

It is unity-gain stable and specified for capacitive loads up to 1000 pF in unity-gain configuration; stability is enhanced by adding a 10–20 Ω series resistor at the output when driving large capacitive loads. The device draws only 750 µA per channel at 5 V supply.

Key Specifications

Pinout & Package

The OPA2340EA/250G4 is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm), optimized for space-constrained 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 OPA2340UA/2K5 and MCP6022-I/SN, the OPA2340EA/250G4 uniquely combines VSSOP miniaturization, guaranteed –0.3 V input capability at 2.7 V, and 0.2 pA input bias - making it irreplaceable in space-constrained, high-precision, low-voltage sensor interfaces.

Availability

OPA2340EA/250G4 is available at Aetrix Electronics and suitable for data acquisition, portable instrumentation, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for OPA2340EA/250G4 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 data converter ecosystems.

The OPA2340EA/250G4 belongs to the MicroAmplifier™ series, designed specifically for low-voltage, single-supply signal conditioning in space- and power-constrained applications such as portable test equipment and sensor front-ends.

FAQ

What is the operating temperature range for the OPA2340EA/250G4?

The OPA2340EA/250G4 is fully specified from –40°C to +85°C for commercial and industrial applications. It operates over an extended range of –55°C to +125°C, though electrical parameters outside the –40°C to +85°C range are not guaranteed. This makes the OPA2340EA/250G4 suitable for deployment in harsh environments like factory automation and outdoor instrumentation where thermal cycling occurs.

Does the OPA2340EA/250G4 support true rail-to-rail input at 2.7 V supply?

Yes, the OPA2340EA/250G4 guarantees rail-to-rail input operation from –0.3 V to (V+) + 0.3 V across its full 2.7 V to 5.5 V supply range. At 2.7 V, this means the input common-mode range extends from –0.3 V to +3.0 V - enabling direct interfacing with ground-referenced sensors and 0–2.5 V reference voltages without external level-shifting circuitry.

Can the OPA2340EA/250G4 drive a 1000-pF capacitive load in unity-gain configuration?

Yes, the OPA2340EA/250G4 is characterized to remain stable with up to 1000 pF of pure capacitive load in unity-gain configuration. For loads exceeding this value or in configurations with resistive parallel paths, adding a 10–20 Ω series resistor at the output improves phase margin and suppresses ringing - a technique validated in TI's SBOS073C datasheet Figure 25.

What is the maximum output current capability of the OPA2340EA/250G4?

The OPA2340EA/250G4 provides ±50 mA short-circuit output current per channel, with continuous output current limited by thermal constraints. Under typical conditions (T_A = 25°C, V_S = 5 V), it can deliver ±25 mA into resistive loads while maintaining rail-to-rail swing and <0.0007% THD+N - sufficient for driving ADC inputs, active filters, and moderate-impedance transducers.

How does the OPA2340EA/250G4 compare to the single-channel OPA340 in terms of pin compatibility?

The OPA2340EA/250G4 (dual, VSSOP-8) is not pin-compatible with the OPA340 (single, SOT-23-5 or SOIC-8). Its pinout follows the industry-standard dual op-amp configuration (V–, OUT A, –IN A, +IN A, +IN B, –IN B, OUT B, V+), differing fundamentally from both OPA340 variants. Board redesign is required when substituting between these families - the OPA2340EA/250G4 is intended for dual-channel integration, not drop-in replacement.