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Texas Instruments OPA2704EA/2K5
- Part No.:
- OPA2704EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2704EA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
OPA2704EA/2K5 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for gain ≥5 applications. It delivers 3MHz gain-bandwidth product, 3V/µs slew rate, ±160µV max input offset voltage, 160µA quiescent current per amplifier, and operates from ±2V to ±6V dual supplies or 4V–12V single supply. It is used in precision sensor signal conditioning within automotive security systems.
For engineers reviewing the OPA2704EA/2K5 datasheet, OPA2704EA/2K5 pinout, OPA2704EA/2K5 application, or OPA2704EA/2K5 equivalent, key selection criteria include its gain-optimized stability (not unity-gain stable), rail-to-rail swing at low supply, microsize MSOP-8 package, and guaranteed performance over –40°C to +85°C.
Technical Context
The OPA2704EA/2K5 implements a complementary differential input stage enabling rail-to-rail common-mode input range extending 300mV beyond rails, and a class-AB output stage achieving 40mV rail-to-rail swing into 100kΩ. Its internal compensation is tailored for closed-loop gains of 5 or greater, ensuring stability without external compensation.
Unlike the unity-gain-stable OPA2703, the OPA2704EA/2K5 achieves higher dynamic performance-3MHz GBW and 3V/µs SR-at the cost of reduced stability margin below G = 5. It maintains full-scale CMRR of 90dB and PSRR >100dB across its operating voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - Enables stable operation with ≥5× closed-loop gain and usable bandwidth up to ~600kHz at G=5. |
| Slew Rate | 3V/µs - Supports fast settling of 5V step signals in ≤21µs (0.01%) at G=5, critical for data acquisition front-ends. |
| Input Offset Voltage | ±160µV (max) - Ensures <0.01% error in 16-bit DAC reference buffering and low-level transducer amplification. |
| Quiescent Current | 160µA per amplifier - Allows dual-channel precision amplification in battery-powered portable equipment with minimal power impact. |
| Rail-to-Rail I/O | Input extends (V−)−0.3V to (V+) +0.3V; output swings to within 40mV of rails - Maximizes dynamic range in 3.3V or 5V single-supply systems. |
| CMRR | 90dB (full-scale) - Rejects common-mode noise in automotive sensor interfaces where ground offsets are typical. |
| Supply Range | ±2V to ±6V dual or 4V–12V single - Compatible with standard industrial and automotive supply rails without level-shifting. |
Pinout & Package
OPA2704EA/2K5 is housed in an 8-pin VSSOP (DGK) package - a miniature surface-mount outline measuring 3.0mm × 3.0mm with 0.5mm pitch, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives load directly; rail-to-rail swing supports full-scale signal fidelity into high-Z or moderate-Z loads. |
| 2 (–IN A) | Inverting input A | Differential node for feedback network; high impedance (5TΩ || 4pF) minimizes loading on source. |
| 3 (+IN A) | Non-inverting input A | Accepts rail-to-rail common-mode signals; complementary input pair enables operation near supply rails. |
| 4 (V−) | Negative supply | Reference for dual-supply operation; must be bypassed with 1µF tantalum + 1000pF ceramic for stability. |
| 5 (+IN B) | Non-inverting input B | Independent channel input; identical specs to Channel A, enabling dual-sensor or dual-reference buffering. |
| 6 (–IN B) | Inverting input B | Separate feedback node; no crosstalk (120dB channel separation at DC) ensures independent channel operation. |
| 7 (OUT B) | Amplifier B output | Electrically isolated output; supports simultaneous dual-channel signal conditioning without interaction. |
| 8 (V+) | Positive supply | Power rail for both amplifiers; thermal resistance θJA = 150°C/W enables reliable operation at 85°C ambient. |
Key Features
| Feature | Design Value |
|---|---|
| Gain-optimized stability | Internally compensated for minimum gain of 5 - eliminates need for external compensation in G≥5 configurations, reducing BOM count. |
| Rail-to-rail input stage | Complementary N/P-channel input pairs extend common-mode range 300mV beyond rails - preserves accuracy when sensing near supply limits. |
| Ultra-low input bias current | 1pA (typ) - Enables high-impedance sensor interfacing (e.g., piezoelectric, pH electrodes) without significant offset drift. |
| Low-noise precision | 45nV/√Hz input voltage noise density at 1kHz - maintains SNR in low-amplitude signal chains like medical instrumentation front-ends. |
| Robust capacitive load drive | Stable with up to 1000pF pure capacitive load at G≥5 - simplifies driving ADC input capacitance or long cables without isolation resistors. |
Applications
| Automotive Sensor Signal Conditioning | Portable Data Acquisition Front-End |
|---|---|
|
Use Scenario: Amplifying low-level analog outputs from pressure, temperature, or position sensors in vehicle ECUs under 5V supply constraints. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail op amp providing gain ≥5, offset correction, and drive capability for 16-bit SAR ADC inputs. Use Value: Full 5V dynamic range utilization and 3MHz bandwidth enable accurate capture of transient events (e.g., crash detection) without clipping or phase lag. |
Use Scenario: Buffering and scaling sensor outputs in handheld test meters or IoT edge nodes powered by single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Dual amplifier performing simultaneous reference buffering (Channel A) and signal gain (Channel B) in compact layout. Use Value: 160µA per channel quiescent current extends battery life while rail-to-rail I/O maintains resolution across entire supply range. |
| Dual-Supply Precision Reference Buffer | Active Filter Stage in Audio Signal Path |
|
Use Scenario: Providing low-drift, low-noise buffered references for quad-voltage-output DACs (e.g., DAC7644) in automated test equipment. IC Role / Device Role / Timing Role: Dual op amp configured as non-inverting buffers (G=1) for positive/negative reference rails in split-supply systems. Use Value: ±160µV offset and 90dB CMRR ensure <0.001% reference error, critical for 16-bit monotonicity and INL performance. |
Use Scenario: Implementing second-order Sallen-Key or MFB filter stages in battery-powered audio preamps requiring low THD+N and wide bandwidth. IC Role / Device Role / Timing Role: Dual op amp serving as active gain block and filter integrator with 3V/µs slew rate preserving transient response. Use Value: 0.025% THD+N at 1kHz and 3MHz GBW support clean audio reproduction up to 20kHz with minimal group delay distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2703EA/2K5 | Unity-gain stable; 1MHz GBW, 0.6V/µs SR; same pinout, package, and quiescent current. | Better suited for G=1–4 circuits (e.g., unity-gain buffers, active filters with low Q); less suitable for high-speed G≥5 signal chains. | Select OPA2703EA/2K5 when stability at unity gain or lower closed-loop gains is required; avoid for >1MHz bandwidth needs. |
| MCP6022-E/SN | 2.8MHz GBW, 1.2V/µs SR, 250µA IQ, 3mV max VOS; SO-8 package, not pin-compatible. | Higher offset and current noise limit use in ultra-precision sensor paths; wider supply range (2.7–6V) suits 3.3V-only systems. | Choose MCP6022-E/SN only if 3.3V single-supply operation is mandatory and 3mV offset is acceptable; verify layout changes for SO-8 footprint. |
Compared with OPA2704EA/2K5, OPA2703EA/2K5 trades speed for universal gain stability, while MCP6022-E/SN offers broader supply compatibility at the expense of precision and pin compatibility - making OPA2704EA/2K5 optimal for gain ≥5, low-offset, rail-to-rail dual-channel designs.
Availability
OPA2704EA/2K5 is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable data acquisition systems, and dual-supply precision reference buffering requiring stable component supply across extended temperature ranges.
Supply support for OPA2704EA/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 signal chain solutions.
The OPA703/OPA704 family-including OPA2704EA/2K5-is designed for low-power, rail-to-rail precision amplification in space- and energy-constrained applications such as automotive electronics and portable instrumentation.
FAQ
Is OPA2704EA/2K5 unity-gain stable?
No, OPA2704EA/2K5 is not unity-gain stable. It is internally compensated for minimum closed-loop gain of 5. Using it at G=1 risks oscillation and instability. For unity-gain applications, select OPA2703EA/2K5 instead - the same package and pinout but unity-gain stable with 1MHz GBW. Always verify stability with phase margin simulation when designing with OPA2704EA/2K5.
What is the maximum capacitive load OPA2704EA/2K5 can drive reliably?
OPA2704EA/2K5 is characterized to drive up to 1000pF of pure capacitive load when configured for gain ≥5. This capability simplifies interfacing with ADC input capacitance (typically 10–30pF) or long PCB traces without added series resistance. At lower gains, stability degrades - consult the "Small-Signal Overshoot vs Capacitive Load" curve in the SBOS180A datasheet for gain-specific derating guidance.
Does OPA2704EA/2K5 support single-supply operation?
Yes, OPA2704EA/2K5 supports true single-supply operation from 4V to 12V. Its rail-to-rail input extends 300mV beyond the negative rail (e.g., ground), and output swings to within 40mV of both rails into light loads. This allows full-scale signal handling in 5V or 3.3V systems when biased appropriately - for example, using a mid-rail virtual ground for AC-coupled sensors.
What is the operating temperature range for OPA2704EA/2K5?
OPA2704EA/2K5 is fully specified and guaranteed over –40°C to +85°C, matching the industrial temperature grade. Absolute maximum ratings extend to –55°C to +125°C for storage and short-term operation, but electrical parameters (e.g., offset, GBW, CMRR) are only assured across the –40°C to +85°C range per the SBOS180A datasheet.
How does the input stage of OPA2704EA/2K5 achieve rail-to-rail common-mode range?
OPA2704EA/2K5 uses a complementary input stage: parallel N-channel and P-channel differential pairs. The N-pair dominates near the positive rail (V+ − 2.0V to V+ + 0.3V), the P-pair near the negative rail (V− − 0.3V to V+ − 1.5V), with a 500mV overlap region where both conduct. This architecture enables continuous operation across the full rail-to-rail input range without phase inversion or gain discontinuity - confirmed in Figure 2 of the SBOS180A datasheet.
OPA2704EA/2K5 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:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 160 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2704EA/2K5 FAQ
1.How can I place an order for OPA2704EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2704EA/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 OPA2704EA/2K5 reliable?
The price and inventory of OPA2704EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2704EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2704EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2704EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2704EA/2K5?
OPA2704EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2704EA/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 OPA2704EA/2K5?
For technical support, including OPA2704EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2704EA/2K5 requirements.
6.How does Aetrix verify that OPA2704EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2704EA/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 OPA2704EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2704EA/2K5?
All OPA2704EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2704EA/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 OPA2704EA/2K5 part is unused and in its original packaging.
Return procedure for OPA2704EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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