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Texas Instruments OPA2705EA/250
- Part No.:
- OPA2705EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2705EA/250.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:704
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Product details
Overview
OPA2705EA/250 from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier optimized for low-power, precision signal conditioning in single- or dual-supply systems. It delivers 1MHz gain-bandwidth, 0.6V/µs slew rate, 0.5mV max input offset voltage, 160µA quiescent current per amplifier, and operates from ±2V to ±6V (or 4V–12V single supply). It is used in automotive sensor interfaces and portable data acquisition front-ends.
For engineers reviewing the OPA2705EA/250 datasheet, OPA2705EA/250 pinout, OPA2705EA/250 application, or OPA2705EA/250 equivalent, key selection criteria include rail-to-rail I/O swing at low supply voltage, sub-200µA per-amplifier quiescent current, guaranteed –40°C to +85°C operation, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2705EA/250 employs a complementary input stage-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 rail-to-rail output swing within 40mV of V+ or V− under light loads (100kΩ).
It is unity-gain stable and specified across full temperature and supply ranges: open-loop gain ≥100dB (RL = 20kΩ), CMRR ≥96dB in limited range, PSRR ≥100dB, and input bias current ≤1pA at 25°C. Input protection diodes clamp signals exceeding rails by >300mV, requiring external current limiting to ≤10mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - supports stable unity-gain buffering and low-frequency filtering up to ~100kHz with phase margin >60° |
| Slew Rate | 0.6V/µs - enables clean 10Vpp output at ≤10kHz without distortion in unity-gain configuration |
| Input Offset Voltage | ±0.5mV (max) - contributes <0.01% error in 5V full-scale sensor signal conditioning |
| Quiescent Current | 160µA per amplifier - allows dual-channel operation from coin-cell or energy-harvesting sources |
| Input Bias Current | 1pA (max) - preserves high-impedance source integrity (e.g., pH electrodes, piezoelectric sensors) |
| Rail-to-Rail Output Swing | Within 40mV of rails (RL = 100kΩ) - maximizes dynamic range in 3.3V or 5V systems |
| Common-Mode Rejection | 96dB (limited range) - suppresses supply noise and shared-mode interference in noisy automotive environments |
Pinout & Package
VSSOP-8 (DGK) package: 3mm × 3mm body, 0.65mm pitch, exposed thermal pad (not electrically connected), moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In A | Non-inverting input of Amplifier A - high-impedance node (5TΩ || 4pF) for precision sensing |
| 2 | –In A | Inverting input of Amplifier A - matched to Pin 1 for optimal CMRR and offset performance |
| 3 | Out A | Amplifier A output - capable of sourcing/sinking ±10mA into resistive loads |
| 4 | V– | Negative supply rail - must be bypassed with 1000pF ceramic + 1µF tantalum capacitors |
| 5 | V+ | Positive supply rail - shared by both amplifiers; decoupling critical for PSRR >100dB |
| 6 | –In B | Inverting input of Amplifier B - electrically isolated from Amplifier A; channel separation >120dB @ 1kHz |
| 7 | +In B | Non-inverting input of Amplifier B - identical input structure and impedance to Pin 1 |
| 8 | Out B | Amplifier B output - independent drive capability; no crosstalk-induced settling delay vs. Out A |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal utilization in 3.3V/5V systems without level-shifting circuitry |
| 160µA per amplifier quiescent current | Supports always-on sensor monitoring in battery-powered modules with >1-year runtime |
| 1pA input bias current | Eliminates significant offset error when interfacing with high-Z sources (e.g., thermocouples, photodiodes) |
| Unity-gain stability | Permits direct use as voltage follower or active filter without external compensation components |
| Specified over –40°C to +85°C | Validated for under-hood automotive applications and industrial field equipment without derating |
Applications
| Automotive Sensor Interface | Portable Data Acquisition |
|---|---|
Use Scenario: Amplifying low-level analog outputs from pressure, temperature, or position sensors in engine control units. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing rail-to-rail buffering and anti-alias filtering before ADC sampling. Use Value: 0.5mV offset and 96dB CMRR minimize calibration drift across temperature; 160µA per channel extends ECU sleep-mode battery life. |
Use Scenario: Front-end amplification for handheld multimeters or IoT environmental monitors with microcontroller ADCs. IC Role / Device Role / Timing Role: Dual op-amp performing simultaneous sensor signal gain and reference buffer functions. Use Value: MSOP-8 footprint saves board area; rail-to-rail I/O preserves resolution in 3.3V-supplied systems with limited headroom. |
| Transducer Signal Conditioning | Active Filter Stage |
Use Scenario: Biasing and amplifying output from piezoelectric accelerometers or strain gauges in structural health monitoring. IC Role / Device Role / Timing Role: High-input-impedance transducer amplifier with DC-coupled gain and low-noise signal path. Use Value: 1pA input bias prevents charge leakage errors; 45nV/√Hz input voltage noise maintains SNR in low-frequency vibration analysis. |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filters in audio preamps or sensor signal cleanup circuits. IC Role / Device Role / Timing Role: Unity-gain stable amplifier configured as filter integrator and buffer stage. Use Value: 1MHz GBW supports cutoff frequencies up to ~100kHz; 0.6V/µs slew rate avoids slew-induced distortion in 10Vpp filter outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2316IDR | Lower quiescent current (50µA), lower GBW (10MHz), higher input bias (0.2pA typical), same VSSOP-8 package | Better for ultra-low-power always-on sensing; less suitable for 1MHz signal bandwidth requirements | Select OPA2316IDR only if supply current is primary constraint and bandwidth <500kHz suffices |
| MCP6022-E/SN | Higher quiescent current (1mA), higher offset (2.5mV), wider supply range (2.7–6V), SOIC-8 only | More robust against ESD but degrades accuracy in precision low-voltage systems | Choose MCP6022-E/SN only for cost-sensitive industrial designs where 2.5mV offset is acceptable |
Compared with OPA2705EA/250, OPA2316IDR trades bandwidth for ultra-low power, while MCP6022-E/SN sacrifices precision and efficiency for broader voltage compatibility and lower unit cost-neither is pin-compatible, and both require layout revision.
Availability
OPA2705EA/250 is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable data acquisition systems, and transducer signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2705EA/250 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 automotive-grade signal chain solutions.
The OPA705 family-including OPA2705EA/250-is designed for cost-sensitive, low-power applications demanding rail-to-rail I/O performance in harsh environments like automotive cabins and portable instrumentation.
FAQ
What is the operating temperature range for OPA2705EA/250?
The OPA2705EA/250 is fully specified and guaranteed over –40°C to +85°C, with extended operating range from –55°C to +125°C. This makes OPA2705EA/250 suitable for under-dash automotive modules and industrial edge devices where ambient temperatures exceed standard commercial limits.
Does OPA2705EA/250 support single-supply operation?
Yes, OPA2705EA/250 operates from a single supply of 4V to 12V, enabling direct integration into 3.3V- and 5V-based systems with rail-to-rail input and output swing. Its input common-mode range extends 300mV beyond both rails, and output swings within 40mV of each rail under light loads-critical for maximizing dynamic range in low-voltage designs.
Is OPA2705EA/250 unity-gain stable?
Yes, OPA2705EA/250 is unity-gain stable and requires no external compensation. It maintains ≥60° phase margin in G = +1 configurations, supporting direct use as a voltage follower, active filter integrator, or reference buffer without risk of oscillation-even with 100pF capacitive loads.
What package type is used for OPA2705EA/250?
OPA2705EA/250 uses the VSSOP-8 (DGK) package: 3mm × 3mm body, 0.65mm lead pitch, and RoHS-compliant NiPdAu finish. This compact surface-mount package supports high-density PCB layouts and is compatible with standard reflow profiles (MSL Level-2, 260°C peak).
Can OPA2705EA/250 drive capacitive loads?
Yes, OPA2705EA/250 can drive up to 1000pF pure capacitive load while maintaining stability. For unity-gain configurations with large capacitive loads (>100pF), adding a 10Ω–20Ω series resistor inside the feedback loop improves step response and reduces overshoot-without affecting DC accuracy or gain.
OPA2705EA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.6V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 160µA (x2 Channels)
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2705EA/250 FAQ
1.How can I place an order for OPA2705EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2705EA/250 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 OPA2705EA/250 reliable?
The price and inventory of OPA2705EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2705EA/250 is usually 5 days.
3.What payment methods are accepted for OPA2705EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2705EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2705EA/250?
OPA2705EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2705EA/250 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 OPA2705EA/250?
For technical support, including OPA2705EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2705EA/250 requirements.
6.How does Aetrix verify that OPA2705EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA2705EA/250 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 OPA2705EA/250 meets industry standards.
7.What is the process for return or replacement of OPA2705EA/250?
All OPA2705EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2705EA/250, 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 OPA2705EA/250 part is unused and in its original packaging.
Return procedure for OPA2705EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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