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Texas Instruments OPA2337EA/3KG4
- Part No.:
- OPA2337EA/3KG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
OPA2337EA/3KG4.pdf
- Description:
- IC CMOS 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,222
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Product details
Overview
OPA2337EA/3KG4 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 battery-powered instrumentation and photodiode pre-amplification.
For engineers reviewing the OPA2337EA/3KG4 datasheet, OPA2337EA/3KG4 pinout, OPA2337EA/3KG4 application, or OPA2337EA/3KG4 equivalent, key selection criteria include its dual-channel independence, rail-to-rail output swing (125mV from rails at 25kΩ), 120dB open-loop gain, 525µA per amplifier quiescent current, and guaranteed operation across −40°C to +85°C.
Technical Context
The OPA2337EA/3KG4 implements a CMOS input stage with FET-input architecture enabling ultra-low input bias current (±10pA max) and high input impedance (>10¹³ Ω). Its unity-gain stable design ensures robust performance without external compensation in G = 1 configurations.
It supports true single-supply operation with input common-mode range extending to ground (−0.2V) and rail-to-rail output swing, maintaining 100dB open-loop gain down to 2.7V supply. Channel separation exceeds 120dB at 1kHz, minimizing crosstalk in dual-channel signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - enables stable amplification up to audio frequencies with G = 1. |
| Slew Rate | 1.2V/µs - supports clean 2Vpp step response within 2µs settling (0.1%). |
| Input Bias Current | ±10pA max - preserves signal integrity in high-impedance sensor interfaces like photodiodes. |
| Quiescent Current | 525µA per amplifier - allows dual op-amp operation on coin-cell or 3.3V rail with minimal power impact. |
| Output Swing | 125mV from rails (RL = 25kΩ) - delivers full dynamic range near supply limits in single-supply systems. |
| Open-Loop Gain | 120dB typ - ensures <0.001% gain error in precision DC-coupled gain stages. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, 3.3V, and 5V logic domains without level-shifting. |
Pinout & Package
OPA2337EA/3KG4 is housed in an 8-pin SOT23-8 surface-mount package (DCN), measuring 2.9mm × 1.6mm × 1.1mm, with moisture sensitivity level MSL-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection for both amplifiers; must be bypassed with 0.01µF ceramic capacitor. |
| 2 | Out B | Output of second amplifier channel; rail-to-rail capable, drives loads ≥25kΩ. |
| 3 | −In B | Inverting input of second amplifier; high-impedance CMOS node (10¹³ Ω). |
| 4 | +In B | Non-inverting input of second amplifier; accepts common-mode voltage down to −0.2V. |
| 5 | Out A | Output of first amplifier channel; electrically isolated from Out B to ensure <0.3µV/V crosstalk. |
| 6 | −In A | Inverting input of first amplifier; matched to −In B for dual-channel differential applications. |
| 7 | +In A | Non-inverting input of first amplifier; identical electrical characteristics to +In B. |
| 8 | V− | Negative supply rail (typically ground in single-supply use); shared return path for both amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale signal headroom within 125mV of V+ and V−, maximizing ADC dynamic range in 3.3V systems. |
| FET-input architecture | Enables ≤10pA input bias current, critical for low-leakage photodiode and piezoelectric sensor front-ends. |
| Dual-channel independence | Guarantees <0.3µV/V channel separation, eliminating interaction during overload or overdrive conditions. |
| Unity-gain stable | Operates unconditionally stable at G = 1 without external compensation, simplifying filter and buffer designs. |
| Single-supply optimized input range | Accepts input voltages down to −0.2V (below ground), supporting true ground-referenced signal acquisition. |
Applications
| Battery-Powered Instruments | Photodiode Pre-Amps |
|---|---|
Use Scenario: Portable multimeters and handheld analyzers operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Dual-channel signal conditioning and buffering before 12-bit ADC sampling. Use Value: 525µA per amplifier quiescent current extends battery life; rail-to-rail output maximizes usable ADC input range at 3V supply. | Use Scenario: Low-light optical sensing in medical pulse oximeters or environmental particulate detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with high-Z input and low-noise gain. Use Value: ±10pA max input bias current prevents signal corruption from photodiode leakage; 26nV/√Hz input voltage noise preserves SNR. |
| Medical Instruments | Driving ADCs |
Use Scenario: ECG front-end analog signal chain requiring low-power, low-noise, and high CMRR. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier gain stage and reference buffer. Use Value: 90dB min CMRR and 120dB open-loop gain enable accurate differential measurement; −40°C to +85°C rating supports clinical environments. | Use Scenario: Anti-aliasing and driver stage for SAR ADCs such as ADS7822 in compact data loggers. IC Role / Device Role / Timing Role: Unity-gain buffer isolating ADC input from source impedance and driving capacitive sampling network. Use Value: 2µs 0.1% settling time meets 100ksps sampling requirements; rail-to-rail swing ensures full ADC code utilization. |
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 (800µA), SO-8 only - no SOT23-8 option. | Preferred where bandwidth >3MHz is required; unsuitable for ultra-compact layouts. | Select OPA2340UA/2K5 only if 5.5MHz GBW justifies larger footprint and 52% higher supply current. |
| LMV358IDR | Lower GBW (1MHz), higher IB (100nA), rail-to-rail output but not input - VCM does not reach ground. | Cost-sensitive industrial controls where photodiode or precision ground-referenced inputs are not needed. | Choose LMV358IDR only for non-critical, high-volume applications where input bias current >100nA and limited VCM range are acceptable. |
Compared with OPA2337EA/3KG4, OPA2340UA/2K5 offers higher speed at the cost of size and power, while LMV358IDR trades precision and input capability for cost - making OPA2337EA/3KG4 optimal for miniaturized, low-leakage, single-supply sensor interfaces.
Availability
OPA2337EA/3KG4 is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode pre-amplifiers, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2337EA/3KG4 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 emphasis on reliability, precision, and energy efficiency.
The OPA2337EA/3KG4 belongs to TI's MicroAmplifier™ series, engineered specifically for miniature, low-power, single-supply signal conditioning in portable and space-constrained systems.
FAQ
What is the operating temperature range for the OPA2337EA/3KG4?
The OPA2337EA/3KG4 is specified for operation from −40°C to +85°C, with absolute maximum ratings extending to −55°C and +125°C for storage and junction temperature. This range supports deployment in industrial handheld tools and clinical diagnostic equipment where ambient thermal stability is critical. The device maintains 120dB open-loop gain and rail-to-rail output swing across the full −40°C to +85°C range.
Is the OPA2337EA/3KG4 unity-gain stable?
Yes, the OPA2337EA/3KG4 is explicitly unity-gain stable as part of the OPA337 series. It requires no external compensation for G = 1 configurations, including voltage followers and active filters. This stability is confirmed in the datasheet's "APPLICATIONS INFORMATION" section and validated by the 3MHz gain-bandwidth product measured under G = 1 conditions. Attempting to use it in unstable configurations (e.g., uncompensated high-Q filters) may cause oscillation.
What package type and pin count does the OPA2337EA/3KG4 use?
The OPA2337EA/3KG4 uses an 8-pin SOT23-8 surface-mount package (package designator DCN), with dimensions of 2.9mm × 1.6mm × 1.1mm. It is RoHS-compliant, has NIPDAU lead finish, and carries MSL Level-2 (260°C peak reflow, 1-year floor life). Pin 1 orientation follows quadrant Q3 in tape-and-reel packaging, per TI's tape specification.
Can the OPA2337EA/3KG4 drive capacitive loads directly?
The OPA2337EA/3KG4 can drive moderate capacitive loads (≤100pF) without instability, as verified by typical overshoot curves showing <10% for CL = 100pF at G = 1. For loads exceeding 100pF - such as ADC input capacitance or long PCB traces - isolation via a series resistor (e.g., 10–50Ω) is recommended to maintain phase margin. The datasheet does not specify guaranteed stability beyond 100pF, and no internal compensation is provided for heavy capacitive loading.
What is the input common-mode voltage range of the OPA2337EA/3KG4?
The input common-mode voltage range of the OPA2337EA/3KG4 is specified as (V−) − 0.2V to (V+) − 1.2V, meaning it accepts inputs 0.2V below ground and up to 1.2V below the positive rail. At VS = 5V, this spans −0.2V to +3.8V. This ground-sensing capability enables true single-supply operation with AC-coupled or bipolar input signals referenced to system ground, unlike many rail-to-rail input op-amps that require level-shifting.
OPA2337EA/3KG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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/3KG4 FAQ
1.How can I place an order for OPA2337EA/3KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2337EA/3KG4 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/3KG4 reliable?
The price and inventory of OPA2337EA/3KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2337EA/3KG4 is usually 5 days.
3.What payment methods are accepted for OPA2337EA/3KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2337EA/3KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2337EA/3KG4?
OPA2337EA/3KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2337EA/3KG4 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/3KG4?
For technical support, including OPA2337EA/3KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2337EA/3KG4 requirements.
6.How does Aetrix verify that OPA2337EA/3KG4 is sourced from the original manufacturer or authorized distributors?
All OPA2337EA/3KG4 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/3KG4 meets industry standards.
7.What is the process for return or replacement of OPA2337EA/3KG4?
All OPA2337EA/3KG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2337EA/3KG4, 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/3KG4 part is unused and in its original packaging.
Return procedure for OPA2337EA/3KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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