My Inquiry
My Account
Texas Instruments OPA2345EA/2K5G4
- Part No.:
- OPA2345EA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2345EA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2345EA/2K5G4 from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier optimized for gains ≥5 and single-supply operation from 2.7V to 5.5V. It delivers 3MHz gain-bandwidth, 2V/µs slew rate, <1mV output swing from rails (RL = 100kΩ), 0.006% THD+N at 1kHz, and 150µA typical quiescent current per amplifier - enabling precision signal conditioning in space-constrained, low-power data acquisition systems.
For engineers reviewing the OPA2345EA/2K5G4 datasheet, OPA2345EA/2K5G4 pinout, OPA2345EA/2K5G4 application, or OPA2345EA/2K5G4 equivalent, key selection criteria include its gain-stability requirement (G ≥ 5), rail-to-rail I/O performance at low supply voltages, microsize MSOP-8 packaging, and verified suitability for driving sampling ADCs like ADS7822 in battery-powered instrumentation.
Technical Context
The OPA2345EA/2K5G4 implements a complementary CMOS input stage with parallel N-channel and P-channel differential pairs to achieve rail-to-rail input common-mode range extending 300mV beyond both supply rails. Its class AB output stage enables 1mV output swing from rails under light loads while maintaining ≥96dB open-loop gain.
This dual op amp is internally compensated for stable operation only at closed-loop gains of 5 or greater, distinguishing it from the unity-gain-stable OPA2344 family. Its 3MHz GBW and 2V/µs slew rate are specified at G = 5, VS = 5.5V, and TA = +25°C with RL = 10kΩ to VS/2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable closed-loop amplification up to 3MHz when configured for gain ≥5. |
| Slew Rate | 2V/µs - enables accurate reproduction of fast 2V-step signals within 1.5µs settling time (0.1%). |
| Input Offset Voltage | ±0.2mV (typ) - ensures high DC accuracy in precision sensor interfaces and I/V conversion. |
| Quiescent Current | 150µA per amplifier (typ) - allows dual-channel operation below 300µA total, critical for coin-cell or energy-harvesting systems. |
| Output Swing | Within 1mV of rails (RL = 100kΩ) - maximizes dynamic range in 3V or 5V single-supply systems. |
| THD + Noise | 0.006% at 1kHz - meets audio-grade and high-fidelity data acquisition requirements. |
| Common-Mode Range | –0.3V to (V+) + 0.3V - permits direct interfacing with sensors operating near ground or V+. |
Pinout & Package
OPA2345EA/2K5G4 is packaged in an 8-pin MSOP (VSSOP) with exposed thermal pad (DGK drawing), measuring 3.0mm × 3.0mm × 1.0mm - optimized for high-density PCB layouts and thermal performance (θJA = 150°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V– (Ground) | Negative supply reference; must be connected to system ground in single-supply configurations. |
| 2 | Out A | Amplifier A output; capable of rail-to-rail swing and ±15mA short-circuit current. |
| 3 | –In A | Inverting input for Amplifier A; part of complementary input pair enabling rail-to-rail common-mode range. |
| 4 | +In A | Non-inverting input for Amplifier A; laser-trimmed for low offset and drift. |
| 5 | +In B | Non-inverting input for Amplifier B; electrically isolated but matched to Amplifier A for dual-channel applications. |
| 6 | –In B | Inverting input for Amplifier B; shares same input stage architecture and specifications as Pin 3. |
| 7 | Out B | Amplifier B output; identical AC/DC performance to Pin 2, supporting independent dual-channel operation. |
| 8 | V+ | Positive supply rail; operates from 2.7V to 5.5V; requires 0.01µF ceramic bypass capacitor to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 300mV beyond V– and V+, enabling direct connection to sensors or DAC outputs near supply rails. |
| Rail-to-rail output | Swings within 1mV of V– and V+ under light loads, preserving full signal swing in low-voltage systems (e.g., 3.3V or 2.7V). |
| Low quiescent current | 150µA per amplifier enables dual-channel operation at <300µA total - ideal for portable and always-on monitoring devices. |
| High-speed precision | 3MHz GBW and 2V/µs slew rate at G ≥ 5 support accurate amplification of medium-bandwidth sensor signals without phase distortion. |
| Low distortion | 0.006% THD+N at 1kHz ensures fidelity in audio processing and high-resolution data acquisition paths. |
Applications
| PCMCIA Data Acquisition Card | Speech Bandpass Filtered System |
|---|---|
Use Scenario: Signal conditioning front-end for 12-bit sampling ADC (e.g., ADS7822) in compact PCMCIA cards with strict power and area constraints. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage; Amplifier A drives ADC input capacitance and filters charge injection, Amplifier B provides microphone preamplification. Use Value: Enables full 12-bit resolution capture with <500µA total system quiescent current and no external passive components beyond RC filter network. | Use Scenario: Electret microphone interface with 300Hz–3kHz bandpass filtering for voice recording in handheld medical or industrial recorders. IC Role / Device Role / Timing Role: First-stage preamplifier (G = 100) and second-stage active filter driver; exploits rail-to-rail I/O to maximize SNR at 2.7V supply. Use Value: Delivers >70dB dynamic range using only one dual op amp and passive RC network - eliminating need for discrete gain stages or voltage translation. |
| Process Control Sensor Interface | Active Low-Pass Filter for Test Equipment |
Use Scenario: Conditioning thermocouple or RTD bridge outputs in 4–20mA loop-powered transmitters operating from 3.3V local supply. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end (with external resistors) followed by rail-to-rail output buffer driving analog output stage. Use Value: Maintains ±0.2mV offset and <3µV/°C drift across –40°C to +85°C, ensuring <0.1% measurement error over full industrial temperature range. | Use Scenario: 2nd-order Sallen-Key low-pass filter (fc = 10kHz) in portable oscilloscope or signal generator output stage. IC Role / Device Role / Timing Role: Active filter integrator and output driver; uses G = 5 configuration to ensure stability and flat group delay up to 3MHz. Use Value: Achieves <0.01% passband ripple and –40dB stopband attenuation at 100kHz while consuming <300µA - replacing larger, higher-power alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2344EA/2K5 | Unity-gain stable; 1MHz GBW; 0.8V/µs slew rate; identical pinout and package. | Preferred for G = 1–4 configurations (e.g., voltage followers, basic buffers) where stability at low gain is required. | Select OPA2344EA/2K5 when gain <5 is needed; OPA2345EA/2K5G4 is mandatory for G ≥ 5 due to internal compensation. |
| MCP6022-E/SN | 2.8MHz GBW; 1.2V/µs slew rate; 100µA IQ; SO-8 package; not rail-to-rail input (CMVR = V– to V+ – 1.2V). | Suitable for non-rail-to-rail applications where input signals stay >1.2V below V+; lower IQ but reduced input voltage range. | Choose MCP6022-E/SN only if input common-mode range requirements are relaxed; OPA2345EA/2K5G4 remains superior for true rail-to-rail sensor interfacing. |
Compared with OPA2344EA/2K5 and MCP6022-E/SN, the OPA2345EA/2K5G4 uniquely combines guaranteed stability at G ≥ 5, rail-to-rail input *and* output, sub-millivolt output swing, and 3MHz bandwidth - making it the only option among the three for precision, high-speed, low-voltage dual-amplifier applications demanding full supply utilization.
Availability
OPA2345EA/2K5G4 is available at Aetrix Electronics and suitable for PCMCIA data acquisition cards, speech bandpass filtered systems, and process control sensor interfaces requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for OPA2345EA/2K5G4 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 signal chain solutions.
The OPA2345EA/2K5G4 belongs to TI's MicroAmplifier™ series - designed specifically for low-power, miniature, single-supply applications demanding rail-to-rail performance, high accuracy, and robust operation from –40°C to +85°C.
FAQ
What is the minimum recommended closed-loop gain for stable operation of the OPA2345EA/2K5G4?
The OPA2345EA/2K5G4 is internally compensated for stable operation only at closed-loop gains of 5 or greater. Using it at gains below 5 may cause peaking, ringing, or oscillation. This distinguishes it from the unity-gain-stable OPA2344 family. Always verify stability with load and layout in final design; the OPA2345EA/2K5G4 datasheet specifies all AC parameters at G = 5.
Does the OPA2345EA/2K5G4 support true rail-to-rail input and output operation?
Yes, the OPA2345EA/2K5G4 supports rail-to-rail input with a common-mode voltage range from –0.3V to (V+) + 0.3V, and rail-to-rail output with swing within 1mV of both rails under light loads (RL = 100kΩ). This is achieved via complementary input stage and class AB output stage - critical for maximizing dynamic range in 2.7V–5.5V single-supply systems.
What package type and marking does the OPA2345EA/2K5G4 use?
The OPA2345EA/2K5G4 uses an 8-pin MSOP (VSSOP) package with DGK drawing and device marking "B45". It is RoHS-compliant, green (low-halogen), and moisture-sensitive level 2 (260°C peak reflow). The "G4" suffix denotes tape-and-reel packaging with TI's standard green finish and lead finish (NiPdAu).
Can the OPA2345EA/2K5G4 drive capacitive loads directly, and what is the maximum value?
Yes, the OPA2345EA/2K5G4 can directly drive up to 250pF of pure capacitive load when configured for gains greater than 5. Stability improves with increasing gain. For unity-gain configurations, external series resistance (10Ω–20Ω) is required. The OPA2345EA/2K5G4's phase margin and small-signal overshoot vs. capacitive load are characterized in the TI SBOS107A datasheet Figure 17.
How does the OPA2345EA/2K5G4 compare to the OPA2344EA/2K5 in terms of bandwidth and gain stability?
The OPA2345EA/2K5G4 offers 3MHz gain-bandwidth and is optimized for gains ≥5, whereas the OPA2344EA/2K5 provides 1MHz GBW and is unity-gain stable. Both share identical pinout, package, quiescent current, and rail-to-rail performance - but their internal compensation differs fundamentally. Select OPA2345EA/2K5G4 only when ≥5× gain is used; otherwise, OPA2344EA/2K5 is the correct choice.
OPA2345EA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 150µA (x2 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2345EA/2K5G4 FAQ
1.How can I place an order for OPA2345EA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2345EA/2K5G4 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 OPA2345EA/2K5G4 reliable?
The price and inventory of OPA2345EA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2345EA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2345EA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2345EA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2345EA/2K5G4?
OPA2345EA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2345EA/2K5G4 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 OPA2345EA/2K5G4?
For technical support, including OPA2345EA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2345EA/2K5G4 requirements.
6.How does Aetrix verify that OPA2345EA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2345EA/2K5G4 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 OPA2345EA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2345EA/2K5G4?
All OPA2345EA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2345EA/2K5G4, 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 OPA2345EA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2345EA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2345EA/2K5G4 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…
