My Inquiry
My Account
Texas Instruments OPA2337EA/3K
- Part No.:
- OPA2337EA/3K
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
OPA2337EA/3K.pdf
- Description:
- IC CMOS 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,804
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2337EA/3K from Texas Instruments is a dual, rail-to-rail output CMOS operational amplifier in SOT23-8 package, designed for space-constrained, low-power applications. It features unity-gain stability, 3MHz gain-bandwidth product, 1.2V/µs slew rate, ±10pA max input bias current, and operates from 2.5V to 5.5V single supply - ideal for photodiode pre-amplification in portable medical instruments.
For engineers reviewing the OPA2337EA/3K datasheet, OPA2337EA/3K pinout, OPA2337EA/3K application, or OPA2337EA/3K equivalent, key selection criteria include its dual-channel independence, rail-to-rail output swing (125mV from rails at 25kΩ), low quiescent current (525µA per amplifier), and guaranteed operation down to 2.5V with ground-referenced input common-mode range.
Technical Context
The OPA2337EA/3K implements a CMOS input stage enabling ultra-low input bias current (±10pA max) and high input impedance (>10¹³ Ω), critical for high-impedance sensor interfaces like photodiodes. Its unity-gain stable architecture ensures robust performance without external compensation across all gains.
It delivers rail-to-rail output swing (125mV from V−/V+ at 25kΩ load) while maintaining 120dB open-loop gain and 74dB CMRR over −40°C to +85°C. Input common-mode range extends from (V−) − 0.2V to (V+) − 1.2V, supporting true single-supply operation with ground-referenced inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz at G = 1 - enables stable amplification of signals up to ~300kHz with minimal phase lag in unity-gain buffer configurations. |
| Slew Rate | 1.2V/µs - supports clean 100kHz full-scale output transitions with ≤0.1% distortion into 25kΩ loads. |
| Input Bias Current | ±10pA max - preserves signal integrity in high-impedance transducer interfaces (e.g., >1MΩ photodiode circuits). |
| Supply Voltage Range | 2.5V to 5.5V - allows direct integration into 3.3V and 5V battery-powered systems without regulation overhead. |
| Quiescent Current | 525µA per amplifier - enables dual-channel precision amplification with <1.1mA total supply current in always-on instrumentation. |
| Output Swing | 125mV from rails (RL = 25kΩ) - maximizes dynamic range in single-supply data acquisition chains driving ADCs. |
| Input Offset Voltage | ±3.5mV max (−40°C to +85°C) - ensures sub-10mV error budget in DC-coupled sensor signal conditioning. |
Pinout & Package
SOT23-8 surface-mount package (DCN designator), 2.9mm × 2.8mm footprint, 1.45mm height, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection - accepts 2.5V to 5.5V single supply; bypass with 0.01µF ceramic capacitor. |
| 2 | Out B | Output of second amplifier channel - rail-to-rail capable, drives 25kΩ load to within 125mV of V−/V+. |
| 3 | −In B | Inverting input of second amplifier - high-impedance CMOS node; bias current ≤10pA enables high-Z feedback networks. |
| 4 | +In B | Non-inverting input of second amplifier - shares same input specs as −In B; common-mode range includes ground. |
| 5 | Out A | Output of first amplifier channel - fully independent from Out B; crosstalk <0.3µV/V ensures isolated dual-channel operation. |
| 6 | −In A | Inverting input of first amplifier - electrically isolated from Channel B; no interaction during overload or saturation. |
| 7 | +In A | Non-inverting input of first amplifier - supports DC-coupled single-supply configurations with input down to V− − 0.2V. |
| 8 | V− | Negative supply rail (ground in single-supply use) - return path for both amplifiers; requires low-impedance grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range in 3.3V systems - outputs swing to within 125mV of V− and V+, maximizing ADC utilization. |
| FET-input architecture | Enables photodiode pre-amplifier designs with >1GΩ feedback resistors and negligible bias-current-induced offset drift. |
| Unity-gain stability | Operates reliably at G = 1 without external compensation - simplifies circuit design for buffers and active filters. |
| Dual-channel independence | Zero crosstalk between channels even under overload - maintains signal integrity in multi-sensor monitoring systems. |
| Single-supply operation from 2.5V | Eliminates need for split supplies in portable equipment - reduces bill-of-materials and PCB area in battery-powered instruments. |
Applications
| Photodiode Pre-Amplification | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in handheld pulse oximeters. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier converting photocurrent to voltage with minimal noise and offset. Use Value: 10pA input bias current prevents signal loss across 10MΩ–100MΩ feedback resistors; rail-to-rail output drives 12-bit ADC input directly. |
Use Scenario: Signal conditioning in portable ECG monitors powered by two AA cells (2.4V–3.2V). IC Role / Device Role / Timing Role: Dual op amp providing gain, filtering, and level-shifting for analog front-end before ADC sampling. Use Value: 525µA per amplifier enables >100-hour battery life; 2.5V minimum supply ensures operation until battery depletion. |
| Medical Sensor Interfaces | ADC Driver Circuits |
Use Scenario: Conditioning thermistor and strain gauge outputs in wearable diagnostic patches. IC Role / Device Role / Timing Role: Precision dual amplifier for ratiometric sensor excitation and differential signal amplification. Use Value: ±3.5mV max input offset and 120dB open-loop gain maintain <0.1% measurement accuracy across temperature. |
Use Scenario: Driving SAR ADC inputs (e.g., ADS7822) in low-power data loggers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating ADC sample-and-hold input from source impedance variations. Use Value: 1.2V/µs slew rate settles 2V step in 2µs (0.1%), preventing acquisition errors during high-speed sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual CMOS op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2340UA/2K5 | Higher GBW (5.5MHz), higher IQ (750µA/amp), SO-8 only - no SOT23-8 option. | Better bandwidth for audio or higher-frequency sensor signals; less suitable for ultra-low-power or space-constrained layouts. | Select when >3MHz bandwidth is required and board area allows SO-8; avoid when minimizing quiescent current or footprint is critical. |
| MCP6022-I/SN | Lower GBW (10MHz), higher input offset (2.5mV typ), same SOT23-8 package, 2.7V–5.5V supply. | Marginally better offset but lacks guaranteed 2.5V operation and rail-to-rail output swing specification. | Consider for cost-sensitive designs where 2.5V start-up and 125mV rail margin are non-critical; verify output swing at target supply. |
Compared with OPA2337EA/3K, OPA2340UA/2K5 offers higher speed at increased power and size cost, while MCP6022-I/SN trades guaranteed low-voltage operation and rail-to-rail swing for lower unit cost - making OPA2337EA/3K optimal for miniaturized, battery-critical sensor front-ends.
Availability
OPA2337EA/3K is available at Aetrix Electronics and suitable for photodiode pre-amplification, portable medical instrumentation, and low-power ADC driver circuits requiring stable component supply and long-term manufacturability.
Supply support for OPA2337EA/3K 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 OPA2337EA/3K belongs to TI's MicroAmplifier™ series, engineered specifically for miniature, single-supply, battery-operated applications demanding rail-to-rail output, ultra-low input bias current, and guaranteed unity-gain stability.
FAQ
What is the minimum operating voltage for the OPA2337EA/3K?
The OPA2337EA/3K operates down to 2.5V on a single supply, with full electrical specifications guaranteed from 2.7V to 5.5V. At 2.5V, it remains functional with rail-to-rail output swing and unity-gain stability, though some parameters (e.g., slew rate, GBW) may be slightly reduced versus 5V operation. This makes OPA2337EA/3K suitable for deeply discharged lithium coin-cell or alkaline battery applications.
Is the OPA2337EA/3K unity-gain stable?
Yes, the OPA2337EA/3K is explicitly unity-gain stable, as confirmed in the datasheet's "DESCRIPTION" and "APPLICATIONS INFORMATION" sections. It requires no external compensation for G = 1 configurations, including voltage followers and active filters. This distinguishes it from the OPA2338 series, which is optimized for G ≥ 5 and requires compensation for unity-gain use. The OPA2337EA/3K's stability is inherent to its internal compensation network.
What package type does the OPA2337EA/3K use?
The OPA2337EA/3K uses the SOT23-8 surface-mount package (TI package designator DCN), measuring 2.9mm × 2.8mm with 1.45mm height. It is supplied in tape-and-reel format (3000 units per reel) and has moisture sensitivity level 2 (MSL-2, 260°C peak reflow). This ultra-small dual op amp package is 1/4 the size of a standard SO-8, enabling high-density PCB layouts in portable devices.
Does the OPA2337EA/3K support rail-to-rail input?
No, the OPA2337EA/3K features rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode voltage range is specified from (V−) − 0.2V to (V+) − 1.2V - meaning it accepts inputs down to 0.2V below ground (enabling true single-supply ground-referenced operation) but not up to V+. For example, with V− = 0V and V+ = 3.3V, valid input range is −0.2V to 2.1V. This is sufficient for most sensor interfaces but excludes direct V+-referenced signals.
How does the OPA2337EA/3K compare to the OPA2338EA/3K?
The OPA2337EA/3K and OPA2338EA/3K share the same SOT23-8 package and CMOS input architecture but differ fundamentally in stability and speed: OPA2337EA/3K is unity-gain stable with 3MHz GBW and 1.2V/µs slew rate, while OPA2338EA/3K is optimized for G ≥ 5 with 12.5MHz GBW and 4.6V/µs slew rate. Use OPA2337EA/3K for general-purpose buffering and low-gain precision; choose OPA2338EA/3K only when high closed-loop gain and bandwidth are required - and add compensation for gains <5.
OPA2337EA/3K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- 3 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:
- SOT-23-8
OPA2337EA/3K FAQ
1.How can I place an order for OPA2337EA/3K through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2337EA/3K 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 OPA2337EA/3K reliable?
The price and inventory of OPA2337EA/3K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2337EA/3K is usually 5 days.
3.What payment methods are accepted for OPA2337EA/3K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2337EA/3K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2337EA/3K?
OPA2337EA/3K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2337EA/3K 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 OPA2337EA/3K?
For technical support, including OPA2337EA/3K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2337EA/3K requirements.
6.How does Aetrix verify that OPA2337EA/3K is sourced from the original manufacturer or authorized distributors?
All OPA2337EA/3K 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 OPA2337EA/3K meets industry standards.
7.What is the process for return or replacement of OPA2337EA/3K?
All OPA2337EA/3K units undergo pre-shipment inspection (PSI). If there is an issue with OPA2337EA/3K, 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 OPA2337EA/3K part is unused and in its original packaging.
Return procedure for OPA2337EA/3K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2337EA/3K 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…
