My Inquiry
My Account
Texas Instruments OPA2338UA/2K5
- Part No.:
- OPA2338UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2338UA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,202
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2338UA/2K5 from Texas Instruments is a dual, rail-to-rail output CMOS operational amplifier optimized for gain ≥5, delivering 12.5MHz gain-bandwidth and 4.6V/µs slew rate at 5V supply. It operates from 2.5V to 5.5V single supply, draws only 525µA per amplifier, and features 10pA max input bias current-ideal for photodiode pre-amplification and battery-powered instrumentation.
For engineers reviewing the OPA2338UA/2K5 datasheet, OPA2338UA/2K5 pinout, OPA2338UA/2K5 application, or OPA2338UA/2K5 equivalent, key selection factors include its G ≥ 5 stability requirement, SOT23-8 or SOIC-8 package options, rail-to-rail output swing down to 125mV from rails (RL = 25kΩ), FET-input low-noise performance, and compatibility with space-constrained, low-power signal conditioning circuits.
Technical Context
The OPA2338UA/2K5 implements a high-speed, unity-gain unstable CMOS op amp architecture optimized for closed-loop gains of 5 or higher. Its internal compensation ensures stability and minimal phase margin degradation when configured with ≥5× noise gain, enabling wide bandwidth without external compensation in standard non-inverting or inverting topologies.
It features independent dual amplifiers with no crosstalk coupling, rail-to-rail output swing (125mV from rails at RL = 25kΩ), input common-mode range extending to ground, and operation across −40°C to +85°C. Input bias current remains ≤10pA over temperature, supporting high-impedance sensor interfaces like photodiodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 12.5MHz at G = 5 - enables stable high-frequency amplification in sensor front-ends and ADC drivers. |
| Slew Rate | 4.6V/µs at G = 5 - supports fast transient response in audio and data acquisition systems. |
| Input Bias Current | ≤10pA max - preserves signal integrity in high-Z photodiode and medical electrode interfaces. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, coin-cell, and 3.3V/5V embedded systems without level-shifting. |
| Quiescent Current | 525µA per amplifier - enables multi-channel, always-on sensing in portable instruments. |
| Open-Loop Gain | 120dB typical - ensures high DC precision and low gain error in closed-loop configurations. |
| Output Swing | Rail-to-rail, 125mV from rails (RL = 25kΩ) - maximizes dynamic range in single-supply data converters. |
Pinout & Package
OPA2338UA/2K5 is packaged in an 8-pin SOIC (D) surface-mount package with standard JEDEC outline, 1.27mm pitch, and moisture sensitivity level 2 (260°C peak reflow). Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection - must be bypassed with 0.01µF ceramic capacitor near pin. |
| 2 | Out B | Output of second amplifier - drives loads up to 5kΩ while maintaining rail-to-rail swing. |
| 3 | −In B | Inverting input of second amplifier - high-impedance node (10¹³Ω) for feedback network attachment. |
| 4 | +In B | Non-inverting input of second amplifier - accepts signals from ground to V+ − 1.2V. |
| 5 | Out A | Output of first amplifier - electrically isolated from Out B to prevent crosstalk in dual-channel designs. |
| 6 | −In A | Inverting input of first amplifier - used for precision inverting gain stages with ≥5× noise gain. |
| 7 | +In A | Non-inverting input of first amplifier - supports single-supply sensor biasing with ground-referenced inputs. |
| 8 | V− | Negative supply rail (typically ground in single-supply use) - shared return path for both amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| G ≥ 5 stability | Internally compensated for minimum closed-loop gain of 5 - eliminates need for external compensation in most high-speed applications. |
| Rail-to-rail output | Swings within 125mV of V+ and V− at RL = 25kΩ - preserves full signal headroom in 3.3V or 5V systems driving ADCs. |
| FET-input architecture | 10pA max input bias current - enables accurate amplification of nanoamp-level photodiode currents without significant offset drift. |
| Low quiescent power | 525µA per amplifier at 5V - allows dual-channel operation in battery-powered devices with multi-day runtime. |
| Single-supply operation | Operates from 2.5V to 5.5V with input common-mode range including ground - simplifies power architecture in portable medical and test equipment. |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current signals from reverse-biased photodiodes in optical smoke detectors or pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with ≥5× noise gain, converting pA-level photocurrent into measurable voltage while rejecting dark current drift. Use Value: 10pA max input bias current minimizes input offset error; rail-to-rail output maximizes dynamic range into 12-bit ADCs. | Use Scenario: Signal conditioning front-end in handheld multimeters or portable gas analyzers operating on coin-cell batteries. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage for sensor outputs and reference voltages, powered from 3V supply. Use Value: 525µA per amplifier enables two independent channels with <1.1mA total quiescent draw - extends battery life beyond 500 hours. |
| Medical Instrumentation | Driving ADCs |
Use Scenario: Low-noise amplification of ECG electrode signals in wearable cardiac monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with high CMRR and rail-to-rail output swing. Use Value: Input common-mode range includes ground allows direct connection to electrode-sensed biopotentials; 12.5MHz GBW supports anti-alias filtering up to 10kHz. | Use Scenario: Driving the analog input of SAR ADCs such as ADS7822 in low-power data acquisition systems. IC Role / Device Role / Timing Role: High-speed, low-distortion buffer isolating ADC input from source impedance variations. Use Value: 4.6V/µs slew rate settles 2V steps in 1.4µs (0.1%), ensuring accurate sampling at >500ksps without missing codes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, high-speed, rail-to-rail output op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.02µV/°C offset drift vs. OPA2338UA/2K5's ±2µV/°C; lower 1/f noise but 350kHz GBW. | Better DC precision for thermocouple or strain gauge amplification; unsuitable for >100kHz AC-coupled signal paths. | Select OPA2333AIDR when ultra-low offset drift dominates over speed; choose OPA2338UA/2K5 when bandwidth and slew rate are critical. |
| TLV2462IDR | Unity-gain stable; 6.4MHz GBW; 1.6V/µs slew rate; higher 750µA IQ; wider 2.7V–6V supply range. | Compatible with lower-gain configurations (G = 1–2); less suitable for high-fidelity audio or fast-settling ADC drivers. | Choose TLV2462IDR for general-purpose dual op amp needs where G = 1 stability is required; retain OPA2338UA/2K5 for G ≥ 5, high-speed signal chains. |
Compared with OPA2333AIDR and TLV2462IDR, the OPA2338UA/2K5 uniquely balances high-speed performance (12.5MHz, 4.6V/µs) with ultra-low input bias current (≤10pA) and single-supply rail-to-rail output - making it optimal for photodiode preamps and battery-powered instrumentation requiring both speed and precision.
Availability
OPA2338UA/2K5 is available at Aetrix Electronics and suitable for photodiode pre-amplification, battery-powered instrumentation, and medical signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for OPA2338UA/2K5 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 OPA2338UA/2K5 belongs to TI's MicroAmplifier™ series, designed specifically for miniature, low-power, high-performance analog signal conditioning in space- and energy-constrained applications.
FAQ
Is OPA2338UA/2K5 unity-gain stable?
No, the OPA2338UA/2K5 is not unity-gain stable. It is internally compensated for minimum closed-loop gains of 5 or greater. Using it at G = 1 requires external compensation, such as the RC network shown in Figure 3 of the SBOS077B datasheet, to ensure stability and avoid oscillation.
What is the maximum operating temperature range for OPA2338UA/2K5?
The OPA2338UA/2K5 is specified for operation from −40°C to +85°C. Its absolute maximum junction temperature is 150°C, and storage temperature range is −55°C to +125°C - consistent with industrial-grade SOIC packaging and TI's standard reliability qualification.
Can OPA2338UA/2K5 drive capacitive loads directly?
The OPA2338UA/2K5 can drive moderate capacitive loads (≤100pF) without instability, as confirmed by typical overshoot curves in the datasheet. For larger loads (e.g., ADC input capacitance >100pF), a small isolation resistor (10–50Ω) between output and load is recommended to maintain phase margin and settling performance.
Does OPA2338UA/2K5 support single-supply operation with input signals at ground potential?
Yes, the OPA2338UA/2K5 supports true single-supply operation with input common-mode voltage range extending to (V−) − 0.2V - meaning it accepts signals at ground when V− = 0V. This enables direct interfacing with ground-referenced sensors like electret microphones or resistive bridges without level-shifting circuitry.
What is the part marking for OPA2338UA/2K5?
The OPA2338UA/2K5 is marked "OPA 2338UA" on the top surface of its SOIC-8 package, with "OPA" on the first line and "2338UA" on the second line. The marking aligns with TI's standard SOIC labeling convention and matches ordering documentation in the PACKAGE OPTION ADDENDUM.
OPA2338UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4.6V/µs
- Gain Bandwidth Product:
- 12.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 525µA (x2 Channels)
- Current - Output / Channel:
- 9 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2338UA/2K5 FAQ
1.How can I place an order for OPA2338UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2338UA/2K5 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA2338UA/2K5 reliable?
The price and inventory of OPA2338UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2338UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2338UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2338UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2338UA/2K5?
OPA2338UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2338UA/2K5 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA2338UA/2K5?
For technical support, including OPA2338UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2338UA/2K5 requirements.
6.How does Aetrix verify that OPA2338UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2338UA/2K5 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA2338UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2338UA/2K5?
All OPA2338UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2338UA/2K5, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA2338UA/2K5 part is unused and in its original packaging.
Return procedure for OPA2338UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2338UA/2K5 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
