Texas Instruments OPA2369AIDCNR

Overview

OPA2369AIDCNR from Texas Instruments is a dual, ultra-low-power, rail-to-rail input/output operational amplifier optimized for 1.8V–5.5V battery-powered systems. It delivers 700nA per channel quiescent current, 250µV max input offset voltage, 12kHz gain-bandwidth product, and zero-crossover architecture to eliminate input-stage distortion in low-voltage sensor signal conditioning.

For engineers reviewing the OPA2369AIDCNR datasheet, OPA2369AIDCNR pinout, OPA2369AIDCNR application, or OPA2369AIDCNR equivalent, key selection criteria include its sub-1µA/channel supply current, rail-to-rail I/O swing within 10mV of rails (RL = 100kΩ), 114dB CMRR, 0.4µV/°C offset drift, and operation down to 1.8V - critical for precision, long-life portable medical and instrumentation designs.

Technical Context

The OPA2369AIDCNR implements a zero-crossover input stage that eliminates the offset discontinuity typical of rail-to-rail complementary differential pairs, enabling stable DC accuracy across the full common-mode range (V– to V+). Its 12kHz GBW and 0.005V/µs slew rate support low-frequency precision amplification without stability compromise.

Designed for single-supply operation, it features true rail-to-rail input and output stages, 10pA typical input bias current, and 134dB open-loop gain (AOL) at 25°C - all specified over –40°C to +85°C with 1.8V minimum supply. The device avoids internal charge pumps or auxiliary supplies, relying solely on passive biasing for nano-power operation.

Key Specifications

Pinout & Package

SOT-23-8 (DCN) package: 2.9mm × 1.6mm × 1.1mm body, exposed pad optional, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 year.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA2369AIDCNR, the OPA2369AIDGKT offers identical performance in a thermally superior package but requires PCB redesign, while the LTC2050 provides order-of-magnitude better DC precision at the cost of 24× higher quiescent current - making OPA2369AIDCNR optimal for ultra-low-power, long-life embedded sensing.

Availability

OPA2369AIDCNR is available at Aetrix Electronics and suitable for battery voltage monitoring, portable medical diagnostics, low-power sensor signal conditioning, and handheld test equipment requiring stable component supply and guaranteed long-term availability.

Supply support for OPA2369AIDCNR 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 delivering analog and embedded processing solutions, with deep expertise in precision analog, low-power design, and high-reliability manufacturing.

The OPA2369AIDCNR belongs to TI's nanoPOWER precision op amp family, engineered specifically for battery-constrained, low-voltage (1.8V–5.5V) applications where microamp-level quiescent current, rail-to-rail operation, and DC accuracy must coexist - such as wearable health monitors and remote environmental sensors.

FAQ

What is the maximum operating temperature range for the OPA2369AIDCNR?

The OPA2369AIDCNR is specified over an ambient operating temperature range of –40°C to +85°C, with extended operation possible from –55°C to +125°C. All key parameters - including 700nA quiescent current per channel, 250µV offset voltage, and 114dB CMRR - are guaranteed across the –40°C to +85°C industrial range per the official Texas Instruments SBOS414B datasheet.

Does the OPA2369AIDCNR require external protection against input overvoltage?

Yes - the OPA2369AIDCNR input terminals are diode-clamped to the supply rails, and input signals exceeding (V–) –0.5V or (V+) +0.5V must be current-limited to ≤10mA. For example, if interfacing with a 5V sensor while powered from 1.8V, a series resistor (e.g., 4.7kΩ) is mandatory at each input to prevent damage, as explicitly stated in the "Protecting Inputs from Operating Voltage" section of the OPA2369AIDCNR datasheet.

Can the OPA2369AIDCNR drive capacitive loads, and what is the recommended limit?

The OPA2369AIDCNR is not unity-gain stable with large capacitive loads; Figure 20 in the SBOS414B datasheet shows increasing overshoot above 20pF. For reliable operation, keep capacitive load ≤20pF at G = +1. If driving cables or ADC input capacitance exceeds this, add a small isolation resistor (e.g., 10–50Ω) between output and load, or use a dedicated buffer stage - as confirmed by TI's stability analysis and typical characterization data.

Is the OPA2369AIDCNR pin-compatible with other dual op amps in SOT-23-8 packages?

No - the OPA2369AIDCNR uses a non-standard SOT-23-8 pinout (V– on Pin 4, V+ on Pin 8) that differs from industry-standard dual op amps like the LMV358 or MCP6022. Attempting direct replacement will cause incorrect biasing and functional failure. Always verify pin mapping using the "PIN CONFIGURATIONS" diagram on page 1 of the OPA2369AIDCNR datasheet before board layout or substitution.

What is the typical input bias current of the OPA2369AIDCNR, and how does it affect high-impedance sensor interfaces?

The OPA2369AIDCNR has a typical input bias current of 10pA and a maximum of 50pA over temperature. This ultra-low value minimizes voltage error across high-impedance sources - e.g., a 10MΩ thermistor network generates only 0.5mV offset error - making it ideal for precision pH probes, piezoresistive sensors, and electrochemical cells where leakage currents would otherwise dominate measurement uncertainty.